README.md

@@ -29,4 +29,4 @@ In all generated scenarios, if the ID value is not 0 or blank, that ID will be u
 
 ## Usage
 
-Full documentation [is available on the project site](https://bitbadger.solutions/open-source/pdo-document/).
+Full documentation [is available on the project site](https://relationaldocs.bitbadger.solutions/php/).

src/Custom.php

@@ -9,7 +9,7 @@ declare(strict_types=1);
 namespace BitBadger\PDODocument;
 
 use BitBadger\InspiredByFSharp\Option;
-use BitBadger\PDODocument\Mapper\Mapper;
+use BitBadger\PDODocument\Mapper\{Mapper, StringMapper};
 use PDO;
 use PDOException;
 use PDOStatement;
@@ -92,6 +92,41 @@ class Custom
         return iterator_to_array(self::list($query, $parameters, $mapper)->items());
     }
 
+    /**
+     * Execute a query that returns a JSON string of results
+     *
+     * @param string $query The query to be executed
+     * @param array<string, mixed> $parameters Parameters to use in executing the query
+     * @return string A JSON array with the results (empty results will be `[]`)
+     * @throws DocumentException If any is encountered
+     */
+    public static function jsonArray(string $query, array $parameters): string
+    {
+        return '[' . implode(',', self::array($query, $parameters, new StringMapper('data'))) . ']';
+    }
+
+    /**
+     * Execute a query, echoing the results to the output
+     *
+     * @param string $query The query to be executed
+     * @param array<string, mixed> $parameters Parameters to use in executing the query
+     * @throws DocumentException If any is encountered
+     */
+    public static function outputJsonArray(string $query, array $parameters): void
+    {
+        $isFirst = true;
+        echo '[';
+        foreach (self::list($query, $parameters, new StringMapper('data'))->items() as $doc) {
+            if ($isFirst) {
+                $isFirst = false;
+            } else {
+                echo ',';
+            }
+            echo $doc;
+        }
+        echo ']';
+    }
+
     /**
      * Execute a query that returns one or no results (returns false if not found)
      *
@@ -112,6 +147,19 @@ class Custom
         }
     }
 
+    /**
+     * Execute a query that returns one or no JSON results
+     *
+     * @param string $query The query to be executed (will have "LIMIT 1" appended)
+     * @param array<string, mixed> $parameters Parameters to use in executing the query
+     * @return string The JSON document (returns `{}` if no document is found)
+     * @throws DocumentException If any is encountered
+     */
+    public static function jsonSingle(string $query, array $parameters): string
+    {
+        return self::single($query, $parameters, new StringMapper('data'))->getOrDefault('{}');
+    }
+
     /**
      * Execute a query that does not return a value
      *

src/Json.php

@@ -0,0 +1,252 @@
+<?php
+/**
+ * @author Daniel J. Summers <daniel@bitbadger.solutions>
+ * @license MIT
+ */
+
+declare(strict_types=1);
+
+namespace BitBadger\PDODocument;
+
+/**
+ * Functions to retrieve and output documents as JSON
+ */
+class Json
+{
+    /**
+     * Retrieve all JSON documents in the given table
+     *
+     * @param string $tableName The table from which documents should be retrieved
+     * @param Field[] $orderBy Fields by which the results should be ordered (optional, default no ordering)
+     * @return string A JSON array of all documents from the table
+     * @throws DocumentException If any is encountered
+     */
+    public static function all(string $tableName, array $orderBy = []): string
+    {
+        return Custom::jsonArray(Query::selectFromTable($tableName) . Query::orderBy($orderBy), []);
+    }
+
+    /**
+     * Retrieve a JSON document by its ID
+     *
+     * @param string $tableName The table from which the document should be retrieved
+     * @param mixed $docId The ID of the document to retrieve
+     * @return string The JSON document if found, `{}` otherwise
+     * @throws DocumentException If any is encountered
+     */
+    public static function byId(string $tableName, mixed $docId): string
+    {
+        return Custom::jsonSingle(Query\Find::byId($tableName, $docId), Parameters::id($docId));
+    }
+
+    /**
+     * Retrieve JSON documents via a comparison on JSON fields
+     *
+     * @param string $tableName The table from which documents should be retrieved
+     * @param Field[] $fields The field comparison to match
+     * @param FieldMatch|null $match How to handle multiple conditions (optional; defaults to All)
+     * @param Field[] $orderBy Fields by which the results should be ordered (optional, default no ordering)
+     * @return string A JSON array of documents matching the given field comparison
+     * @throws DocumentException If any is encountered
+     */
+    public static function byFields(string $tableName, array $fields, ?FieldMatch $match = null,
+                                    array $orderBy = []): string
+    {
+        Parameters::nameFields($fields);
+        return Custom::jsonArray(Query\Find::byFields($tableName, $fields, $match) . Query::orderBy($orderBy),
+            Parameters::addFields($fields, []));
+    }
+
+    /**
+     * Retrieve JSON documents via a JSON containment query (`@>`; PostgreSQL only)
+     *
+     * @param string $tableName The name of the table from which documents should be retrieved
+     * @param mixed[]|object $criteria The criteria for the JSON containment query
+     * @param Field[] $orderBy Fields by which the results should be ordered (optional, default no ordering)
+     * @return string A JSON array of documents matching the JSON containment query
+     * @throws DocumentException If the database mode is not PostgreSQL, or if an error occurs
+     */
+    public static function byContains(string $tableName, array|object $criteria, array $orderBy = []): string
+    {
+        return Custom::jsonArray(Query\Find::byContains($tableName) . Query::orderBy($orderBy),
+            Parameters::json(':criteria', $criteria));
+    }
+
+    /**
+     * Retrieve JSON documents via a JSON Path match query (`@?`; PostgreSQL only)
+     *
+     * @param string $tableName The name of the table from which documents should be retrieved
+     * @param string $path The JSON Path match string
+     * @param Field[] $orderBy Fields by which the results should be ordered (optional, default no ordering)
+     * @return string A JSON array of documents matching the JSON Path
+     * @throws DocumentException If the database mode is not PostgreSQL, or if an error occurs
+     */
+    public static function byJsonPath(string $tableName, string $path, array $orderBy = []): string
+    {
+        return Custom::jsonArray(Query\Find::byJsonPath($tableName) . Query::orderBy($orderBy), [':path' => $path]);
+    }
+
+    /**
+     * Retrieve JSON documents via a comparison on JSON fields, returning only the first result
+     *
+     * @param string $tableName The table from which the document should be retrieved
+     * @param Field[] $fields The field comparison to match
+     * @param FieldMatch|null $match How to handle multiple conditions (optional; defaults to All)
+     * @param Field[] $orderBy Fields by which the results should be ordered (optional, default no ordering)
+     * @return string The first JSON document if any matches are found, `{}` otherwise
+     * @throws DocumentException If any is encountered
+     */
+    public static function firstByFields(string $tableName, array $fields, ?FieldMatch $match = null,
+                                         array $orderBy = []): string
+    {
+        Parameters::nameFields($fields);
+        return Custom::jsonSingle(Query\Find::byFields($tableName, $fields, $match) . Query::orderBy($orderBy),
+            Parameters::addFields($fields, []));
+    }
+
+    /**
+     * Retrieve JSON documents via a JSON containment query (`@>`), returning only the first result (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table from which documents should be retrieved
+     * @param mixed[]|object $criteria The criteria for the JSON containment query
+     * @param Field[] $orderBy Fields by which the results should be ordered (optional, default no ordering)
+     * @return string The first JSON document if any matches are found, `{}` otherwise
+     * @throws DocumentException If the database mode is not PostgreSQL, or if an error occurs
+     */
+    public static function firstByContains(string $tableName, array|object $criteria, array $orderBy = []): string
+    {
+        return Custom::jsonSingle(Query\Find::byContains($tableName) . Query::orderBy($orderBy),
+            Parameters::json(':criteria', $criteria));
+    }
+
+    /**
+     * Retrieve JSON documents via a JSON Path match query (`@?`), returning only the first result (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table from which documents should be retrieved
+     * @param string $path The JSON Path match string
+     * @param Field[] $orderBy Fields by which the results should be ordered (optional, default no ordering)
+     * @return string The first JSON document if any matches are found, `{}` otherwise
+     * @throws DocumentException If the database mode is not PostgreSQL, or if an error occurs
+     */
+    public static function firstByJsonPath(string $tableName, string $path, array $orderBy = []): string
+    {
+        return Custom::jsonSingle(Query\Find::byJsonPath($tableName) . Query::orderBy($orderBy), [':path' => $path]);
+    }
+
+    /**
+     * Output all JSON documents in the given table
+     *
+     * @param string $tableName The table from which documents should be retrieved
+     * @param Field[] $orderBy Fields by which the results should be ordered (optional, default no ordering)
+     * @throws DocumentException If any is encountered
+     */
+    public static function outputAll(string $tableName, array $orderBy = []): void
+    {
+        Custom::outputJsonArray(Query::selectFromTable($tableName) . Query::orderBy($orderBy), []);
+    }
+
+    /**
+     * Output a JSON document by its ID
+     *
+     * @param string $tableName The table from which the document should be retrieved
+     * @param mixed $docId The ID of the document to retrieve
+     * @throws DocumentException If any is encountered
+     */
+    public static function outputById(string $tableName, mixed $docId): void
+    {
+        echo self::byId($tableName, $docId);
+    }
+
+    /**
+     * Output JSON documents via a comparison on JSON fields
+     *
+     * @param string $tableName The table from which documents should be retrieved
+     * @param Field[] $fields The field comparison to match
+     * @param FieldMatch|null $match How to handle multiple conditions (optional; defaults to All)
+     * @param Field[] $orderBy Fields by which the results should be ordered (optional, default no ordering)
+     * @throws DocumentException If any is encountered
+     */
+    public static function outputByFields(string $tableName, array $fields, ?FieldMatch $match = null,
+                                          array $orderBy = []): void
+    {
+        Parameters::nameFields($fields);
+        Custom::outputJsonArray(Query\Find::byFields($tableName, $fields, $match) . Query::orderBy($orderBy),
+            Parameters::addFields($fields, []));
+    }
+
+    /**
+     * Output JSON documents via a JSON containment query (`@>`; PostgreSQL only)
+     *
+     * @param string $tableName The name of the table from which documents should be retrieved
+     * @param mixed[]|object $criteria The criteria for the JSON containment query
+     * @param Field[] $orderBy Fields by which the results should be ordered (optional, default no ordering)
+     * @throws DocumentException If the database mode is not PostgreSQL, or if an error occurs
+     */
+    public static function outputByContains(string $tableName, array|object $criteria, array $orderBy = []): void
+    {
+        Custom::outputJsonArray(Query\Find::byContains($tableName) . Query::orderBy($orderBy),
+            Parameters::json(':criteria', $criteria));
+    }
+
+    /**
+     * Output JSON documents via a JSON Path match query (`@?`; PostgreSQL only)
+     *
+     * @param string $tableName The name of the table from which documents should be retrieved
+     * @param string $path The JSON Path match string
+     * @param Field[] $orderBy Fields by which the results should be ordered (optional, default no ordering)
+     * @throws DocumentException If the database mode is not PostgreSQL, or if an error occurs
+     */
+    public static function outputByJsonPath(string $tableName, string $path, array $orderBy = []): void
+    {
+        Custom::outputJsonArray(Query\Find::byJsonPath($tableName) . Query::orderBy($orderBy), [':path' => $path]);
+    }
+
+    /**
+     * Output JSON documents via a comparison on JSON fields, returning only the first result
+     *
+     * @param string $tableName The table from which the document should be retrieved
+     * @param Field[] $fields The field comparison to match
+     * @param FieldMatch|null $match How to handle multiple conditions (optional; defaults to All)
+     * @param Field[] $orderBy Fields by which the results should be ordered (optional, default no ordering)
+     * @throws DocumentException If any is encountered
+     */
+    public static function outputFirstByFields(string $tableName, array $fields, ?FieldMatch $match = null,
+                                               array $orderBy = []): void
+    {
+        echo self::firstByFields($tableName, $fields, $match, $orderBy);
+    }
+
+    /**
+     * Output JSON documents via a JSON containment query (`@>`), returning only the first result (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table from which documents should be retrieved
+     * @param mixed[]|object $criteria The criteria for the JSON containment query
+     * @param Field[] $orderBy Fields by which the results should be ordered (optional, default no ordering)
+     * @throws DocumentException If the database mode is not PostgreSQL, or if an error occurs
+     */
+    public static function outputFirstByContains(string $tableName, array|object $criteria, array $orderBy = []): void
+    {
+        echo self::firstByContains($tableName, $criteria, $orderBy);
+    }
+
+    /**
+     * Output JSON documents via a JSON Path match query (`@?`), returning only the first result (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table from which documents should be retrieved
+     * @param string $path The JSON Path match string
+     * @param Field[] $orderBy Fields by which the results should be ordered (optional, default no ordering)
+     * @throws DocumentException If the database mode is not PostgreSQL, or if an error occurs
+     */
+    public static function outputFirstByJsonPath(string $tableName, string $path, array $orderBy = []): void
+    {
+        echo self::firstByJsonPath($tableName, $path, $orderBy);
+    }
+
+    /**
+     * Set the content type of this page's output to JSON
+     */
+    public static function setContentType(): void
+    {
+        header('Content-Type: application/json; charset=UTF-8');
+    }
+}

test_all.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+export PDO_DOC_PGSQL_HOST=localhost:8301
+PG_VERSIONS=('13' '14' '15' '16' 'latest')
+
+for PG_VERSION in "${PG_VERSIONS[@]}"
+do
+  echo Starting PostgreSQL:$PG_VERSION
+  docker run -d -p 8301:5432 --name pg_test -e POSTGRES_PASSWORD=postgres postgres:$PG_VERSION
+  sleep 4
+  if [ "$PG_VERSION" = "latest" ]; then
+    echo Testing SQLite and PostgreSQL...
+    ./vendor/bin/pest --testdox-text $1-tests.txt tests
+  else
+    echo Testing PostgreSQL v$PG_VERSION...
+    ./vendor/bin/pest --testdox-text $1-pg$PG_VERSION-tests.txt tests/Integration/PostgreSQL
+  fi
+  docker stop pg_test
+  sleep 2
+  docker rm pg_test
+done
+
+cd .. || exit

tests/Integration/DocumentTestCase.php

@@ -0,0 +1,37 @@
+<?php
+/**
+ * @author Daniel J. Summers <daniel@bitbadger.solutions>
+ * @license MIT
+ */
+
+declare(strict_types=1);
+
+namespace Test\Integration;
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Base test case class for document integration tests
+ */
+class DocumentTestCase extends TestCase
+{
+    /**
+     * Clear the output buffer
+     */
+    public function clearBuffer(): void
+    {
+        ob_clean();
+        ob_start();
+    }
+
+    /**
+     * Get the contents of the output buffer and end buffering
+     *
+     * @return string The contents of the output buffer
+     */
+    public function getBufferContents(): string {
+        $contents = ob_get_contents();
+        ob_end_clean();
+        return $contents;
+    }
+}

tests/Integration/PgIntegrationTest.php

@@ -11,13 +11,12 @@ namespace Test\Integration;
 
 use BitBadger\PDODocument\{Configuration, Custom, Delete, DocumentException, Field};
 use BitBadger\PDODocument\Mapper\ExistsMapper;
-use PHPUnit\Framework\TestCase;
 use Test\Integration\PostgreSQL\ThrowawayDb;
 
 /**
  * Integration Test Class wrapper for PostgreSQL integration tests
  */
-class PgIntegrationTest extends TestCase
+class PgIntegrationTest extends DocumentTestCase
 {
     /** @var string Database name for throwaway database */
     static private string $dbName = '';

tests/Integration/PostgreSQL/CustomTest.php

@@ -65,6 +65,30 @@ describe('::array()', function () {
     });
 });
 
+describe('::jsonArray()', function () {
+    test('returns non-empty array when data found', function () {
+        expect(Custom::jsonArray(Query::selectFromTable(ThrowawayDb::TABLE) . " WHERE data->>'sub' IS NOT NULL", []))
+            ->toContain('[{', '},{', '}]');
+    });
+    test('returns empty array when no data found', function () {
+        expect(Custom::jsonArray(Query::selectFromTable(ThrowawayDb::TABLE) . " WHERE data->>'nothing' = '7'", []))
+            ->toBe('[]');
+    });
+});
+
+describe('::outputJsonArray()', function () {
+    test('outputs non-empty array when data found', function () {
+        $this->clearBuffer();
+        Custom::outputJsonArray(Query::selectFromTable(ThrowawayDb::TABLE) . " WHERE data->>'sub' IS NOT NULL", []);
+        expect($this->getBufferContents())->toContain('[{', '},{', '}]');
+    });
+    test('outputs empty array when no data found', function () {
+        $this->clearBuffer();
+        Custom::outputJsonArray(Query::selectFromTable(ThrowawayDb::TABLE) . " WHERE data->>'nothing' = '7'", []);
+        expect($this->getBufferContents())->toBe('[]');
+    });
+});
+
 describe('::single()', function () {
     test('returns a document when one is found', function () {
         expect(Custom::single('SELECT data FROM ' . ThrowawayDb::TABLE . " WHERE data->>'id' = :id", [':id' => 'one'],
@@ -79,6 +103,19 @@ describe('::single()', function () {
     });
 });
 
+describe('::jsonSingle()', function () {
+    test('returns a document when one is found', function () {
+        expect(Custom::jsonSingle('SELECT data FROM ' . ThrowawayDb::TABLE . " WHERE data->>'id' = :id",
+            [':id' => 'one']))
+            ->toStartWith('{"id":')->toContain('"one",')->toEndWith('}');
+    });
+    test('returns no document when one is not found', function () {
+        expect(Custom::jsonSingle('SELECT data FROM ' . ThrowawayDb::TABLE . " WHERE data->>'id' = :id",
+            [':id' => 'eighty']))
+            ->toBe('{}');
+    });
+});
+
 describe('::nonQuery()', function () {
     test('works when documents match the WHERE clause', function () {
         Custom::nonQuery('DELETE FROM ' . ThrowawayDb::TABLE, []);

tests/Integration/PostgreSQL/JsonTest.php

@@ -0,0 +1,410 @@
+<?php
+/**
+ * @author Daniel J. Summers <daniel@bitbadger.solutions>
+ * @license MIT
+ */
+
+declare(strict_types=1);
+
+use BitBadger\PDODocument\{Custom, Delete, Document, Field, FieldMatch, Json};
+use Test\Integration\ArrayDocument;
+use Test\Integration\PostgreSQL\ThrowawayDb;
+
+pest()->group('integration', 'postgresql');
+
+// NOTE: PostgreSQL's `JSONB` type stores JSON in a binary representation which is more easily indexed and stored. One
+//       side effect of this is that the document returned may not have fields in the same order as the document which
+//       was originally stored. The ID will always be first, though, so these tests check for presence of IDs, sorting
+//       by IDs, etc., instead of checking the entire JSON string that should be either returned or output.
+
+/**
+ * Expect document ordering by verifying the index of IDs against others
+ *
+ * @param string $json The JSON string to be searched
+ * @param array $ids The IDs to be verified
+ */
+function expect_doc_order(string $json, array $ids): void
+{
+    for ($idx = 0; $idx < sizeof($ids) - 1; $idx++) {
+        expect(strpos($json, '"' . $ids[$idx] . '",'))
+            ->toBeLessThan(strpos($json, '"' . $ids[$idx + 1] . '",'),
+                "ID $ids[$idx] should have occurred before ID {$ids[$idx + 1]} in JSON $json");
+    }
+}
+
+/**
+ * Expect to find one of several document IDs in the given JSON
+ * @param string $json The JSON string to be searched
+ * @param string ...$ids One or more IDs to be searched
+ */
+function expect_any(string $json, string... $ids): void
+{
+    $exists = false;
+    foreach ($ids as $it) {
+        $exists = strpos($json, '"id": "' . $it . '",') >= 0;
+        if ($exists) break;
+    }
+    expect($exists)->toBeTrue('Could not find any of IDs [' . implode(', ', $ids) . "] in $json");
+}
+
+describe('::all()', function () {
+    test('retrieves data', function () {
+        expect(Json::all(ThrowawayDb::TABLE))
+            ->toContain('{"id": "one",', '{"id": "two",', '{"id": "three",', '{"id": "four",', '{"id": "five",');
+    });
+    test('sorts data ascending', function () {
+        expect_doc_order(Json::all(ThrowawayDb::TABLE, [Field::named('id')]), ['five', 'four', 'one', 'three', 'two']);
+    });
+    test('sorts data descending', function () {
+        expect_doc_order(Json::all(ThrowawayDb::TABLE, [Field::named('id DESC')]),
+            ['two', 'three', 'one', 'four', 'five']);
+    });
+    test('sorts data numerically', function () {
+        expect_doc_order(
+            Json::all(ThrowawayDb::TABLE, [Field::named('sub.foo NULLS LAST'), Field::named('n:num_value')]),
+            ['two', 'four', 'one', 'three', 'five']);
+    });
+    test('retrieves empty results', function () {
+        Custom::nonQuery('DELETE FROM ' . ThrowawayDb::TABLE, []);
+        expect(Json::all(ThrowawayDb::TABLE))->toBe('[]');
+    });
+});
+
+describe('::byId()', function () {
+    test('retrieves a document via string ID', function () {
+        expect(Json::byId(ThrowawayDb::TABLE, 'two'))->toStartWith('{"id": "two",')->toEndWith('}');
+    });
+    test('retrieves a document via numeric ID', function () {
+        Delete::byFields(ThrowawayDb::TABLE, [Field::notExists('absent')]);
+        Document::insert(ThrowawayDb::TABLE, ['id' => 18, 'value' => 'howdy']);
+        expect(Json::byId(ThrowawayDb::TABLE, 18))->toStartWith('{"id": 18,')->toEndWith('}');
+    });
+    test('returns "{}" when a document is not found', function () {
+        expect(Json::byId(ThrowawayDb::TABLE, 'seventy-five'))->toBe('{}');
+    });
+});
+
+describe('::byFields()', function () {
+    test('retrieves matching documents', function () {
+        expect(
+            Json::byFields(ThrowawayDb::TABLE, [Field::in('value', ['blue', 'purple']), Field::exists('sub')],
+                FieldMatch::All))
+            ->toStartWith('[{"id": "four",')->toEndWith('}]');
+    });
+    test('retrieves ordered matching documents', function () {
+        expect_doc_order(
+            Json::byFields(ThrowawayDb::TABLE, [Field::equal('value', 'purple')], FieldMatch::All,
+                [Field::named('id')]),
+            ['five', 'four']);
+    });
+    test('retrieves documents matching a numeric IN clause', function () {
+        expect(Json::byFields(ThrowawayDb::TABLE, [Field::in('num_value', [2, 4, 6, 8])]))
+            ->toStartWith('[{"id": "three",')->toEndWith('}]');
+    });
+    test('returns an empty array when no matching documents are found', function () {
+        expect(Json::byFields(ThrowawayDb::TABLE, [Field::greater('num_value', 100)]))->toBe('[]');
+    });
+    test('retrieves documents matching an inArray condition', function () {
+        Delete::byFields(ThrowawayDb::TABLE, [Field::notExists('absentField')]);
+        foreach (ArrayDocument::testDocuments() as $doc) Document::insert(ThrowawayDb::TABLE, $doc);
+        expect(Json::byFields(ThrowawayDb::TABLE, [Field::inArray('values', ThrowawayDb::TABLE, ['c'])]))
+            ->toStartWith('[')->toContain('{"id": "first",')->toContain('{"id": "second",')->toEndWith(']');
+    });
+    test('returns an empty array when no documents match an inArray condition', function () {
+        Delete::byFields(ThrowawayDb::TABLE, [Field::notExists('absentField')]);
+        foreach (ArrayDocument::testDocuments() as $doc) Document::insert(ThrowawayDb::TABLE, $doc);
+        expect(Json::byFields(ThrowawayDb::TABLE, [Field::inArray('values', ThrowawayDb::TABLE, ['j'])]))
+            ->toBe('[]');
+    });
+});
+
+describe('::byContains()', function () {
+    test('retrieves matching documents', function () {
+        expect(Json::byContains(ThrowawayDb::TABLE, ['value' => 'purple']))
+            ->toStartWith('[')->toContain('{"id": "four",', '{"id": "five",')->toEndWith(']');
+    });
+    test('retrieves ordered matching documents', function () {
+        expect_doc_order(Json::byContains(ThrowawayDb::TABLE, ['sub' => ['foo' => 'green']], [Field::named('value')]),
+            ['two', 'four']);
+    });
+    test('returns an empty array when no documents match', function () {
+        expect(Json::byContains(ThrowawayDb::TABLE, ['value' => 'indigo']))->toBe('[]');
+    });
+});
+
+describe('::byJsonPath()', function () {
+    test('retrieves matching documents', function () {
+        expect(Json::byJsonPath(ThrowawayDb::TABLE, '$.num_value ? (@ > 10)'))
+            ->toStartWith('[')->toContain('{"id": "four",', '{"id": "five",')->toEndWith(']');
+    });
+    test('retrieves ordered matching documents', function () {
+        expect_doc_order(Json::byJsonPath(ThrowawayDb::TABLE, '$.num_value ? (@ > 10)', [Field::named('id')]),
+            ['five', 'four']);
+    });
+    test('returns an empty array when no documents match', function () {
+        expect(Json::byJsonPath(ThrowawayDb::TABLE, '$.num_value ? (@ > 100)'))->toBe('[]');
+    });
+});
+
+describe('::firstByFields()', function () {
+    test('retrieves a matching document', function () {
+        expect(Json::firstByFields(ThrowawayDb::TABLE, [Field::equal('value', 'another')]))
+            ->toStartWith('{"id": "two",')->toEndWith('}');
+    });
+    test('retrieves a document for multiple results', function () {
+        $doc = Json::firstByFields(ThrowawayDb::TABLE, [Field::equal('sub.foo', 'green')]);
+        expect($doc)->toStartWith('{')->toEndWith('}');
+        expect_any($doc, 'two', 'four');
+    });
+    test('retrieves a document for multiple ordered results', function () {
+        expect(
+            Json::firstByFields(ThrowawayDb::TABLE, [Field::equal('sub.foo', 'green')],
+                orderBy: [Field::named('n:num_value DESC')]))
+            ->toStartWith('{"id": "four",')->toEndWith('}');
+    });
+    test('returns "{}" when no documents match', function () {
+        expect(Json::firstByFields(ThrowawayDb::TABLE, [Field::equal('value', 'absent')]))->toBe('{}');
+    });
+});
+
+describe('::firstByContains()', function () {
+    test('retrieves a matching document', function () {
+        expect(Json::firstByContains(ThrowawayDb::TABLE, ['value' => 'FIRST!']))
+            ->toStartWith('{"id": "one",')->toEndWith('}');
+    });
+    test('retrieves a document for multiple results', function () {
+        $doc = Json::firstByContains(ThrowawayDb::TABLE, ['value' => 'purple']);
+        expect($doc)->toStartWith('{')->toEndWith('}');
+        expect_any($doc, 'four', 'five');
+    });
+    test('retrieves a document for multiple ordered results', function () {
+        expect(Json::firstByContains(ThrowawayDb::TABLE, ['value' => 'purple'], [Field::named('sub.bar NULLS FIRST')]))
+            ->toStartWith('{"id": "five",')->toEndWith('}');
+    });
+    test('returns "{}" when no documents match', function () {
+        expect(Json::firstByContains(ThrowawayDb::TABLE, ['value' => 'indigo']))->toBe('{}');
+    });
+});
+
+describe('::firstByJsonPath()', function () {
+    test('retrieves a matching document', function () {
+        expect(Json::firstByJsonPath(ThrowawayDb::TABLE, '$.num_value ? (@ == 10)'))
+            ->toStartWith('{"id": "two",')->toEndWith('}');
+    });
+    test('retrieves a document for multiple results', function () {
+        $doc = Json::firstByJsonPath(ThrowawayDb::TABLE, '$.num_value ? (@ > 10)');
+        expect($doc)->toStartWith('{')->toEndWith('}');
+        expect_any($doc, 'four', 'five');
+    });
+    test('retrieves a document for multiple ordered results', function () {
+        expect(Json::firstByJsonPath(ThrowawayDb::TABLE, '$.num_value ? (@ > 10)', [Field::named('id DESC')]))
+            ->toStartWith('{"id": "four",')->toEndWith('}');
+    });
+    test('returns "{}" when no documents match', function () {
+        expect(Json::firstByJsonPath(ThrowawayDb::TABLE, '$.num_value ? (@ > 100)'))->toBe('{}');
+    });
+});
+
+describe('::outputAll()', function () {
+    test('outputs data', function () {
+        $this->clearBuffer();
+        Json::outputAll(ThrowawayDb::TABLE);
+        expect($this->getBufferContents())
+            ->toContain('{"id": "one",', '{"id": "two",', '{"id": "three",', '{"id": "four",', '{"id": "five",');
+    });
+    test('sorts data ascending', function () {
+        $this->clearBuffer();
+        Json::outputAll(ThrowawayDb::TABLE, [Field::named('id')]);
+        expect_doc_order($this->getBufferContents(), ['five', 'four', 'one', 'three', 'two']);
+    });
+    test('sorts data descending', function () {
+        $this->clearBuffer();
+        Json::outputAll(ThrowawayDb::TABLE, [Field::named('id DESC')]);
+        expect_doc_order($this->getBufferContents(), ['two', 'three', 'one', 'four', 'five']);
+    });
+    test('sorts data numerically', function () {
+        $this->clearBuffer();
+        Json::outputAll(ThrowawayDb::TABLE, [Field::named('sub.foo NULLS LAST'), Field::named('n:num_value')]);
+        expect_doc_order($this->getBufferContents(), ['two', 'four', 'one', 'three', 'five']);
+    });
+    test('outputs empty results', function () {
+        $this->clearBuffer();
+        Custom::nonQuery('DELETE FROM ' . ThrowawayDb::TABLE, []);
+        Json::outputAll(ThrowawayDb::TABLE);
+        expect($this->getBufferContents())->toBe('[]');
+    });
+});
+
+describe('::outputById()', function () {
+    test('outputs a document via string ID', function () {
+        $this->clearBuffer();
+        Json::outputById(ThrowawayDb::TABLE, 'two');
+        expect($this->getBufferContents())->toStartWith('{"id": "two",')->toEndWith('}');
+    });
+    test('outputs a document via numeric ID', function () {
+        $this->clearBuffer();
+        Delete::byFields(ThrowawayDb::TABLE, [Field::notExists('absent')]);
+        Document::insert(ThrowawayDb::TABLE, ['id' => 18, 'value' => 'howdy']);
+        Json::outputById(ThrowawayDb::TABLE, 18);
+        expect($this->getBufferContents())->toStartWith('{"id": 18,')->toEndWith('}');
+    });
+    test('outputs "{}" when a document is not found', function () {
+        $this->clearBuffer();
+        Json::outputById(ThrowawayDb::TABLE, 'seventy-five');
+        expect($this->getBufferContents())->toBe('{}');
+    });
+});
+
+describe('::outputByFields()', function () {
+    test('outputs matching documents', function () {
+        $this->clearBuffer();
+        Json::outputByFields(ThrowawayDb::TABLE, [Field::in('value', ['blue', 'purple']), Field::exists('sub')],
+            FieldMatch::All);
+        expect($this->getBufferContents())->toStartWith('[{"id": "four",')->toEndWith('}]');
+    });
+    test('outputs ordered matching documents', function () {
+        $this->clearBuffer();
+        Json::outputByFields(ThrowawayDb::TABLE, [Field::equal('value', 'purple')], FieldMatch::All,
+            [Field::named('id')]);
+        expect_doc_order($this->getBufferContents(), ['five', 'four']);
+    });
+    test('outputs documents matching a numeric IN clause', function () {
+        $this->clearBuffer();
+        Json::outputByFields(ThrowawayDb::TABLE, [Field::in('num_value', [2, 4, 6, 8])]);
+        expect($this->getBufferContents())->toStartWith('[{"id": "three",')->toEndWith('}]');
+    });
+    test('outputs an empty array when no matching documents are found', function () {
+        $this->clearBuffer();
+        Json::outputByFields(ThrowawayDb::TABLE, [Field::greater('num_value', 100)]);
+        expect($this->getBufferContents())->toBe('[]');
+    });
+    test('outputs documents matching an inArray condition', function () {
+        $this->clearBuffer();
+        Delete::byFields(ThrowawayDb::TABLE, [Field::notExists('absentField')]);
+        foreach (ArrayDocument::testDocuments() as $doc) Document::insert(ThrowawayDb::TABLE, $doc);
+        Json::outputByFields(ThrowawayDb::TABLE, [Field::inArray('values', ThrowawayDb::TABLE, ['c'])]);
+        expect($this->getBufferContents())
+            ->toStartWith('[')->toContain('{"id": "first",', '{"id": "second",')->toEndWith(']');
+    });
+    test('outputs an empty array when no documents match an inArray condition', function () {
+        $this->clearBuffer();
+        Delete::byFields(ThrowawayDb::TABLE, [Field::notExists('absentField')]);
+        foreach (ArrayDocument::testDocuments() as $doc) Document::insert(ThrowawayDb::TABLE, $doc);
+        Json::outputByFields(ThrowawayDb::TABLE, [Field::inArray('values', ThrowawayDb::TABLE, ['j'])]);
+        expect($this->getBufferContents())->toBe('[]');
+    });
+});
+
+describe('::outputByContains()', function () {
+    test('outputs matching documents', function () {
+        $this->clearBuffer();
+        Json::outputByContains(ThrowawayDb::TABLE, ['value' => 'purple']);
+        expect($this->getBufferContents())
+            ->toStartWith('[')->toContain('{"id": "four",', '{"id": "five",')->toEndWith(']');
+    });
+    test('outputs ordered matching documents', function () {
+        $this->clearBuffer();
+        Json::outputByContains(ThrowawayDb::TABLE, ['sub' => ['foo' => 'green']], [Field::named('value')]);
+        expect_doc_order($this->getBufferContents(), ['two', 'four']);
+    });
+    test('outputs an empty array when no documents match', function () {
+        $this->clearBuffer();
+        Json::outputByContains(ThrowawayDb::TABLE, ['value' => 'indigo']);
+        expect($this->getBufferContents())->toBe('[]');
+    });
+});
+
+describe('::outputByJsonPath()', function () {
+    test('outputs matching documents', function () {
+        $this->clearBuffer();
+        Json::outputByJsonPath(ThrowawayDb::TABLE, '$.num_value ? (@ > 10)');
+        expect($this->getBufferContents())
+            ->toStartWith('[')->toContain('{"id": "four",', '{"id": "five",')->toEndWith(']');
+    });
+    test('outputs ordered matching documents', function () {
+        $this->clearBuffer();
+        Json::outputByJsonPath(ThrowawayDb::TABLE, '$.num_value ? (@ > 10)', [Field::named('id')]);
+        expect_doc_order($this->getBufferContents(), ['five', 'four']);
+    });
+    test('outputs an empty array when no documents match', function () {
+        $this->clearBuffer();
+        Json::outputByJsonPath(ThrowawayDb::TABLE, '$.num_value ? (@ > 100)');
+        expect($this->getBufferContents())->toBe('[]');
+    });
+});
+
+describe('::outputFirstByFields()', function () {
+    test('outputs a matching document', function () {
+        $this->clearBuffer();
+        Json::outputFirstByFields(ThrowawayDb::TABLE, [Field::equal('value', 'another')]);
+        expect($this->getBufferContents())->toStartWith('{"id": "two",')->toEndWith('}');
+    });
+    test('outputs a document for multiple results', function () {
+        $this->clearBuffer();
+        Json::outputFirstByFields(ThrowawayDb::TABLE, [Field::equal('sub.foo', 'green')]);
+        $doc = $this->getBufferContents();
+        expect($doc)->toStartWith('{')->toEndWith('}');
+        expect_any($doc, 'two', 'four');
+    });
+    test('outputs a document for multiple ordered results', function () {
+        $this->clearBuffer();
+        Json::outputFirstByFields(ThrowawayDb::TABLE, [Field::equal('sub.foo', 'green')],
+            orderBy: [Field::named('n:num_value DESC')]);
+        expect($this->getBufferContents())->toStartWith('{"id": "four",')->toEndWith('}');
+    });
+    test('outputs "{}" when no documents match', function () {
+        $this->clearBuffer();
+        Json::outputFirstByFields(ThrowawayDb::TABLE, [Field::equal('value', 'absent')]);
+        expect($this->getBufferContents())->toBe('{}');
+    });
+});
+
+describe('::outputFirstByContains()', function () {
+    test('outputs a matching document', function () {
+        $this->clearBuffer();
+        Json::outputFirstByContains(ThrowawayDb::TABLE, ['value' => 'FIRST!']);
+        expect($this->getBufferContents())->toStartWith('{"id": "one",')->toEndWith('}');
+    });
+    test('outputs a document for multiple results', function () {
+        $this->clearBuffer();
+        Json::outputFirstByContains(ThrowawayDb::TABLE, ['value' => 'purple']);
+        $doc = $this->getBufferContents();
+        expect($doc)->toStartWith('{')->toEndWith('}');
+        expect_any($doc, 'four', 'five');
+    });
+    test('outputs a document for multiple ordered results', function () {
+        $this->clearBuffer();
+        Json::outputFirstByContains(ThrowawayDb::TABLE, ['value' => 'purple'], [Field::named('sub.bar NULLS FIRST')]);
+        expect($this->getBufferContents())->toStartWith('{"id": "five",')->toEndWith('}');
+    });
+    test('outputs "{}" when no documents match', function () {
+        $this->clearBuffer();
+        Json::outputFirstByContains(ThrowawayDb::TABLE, ['value' => 'indigo']);
+        expect($this->getBufferContents())->toBe('{}');
+    });
+});
+
+describe('::outputFirstByJsonPath()', function () {
+    test('outputs a matching document', function () {
+        $this->clearBuffer();
+        Json::outputFirstByJsonPath(ThrowawayDb::TABLE, '$.num_value ? (@ == 10)');
+        expect($this->getBufferContents())->toStartWith('{"id": "two",')->toEndWith('}');
+    });
+    test('outputs a document for multiple results', function () {
+        $this->clearBuffer();
+        Json::outputFirstByJsonPath(ThrowawayDb::TABLE, '$.num_value ? (@ > 10)');
+        $doc = $this->getBufferContents();
+        expect($doc)->toStartWith('{')->toEndWith('}');
+        expect_any($doc, 'four', 'five');
+    });
+    test('outputs a document for multiple ordered results', function () {
+        $this->clearBuffer();
+        Json::outputFirstByJsonPath(ThrowawayDb::TABLE, '$.num_value ? (@ > 10)', [Field::named('id DESC')]);
+        expect($this->getBufferContents())->toStartWith('{"id": "four",')->toEndWith('}');
+    });
+    test('outputs "{}" when no documents match', function () {
+        $this->clearBuffer();
+        Json::outputFirstByJsonPath(ThrowawayDb::TABLE, '$.num_value ? (@ > 100)');
+        expect($this->getBufferContents())->toBe('{}');
+    });
+});

tests/Integration/SQLite/CustomTest.php

@@ -63,6 +63,30 @@ describe('::array()', function () {
     });
 });
 
+describe('::jsonArray()', function () {
+    test('returns non-empty array when data found', function () {
+        expect(Custom::jsonArray(Query::selectFromTable(ThrowawayDb::TABLE) . " WHERE data->>'sub' IS NOT NULL", []))
+            ->toContain('[{', '},{', '}]');
+    });
+    test('returns empty array when no data found', function () {
+        expect(Custom::jsonArray(Query::selectFromTable(ThrowawayDb::TABLE) . " WHERE data->>'nothing' = '7'", []))
+            ->toBe('[]');
+    });
+});
+
+describe('::outputJsonArray()', function () {
+    test('outputs non-empty array when data found', function () {
+        $this->clearBuffer();
+        Custom::outputJsonArray(Query::selectFromTable(ThrowawayDb::TABLE) . " WHERE data->>'sub' IS NOT NULL", []);
+        expect($this->getBufferContents())->toContain('[{', '},{', '}]');
+    });
+    test('outputs empty array when no data found', function () {
+        $this->clearBuffer();
+        Custom::outputJsonArray(Query::selectFromTable(ThrowawayDb::TABLE) . " WHERE data->>'nothing' = '7'", []);
+        expect($this->getBufferContents())->toBe('[]');
+    });
+});
+
 describe('::single()', function () {
     test('returns a document when one is found', function () {
         expect(Custom::single('SELECT data FROM ' . ThrowawayDb::TABLE . " WHERE data->>'id' = :id", [':id' => 'one'],
@@ -76,6 +100,19 @@ describe('::single()', function () {
     });
 });
 
+describe('::jsonSingle()', function () {
+    test('returns a document when one is found', function () {
+        expect(Custom::jsonSingle('SELECT data FROM ' . ThrowawayDb::TABLE . " WHERE data->>'id' = :id",
+            [':id' => 'one']))
+            ->toStartWith('{"id":"one",')->toEndWith('}');
+    });
+    test('returns no document when one is not found', function () {
+        expect(Custom::jsonSingle('SELECT data FROM ' . ThrowawayDb::TABLE . " WHERE data->>'id' = :id",
+            [':id' => 'eighty']))
+            ->toBe('{}');
+    });
+});
+
 describe('::nonQuery()', function () {
     test('works when documents match the WHERE clause', function () {
         Custom::nonQuery('DELETE FROM ' . ThrowawayDb::TABLE, []);

tests/Integration/SQLite/JsonTest.php

@@ -0,0 +1,272 @@
+<?php
+/**
+ * @author Daniel J. Summers <daniel@bitbadger.solutions>
+ * @license MIT
+ */
+
+declare(strict_types=1);
+
+use BitBadger\PDODocument\{Custom, Delete, Document, DocumentException, Field, FieldMatch, Json};
+use Test\Integration\ArrayDocument;
+use Test\Integration\SQLite\ThrowawayDb;
+
+pest()->group('integration', 'sqlite');
+
+/** JSON for document ID "one" */
+const ONE = '{"id":"one","value":"FIRST!","num_value":0,"sub":null}';
+
+/** JSON for document ID "two" */
+const TWO = '{"id":"two","value":"another","num_value":10,"sub":{"foo":"green","bar":"blue"}}';
+
+/** JSON for document ID "three" */
+const THREE = '{"id":"three","value":"","num_value":4,"sub":null}';
+
+/** JSON for document ID "four" */
+const FOUR = '{"id":"four","value":"purple","num_value":17,"sub":{"foo":"green","bar":"red"}}';
+
+/** JSON for document ID "five" */
+const FIVE = '{"id":"five","value":"purple","num_value":18,"sub":null}';
+
+describe('::all()', function () {
+    test('retrieves data', function () {
+        expect(Json::all(ThrowawayDb::TABLE))->toStartWith('[')->toContain(ONE, TWO, THREE, FOUR, FIVE)->toEndWith(']');
+    });
+    test('sorts data ascending', function () {
+        expect(Json::all(ThrowawayDb::TABLE, [Field::named('id')]))
+            ->toBe('[' . implode(',', [FIVE, FOUR, ONE, THREE, TWO]) . ']');
+    });
+    test('sorts data descending', function () {
+        expect(Json::all(ThrowawayDb::TABLE, [Field::named('id DESC')]))
+            ->toBe('[' . implode(',', [TWO, THREE, ONE, FOUR, FIVE]) . ']');
+    });
+    test('sorts data numerically', function () {
+        expect(Json::all(ThrowawayDb::TABLE, [Field::named('sub.foo NULLS LAST'), Field::named('n:num_value')]))
+            ->toBe('[' . implode(',', [TWO, FOUR, ONE, THREE, FIVE]) . ']');
+    });
+    test('returns an empty array when no data exists', function () {
+        Custom::nonQuery('DELETE FROM ' . ThrowawayDb::TABLE, []);
+        expect(Json::all(ThrowawayDb::TABLE))->toBe('[]');
+    });
+});
+
+describe('::byId()', function () {
+    test('returns a document when it exists', function () {
+        expect(Json::byId(ThrowawayDb::TABLE, 'two'))->toBe(TWO);
+    });
+    test('returns a document with a numeric ID', function () {
+        Document::insert(ThrowawayDb::TABLE, ['id' => 18, 'value' => 'howdy']);
+        expect(Json::byId(ThrowawayDb::TABLE, 18))->toBe('{"id":18,"value":"howdy"}');
+    });
+    test('returns "{}" when no document exists', function () {
+        expect(Json::byId(ThrowawayDb::TABLE, 'seventy-five'))->toBe('{}');
+    });
+});
+
+describe('::byFields()', function () {
+    test('returns matching documents', function () {
+        expect(Json::byFields(ThrowawayDb::TABLE, [Field::in('value', ['blue', 'purple']), Field::exists('sub')],
+            FieldMatch::All))
+            ->toBe('[' . FOUR . ']');
+    });
+    test('returns ordered matching documents', function () {
+        expect(Json::byFields(ThrowawayDb::TABLE, [Field::equal('value', 'purple')], FieldMatch::All,
+            [Field::named('id')]))
+            ->toBe('[' . implode(',', [FIVE, FOUR]) . ']');
+    });
+    test('returns documents matching numeric IN clause', function () {
+        expect(Json::byFields(ThrowawayDb::TABLE, [Field::in('num_value', [2, 4, 6, 8])]))->toBe('[' . THREE . ']');
+    });
+    test('returns empty array when no documents match', function () {
+        expect(Json::byFields(ThrowawayDb::TABLE, [Field::greater('num_value', 100)]))->toBe('[]');
+    });
+    test('returns matching documents for inArray comparison', function () {
+        Delete::byFields(ThrowawayDb::TABLE, [Field::notExists('absentField')]);
+        foreach (ArrayDocument::testDocuments() as $doc) Document::insert(ThrowawayDb::TABLE, $doc);
+        expect(Json::byFields(ThrowawayDb::TABLE, [Field::inArray('values', ThrowawayDb::TABLE, ['c'])]))
+            ->toBe('[{"id":"first","values":["a","b","c"]},{"id":"second","values":["c","d","e"]}]');
+    });
+    test('returns empty array when no documents match inArray comparison', function () {
+        Delete::byFields(ThrowawayDb::TABLE, [Field::notExists('absentField')]);
+        foreach (ArrayDocument::testDocuments() as $doc) Document::insert(ThrowawayDb::TABLE, $doc);
+        expect(Json::byFields(ThrowawayDb::TABLE, [Field::inArray('values', ThrowawayDb::TABLE, ['j'])]))->toBe('[]');
+    });
+});
+
+describe('::byContains()', function () {
+    test('throws an exception', function () {
+        expect(fn () => Json::byContains('', []))->toThrow(DocumentException::class);
+    });
+});
+
+describe('::byJsonPath()', function () {
+    test('throws an exception', function () {
+        expect(fn () => Json::byJsonPath('', ''))->toThrow(DocumentException::class);
+    });
+});
+
+describe('::firstByFields()', function () {
+    test('returns a matching document', function () {
+        expect(Json::firstByFields(ThrowawayDb::TABLE, [Field::equal('value', 'another')]))->toBe(TWO);
+    });
+    test('returns one of several matching documents', function () {
+        $doc = Json::firstByFields(ThrowawayDb::TABLE, [Field::equal('sub.foo', 'green')]);
+        expect($doc == TWO || $doc == FOUR)->toBeTrue("Document should have been two or four (actual $doc)");
+    });
+    test('returns first of ordered matching documents', function () {
+        expect(Json::firstByFields(ThrowawayDb::TABLE, [Field::equal('sub.foo', 'green')],
+            orderBy: [Field::named('n:num_value DESC')]))
+            ->toBe(FOUR);
+    });
+    test('returns "{}" when no documents match', function () {
+        expect(Json::firstByFields(ThrowawayDb::TABLE, [Field::equal('value', 'absent')]))->toBe('{}');
+    });
+});
+
+describe('::firstByContains()', function () {
+    test('throws an exception', function () {
+        expect(fn () => Json::firstByContains('', []))->toThrow(DocumentException::class);
+    });
+});
+
+describe('::firstByJsonPath()', function () {
+    test('throws an exception', function () {
+        expect(fn () => Json::firstByJsonPath('', ''))->toThrow(DocumentException::class);
+    });
+});
+
+describe('::outputAll()', function () {
+    test('outputs data', function () {
+        $this->clearBuffer();
+        Json::outputAll(ThrowawayDb::TABLE);
+        expect($this->getBufferContents())->toStartWith('[')->toContain(ONE, TWO, THREE, FOUR, FIVE)->toEndWith(']');
+    });
+    test('sorts data ascending', function () {
+        $this->clearBuffer();
+        Json::outputAll(ThrowawayDb::TABLE, [Field::named('id')]);
+        expect($this->getBufferContents())->toBe('[' . implode(',', [FIVE, FOUR, ONE, THREE, TWO]) . ']');
+    });
+    test('sorts data descending', function () {
+        $this->clearBuffer();
+        Json::outputAll(ThrowawayDb::TABLE, [Field::named('id DESC')]);
+        expect($this->getBufferContents())->toBe('[' . implode(',', [TWO, THREE, ONE, FOUR, FIVE]) . ']');
+    });
+    test('sorts data numerically', function () {
+        $this->clearBuffer();
+        Json::outputAll(ThrowawayDb::TABLE, [Field::named('sub.foo NULLS LAST'), Field::named('n:num_value')]);
+        expect($this->getBufferContents())->toBe('[' . implode(',', [TWO, FOUR, ONE, THREE, FIVE]) . ']');
+    });
+    test('outputs an empty array when no data exists', function () {
+        $this->clearBuffer();
+        Custom::nonQuery('DELETE FROM ' . ThrowawayDb::TABLE, []);
+        Json::outputAll(ThrowawayDb::TABLE);
+        expect($this->getBufferContents())->toBe('[]');
+    });
+});
+
+describe('::outputById()', function () {
+    test('outputs a document when it exists', function () {
+        $this->clearBuffer();
+        Json::outputById(ThrowawayDb::TABLE, 'two');
+        expect($this->getBufferContents())->toBe(TWO);
+    });
+    test('outputs a document with a numeric ID', function () {
+        $this->clearBuffer();
+        Document::insert(ThrowawayDb::TABLE, ['id' => 18, 'value' => 'howdy']);
+        Json::outputById(ThrowawayDb::TABLE, 18);
+        expect($this->getBufferContents())->toBe('{"id":18,"value":"howdy"}');
+    });
+    test('outputs "{}" when no document exists', function () {
+        $this->clearBuffer();
+        Json::outputById(ThrowawayDb::TABLE, 'seventy-five');
+        expect($this->getBufferContents())->toBe('{}');
+    });
+});
+
+describe('::outputByFields()', function () {
+    test('outputs matching documents', function () {
+        $this->clearBuffer();
+        Json::outputByFields(ThrowawayDb::TABLE, [Field::in('value', ['blue', 'purple']), Field::exists('sub')],
+            FieldMatch::All);
+        expect($this->getBufferContents())->toBe('[' . FOUR . ']');
+    });
+    test('outputs ordered matching documents', function () {
+        $this->clearBuffer();
+        Json::outputByFields(ThrowawayDb::TABLE, [Field::equal('value', 'purple')], FieldMatch::All,
+            [Field::named('id')]);
+        expect($this->getBufferContents())->toBe('[' . implode(',', [FIVE, FOUR]) . ']');
+    });
+    test('outputs documents matching numeric IN clause', function () {
+        $this->clearBuffer();
+        Json::outputByFields(ThrowawayDb::TABLE, [Field::in('num_value', [2, 4, 6, 8])]);
+        expect($this->getBufferContents())->toBe('[' . THREE . ']');
+    });
+    test('outputs empty array when no documents match', function () {
+        $this->clearBuffer();
+        Json::outputByFields(ThrowawayDb::TABLE, [Field::greater('num_value', 100)]);
+        expect($this->getBufferContents())->toBe('[]');
+    });
+    test('outputs matching documents for inArray comparison', function () {
+        $this->clearBuffer();
+        Delete::byFields(ThrowawayDb::TABLE, [Field::notExists('absentField')]);
+        foreach (ArrayDocument::testDocuments() as $doc) Document::insert(ThrowawayDb::TABLE, $doc);
+        Json::outputByFields(ThrowawayDb::TABLE, [Field::inArray('values', ThrowawayDb::TABLE, ['c'])]);
+        expect($this->getBufferContents())
+            ->toBe('[{"id":"first","values":["a","b","c"]},{"id":"second","values":["c","d","e"]}]');
+    });
+    test('outputs empty array when no documents match inArray comparison', function () {
+        $this->clearBuffer();
+        Delete::byFields(ThrowawayDb::TABLE, [Field::notExists('absentField')]);
+        foreach (ArrayDocument::testDocuments() as $doc) Document::insert(ThrowawayDb::TABLE, $doc);
+        Json::outputByFields(ThrowawayDb::TABLE, [Field::inArray('values', ThrowawayDb::TABLE, ['j'])]);
+        expect($this->getBufferContents())->toBe('[]');
+    });
+});
+
+describe('::outputByContains()', function () {
+    test('throws an exception', function () {
+        expect(fn () => Json::outputByContains('', []))->toThrow(DocumentException::class);
+    });
+});
+
+describe('::outputByJsonPath()', function () {
+    test('throws an exception', function () {
+        expect(fn () => Json::outputByJsonPath('', ''))->toThrow(DocumentException::class);
+    });
+});
+
+describe('::outputFirstByFields()', function () {
+    test('outputs a matching document', function () {
+        $this->clearBuffer();
+        Json::outputFirstByFields(ThrowawayDb::TABLE, [Field::equal('value', 'another')]);
+        expect($this->getBufferContents())->toBe(TWO);
+    });
+    test('outputs one of several matching documents', function () {
+        $this->clearBuffer();
+        Json::outputFirstByFields(ThrowawayDb::TABLE, [Field::equal('sub.foo', 'green')]);
+        $doc = $this->getBufferContents();
+        expect($doc == TWO || $doc == FOUR)->toBeTrue("Document should have been two or four (actual $doc)");
+    });
+    test('outputs first of ordered matching documents', function () {
+        $this->clearBuffer();
+        Json::outputFirstByFields(ThrowawayDb::TABLE, [Field::equal('sub.foo', 'green')],
+            orderBy: [Field::named('n:num_value DESC')]);
+        expect($this->getBufferContents())->toBe(FOUR);
+    });
+    test('outputs "{}" when no documents match', function () {
+        $this->clearBuffer();
+        Json::outputFirstByFields(ThrowawayDb::TABLE, [Field::equal('value', 'absent')]);
+        expect($this->getBufferContents())->toBe('{}');
+    });
+});
+
+describe('::outputFirstByContains()', function () {
+    test('throws an exception', function () {
+        expect(fn () => Json::outputFirstByContains('', []))->toThrow(DocumentException::class);
+    });
+});
+
+describe('::outputFirstByJsonPath()', function () {
+    test('throws an exception', function () {
+        expect(fn () => Json::outputFirstByJsonPath('', ''))->toThrow(DocumentException::class);
+    });
+});

tests/Integration/SQLiteIntegrationTest.php

@@ -11,13 +11,12 @@ namespace Test\Integration;
 
 use BitBadger\PDODocument\{Configuration, Custom, Delete, DocumentException, Field};
 use BitBadger\PDODocument\Mapper\ExistsMapper;
-use PHPUnit\Framework\TestCase;
 use Test\Integration\SQLite\ThrowawayDb;
 
 /**
  * Integration Test Class wrapper for SQLite integration tests
  */
-class SQLiteIntegrationTest extends TestCase
+class SQLiteIntegrationTest extends DocumentTestCase
 {
     /** @var string Database name for throwaway database */
     static private string $dbName = '';