diff --git a/tests/Integration/SQLite/JsonTest.php b/tests/Integration/SQLite/JsonTest.php
new file mode 100644
index 0000000..09357ed
--- /dev/null
+++ b/tests/Integration/SQLite/JsonTest.php
@@ -0,0 +1,274 @@
+<?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 () {
+        $doc = Json::firstByFields(ThrowawayDb::TABLE, [Field::equal('sub.foo', 'green')]);
+        expect(array_any([TWO, FOUR], fn($it) => $doc == $it))
+            ->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 = $this->getBufferContents();
+        expect(array_any([TWO, FOUR], fn($it) => $doc == $it))
+            ->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);
+    });
+});