src/Definition.php

@@ -31,4 +31,16 @@ class Definition
     {
         Custom::nonQuery(Query\Definition::ensureIndexOn($tableName, $indexName, $fields), []);
     }
+
+    /**
+     * Create a full-document index on a table (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table on which the document index should be created
+     * @param DocumentIndex $indexType The type of document index to create
+     * @throws DocumentException If the database mode is not PostgreSQL or if an error occurs creating the index
+     */
+    public static function ensureDocumentIndex(string $tableName, DocumentIndex $indexType): void
+    {
+        Custom::nonQuery(Query\Definition::ensureDocumentIndexOn($tableName, $indexType), []);
+    }
 }

src/DocumentIndex.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace BitBadger\PDODocument;
+
+/**
+ * The type of index to generate for the document
+ */
+enum DocumentIndex
+{
+    /** A GIN index with standard operations (all operators supported) */
+    case Full;
+
+    /** A GIN index with JSONPath operations (optimized for @>, @?, @@ operators) */
+    case Optimized;
+}

src/Query.php

@@ -48,6 +48,36 @@ class Query
         return self::whereByFields([Field::EQ(Configuration::$idField, $docId ?? '', $paramName)]);
     }
 
+    /**
+     * Create a WHERE clause fragment to implement a JSON containment query (PostgreSQL only)
+     *
+     * @param string $paramName The name of the parameter (optional; defaults to `:criteria`)
+     * @return string The WHERE clause fragment for a JSON containment query
+     * @throws DocumentException If the database mode is not PostgreSQL
+     */
+    public static function whereDataContains(string $paramName = ':criteria'): string
+    {
+        if (Configuration::$mode <> Mode::PgSQL) {
+            throw new DocumentException('JSON containment is only supported on PostgreSQL');
+        }
+        return "data @> $paramName";
+    }
+
+    /**
+     * Create a WHERE clause fragment to implement a JSON Path match query (PostgreSQL only)
+     *
+     * @param string $paramName The name of the parameter (optional; defaults to `:path`)
+     * @return string The WHERE clause fragment for a JSON Path match query
+     * @throws DocumentException If the database mode is not PostgreSQL
+     */
+    public static function whereJsonPathMatches(string $paramName = ':path'): string
+    {
+        if (Configuration::$mode <> Mode::PgSQL) {
+            throw new DocumentException('JSON Path matching is only supported on PostgreSQL');
+        }
+        return "data @? $paramName::jsonpath";
+    }
+
     /**
      * Create an `INSERT` statement for a document
      *

src/Query/Count.php

@@ -33,4 +33,28 @@ class Count
     {
         return self::all($tableName) . ' WHERE ' . Query::whereByFields($fields, $match);
     }
+
+    /**
+     * Query to count matching documents using a JSON containment query (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table in which documents should be counted
+     * @return string The query to count documents using a JSON containment query
+     * @throws DocumentException If the database mode is not PostgreSQL
+     */
+    public static function byContains(string $tableName): string
+    {
+        return self::all($tableName) . ' WHERE ' . Query::whereDataContains();
+    }
+
+    /**
+     * Query to count matching documents using a JSON Path match (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table in which documents should be counted
+     * @return string The query to count documents using a JSON Path match
+     * @throws DocumentException If the database mode is not PostgreSQL
+     */
+    public static function byJsonPath(string $tableName): string
+    {
+        return self::all($tableName) . ' WHERE ' . Query::whereJsonPathMatches();
+    }
 }

src/Query/Definition.php

@@ -2,7 +2,7 @@
 
 namespace BitBadger\PDODocument\Query;
 
-use BitBadger\PDODocument\{Configuration, DocumentException, Mode};
+use BitBadger\PDODocument\{Configuration, DocumentException, DocumentIndex, Mode};
 
 /**
  * Queries to define tables and indexes
@@ -68,4 +68,25 @@ class Definition
     {
         return str_replace('INDEX', 'UNIQUE INDEX', self::ensureIndexOn($tableName, 'key', [Configuration::$idField]));
     }
+
+    /**
+     * Create a document-wide index on a table (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table on which the document index should be created
+     * @param DocumentIndex $indexType The type of index to be created
+     * @return string The SQL statement to create an index on JSON documents in the specified table
+     * @throws DocumentException If the database mode is not PostgreSQL
+     */
+    public static function ensureDocumentIndexOn(string $tableName, DocumentIndex $indexType): string
+    {
+        if (Configuration::$mode <> Mode::PgSQL) {
+            throw new DocumentException('Document indexes are only supported on PostgreSQL');
+        }
+        [, $tbl]  = self::splitSchemaAndTable($tableName);
+        $extraOps = match ($indexType) {
+            DocumentIndex::Full => '',
+            DocumentIndex::Optimized => ' jsonb_path_ops'
+        };
+        return "CREATE INDEX IF NOT EXISTS idx_{$tbl}_document ON $tableName USING GIN (data$extraOps)";
+    }
 }

src/Query/Delete.php

@@ -35,4 +35,28 @@ class Delete
     {
         return "DELETE FROM $tableName WHERE " . Query::whereByFields($fields, $match);
     }
+
+    /**
+     * Query to delete documents using a JSON containment query (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table from which documents should be deleted
+     * @return string The DELETE statement to delete documents via a JSON containment query
+     * @throws DocumentException If the database mode is not PostgreSQL
+     */
+    public static function byContains(string $tableName): string
+    {
+        return "DELETE FROM $tableName WHERE " . Query::whereDataContains();
+    }
+
+    /**
+     * Query to delete documents using a JSON Path match query (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table from which documents should be deleted
+     * @return string The DELETE statement to delete documents via a JSON Path match
+     * @throws DocumentException If the database mode is not PostgreSQL
+     */
+    public static function byJsonPath(string $tableName): string
+    {
+        return "DELETE FROM $tableName WHERE " . Query::whereJsonPathMatches();
+    }
 }

src/Query/Exists.php

@@ -47,4 +47,28 @@ class Exists
     {
         return self::query($tableName, Query::whereByFields($fields, $match));
     }
+
+    /**
+     * Query to determine if documents exist using a JSON containment query (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table in which document existence should be checked
+     * @return string The query to determine document existence by a JSON containment query
+     * @throws DocumentException If the database mode is not PostgreSQL
+     */
+    public static function byContains(string $tableName): string
+    {
+        return self::query($tableName, Query::whereDataContains());
+    }
+
+    /**
+     * Query to determine if documents exist using a JSON Path match query (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table in which document existence should be checked
+     * @return string The query to determine document existence by a JSON Path match
+     * @throws DocumentException If the database mode is not PostgreSQL
+     */
+    public static function byJsonPath(string $tableName): string
+    {
+        return self::query($tableName, Query::whereJsonPathMatches());
+    }
 }

src/Query/Find.php

@@ -35,4 +35,28 @@ class Find
     {
         return Query::selectFromTable($tableName) . ' WHERE ' . Query::whereByFields($fields, $match);
     }
+
+    /**
+     * Query to retrieve documents using a JSON containment query (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table from which documents should be retrieved
+     * @return string The SELECT statement to retrieve documents by a JSON containment query
+     * @throws DocumentException If the database mode is not PostgreSQL
+     */
+    public static function byContains(string $tableName): string
+    {
+        return Query::selectFromTable($tableName) . ' WHERE ' . Query::whereDataContains();
+    }
+
+    /**
+     * Query to retrieve documents using a JSON Path match query (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table from which documents should be retrieved
+     * @return string The SELECT statement to retrieve documents by a JSON Path match
+     * @throws DocumentException If the database mode is not PostgreSQL
+     */
+    public static function byJsonPath(string $tableName): string
+    {
+        return Query::selectFromTable($tableName) . ' WHERE ' . Query::whereJsonPathMatches();
+    }
 }

src/Query/Patch.php

@@ -53,4 +53,28 @@ class Patch
     {
         return self::update($tableName, Query::whereByFields($field, $match));
     }
+
+    /**
+     * Query to patch (partially update) a document via a JSON containment query (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table in which documents should be patched
+     * @return string The query to patch documents via a JSON containment query
+     * @throws DocumentException If the database mode is not PostgreSQL
+     */
+    public static function byContains(string $tableName): string
+    {
+        return self::update($tableName, Query::whereDataContains());
+    }
+
+    /**
+     * Query to patch (partially update) a document via a JSON Path match query (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table in which documents should be patched
+     * @return string The query to patch documents via a JSON Path match
+     * @throws DocumentException If the database mode is not PostgreSQL
+     */
+    public static function byJsonPath(string $tableName): string
+    {
+        return self::update($tableName, Query::whereJsonPathMatches());
+    }
 }

src/Query/RemoveFields.php

@@ -65,4 +65,30 @@ class RemoveFields
     {
         return self::update($tableName, $parameters, Query::whereByFields($fields, $match));
     }
+
+    /**
+     * Query to remove fields from documents via a JSON containment query (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table in which documents should be manipulated
+     * @param array $parameters The parameter list for the query
+     * @return string The UPDATE statement to remove fields from documents via a JSON containment query
+     * @throws DocumentException If the database mode is not PostgreSQL
+     */
+    public static function byContains(string $tableName, array $parameters): string
+    {
+        return self::update($tableName, $parameters, Query::whereDataContains());
+    }
+
+    /**
+     * Query to remove fields from documents via a JSON Path match query (PostgreSQL only)
+     *
+     * @param string $tableName The name of the table in which documents should be manipulated
+     * @param array $parameters The parameter list for the query
+     * @return string The UPDATE statement to remove fields from documents via a JSON Path match
+     * @throws DocumentException
+     */
+    public static function byJsonPath(string $tableName, array $parameters): string
+    {
+        return self::update($tableName, $parameters, Query::whereJsonPathMatches());
+    }
 }

tests/integration/postgresql/DefinitionTest.php

@@ -2,7 +2,7 @@
 
 namespace Test\Integration\PostgreSQL;
 
-use BitBadger\PDODocument\{Custom, Definition, DocumentException};
+use BitBadger\PDODocument\{Custom, Definition, DocumentException, DocumentIndex};
 use BitBadger\PDODocument\Mapper\ExistsMapper;
 use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
@@ -41,7 +41,7 @@ class DefinitionTest extends TestCase
             [':name' => $name], new ExistsMapper());
     }
 
-    public function testEnsureTableSucceeds()
+    public function testEnsureTableSucceeds(): void
     {
         $this->assertFalse($this->itExists('ensured'), 'The table should not exist already');
         $this->assertFalse($this->itExists('idx_ensured_key'), 'The key index should not exist already');
@@ -50,11 +50,29 @@ class DefinitionTest extends TestCase
         $this->assertTrue($this->itExists('idx_ensured_key'), 'The key index should now exist');
     }
 
-    public function testEnsureFieldIndexSucceeds()
+    public function testEnsureFieldIndexSucceeds(): void
     {
         $this->assertFalse($this->itExists('idx_ensured_test'), 'The index should not exist already');
         Definition::ensureTable('ensured');
         Definition::ensureFieldIndex('ensured', 'test', ['name', 'age']);
         $this->assertTrue($this->itExists('idx_ensured_test'), 'The index should now exist');
     }
+
+    public function testEnsureDocumentIndexSucceedsForFull(): void
+    {
+        $docIdx = 'idx_' . ThrowawayDb::TABLE . '_document';
+        Definition::ensureTable(ThrowawayDb::TABLE);
+        $this->assertFalse($this->itExists($docIdx), 'The document index should not exist');
+        Definition::ensureDocumentIndex(ThrowawayDb::TABLE, DocumentIndex::Full);
+        $this->assertTrue($this->itExists($docIdx), 'The document index should now exist');
+    }
+
+    public function testEnsureDocumentIndexSucceedsForOptimized(): void
+    {
+        $docIdx = 'idx_' . ThrowawayDb::TABLE . '_document';
+        Definition::ensureTable(ThrowawayDb::TABLE);
+        $this->assertFalse($this->itExists($docIdx), 'The document index should not exist');
+        Definition::ensureDocumentIndex(ThrowawayDb::TABLE, DocumentIndex::Optimized);
+        $this->assertTrue($this->itExists($docIdx), 'The document index should now exist');
+    }
 }

tests/integration/sqlite/DefinitionTest.php

@@ -2,7 +2,7 @@
 
 namespace Test\Integration\SQLite;
 
-use BitBadger\PDODocument\{Custom, Definition, DocumentException};
+use BitBadger\PDODocument\{Custom, Definition, DocumentException, DocumentIndex};
 use BitBadger\PDODocument\Mapper\ExistsMapper;
 use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
@@ -41,7 +41,7 @@ class DefinitionTest extends TestCase
             [':name' => $name], new ExistsMapper());
     }
 
-    public function testEnsureTableSucceeds()
+    public function testEnsureTableSucceeds(): void
     {
         $this->assertFalse($this->itExists('ensured'), 'The table should not exist already');
         $this->assertFalse($this->itExists('idx_ensured_key'), 'The key index should not exist already');
@@ -50,11 +50,17 @@ class DefinitionTest extends TestCase
         $this->assertTrue($this->itExists('idx_ensured_key'), 'The key index should now exist');
     }
 
-    public function testEnsureFieldIndexSucceeds()
+    public function testEnsureFieldIndexSucceeds(): void
     {
         $this->assertFalse($this->itExists('idx_ensured_test'), 'The index should not exist already');
         Definition::ensureTable('ensured');
         Definition::ensureFieldIndex('ensured', 'test', ['name', 'age']);
         $this->assertTrue($this->itExists('idx_ensured_test'), 'The index should now exist');
     }
+
+    public function testEnsureDocumentIndexFails(): void
+    {
+        $this->expectException(DocumentException::class);
+        Definition::ensureDocumentIndex('nope', DocumentIndex::Full);
+    }
 }

tests/integration/sqlite/ThrowawayDb.php

@@ -48,6 +48,6 @@ class ThrowawayDb
     public static function destroy(string $fileName): void
     {
         Configuration::resetPDO();
-        unlink("./$fileName");
+        if (file_exists("./$fileName")) unlink("./$fileName");
     }
 }

tests/unit/ConfigurationTest.php

@@ -9,6 +9,7 @@ use PHPUnit\Framework\TestCase;
 /**
  * Unit tests for the Configuration class
  */
+#[TestDox('Configuration (Unit tests)')]
 class ConfigurationTest extends TestCase
 {
     #[TestDox('ID field default succeeds')]

tests/unit/DocumentExceptionTest.php

@@ -4,11 +4,13 @@ namespace Test\Unit;
 
 use BitBadger\PDODocument\DocumentException;
 use Exception;
+use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for the DocumentException class
  */
+#[TestDox('Document Exception (Unit tests)')]
 class DocumentExceptionTest extends TestCase
 {
     public function testConstructorSucceedsWithCodeAndPriorException()

tests/unit/FieldMatchTest.php

@@ -3,11 +3,13 @@
 namespace Test\Unit;
 
 use BitBadger\PDODocument\FieldMatch;
+use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for the FieldMatch enum
  */
+#[TestDox('Field Match (Unit tests)')]
 class FieldMatchTest extends TestCase
 {
     public function testToStringSucceedsForAll(): void

tests/unit/FieldTest.php

@@ -9,6 +9,7 @@ use PHPUnit\Framework\TestCase;
 /**
  * Unit tests for the Field class
  */
+#[TestDox('Field (Unit tests)')]
 class FieldTest extends TestCase
 {
     #[TestDox('Append parameter succeeds for EX')]

tests/unit/Mapper/ArrayMapperTest.php

@@ -3,11 +3,13 @@
 namespace Test\Unit\Mapper;
 
 use BitBadger\PDODocument\Mapper\ArrayMapper;
+use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for the ArrayMapper class
  */
+#[TestDox('Array Mapper (Unit tests)')]
 class ArrayMapperTest extends TestCase
 {
     public function testMapSucceeds(): void

tests/unit/Mapper/CountMapperTest.php

@@ -3,11 +3,13 @@
 namespace Test\Unit\Mapper;
 
 use BitBadger\PDODocument\Mapper\CountMapper;
+use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for the CountMapper class
  */
+#[TestDox('Count Mapper (Unit tests)')]
 class CountMapperTest extends TestCase
 {
     public function testMapSucceeds(): void

tests/unit/Mapper/DocumentMapperTest.php

@@ -22,6 +22,7 @@ class TestDocument
 /**
  * Unit tests for the DocumentMapper class
  */
+#[TestDox('Document Mapper (Unit tests)')]
 class DocumentMapperTest extends TestCase
 {
     public function testConstructorSucceedsWithDefaultField(): void

tests/unit/Mapper/ExistsMapperTest.php

@@ -10,6 +10,7 @@ use PHPUnit\Framework\TestCase;
 /**
  * Unit tests for the ExistsMapper class
  */
+#[TestDox('Exists Mapper (Unit tests)')]
 class ExistsMapperTest extends TestCase
 {
     #[TestDox('Map succeeds for PostgreSQL')]

tests/unit/Mapper/StringMapperTest.php

@@ -3,8 +3,13 @@
 namespace Test\Unit\Mapper;
 
 use BitBadger\PDODocument\Mapper\StringMapper;
+use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
 
+/**
+ * Unit tests for the StringMapper class
+ */
+#[TestDox('String Mapper (Unit tests)')]
 class StringMapperTest extends TestCase
 {
     public function testMapSucceedsWhenFieldIsPresentAndString()

tests/unit/OpTest.php

@@ -9,6 +9,7 @@ use PHPUnit\Framework\TestCase;
 /**
  * Unit tests for the Op enumeration
  */
+#[TestDox('Op (Unit tests)')]
 class OpTest extends TestCase
 {
     #[TestDox('To string succeeds for EQ')]

tests/unit/ParametersTest.php

@@ -9,6 +9,7 @@ use PHPUnit\Framework\TestCase;
 /**
  * Unit tests for the Parameters class
  */
+#[TestDox('Parameters (Unit tests)')]
 class ParametersTest extends TestCase
 {
     #[TestDox('ID succeeds with string')]

tests/unit/Query/CountTest.php

@@ -2,30 +2,64 @@
 
 namespace Test\Unit\Query;
 
-use BitBadger\PDODocument\{Configuration, Field, Mode};
+use BitBadger\PDODocument\{Configuration, DocumentException, Field, Mode};
 use BitBadger\PDODocument\Query\Count;
+use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for the Count class
  */
+#[TestDox('Count Queries (Unit tests)')]
 class CountTest extends TestCase
 {
+    public function tearDown(): void
+    {
+        Configuration::$mode = null;
+        parent::tearDown();
+    }
 
-    public function testAllSucceeds()
+    public function testAllSucceeds(): void
     {
         $this->assertEquals('SELECT COUNT(*) FROM a_table', Count::all('a_table'),
             'SELECT statement not generated correctly');
     }
 
-    public function testByFieldsSucceeds()
+    public function testByFieldsSucceeds(): void
     {
         Configuration::$mode = Mode::SQLite;
-        try {
-            $this->assertEquals("SELECT COUNT(*) FROM somewhere WHERE data->>'errors' > :errors",
-                Count::byFields('somewhere', [Field::GT('errors', 10, ':errors')]));
-        } finally {
-            Configuration::$mode = null;
-        }
+        $this->assertEquals("SELECT COUNT(*) FROM somewhere WHERE data->>'errors' > :errors",
+            Count::byFields('somewhere', [Field::GT('errors', 10, ':errors')]),
+            'SELECT statement not generated correctly');
+    }
+
+    #[TestDox('By contains succeeds for PostgreSQL')]
+    public function testByContainsSucceedsForPostgreSQL(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals("SELECT COUNT(*) FROM the_table WHERE data @> :criteria", Count::byContains('the_table'),
+            'SELECT statement not generated correctly');
+    }
+
+    #[TestDox('By contains fails for non PostgreSQL')]
+    public function testByContainsFailsForNonPostgreSQL(): void
+    {
+        $this->expectException(DocumentException::class);
+        Count::byContains('');
+    }
+
+    #[TestDox('By JSON Path succeeds for PostgreSQL')]
+    public function testByJsonPathSucceedsForPostgreSQL(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals("SELECT COUNT(*) FROM a_table WHERE data @? :path::jsonpath", Count::byJsonPath('a_table'),
+            'SELECT statement not generated correctly');
+    }
+
+    #[TestDox('By JSON Path fails for non PostgreSQL')]
+    public function testByJsonPathFailsForNonPostgreSQL(): void
+    {
+        $this->expectException(DocumentException::class);
+        Count::byJsonPath('');
     }
 }

tests/unit/Query/DefinitionTest.php

@@ -2,7 +2,7 @@
 
 namespace Test\Unit\Query;
 
-use BitBadger\PDODocument\{Configuration, DocumentException, Mode};
+use BitBadger\PDODocument\{Configuration, DocumentException, DocumentIndex, Mode};
 use BitBadger\PDODocument\Query\Definition;
 use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
@@ -10,36 +10,34 @@ use PHPUnit\Framework\TestCase;
 /**
  * Unit tests for the Definition class
  */
+#[TestDox('Definition Queries (Unit tests)')]
 class DefinitionTest extends TestCase
 {
+    protected function tearDown(): void
+    {
+        Configuration::$mode = null;
+        parent::tearDown();
+    }
+
     #[TestDox('Ensure table succeeds for PosgtreSQL')]
     public function testEnsureTableSucceedsForPostgreSQL(): void
     {
-        try {
-            Configuration::$mode = Mode::PgSQL;
-            $this->assertEquals('CREATE TABLE IF NOT EXISTS documents (data JSONB NOT NULL)',
-                Definition::ensureTable('documents'), 'CREATE TABLE statement not generated correctly');
-        } finally {
-            Configuration::$mode = null;
-        }
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals('CREATE TABLE IF NOT EXISTS documents (data JSONB NOT NULL)',
+            Definition::ensureTable('documents'), 'CREATE TABLE statement not generated correctly');
     }
 
     #[TestDox('Ensure table succeeds for SQLite')]
     public function testEnsureTableSucceedsForSQLite(): void
     {
-        try {
-            Configuration::$mode = Mode::SQLite;
-            $this->assertEquals('CREATE TABLE IF NOT EXISTS dox (data TEXT NOT NULL)', Definition::ensureTable('dox'),
-                'CREATE TABLE statement not generated correctly');
-        } finally {
-            Configuration::$mode = null;
-        }
+        Configuration::$mode = Mode::SQLite;
+        $this->assertEquals('CREATE TABLE IF NOT EXISTS dox (data TEXT NOT NULL)', Definition::ensureTable('dox'),
+            'CREATE TABLE statement not generated correctly');
     }
 
     public function testEnsureTableFailsWhenModeNotSet(): void
     {
         $this->expectException(DocumentException::class);
-        Configuration::$mode = null;
         Definition::ensureTable('boom');
     }
 
@@ -57,9 +55,30 @@ class DefinitionTest extends TestCase
             'CREATE INDEX statement not generated correctly');
     }
 
-    public function testEnsureKey(): void
+    public function testEnsureKeySucceeds(): void
     {
         $this->assertEquals("CREATE UNIQUE INDEX IF NOT EXISTS idx_tbl_key ON tbl ((data->>'id'))",
             Definition::ensureKey('tbl'), 'CREATE INDEX statement for document key not generated correctly');
     }
+
+    public function testEnsureDocumentIndexOnSucceedsForSchemaAndFull(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals("CREATE INDEX IF NOT EXISTS idx_tbl_document ON my.tbl USING GIN (data)",
+            Definition::ensureDocumentIndexOn('my.tbl', DocumentIndex::Full));
+    }
+
+    public function testEnsureDocumentIndexOnSucceedsForNoSchemaAndOptimized(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals("CREATE INDEX IF NOT EXISTS idx_it_document ON it USING GIN (data jsonb_path_ops)",
+            Definition::ensureDocumentIndexOn('it', DocumentIndex::Optimized));
+    }
+
+    #[TestDox('Ensure document index on fails for non PostgreSQL')]
+    public function testEnsureDocumentIndexOnFailsForNonPostgreSQL(): void
+    {
+        $this->expectException(DocumentException::class);
+        Definition::ensureDocumentIndexOn('', DocumentIndex::Full);
+    }
 }

tests/unit/Query/DeleteTest.php

@@ -2,7 +2,7 @@
 
 namespace Test\Unit\Query;
 
-use BitBadger\PDODocument\{Configuration, Field, Mode};
+use BitBadger\PDODocument\{Configuration, DocumentException, Field, Mode};
 use BitBadger\PDODocument\Query\Delete;
 use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
@@ -10,13 +10,9 @@ use PHPUnit\Framework\TestCase;
 /**
  * Unit tests for the Delete class
  */
+#[TestDox('Delete Queries (Unit tests)')]
 class DeleteTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Configuration::$mode = Mode::SQLite;
-    }
-
     protected function tearDown(): void
     {
         Configuration::$mode = null;
@@ -25,14 +21,46 @@ class DeleteTest extends TestCase
     #[TestDox('By ID succeeds')]
     public function testByIdSucceeds(): void
     {
+        Configuration::$mode = Mode::SQLite;
         $this->assertEquals("DELETE FROM over_there WHERE data->>'id' = :id", Delete::byId('over_there'),
             'DELETE statement not constructed correctly');
     }
 
     public function testByFieldsSucceeds(): void
     {
+        Configuration::$mode = Mode::SQLite;
         $this->assertEquals("DELETE FROM my_table WHERE data->>'value' < :max AND data->>'value' >= :min",
             Delete::byFields('my_table', [Field::LT('value', 99, ':max'), Field::GE('value', 18, ':min')]),
             'DELETE statement not constructed correctly');
     }
+
+    #[TestDox('By contains succeeds for PostgreSQL')]
+    public function testByContainsSucceedsForPostgreSQL(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals('DELETE FROM somewhere WHERE data @> :criteria', Delete::byContains('somewhere'),
+            'DELETE statement not constructed correctly');
+    }
+
+    #[TestDox('By contains fails for non PostgreSQL')]
+    public function testByContainsFailsForNonPostgreSQL(): void
+    {
+        $this->expectException(DocumentException::class);
+        Delete::byContains('');
+    }
+
+    #[TestDox('By JSON Path succeeds for PostgreSQL')]
+    public function testByJsonPathSucceedsForPostgreSQL(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals('DELETE FROM here WHERE data @? :path::jsonpath', Delete::byJsonPath('here'),
+            'DELETE statement not constructed correctly');
+    }
+
+    #[TestDox('By JSON Path fails for non PostgreSQL')]
+    public function testByJsonPathFailsForNonPostgreSQL(): void
+    {
+        $this->expectException(DocumentException::class);
+        Delete::byJsonPath('');
+    }
 }

tests/unit/Query/ExistsTest.php

@@ -2,7 +2,7 @@
 
 namespace Test\Unit\Query;
 
-use BitBadger\PDODocument\{Configuration, Field, Mode};
+use BitBadger\PDODocument\{Configuration, DocumentException, Field, Mode};
 use BitBadger\PDODocument\Query\Exists;
 use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
@@ -10,13 +10,9 @@ use PHPUnit\Framework\TestCase;
 /**
  * Unit tests for the Exists class
  */
+#[TestDox('Exists Queries (Unit tests)')]
 class ExistsTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Configuration::$mode = Mode::SQLite;
-    }
-
     protected function tearDown(): void
     {
         Configuration::$mode = null;
@@ -24,6 +20,7 @@ class ExistsTest extends TestCase
 
     public function testQuerySucceeds(): void
     {
+        Configuration::$mode = Mode::SQLite;
         $this->assertEquals('SELECT EXISTS (SELECT 1 FROM abc WHERE def)', Exists::query('abc', 'def'),
             'Existence query not generated correctly');
     }
@@ -31,14 +28,46 @@ class ExistsTest extends TestCase
     #[TestDox('By ID succeeds')]
     public function testByIdSucceeds(): void
     {
+        Configuration::$mode = Mode::SQLite;
         $this->assertEquals("SELECT EXISTS (SELECT 1 FROM dox WHERE data->>'id' = :id)", Exists::byId('dox'),
             'Existence query not generated correctly');
     }
 
     public function testByFieldsSucceeds(): void
     {
+        Configuration::$mode = Mode::SQLite;
         $this->assertEquals("SELECT EXISTS (SELECT 1 FROM box WHERE data->>'status' <> :status)",
             Exists::byFields('box', [Field::NE('status', 'occupied', ':status')]),
             'Existence query not generated correctly');
     }
+
+    #[TestDox('By contains succeeds for PostgreSQL')]
+    public function testByContainsSucceedsForPostgreSQL(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals('SELECT EXISTS (SELECT 1 FROM pocket WHERE data @> :criteria)',
+            Exists::byContains('pocket'), 'Existence query not generated correctly');
+    }
+
+    #[TestDox('By contains fails for non PostgreSQL')]
+    public function testByContainsFailsForNonPostgreSQL(): void
+    {
+        $this->expectException(DocumentException::class);
+        Exists::byContains('');
+    }
+
+    #[TestDox('By JSON Path succeeds for PostgreSQL')]
+    public function testByJsonPathSucceedsForPostgreSQL(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals('SELECT EXISTS (SELECT 1 FROM lint WHERE data @? :path::jsonpath)',
+            Exists::byJsonPath('lint'), 'Existence query not generated correctly');
+    }
+
+    #[TestDox('By JSON Path fails for non PostgreSQL')]
+    public function testByJsonPathFailsForNonPostgreSQL(): void
+    {
+        $this->expectException(DocumentException::class);
+        Exists::byJsonPath('');
+    }
 }

tests/unit/Query/FindTest.php

@@ -2,7 +2,7 @@
 
 namespace Test\Unit\Query;
 
-use BitBadger\PDODocument\{Configuration, Field, FieldMatch, Mode};
+use BitBadger\PDODocument\{Configuration, DocumentException, Field, FieldMatch, Mode};
 use BitBadger\PDODocument\Query\Find;
 use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
@@ -10,13 +10,9 @@ use PHPUnit\Framework\TestCase;
 /**
  * Unit tests for the Find class
  */
+#[TestDox('Find Queries (Unit tests)')]
 class FindTest extends TestCase
 {
-    protected function setUp(): void
-    {
-        Configuration::$mode = Mode::SQLite;
-    }
-
     protected function tearDown(): void
     {
         Configuration::$mode = null;
@@ -25,15 +21,47 @@ class FindTest extends TestCase
     #[TestDox('By ID succeeds')]
     public function testByIdSucceeds(): void
     {
+        Configuration::$mode = Mode::SQLite;
         $this->assertEquals("SELECT data FROM here WHERE data->>'id' = :id", Find::byId('here'),
             'SELECT query not generated correctly');
     }
 
     public function testByFieldsSucceeds(): void
     {
+        Configuration::$mode = Mode::SQLite;
         $this->assertEquals("SELECT data FROM there WHERE data->>'active' = :act OR data->>'locked' = :lock",
             Find::byFields('there', [Field::EQ('active', true, ':act'), Field::EQ('locked', true, ':lock')],
                 FieldMatch::Any),
             'SELECT query not generated correctly');
     }
+
+    #[TestDox('By contains succeeds for PostgreSQL')]
+    public function testByContainsSucceedsForPostgreSQL(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals('SELECT data FROM disc WHERE data @> :criteria', Find::byContains('disc'),
+            'SELECT query not generated correctly');
+    }
+
+    #[TestDox('By contains fails for non PostgreSQL')]
+    public function testByContainsFailsForNonPostgreSQL(): void
+    {
+        $this->expectException(DocumentException::class);
+        Find::byContains('');
+    }
+
+    #[TestDox('By JSON Path succeeds for PostgreSQL')]
+    public function testByJsonPathSucceedsForPostgreSQL(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals('SELECT data FROM light WHERE data @? :path::jsonpath', Find::byJsonPath('light'),
+            'SELECT query not generated correctly');
+    }
+
+    #[TestDox('By JSON Path fails for non PostgreSQL')]
+    public function testByJsonPathFailsForNonPostgreSQL(): void
+    {
+        $this->expectException(DocumentException::class);
+        Find::byJsonPath('');
+    }
 }

tests/unit/Query/PatchTest.php

@@ -10,71 +10,87 @@ use PHPUnit\Framework\TestCase;
 /**
  * Unit tests for the Patch class
  */
+#[TestDox('Patch Queries (Unit tests)')]
 class PatchTest extends TestCase
 {
+    protected function tearDown(): void
+    {
+        Configuration::$mode = null;
+        parent::tearDown();
+    }
     #[TestDox('By ID succeeds for PostgreSQL')]
     public function testByIdSucceedsForPostgreSQL(): void
     {
-        try {
-            Configuration::$mode = Mode::PgSQL;
-            $this->assertEquals("UPDATE doc_table SET data = data || :data WHERE data->>'id' = :id",
-                Patch::byId('doc_table'), 'Patch UPDATE statement is not correct');
-        } finally {
-            Configuration::$mode = null;
-        }
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals("UPDATE doc_table SET data = data || :data WHERE data->>'id' = :id",
+            Patch::byId('doc_table'), 'Patch UPDATE statement is not correct');
     }
 
     #[TestDox('By ID succeeds for SQLite')]
     public function testByIdSucceedsForSQLite(): void
     {
-        try {
-            Configuration::$mode = Mode::SQLite;
-            $this->assertEquals("UPDATE my_table SET data = json_patch(data, json(:data)) WHERE data->>'id' = :id",
-                Patch::byId('my_table'), 'Patch UPDATE statement is not correct');
-        } finally {
-            Configuration::$mode = null;
-        }
+        Configuration::$mode = Mode::SQLite;
+        $this->assertEquals("UPDATE my_table SET data = json_patch(data, json(:data)) WHERE data->>'id' = :id",
+            Patch::byId('my_table'), 'Patch UPDATE statement is not correct');
     }
 
     #[TestDox('By ID fails when mode not set')]
     public function testByIdFailsWhenModeNotSet(): void
     {
         $this->expectException(DocumentException::class);
-        Configuration::$mode = null;
         Patch::byId('oof');
     }
 
     #[TestDox('By fields succeeds for PostgreSQL')]
     public function testByFieldsSucceedsForPostgreSQL(): void
     {
-        try {
-            Configuration::$mode = Mode::PgSQL;
-            $this->assertEquals("UPDATE that SET data = data || :data WHERE (data->>'something')::numeric < :some",
-                Patch::byFields('that', [Field::LT('something', 17, ':some')]),
-                'Patch UPDATE statement is not correct');
-        } finally {
-            Configuration::$mode = null;
-        }
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals("UPDATE that SET data = data || :data WHERE (data->>'something')::numeric < :some",
+            Patch::byFields('that', [Field::LT('something', 17, ':some')]), 'Patch UPDATE statement is not correct');
     }
 
     #[TestDox('By fields succeeds for SQLite')]
     public function testByFieldsSucceedsForSQLite(): void
     {
-        try {
-            Configuration::$mode = Mode::SQLite;
-            $this->assertEquals(
-                "UPDATE a_table SET data = json_patch(data, json(:data)) WHERE data->>'something' > :it",
-                Patch::byFields('a_table', [Field::GT('something', 17, ':it')]),
-                'Patch UPDATE statement is not correct');
-        } finally {
-            Configuration::$mode = null;
-        }
+        Configuration::$mode = Mode::SQLite;
+        $this->assertEquals(
+            "UPDATE a_table SET data = json_patch(data, json(:data)) WHERE data->>'something' > :it",
+            Patch::byFields('a_table', [Field::GT('something', 17, ':it')]), 'Patch UPDATE statement is not correct');
     }
 
     public function testByFieldsFailsWhenModeNotSet(): void
     {
         $this->expectException(DocumentException::class);
-        Configuration::$mode = null;
         Patch::byFields('oops', []);
     }
+
+    #[TestDox('By contains succeeds for PostgreSQL')]
+    public function testByContainsSucceedsForPostgreSQL(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals('UPDATE this SET data = data || :data WHERE data @> :criteria', Patch::byContains('this'),
+            'Patch UPDATE statement is not correct');
+    }
+
+    #[TestDox('By contains fails for non PostgreSQL')]
+    public function testByContainsFailsForNonPostgreSQL(): void
+    {
+        $this->expectException(DocumentException::class);
+        Patch::byContains('');
+    }
+
+    #[TestDox('By JSON Path succeeds for PostgreSQL')]
+    public function testByJsonPathSucceedsForPostgreSQL(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals('UPDATE that SET data = data || :data WHERE data @? :path::jsonpath',
+            Patch::byJsonPath('that'), 'Patch UPDATE statement is not correct');
+    }
+
+    #[TestDox('By JSON Path fails for non PostgreSQL')]
+    public function testByJsonPathFailsForNonPostgreSQL(): void
+    {
+        $this->expectException(DocumentException::class);
+        Patch::byJsonPath('');
+    }
 }

tests/unit/Query/RemoveFieldsTest.php

@@ -10,108 +10,117 @@ use PHPUnit\Framework\TestCase;
 /**
  * Unit tests for the RemoveFields class
  */
+#[TestDox('Remove Fields Queries (Unit tests)')]
 class RemoveFieldsTest extends TestCase
 {
+    protected function tearDown(): void
+    {
+        Configuration::$mode = null;
+    }
+
     #[TestDox('Update succeeds for PostgreSQL')]
     public function testUpdateSucceedsForPostgreSQL(): void
     {
-        try {
-            Configuration::$mode = Mode::PgSQL;
-            $this->assertEquals('UPDATE taco SET data = data - :names::text[] WHERE it = true',
-                RemoveFields::update('taco', [':names' => "{one,two}"], 'it = true'),
-                'UPDATE statement not correct');
-        } finally {
-            Configuration::$mode = null;
-        }
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals('UPDATE taco SET data = data - :names::text[] WHERE it = true',
+            RemoveFields::update('taco', [':names' => "{one,two}"], 'it = true'), 'UPDATE statement not correct');
     }
 
     #[TestDox('Update succeeds for SQLite')]
     public function testUpdateSucceedsForSQLite(): void
     {
-        try {
-            Configuration::$mode = Mode::SQLite;
-            $this->assertEquals('UPDATE burrito SET data = json_remove(data, :name0, :name1, :name2) WHERE a = b',
-                RemoveFields::update('burrito', Parameters::fieldNames(':name', ['one', 'two', 'ten']), 'a = b'),
-                'UPDATE statement not correct');
-        } finally {
-            Configuration::$mode = null;
-        }
+        Configuration::$mode = Mode::SQLite;
+        $this->assertEquals('UPDATE burrito SET data = json_remove(data, :name0, :name1, :name2) WHERE a = b',
+            RemoveFields::update('burrito', Parameters::fieldNames(':name', ['one', 'two', 'ten']), 'a = b'),
+            'UPDATE statement not correct');
     }
 
     public function testUpdateFailsWhenModeNotSet(): void
     {
         $this->expectException(DocumentException::class);
-        Configuration::$mode = null;
         RemoveFields::update('wow', [], '');
     }
 
     #[TestDox('By ID succeeds for PostgreSQL')]
     public function testByIdSucceedsForPostgreSQL()
     {
-        try {
-            Configuration::$mode = Mode::PgSQL;
-            $this->assertEquals("UPDATE churro SET data = data - :bite::text[] WHERE data->>'id' = :id",
-                RemoveFields::byId('churro', Parameters::fieldNames(':bite', ['byte'])),
-                'UPDATE statement not correct');
-        } finally {
-            Configuration::$mode = null;
-        }
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals("UPDATE churro SET data = data - :bite::text[] WHERE data->>'id' = :id",
+            RemoveFields::byId('churro', Parameters::fieldNames(':bite', ['byte'])), 'UPDATE statement not correct');
     }
 
     #[TestDox('By ID succeeds for SQLite')]
     public function testByIdSucceedsForSQLite()
     {
-        try {
-            Configuration::$mode = Mode::SQLite;
-            $this->assertEquals("UPDATE quesadilla SET data = json_remove(data, :bite0) WHERE data->>'id' = :id",
-                RemoveFields::byId('quesadilla', Parameters::fieldNames(':bite', ['byte'])),
-                'UPDATE statement not correct');
-        } finally {
-            Configuration::$mode = null;
-        }
+        Configuration::$mode = Mode::SQLite;
+        $this->assertEquals("UPDATE quesadilla SET data = json_remove(data, :bite0) WHERE data->>'id' = :id",
+            RemoveFields::byId('quesadilla', Parameters::fieldNames(':bite', ['byte'])),
+            'UPDATE statement not correct');
     }
 
     #[TestDox('By ID fails when mode not set')]
     public function testByIdFailsWhenModeNotSet(): void
     {
         $this->expectException(DocumentException::class);
-        Configuration::$mode = null;
         RemoveFields::byId('oof', []);
     }
 
     #[TestDox('By fields succeeds for PostgreSQL')]
     public function testByFieldsSucceedsForPostgreSQL()
     {
-        try {
-            Configuration::$mode = Mode::PgSQL;
-            $this->assertEquals("UPDATE enchilada SET data = data - :sauce::text[] WHERE data->>'cheese' = :queso",
-                RemoveFields::byFields('enchilada', [Field::EQ('cheese', 'jack', ':queso')],
-                    Parameters::fieldNames(':sauce', ['white'])),
-                'UPDATE statement not correct');
-        } finally {
-            Configuration::$mode = null;
-        }
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals("UPDATE enchilada SET data = data - :sauce::text[] WHERE data->>'cheese' = :queso",
+            RemoveFields::byFields('enchilada', [Field::EQ('cheese', 'jack', ':queso')],
+                Parameters::fieldNames(':sauce', ['white'])),
+            'UPDATE statement not correct');
     }
 
     #[TestDox('By fields succeeds for SQLite')]
     public function testByFieldsSucceedsForSQLite()
     {
-        try {
-            Configuration::$mode = Mode::SQLite;
-            $this->assertEquals(
-                "UPDATE chimichanga SET data = json_remove(data, :filling0) WHERE data->>'side' = :rice",
-                RemoveFields::byFields('chimichanga', [Field::EQ('side', 'beans', ':rice')],
-                    Parameters::fieldNames(':filling', ['beef'])),
-                'UPDATE statement not correct');
-        } finally {
-            Configuration::$mode = null;
-        }
+        Configuration::$mode = Mode::SQLite;
+        $this->assertEquals(
+            "UPDATE chimichanga SET data = json_remove(data, :filling0) WHERE data->>'side' = :rice",
+            RemoveFields::byFields('chimichanga', [Field::EQ('side', 'beans', ':rice')],
+                Parameters::fieldNames(':filling', ['beef'])),
+            'UPDATE statement not correct');
     }
 
     public function testByFieldsFailsWhenModeNotSet(): void
     {
         $this->expectException(DocumentException::class);
-        Configuration::$mode = null;
         RemoveFields::byFields('boing', [], []);
     }
+
+    #[TestDox('By contains succeeds for PostgreSQL')]
+    public function testByContainsSucceedsForPostgreSQL(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals('UPDATE food SET data = data - :drink::text[] WHERE data @> :criteria',
+            RemoveFields::byContains('food', Parameters::fieldNames(':drink', ['a', 'b'])),
+            'UPDATE statement not correct');
+    }
+
+    #[TestDox('By contains fails for non PostgreSQL')]
+    public function testByContainsFailsForNonPostgreSQL(): void
+    {
+        $this->expectException(DocumentException::class);
+        RemoveFields::byContains('', []);
+    }
+
+    #[TestDox('By JSON Path succeeds for PostgreSQL')]
+    public function testByJsonPathSucceedsForPostgreSQL(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        $this->assertEquals('UPDATE dessert SET data = data - :cake::text[] WHERE data @? :path::jsonpath',
+            RemoveFields::byJsonPath('dessert', Parameters::fieldNames(':cake', ['b', 'c'])),
+            'UPDATE statement not correct');
+    }
+
+    #[TestDox('By JSON Path fails for non PostgreSQL')]
+    public function testByJsonPathFailsForNonPostgreSQL(): void
+    {
+        $this->expectException(DocumentException::class);
+        RemoveFields::byJsonPath('', []);
+    }
 }

tests/unit/QueryTest.php

@@ -9,6 +9,7 @@ use PHPUnit\Framework\TestCase;
 /**
  * Unit tests for the Query class
  */
+#[TestDox('Query (Unit tests)')]
 class QueryTest extends TestCase
 {
     protected function setUp(): void
@@ -60,6 +61,68 @@ class QueryTest extends TestCase
         $this->assertEquals("data->>'id' = :di", Query::whereById(':di'), 'WHERE fragment not constructed correctly');
     }
 
+    public function testWhereDataContainsSucceedsWithDefaultParameter(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        try {
+            $this->assertEquals('data @> :criteria', Query::whereDataContains(),
+                'WHERE fragment not constructed correctly');
+        } finally {
+            Configuration::$mode = null;
+        }
+    }
+
+    public function testWhereDataContainsSucceedsWithSpecifiedParameter(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        try {
+            $this->assertEquals('data @> :it', Query::whereDataContains(':it'),
+                'WHERE fragment not constructed correctly');
+        } finally {
+            Configuration::$mode = null;
+        }
+    }
+
+    #[TestDox('Where data contains fails if not PostgreSQL')]
+    public function testWhereDataContainsFailsIfNotPostgreSQL(): void
+    {
+        Configuration::$mode = null;
+        $this->expectException(DocumentException::class);
+        Query::whereDataContains();
+    }
+
+    #[TestDox('Where JSON Path matches succeeds with default parameter')]
+    public function testWhereJsonPathMatchesSucceedsWithDefaultParameter(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        try {
+            $this->assertEquals('data @? :path::jsonpath', Query::whereJsonPathMatches(),
+                'WHERE fragment not constructed correctly');
+        } finally {
+            Configuration::$mode = null;
+        }
+    }
+
+    #[TestDox('Where JSON Path matches succeeds with specified parameter')]
+    public function testWhereJsonPathMatchesSucceedsWithSpecifiedParameter(): void
+    {
+        Configuration::$mode = Mode::PgSQL;
+        try {
+            $this->assertEquals('data @? :road::jsonpath', Query::whereJsonPathMatches(':road'),
+                'WHERE fragment not constructed correctly');
+        } finally {
+            Configuration::$mode = null;
+        }
+    }
+
+    #[TestDox('Where JSON Path matches fails if not PostgreSQL')]
+    public function testWhereJsonPathMatchesFailsIfNotPostgreSQL(): void
+    {
+        Configuration::$mode = null;
+        $this->expectException(DocumentException::class);
+        Query::whereJsonPathMatches();
+    }
+
     #[TestDox('Insert succeeds with no auto-ID for PostgreSQL')]
     public function testInsertSucceedsWithNoAutoIdForPostgreSQL(): void
     {