BasePDOTestCase.php
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	<?php

	namespace Keruald\Database\Tests\Engines;

	use Keruald\Database\Engines\PDOEngine;
	use Keruald\Database\Exceptions\SqlException;
	use Keruald\Database\Query\PDOQuery;
	use Keruald\Database\Result\PDODatabaseResult;

	use PHPUnit\Framework\Attributes\DataProvider;
	use PHPUnit\Framework\TestCase;

	use PDO;
	use PDOStatement;

	abstract class BasePDOTestCase extends TestCase {

	protected PDOEngine $db;

	protected static abstract function buildEngine () : PDOEngine;

	protected function setUp (): void {
	$this->db = static::buildEngine();
	}

	public function testQueryScalar(): void {
	$sql = "SELECT 1+1";
	$this->assertEquals(2, $this->db->queryScalar($sql));
	}

	public function testQueryScalarWithoutQuery(): void {
	$this->assertEquals("", $this->db->queryScalar(""));
	}

	public function testQueryScalarWithWrongQuery(): void {
	$this->expectException(SqlException::class);

	$sql = "DELETE FROM nonexisting";
	$this->db->queryScalar($sql);
	}

	///
	/// Integration tests for PDOQuery
	///

	public function testPrepare(): void {
	$sql = "SELECT :word";

	$query = $this->db->prepare($sql);
	$this->assertInstanceOf(PDOQuery::class, $query);

	$result = $query
	->with("word", "foo")
	->query();
	$this->assertInstanceOf(PDODatabaseResult::class, $result);

	$row = $result->fetchRow();
	$this->assertContains("foo", $row);
	}

	public function testWithValue(): void {
	$query = $this->db
	->prepare("SELECT :word")
	->withvalue("word", "foo");

	$this->assertEquals("foo", $query->query()->fetchScalar());

	}

	public function testWithValueWithVariableChange(): void {
	$word = "foo";

	$query = $this->db
	->prepare("SELECT :word")
	->withvalue("word", $word);

	$word = "bar";

	$this->assertEquals("foo", $query->query()->fetchScalar());

	}

	public function testWithIndexedValue(): void {
	$query = $this->db
	->prepare("SELECT ?")
	->withIndexedValue(1, "foo");

	$this->assertEquals("foo", $query->query()->fetchScalar());
	}

	public function testBind(): void {
	$word = "foo";

	$query = $this->db
	->prepare("SELECT :word")
	->bind("word", $word);

	$this->assertEquals("foo", $query->query()->fetchScalar());

	}

	public function testBindWithVariableChange(): void {
	$word = "foo";

	$query = $this->db
	->prepare("SELECT :word")
	->bind("word", $word);

	$word = "bar";

	$this->assertEquals("bar", $query->query()->fetchScalar());
	}


	public static function provideFetchModeAndScalarResults(): iterable {
	yield "PDO::FETCH_ASSOC" => [
	PDO::FETCH_ASSOC,
	["?column?" => "foo"],
	];

	yield "PDO::FETCH_NUM" => [
	PDO::FETCH_NUM,
	[0 => "foo"],
	];

	yield "PDO::FETCH_BOTH" => [
	PDO::FETCH_BOTH,
	[0 => "foo", "?column?" => "foo"],
	];
	}

	#[DataProvider("provideFetchModeAndScalarResults")]
	public function testFetchMode($mode, $expected): void {
	$actual = $this->db
	->prepare("SELECT :word")
	->with("word", "foo")
	->withFetchMode($mode)
	->query()
	->fetchRow();

	$this->assertEquals($expected, $actual);
	}

	public function testGetUnderlyingStatement () : void {
	$query = $this->db
	->prepare("SELECT :word");

	$this->assertInstanceOf(PDOStatement::class, $query->getUnderlyingStatement());
	}

	public function testToString () : void {
	$query = $this->db
	->prepare("SELECT :word");

	$this->assertEquals("SELECT :word", (string)$query);
	}

	public function testToStringIsInvariant () : void {
	$query = $this->db
	->prepare("SELECT :word")
	->with("word", "foo");

	$this->assertEquals("SELECT :word", (string)$query);
	}

	public function testQueryWithError () : void {
	$this->expectException(SqlException::class);

	$sql = "SELECT * FROM nonexisting";
	$result = $this->db->prepare($sql)->query();

	$this->assertNull($result);
	}

	public function testQueryWithErrorWhenExceptionsAreDisabled () : void {
	$this->db->dontThrowExceptions = true;

	$sql = "SELECT * FROM nonexisting";
	$result = $this->db->prepare($sql)->query();

	$this->assertNull($result);
	}

	}

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