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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Cosray\Testing; |
| 6 | |
| 7 | use Celema\Quma\Database as QumaDatabase; |
| 8 | use Override; |
| 9 | use PDO; |
| 10 | use PDOException; |
| 11 | |
| 12 | /** |
| 13 | * The database of an app under test. All instances with the same DSN share |
| 14 | * one connection per process, as opening one costs more than most tests |
| 15 | * take. While a test isolates it, the code under test works inside the |
| 16 | * test's transaction: its own transaction is a savepoint, and the end of a |
| 17 | * request rolls back only what the request left open. |
| 18 | * |
| 19 | * @internal |
| 20 | */ |
| 21 | final class Database extends QumaDatabase |
| 22 | { |
| 23 | private const string SAVEPOINT = 'cosray_testing'; |
| 24 | private const string REQUEST = 'cosray_testing_request'; |
| 25 | |
| 26 | /** @var array<string, PDO> */ |
| 27 | private static array $connections = []; |
| 28 | |
| 29 | private bool $isolated = false; |
| 30 | |
| 31 | /** Whether the code under test opened its transaction. */ |
| 32 | private bool $nested = false; |
| 33 | |
| 34 | #[Override] |
| 35 | public function connect(): static |
| 36 | { |
| 37 | if ($this->pdo !== null) { |
| 38 | return $this; |
| 39 | } |
| 40 | |
| 41 | $config = $this->conn->config; |
| 42 | $key = serialize([$config->dsn, $config->pdo->username, $config->pdo->effectiveOptions($config->driver)]); |
| 43 | $shared = self::$connections[$key] ?? null; |
| 44 | |
| 45 | if ($shared === null) { |
| 46 | parent::connect(); |
| 47 | self::$connections[$key] = $this->getConn(); |
| 48 | |
| 49 | return $this; |
| 50 | } |
| 51 | |
| 52 | $this->pdo = $shared; |
| 53 | $this->markConnected(); |
| 54 | |
| 55 | return $this; |
| 56 | } |
| 57 | |
| 58 | /** Opens the test's transaction, which holds everything until discard(). */ |
| 59 | public function isolate(): void |
| 60 | { |
| 61 | parent::begin(); |
| 62 | $this->isolated = true; |
| 63 | $this->nested = false; |
| 64 | } |
| 65 | |
| 66 | /** Rolls back the test's transaction and all the work in it. */ |
| 67 | public function discard(): void |
| 68 | { |
| 69 | $this->isolated = false; |
| 70 | $this->nested = false; |
| 71 | |
| 72 | if ($this->pdo?->inTransaction()) { |
| 73 | $this->pdo->rollBack(); |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Runs a request in a savepoint. A statement that fails outside the code's |
| 79 | * own transaction aborts PostgreSQL's transaction; without a test it would |
| 80 | * fail alone, so the request's work is undone and the test can go on. |
| 81 | * |
| 82 | * @template T |
| 83 | * |
| 84 | * @param callable(): T $request |
| 85 | * @return T |
| 86 | */ |
| 87 | public function request(callable $request): mixed |
| 88 | { |
| 89 | if (!$this->isolated) { |
| 90 | return $request(); |
| 91 | } |
| 92 | |
| 93 | $pdo = $this->getConn(); |
| 94 | $pdo->exec('SAVEPOINT ' . self::REQUEST); |
| 95 | |
| 96 | try { |
| 97 | return $request(); |
| 98 | } finally { |
| 99 | try { |
| 100 | $pdo->exec('RELEASE SAVEPOINT ' . self::REQUEST); |
| 101 | } catch (PDOException) { |
| 102 | $pdo->exec('ROLLBACK TO SAVEPOINT ' . self::REQUEST); |
| 103 | $pdo->exec('RELEASE SAVEPOINT ' . self::REQUEST); |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | #[Override] |
| 109 | public function begin(): bool |
| 110 | { |
| 111 | if (!$this->isolated) { |
| 112 | return parent::begin(); |
| 113 | } |
| 114 | |
| 115 | if ($this->nested) { |
| 116 | throw new PDOException('There is already an active transaction'); |
| 117 | } |
| 118 | |
| 119 | $this->getConn()->exec('SAVEPOINT ' . self::SAVEPOINT); |
| 120 | $this->nested = true; |
| 121 | |
| 122 | return true; |
| 123 | } |
| 124 | |
| 125 | #[Override] |
| 126 | public function commit(): bool |
| 127 | { |
| 128 | if (!$this->isolated) { |
| 129 | return parent::commit(); |
| 130 | } |
| 131 | |
| 132 | $this->end('RELEASE SAVEPOINT ' . self::SAVEPOINT); |
| 133 | |
| 134 | return true; |
| 135 | } |
| 136 | |
| 137 | #[Override] |
| 138 | public function rollback(): bool |
| 139 | { |
| 140 | if (!$this->isolated) { |
| 141 | return parent::rollback(); |
| 142 | } |
| 143 | |
| 144 | $this->end('ROLLBACK TO SAVEPOINT ' . self::SAVEPOINT, 'RELEASE SAVEPOINT ' . self::SAVEPOINT); |
| 145 | |
| 146 | return true; |
| 147 | } |
| 148 | |
| 149 | #[Override] |
| 150 | public function reset(): bool |
| 151 | { |
| 152 | if (!$this->isolated) { |
| 153 | return parent::reset(); |
| 154 | } |
| 155 | |
| 156 | if ($this->nested) { |
| 157 | $this->rollback(); |
| 158 | } |
| 159 | |
| 160 | return true; |
| 161 | } |
| 162 | |
| 163 | #[Override] |
| 164 | public function disconnect(): void |
| 165 | { |
| 166 | if ($this->isolated) { |
| 167 | $this->reset(); |
| 168 | |
| 169 | return; |
| 170 | } |
| 171 | |
| 172 | parent::disconnect(); |
| 173 | } |
| 174 | |
| 175 | private function end(string ...$statements): void |
| 176 | { |
| 177 | if (!$this->nested) { |
| 178 | throw new PDOException('There is no active transaction'); |
| 179 | } |
| 180 | |
| 181 | $this->nested = false; |
| 182 | $pdo = $this->getConn(); |
| 183 | |
| 184 | foreach ($statements as $statement) { |
| 185 | $pdo->exec($statement); |
| 186 | } |
| 187 | } |
| 188 | } |