Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
| 1 | <?php |
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| 15 | /** |
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| 16 | * @covers Jasny\ErrorHandler |
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| 17 | */ |
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| 18 | class ErrorHandlerTest extends \PHPUnit_Framework_TestCase |
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| 19 | { |
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| 20 | /** |
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| 21 | * @var ErrorHandler|MockObject |
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| 22 | */ |
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| 23 | protected $errorHandler; |
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| 24 | |||
| 25 | public function setUp() |
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| 26 | { |
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| 27 | $this->errorHandler = $this->getMockBuilder(ErrorHandler::class) |
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| 28 | ->setMethods(['errorReporting', 'errorGetLast', 'setErrorHandler', 'registerShutdownFunction', |
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| 29 | 'clearOutputBuffer']) |
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| 30 | ->getMock(); |
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| 31 | } |
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| 32 | |||
| 33 | /** |
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| 34 | * Test invoke with invalid 'next' param |
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| 35 | * |
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| 36 | * @expectedException \InvalidArgumentException |
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| 37 | */ |
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| 38 | public function testInvokeInvalidNext() |
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| 39 | { |
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| 40 | $request = $this->createMock(ServerRequestInterface::class); |
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| 41 | $response = $this->createMock(ResponseInterface::class); |
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| 42 | |||
| 43 | $errorHandler = $this->errorHandler; |
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| 44 | |||
| 45 | $errorHandler($request, $response, 'not callable'); |
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| 46 | } |
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| 47 | |||
| 48 | /** |
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| 49 | * Test case when there is no error |
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| 50 | */ |
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| 51 | public function testInvokeNoError() |
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| 52 | { |
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| 53 | $request = $this->createMock(ServerRequestInterface::class); |
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| 54 | $response = $this->createMock(ResponseInterface::class); |
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| 55 | $finalResponse = $this->createMock(ResponseInterface::class); |
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| 56 | |||
| 57 | $next = $this->getMockBuilder(\stdClass::class)->setMethods(['__invoke'])->getMock(); |
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| 58 | $next->expects($this->once())->method('__invoke') |
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| 59 | ->with($request, $response) |
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| 60 | ->willReturn($finalResponse); |
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| 61 | |||
| 62 | $errorHandler = $this->errorHandler; |
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| 63 | |||
| 64 | $result = $errorHandler($request, $response, $next); |
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| 65 | |||
| 66 | $this->assertSame($finalResponse, $result); |
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| 67 | } |
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| 68 | |||
| 69 | /** |
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| 70 | * Test that Exception in 'next' callback is caught |
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| 71 | */ |
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| 72 | public function testInvokeCatchException() |
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| 73 | { |
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| 74 | $request = $this->createMock(ServerRequestInterface::class); |
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| 75 | $response = $this->createMock(ResponseInterface::class); |
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| 76 | $errorResponse = $this->createMock(ResponseInterface::class); |
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| 77 | $stream = $this->createMock(StreamInterface::class); |
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| 78 | |||
| 79 | $exception = $this->createMock(\Exception::class); |
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| 80 | |||
| 81 | $stream->expects($this->once())->method('write')->with('Unexpected error'); |
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| 82 | $response->expects($this->once())->method('withStatus')->with(500)->willReturn($errorResponse); |
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| 83 | |||
| 84 | $errorResponse->expects($this->once())->method('getBody')->willReturn($stream); |
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| 85 | |||
| 86 | $next = $this->getMockBuilder(\stdClass::class)->setMethods(['__invoke'])->getMock(); |
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| 87 | $next->expects($this->once())->method('__invoke') |
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| 88 | ->with($request, $response) |
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| 89 | ->willThrowException($exception); |
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| 90 | |||
| 91 | $errorHandler = $this->errorHandler; |
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| 92 | |||
| 93 | $result = $errorHandler($request, $response, $next); |
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| 94 | |||
| 95 | $this->assertSame($errorResponse, $result); |
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| 96 | $this->assertSame($exception, $errorHandler->getError()); |
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| 97 | } |
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| 98 | |||
| 99 | /** |
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| 100 | * Test that an error in 'next' callback is caught |
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| 101 | */ |
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| 102 | public function testInvokeCatchError() |
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| 103 | { |
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| 104 | if (!class_exists('Error')) { |
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| 105 | $this->markTestSkipped(PHP_VERSION . " doesn't throw errors yet"); |
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| 106 | } |
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| 107 | |||
| 108 | $request = $this->createMock(ServerRequestInterface::class); |
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| 109 | $response = $this->createMock(ResponseInterface::class); |
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| 110 | $errorResponse = $this->createMock(ResponseInterface::class); |
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| 111 | $stream = $this->createMock(StreamInterface::class); |
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| 112 | |||
| 113 | $stream->expects($this->once())->method('write')->with('Unexpected error'); |
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| 114 | $response->expects($this->once())->method('withStatus')->with(500)->willReturn($errorResponse); |
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| 115 | |||
| 116 | $errorResponse->expects($this->once())->method('getBody')->willReturn($stream); |
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| 117 | |||
| 118 | $next = $this->getMockBuilder(\stdClass::class)->setMethods(['__invoke'])->getMock(); |
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| 119 | $next->expects($this->once())->method('__invoke') |
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| 120 | ->with($request, $response) |
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| 121 | ->willReturnCallback(function() { |
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| 122 | \this_function_does_not_exist(); |
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| 123 | }); |
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| 124 | |||
| 125 | $errorHandler = $this->errorHandler; |
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| 126 | |||
| 127 | $result = $errorHandler($request, $response, $next); |
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| 128 | |||
| 129 | $this->assertSame($errorResponse, $result); |
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| 130 | |||
| 131 | $error = $errorHandler->getError(); |
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| 132 | $this->assertEquals("Call to undefined function this_function_does_not_exist()", $error->getMessage()); |
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| 133 | } |
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| 134 | |||
| 135 | |||
| 136 | public function testSetLogger() |
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| 137 | { |
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| 138 | $logger = $this->createMock(LoggerInterface::class); |
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| 139 | |||
| 140 | $errorHandler = $this->errorHandler; |
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| 141 | $errorHandler->setLogger($logger); |
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| 142 | |||
| 143 | $this->assertSame($logger, $errorHandler->getLogger()); |
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| 144 | } |
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| 145 | |||
| 146 | |||
| 147 | public function testInvokeLog() |
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| 148 | { |
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| 149 | $request = $this->createMock(ServerRequestInterface::class); |
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| 150 | $response = $this->createMock(ResponseInterface::class); |
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| 151 | $stream = $this->createMock(StreamInterface::class); |
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| 152 | |||
| 153 | $response->method('withStatus')->willReturnSelf(); |
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| 154 | $response->method('getBody')->willReturn($stream); |
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| 155 | |||
| 156 | $exception = $this->createMock(\Exception::class); |
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| 157 | |||
| 158 | $message = $this->stringStartsWith('Uncaught Exception ' . get_class($exception)); |
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| 159 | $context = ['exception' => $exception]; |
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| 160 | |||
| 161 | $logger = $this->createMock(LoggerInterface::class); |
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| 162 | $logger->expects($this->once())->method('log') |
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| 163 | ->with(LogLevel::ERROR, $message, $context); |
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| 164 | |||
| 165 | $errorHandler = $this->errorHandler; |
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| 166 | $errorHandler->setLogger($logger); |
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| 167 | |||
| 168 | $next = $this->getMockBuilder(\stdClass::class)->setMethods(['__invoke'])->getMock(); |
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| 169 | $next->expects($this->once())->method('__invoke') |
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| 170 | ->with($request, $response) |
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| 171 | ->willThrowException($exception); |
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| 172 | |||
| 173 | $errorHandler($request, $response, $next); |
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| 174 | } |
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| 175 | |||
| 176 | public function errorProvider() |
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| 177 | { |
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| 178 | return [ |
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| 179 | [E_ERROR, LogLevel::ERROR, 'Fatal error'], |
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| 180 | [E_USER_ERROR, LogLevel::ERROR, 'Fatal error'], |
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| 181 | [E_RECOVERABLE_ERROR, LogLevel::ERROR, 'Fatal error'], |
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| 182 | [E_WARNING, LogLevel::WARNING, 'Warning'], |
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| 183 | [E_USER_WARNING, LogLevel::WARNING, 'Warning'], |
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| 184 | [E_PARSE, LogLevel::CRITICAL, 'Parse error'], |
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| 185 | [E_NOTICE, LogLevel::NOTICE, 'Notice'], |
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| 186 | [E_USER_NOTICE, LogLevel::NOTICE, 'Notice'], |
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| 187 | [E_CORE_ERROR, LogLevel::CRITICAL, 'Core error'], |
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| 188 | [E_CORE_WARNING, LogLevel::WARNING, 'Core warning'], |
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| 189 | [E_COMPILE_ERROR, LogLevel::CRITICAL, 'Compile error'], |
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| 190 | [E_COMPILE_WARNING, LogLevel::WARNING, 'Compile warning'], |
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| 191 | [E_STRICT, LogLevel::INFO, 'Strict standards'], |
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| 192 | [E_DEPRECATED, LogLevel::INFO, 'Deprecated'], |
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| 193 | [E_USER_DEPRECATED, LogLevel::INFO, 'Deprecated'], |
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| 194 | [99999999, LogLevel::ERROR, 'Unknown error'] |
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| 195 | ]; |
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| 196 | } |
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| 197 | |||
| 198 | /** |
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| 199 | * @dataProvider errorProvider |
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| 200 | * |
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| 201 | * @param int $code |
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| 202 | * @param string $level |
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| 203 | * @param string $type |
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| 204 | */ |
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| 205 | public function testLogError($code, $level, $type) |
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| 206 | { |
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| 207 | $error = new \ErrorException("no good", 0, $code, "foo.php", 42); |
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| 208 | $context = ['error' => $error, 'code' => $code, 'message' => "no good", 'file' => 'foo.php', 'line' => 42]; |
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| 209 | |||
| 210 | $logger = $this->createMock(LoggerInterface::class); |
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| 211 | $logger->expects($this->once())->method('log') |
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| 212 | ->with($level, "$type: no good at foo.php line 42", $context); |
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| 213 | |||
| 214 | $errorHandler = $this->errorHandler; |
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| 215 | $errorHandler->setLogger($logger); |
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| 216 | |||
| 217 | $errorHandler->log($error); |
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| 218 | } |
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| 219 | |||
| 220 | public function testLogException() |
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| 221 | { |
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| 222 | $exception = $this->createMock(\Exception::class); |
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| 223 | |||
| 224 | $message = $this->stringStartsWith('Uncaught Exception ' . get_class($exception)); |
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| 225 | $context = ['exception' => $exception]; |
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| 226 | |||
| 227 | $logger = $this->createMock(LoggerInterface::class); |
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| 228 | $logger->expects($this->once())->method('log') |
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| 229 | ->with(LogLevel::ERROR, $message, $context); |
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| 230 | |||
| 231 | $errorHandler = $this->errorHandler; |
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| 232 | $errorHandler->setLogger($logger); |
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| 233 | |||
| 234 | $errorHandler->log($exception); |
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| 235 | } |
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| 236 | |||
| 237 | public function testLogString() |
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| 238 | { |
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| 239 | $logger = $this->createMock(LoggerInterface::class); |
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| 240 | $logger->expects($this->once())->method('log')->with(LogLevel::WARNING, "Unable to log a string"); |
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| 241 | |||
| 242 | $errorHandler = $this->errorHandler; |
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| 243 | $errorHandler->setLogger($logger); |
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| 534 |