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<?php |
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namespace JVelasco\CircuitBreaker; |
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use Exception; |
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use PHPUnit\Framework\TestCase; |
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class CircuitBreakerTest extends TestCase |
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{ |
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/** @test */ |
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public function it_delegates_to_strategy_for_availability() |
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{ |
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$strategy = $this->prophesize(AvailabilityStrategy::class); |
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$anAvailableService = "available"; |
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$strategy->isAvailable($anAvailableService)->willReturn(true); |
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$aNotAvailableService = "not available"; |
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$strategy->isAvailable($aNotAvailableService)->willReturn(false); |
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$circuitBreaker = new CircuitBreaker( |
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$strategy->reveal(), |
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$this->prophesize(FailuresCounterStorage::class)->reveal() |
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); |
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$this->assertTrue($circuitBreaker->isAvailable($anAvailableService)); |
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$this->assertFalse($circuitBreaker->isAvailable($aNotAvailableService)); |
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} |
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/** @test */ |
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public function it_delegates_to_storage_counter_for_failures() |
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{ |
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$storage = $this->prophesize(FailuresCounterStorage::class); |
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$aService = "a service"; |
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$storage->incrementFailures($aService)->shouldBeCalledTimes(1); |
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$circuitBreaker = new CircuitBreaker( |
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$this->prophesize(AvailabilityStrategy::class)->reveal(), |
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$storage->reveal() |
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); |
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$circuitBreaker->reportFailure($aService); |
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} |
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/** @test */ |
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public function it_delegates_to_storage_counter_for_successes() |
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{ |
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$storage = $this->prophesize(FailuresCounterStorage::class); |
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$aService = "a service"; |
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$storage->decrementFailures($aService)->shouldBeCalledTimes(1); |
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$circuitBreaker = new CircuitBreaker( |
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$this->prophesize(AvailabilityStrategy::class)->reveal(), |
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$storage->reveal() |
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); |
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$circuitBreaker->reportSuccess($aService); |
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} |
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/** @test */ |
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public function it_throw_custom_exceptions_from_storage_increment_failures() |
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{ |
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$storage = $this->prophesize(FailuresCounterStorage::class); |
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$circuitBreaker = new CircuitBreaker( |
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$this->prophesize(AvailabilityStrategy::class)->reveal(), |
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$storage->reveal() |
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); |
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$aService = "a service"; |
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$storage->incrementFailures($aService)->willThrow(new Exception); |
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$this->expectException(StorageException::class); |
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$circuitBreaker->reportFailure($aService); |
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$storage->decrementFailures($aService)->willThrow(new Exception); |
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$this->expectException(StorageException::class); |
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$this->expectExceptionMessage("Error incrementing failures"); |
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$circuitBreaker->reportSuccess($aService); |
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} |
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/** @test */ |
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public function it_throw_custom_exceptions_from_storage_decrement_failures() |
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{ |
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$storage = $this->prophesize(FailuresCounterStorage::class); |
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$circuitBreaker = new CircuitBreaker( |
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$this->prophesize(AvailabilityStrategy::class)->reveal(), |
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$storage->reveal() |
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); |
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$aService = "a service"; |
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$storage->decrementFailures($aService)->willThrow(new Exception); |
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$this->expectException(StorageException::class); |
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$this->expectExceptionMessage("Error decrementing failures"); |
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$circuitBreaker->reportSuccess($aService); |
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} |
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} |
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j-velasco /
php-circuit-breaker
