Add test cases for ErrorHandler (#14)

Author: Firehed

tests/ErrorHandlerTest.php

@@ -0,0 +1,63 @@
+<?php
+declare(strict_types=1);
+
+namespace Firehed\API;
+
+use ErrorException;
+use Exception;
+use Psr\Log\LoggerInterface;
+
+/**
+ * @coversDefaultClass Firehed\API\ErrorHandler
+ * @covers ::<protected>
+ * @covers ::<private>
+ */
+class ErrorHandlerTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @covers ::__construct
+     */
+    public function testConstruct()
+    {
+        $this->assertInstanceOf(
+            ErrorHandler::class,
+            new ErrorHandler($this->createMock(LoggerInterface::class))
+        );
+    }
+
+    /**
+     * @covers ::handleThrowable
+     * @runInSeparateProcess
+     */
+    public function testHandleThrowable()
+    {
+        $logger = $this->createMock(LoggerInterface::class);
+        $logger->expects($this->atLeastOnce())
+            ->method('error');
+
+        $handler = new ErrorHandler($logger);
+        $handler->handleThrowable(new Exception());
+    }
+
+    /**
+     * @covers ::handleError
+     */
+    public function testHandleError()
+    {
+        $handler = new ErrorHandler($this->createMock(LoggerInterface::class));
+        $this->expectException(ErrorException::class);
+        $handler->handleError(\E_ERROR, 'Some error', __FILE__, __LINE__);
+    }
+
+    /**
+     * @covers ::handleError
+     * @doesNotPerformAssertions
+     */
+    public function testHandleErrorDoesNotThrowWithErrorReportingDisabled()
+    {
+        $handler = new ErrorHandler($this->createMock(LoggerInterface::class));
+        // @ turns error_reporting() to 0 for the next line. The error handler
+        // should respect this.
+        @$handler->handleError(\E_ERROR, 'Some error', __FILE__, __LINE__);
+    }
+}