Add more assertion methods.

src/TestSuite/IntegrationTestCase.php

@@ -312,6 +312,44 @@ public function assertRedirect($url, $message = '') {
 		$this->assertEquals(Router::url($url, ['_full' => true]), $result['Location'], $message);
 	}
 
+/**
+ * Assert response headers
+ *
+ * @param string $header The header to check
+ * @param string $content The content to check for.
+ * @param string $message The failure message that will be appended to the generated message.
+ * @return void
+ */
+	public function assertHeader($header, $content, $message = '') {
+		if (!$this->_response) {
+			$this->fail('No response set, cannot assert headers. ' . $message);
+		}
+		$headers = $this->_response->header();
+		if (!isset($headers[$header])) {
+			$this->fail("The '$header' header is not set. " . $message);
+		}
+		$this->assertEquals($headers[$header], $content, $message);
+	}
+
+/**
+ * Assert content type
+ *
+ * @param string $type The content-type to check for.
+ * @param string $message The failure message that will be appended to the generated message.
+ * @return void
+ */
+	public function assertContentType($type, $message = '') {
+		if (!$this->_response) {
+			$this->fail('No response set, cannot assert content-type. ' . $message);
+		}
+		$alias = $this->_response->getMimeType($type);
+		if ($alias !== false) {
+			$type = $alias;
+		}
+		$result = $this->_response->type();
+		$this->assertEquals($type, $result, $message);
+	}
+
 /**
  * Assert content exists in the response body.
  *

tests/TestCase/TestSuite/IntegrationTestCaseTest.php

@@ -118,6 +118,31 @@ public function testAssertRedirect() {
 		$this->assertRedirect(['controller' => 'Tasks', 'action' => 'index']);
 	}
 
+/**
+ * Test the header assertino
+ *
+ * @return void
+ */
+	public function testAssertHeader() {
+		$this->_response = new Response();
+		$this->_response->header('Etag', 'abc123');
+
+		$this->assertHeader('Etag', 'abc123');
+	}
+
+/**
+ * Test the content type assertino
+ *
+ * @return void
+ */
+	public function testAssertContentType() {
+		$this->_response = new Response();
+		$this->_response->type('json');
+
+		$this->assertContentType('json');
+		$this->assertContentType('application/json');
+	}
+
 /**
  * Test the content assertion.
  *