add assertHeaderContain() method for asserts that the response contains the given header and contains the optional value.

Author: huangzhhui

src/Testing/Base/ResponseAssertTrait.php

@@ -63,6 +63,27 @@ public function assertHeader($headerName, $value = null)
         return $this;
     }
 
+    /**
+     * Asserts that the response contains the given header and contains the optional value.
+     *
+     * @param  string $headerName
+     * @param  mixed  $value
+     * @return $this
+     * @throws \PHPUnit_Framework_AssertionFailedError
+     */
+    public function assertHeaderContain($headerName, $value = null)
+    {
+        PHPUnit::assertTrue($this->hasHeader($headerName), "Header [{$headerName}] not present on response.");
+
+        $actual = $this->getHeaderLine($headerName);
+
+        if (null !== $value) {
+            PHPUnit::assertContains($value, $this->getHeaderLine($headerName), "Header [{$headerName}] was found, but value [{$actual}] does not contain [{$value}].");
+        }
+
+        return $this;
+    }
+
     /**
      * Assert that the given string is contained within the response.
      *