HTTP: Add unit tests for `wp_get_http_headers()` and `wp_remote_retrieve_headers()`.

Props borgesbruno, jipmoors.
Fixes #37090.

git-svn-id: https://develop.svn.wordpress.org/trunk@37907 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/http/getHttpHeaders.php

@@ -0,0 +1,69 @@
+<?php
+
+/**
+ * @group http
+ */
+class Tests_HTTP_GetHttpHeaders extends WP_UnitTestCase {
+
+	/**
+	 * Set up the environment
+	 */
+	public function setUp() {
+		parent::setUp();
+
+		// Hook a fake HTTP request response.
+		add_filter( 'pre_http_request', array( $this, 'fake_http_request' ), 10, 3 );
+	}
+
+	/**
+	 * Clean up environment
+	 */
+	public function tearDown() {
+		parent::tearDown();
+
+		// Clear the hook for the fake HTTP request response.
+		remove_filter( 'pre_http_request', array( $this, 'fake_http_request' ) );
+	}
+
+	/**
+	 * Test with a valid URL
+	 */
+	public function test_wp_get_http_headers_valid_url() {
+		$result = wp_get_http_headers( 'http://example.com' );
+		$this->assertTrue( $result );
+	}
+
+	/**
+	 * Test with an invalid URL
+	 */
+	public function test_wp_get_http_headers_invalid_url() {
+		$result = wp_get_http_headers( 'not_an_url' );
+		$this->assertFalse( $result );
+	}
+
+	/**
+	 * Test to see if the deprecated argument is working
+	 */
+	public function test_wp_get_http_headers_deprecated_argument() {
+		$this->setExpectedDeprecated( 'wp_get_http_headers' );
+
+		wp_get_http_headers( 'does_not_matter', $deprecated = true );
+	}
+
+	/**
+	 * Mock the HTTP request response
+	 *
+	 * @param bool   $false     False.
+	 * @param array  $arguments Request arguments.
+	 * @param string $url       Request URL.
+	 *
+	 * @return array|bool
+	 */
+	public function fake_http_request( $false, $arguments, $url ) {
+		if ( 'http://example.com' === $url ) {
+			return array( 'headers' => true );
+		}
+
+		return false;
+	}
+}

tests/phpunit/tests/http/remoteRetrieveHeaders.php

@@ -0,0 +1,38 @@
+<?php
+
+/**
+ * @group http
+ */
+class Tests_HTTP_RemoteRetrieveHeaders extends WP_UnitTestCase {
+
+	/**
+	 * Valid response
+	 */
+	function test_remote_retrieve_headers_valid_response() {
+		$headers = 'headers_data';
+		$response = array( 'headers' => $headers );
+
+		$result = wp_remote_retrieve_headers( $response );
+		$this->assertEquals( $headers, $result );
+	}
+
+	/**
+	 * Response is a WP_Error
+	 */
+	function test_remote_retrieve_headers_is_error() {
+		$response = new WP_Error( 'Some error' );
+
+		$result = wp_remote_retrieve_headers( $response );
+		$this->assertEquals( array(), $result );
+	}
+
+	/**
+	 * Response does not contain 'headers'
+	 */
+	function test_remote_retrieve_headers_invalid_response() {
+		$response = array( 'no_headers' => 'set');
+
+		$result = wp_remote_retrieve_headers( $response );
+		$this->assertEquals( array(), $result );
+	}
+}