Actually add the proxy tests

tests/Proxy/HTTP.php

@@ -0,0 +1,46 @@
+<?php
+
+class RequestsTest_Proxy_HTTP extends PHPUnit_Framework_TestCase {
+	public function testConnectWithString() {
+		$options = array(
+			'proxy' => '127.0.0.1:8080'
+		);
+		$response = Requests::get(httpbin('/get'), array(), $options);
+		$this->assertEquals('http', $response->headers['x-requests-proxied']);
+
+		$data = json_decode($response->body, true);
+		$this->assertEquals('http', $data['headers']['X-Requests-Proxy']);
+	}
+
+	public function testConnectWithArray() {
+		$options = array(
+			'proxy' => array('127.0.0.1:8080')
+		);
+		$response = Requests::get(httpbin('/get'), array(), $options);
+		$this->assertEquals('http', $response->headers['x-requests-proxied']);
+
+		$data = json_decode($response->body, true);
+		$this->assertEquals('http', $data['headers']['X-Requests-Proxy']);
+	}
+
+	/**
+	 * @expectedException Requests_Exception
+	 */
+	public function testConnectInvalidParameters() {
+		$options = array(
+			'proxy' => array('127.0.0.1:8080', 'testuser', 'password', 'something')
+		);
+		$response = Requests::get(httpbin('/get'), array(), $options);
+	}
+
+	public function testConnectWithInstance() {
+		$options = array(
+			'proxy' => '127.0.0.1:8080'
+		);
+		$response = Requests::get(httpbin('/get'), array(), $options);
+		$this->assertEquals('http', $response->headers['x-requests-proxied']);
+
+		$data = json_decode($response->body, true);
+		$this->assertEquals('http', $data['headers']['X-Requests-Proxy']);
+	}
+}