Added first tests.

tests.py

@@ -1,3 +1,36 @@
 import unittest
+from StringIO import StringIO
+from httpie import httpie
 
 
+def http(*args, **kwargs):
+    stdout = StringIO()
+    httpie.main(args=args, stdout=stdout,
+                stdin_isatty=True,
+                stdout_isatty=False)
+    return stdout.getvalue()
+
+
+# TODO: moar!
+
+class TestHTTPie(unittest.TestCase):
+
+    def test_get(self):
+        http('GET', 'http://httpbin.org/get')
+
+    def test_json(self):
+        response = http('POST', 'http://httpbin.org/post', 'foo=bar')
+        self.assertIn('"foo": "bar"', response)
+
+    def test_form(self):
+        response = http('POST', '--form', 'http://httpbin.org/post', 'foo=bar')
+        self.assertIn('"foo": "bar"', response)
+
+    def test_headers(self):
+        response = http('GET', 'http://httpbin.org/headers', 'Foo:bar')
+        self.assertIn('"User-Agent": "HTTPie', response)
+        self.assertIn('"Foo": "bar"', response)
+
+
+if __name__ == '__main__':
+    unittest.main()