added response provider tests

tests/providers/test_start_response.py

@@ -0,0 +1,36 @@
+from masonite.providers.StartResponseProvider import StartResponseProvider
+from masonite.request import Request
+from masonite.testsuite.TestSuite import WSGI_REQUEST
+from masonite.app import App
+from masonite.exceptions import ResponseError
+import pytest
+
+class TestResponseProvider:
+
+    def setup_method(self):
+        self.app = App()
+        self.provider = StartResponseProvider()
+
+        self.app.bind('Response', None)
+        self.app.bind('Request', Request(WSGI_REQUEST))
+        self.app.bind('Headers', [])
+
+        self.provider.app = self.app
+
+    def test_response_boot_throws_response_exception(self):
+        with pytest.raises(ResponseError):
+            self.provider.boot(self.app.make('Request'), self.app.make('Response'), self.app.make('Headers'))
+
+    def test_response_encodes_header_response_to_bytes(self):
+        encoded_bytes = bytes('test', 'utf-8')
+        self.app.bind('Response', 'test')
+
+        self.provider.boot(self.app.make('Request'), self.app.make('Response'), self.app.make('Headers'))
+
+        assert self.app.make('Headers')[0] == ("Content-Length", str(len(encoded_bytes)))
+
+    def test_redirect_sets_redirection_headers(self):
+        self.app.make('Request').redirect_url = '/redirection'
+        self.provider.boot(self.app.make('Request'), self.app.make('Response'), self.app.make('Headers'))
+        assert self.app.make('StatusCode') == '302 OK'
+        assert ('Location', '/redirection') in self.app.make('Headers')