Add endpoints for forgot-password.

tests/app/main/views/test_forgot_password.py

@@ -0,0 +1,16 @@
+from flask import current_app
+
+
+def test_should_render_forgot_password(notifications_admin, notifications_admin_db, notify_db_session):
+    response = notifications_admin.test_client().get('/forgot-password')
+    assert response.status_code == 200
+    assert 'If you have forgotten your password, we can send you an email to create a new password.' \
+           in response.get_data(as_text=True)
+
+
+def test_should_return_400_when_email_is_invalid(notifications_admin, notifications_admin_db, notify_db_session):
+    response = notifications_admin.test_client().post('/forgot-password',
+                                                      data={'email_address': 'not_a_valid_email'})
+    x = current_app._get_current_object()
+    assert response.status_code == 400
+    assert 'Please enter a valid email address' in response.get_data(as_text=True)