Route for adding new application member

- domain method for creating a new application member
- ApplicationInvitations domain class
- nested form for adding a new user that holds user data, application
  permission sets, and environment roles
- Invitation service can infer invitation type based on role it's given
- new invitation email templates

tests/routes/applications/test_team.py

@@ -1,6 +1,6 @@
 from flask import url_for
 
-from tests.factories import PortfolioFactory, ApplicationFactory
+from tests.factories import PortfolioFactory, ApplicationFactory, UserFactory
 
 
 def test_application_team(client, user_session):
@@ -12,3 +12,43 @@ def test_application_team(client, user_session):
     response = client.get(url_for("applications.team", application_id=application.id))
 
     assert response.status_code == 200
+
+
+def test_create_member(client, user_session):
+    user = UserFactory.create()
+    application = ApplicationFactory.create(
+        environments=[{"name": "Naboo"}, {"name": "Endor"}]
+    )
+    env = application.environments[0]
+
+    user_session(application.portfolio.owner)
+
+    response = client.post(
+        url_for("applications.create_member", application_id=application.id),
+        data={
+            "user_data-first_name": user.first_name,
+            "user_data-last_name": user.last_name,
+            "user_data-dod_id": user.dod_id,
+            "user_data-email": user.email,
+            "environment_roles-0-environment_id": env.id,
+            "environment_roles-0-environment_name": env.name,
+            "environment_roles-0-role": "Basic Access",
+            "permission_sets-perms_env_mgmt": True,
+            "permission_sets-perms_team_mgmt": True,
+            "permission_sets-perms_del_env": True,
+        },
+    )
+
+    assert response.status_code == 302
+    expected_url = url_for(
+        "applications.team",
+        application_id=application.id,
+        fragment="application-members",
+        _anchor="application-members",
+        _external=True,
+    )
+    assert response.location == expected_url
+    assert len(user.application_roles) == 1
+    assert user.application_roles[0].application == application
+    assert len(user.environment_roles) == 1
+    assert user.environment_roles[0].environment == env