added unit test for post

amanuensis/backend/post.py

@@ -23,8 +23,8 @@ def create(
         raise ArgumentError('Lexicon id must be an integer.')
     
     # Verify user_id
-    if not isinstance(user_id, int):
+    if not (isinstance(user_id, int) or user_id is None):
-        raise ArgumentError('Lexicon id must ne an integer.')
+        raise ArgumentError('User id must be an integer.')
 
     # Verify body
     if not isinstance(body, str):

tests/test_post.py

@@ -0,0 +1,46 @@
+import pytest
+
+from amanuensis.db import *
+import amanuensis.backend.lexicon as lexiq
+import amanuensis.backend.post as postq
+from amanuensis.errors import ArgumentError
+
+from .test_db import db
+
+def test_create_post(db):
+    """Test new post creation"""
+    kwargs = {
+        'lexicon_id': 0,
+        'user_id': 0,
+        'body': 'body'
+    }
+
+    # Test ids are integers
+    with pytest.raises(ArgumentError):
+        postq.create(db, **{**kwargs, 'user_id': 'zero'})
+    with pytest.raises(ArgumentError):
+        postq.create(db, **{**kwargs, 'lexicon_id': 'zero'})
+
+    # test empty arguments
+    with pytest.raises(ArgumentError):
+        postq.create(db, **{**kwargs, 'lexicon_id': ''})
+    with pytest.raises(ArgumentError):
+        postq.create(db, **{**kwargs, 'user_id': ''})
+    with pytest.raises(ArgumentError):
+        postq.create(db, **{**kwargs, 'body': ''})
+    
+    # check whitespace
+    with pytest.raises(ArgumentError):
+        postq.create(db, **{**kwargs, 'body': '    '})
+
+    # post creation works and populates fields
+    new_post = postq.create(db, **kwargs)
+    assert new_post
+    assert new_post.lexicon_id is not None
+    assert new_post.user_id is not None
+    assert new_post.body is not None
+
+    # post creation works when user is None
+    new_post = postq.create(db, **{**kwargs, 'user_id': None})
+    assert new_post
+    assert new_post.user_id is None