test for checking deletion of orphaned langs

tests/unit/test_routes/test_resource_update.py

@@ -282,3 +282,57 @@ def test_update_votes_authorization_header(
     assert (response.status_code == 200)
     assert (response.json['resource'].get(f"{UPVOTE}s") == initial_upvotes)
     assert (response.json['resource'].get(f"{DOWNVOTE}s") == initial_downvotes + 1)
+
+
+def test_delete_unused_languages(module_client, module_db, fake_auth_from_oc, fake_algolia_save):
+    client = module_client
+    apikey = get_api_key(client)
+
+    # Happy Path
+    response = update_resource(client, apikey)
+    assert (response.status_code == 200)
+    assert (response.json['resource'].get('name') == "New name")
+
+    #Initial Data
+    name = "Language Test"
+    url = None
+    category = None
+    #Random Language DS/AI
+    languages = ["Python", "DS/AI"]
+    paid = None
+    notes = None
+
+    #Update response
+    response = update_resource(client,
+                               apikey,
+                               name,
+                               url,
+                               category,
+                               languages,
+                               paid,
+                               notes)
+    #Check update
+    assert (response.status_code == 200)
+    assert(response.json['resource'].get('name') == "Language Test")
+    languages_response = response.json['resource'].get('languages')
+    assert("Python" in languages_response)
+    assert("DS/AI" in languages_response)
+
+    #Update Languages split remove DS/AI and add JavaScriptmake
+    languages.append("JavaScript")
+    languages.append("HTML")
+    languages.remove("DS/AI")
+    response = update_resource(client, apikey, name, url,
+                               category, languages, paid, notes)
+    #Check Update of Languages
+    assert(response.status_code == 200)
+    languages_response = response.json['resource'].get('languages')
+    assert("Python" in languages_response)
+    assert("JavaScript" in languages_response)
+    assert("HTML" in languages_response)
+    assert("DS/AI" not in languages_response)
+
+    db_languages = client.get('api/v1/languages')
+    db_languages = [language.get('name') for language in db_languages.json['languages']]
+
+    assert("DS/AI" not in db_languages)