Initial unit tests against our Sanic app

Refs #50

I had to disable the build metadata function to get these tests to work
sensibly. I need to completely rethink how that mechanism works.

datasette/app.py

@@ -34,7 +34,7 @@ SQL_TIME_LIMIT_MS = 1000
 connections = threading.local()
 
 
-def ensure_build_metadata(files, regenerate=False):
+def ensure_build_metadata(files, regenerate=True):
     build_metadata = app_root / BUILD_METADATA
     if build_metadata.exists() and not regenerate:
         return json.loads(build_metadata.read_text())

setup.py

@@ -18,5 +18,8 @@ setup(
         datasette=datasette.cli:cli
     ''',
     setup_requires=['pytest-runner'],
-    tests_require=['pytest'],
+    tests_require=[
+        'pytest==3.2.3',
+        'aiohttp==2.3.2',
+    ],
 )

tests/test_app.py

@@ -0,0 +1,60 @@
+from datasette.app import Datasette
+import os
+import pytest
+import sqlite3
+import tempfile
+
+
+@pytest.fixture(scope='module')
+def three_table_app_client():
+    with tempfile.TemporaryDirectory() as tmpdir:
+        filepath = os.path.join(tmpdir, 'three_tables.db')
+        conn = sqlite3.connect(filepath)
+        conn.executescript(THREE_TABLES)
+        os.chdir(os.path.dirname(filepath))
+        yield Datasette([filepath]).app().test_client
+
+
+def test_homepage(three_table_app_client):
+    _, response = three_table_app_client.get('/')
+    assert response.status == 200
+    assert 'three_tables' in response.text
+
+    # Now try the JSON
+    _, response = three_table_app_client.get('/.json')
+    assert response.status == 200
+    assert response.json.keys() == {'three_tables': 0}.keys()
+    d = response.json['three_tables']
+    assert d['name'] == 'three_tables'
+    assert d['tables_count'] == 3
+
+
+def test_database_page(three_table_app_client):
+    _, response = three_table_app_client.get('/three_tables', allow_redirects=False)
+    assert response.status == 302
+    _, response = three_table_app_client.get('/three_tables')
+    assert 'three_tables' in response.text
+
+
+
+
+THREE_TABLES = '''
+CREATE TABLE simple_primary_key (
+  pk varchar(30) primary key,
+  content text
+);
+
+CREATE TABLE compound_primary_key (
+  pk1 varchar(30),
+  pk2 varchar(30),
+  content text,
+  PRIMARY KEY (pk1, pk2)
+);
+
+CREATE TABLE no_primary_key (
+  content text
+);
+
+INSERT INTO simple_primary_key VALUES (1, 'hello');
+INSERT INTO simple_primary_key VALUES (2, 'world');
+'''