Add tests (unit / integration) for new render_patterns command

Author: thibaudcolas

tests/tests/test_commands.py

@@ -0,0 +1,78 @@
+import io
+
+import tempfile
+from pathlib import Path
+import shutil
+
+from django.test import SimpleTestCase
+from django.core.management import call_command
+
+
+class RenderPatternsTests(SimpleTestCase):
+    """Tests of the render_pattern command’s output, based on the test project’s templates"""
+
+    def test_displays_patterns(self):
+        stdout = io.StringIO()
+        call_command('render_patterns', dry_run=True, stdout=stdout)
+        stdout = stdout.getvalue()
+        self.assertIn("""patterns/atoms/tags_test_atom/tags_test_atom.html
+patterns/atoms/test_atom/test_atom.html
+""", stdout)
+
+    def test_verbose_output(self):
+        stdout = io.StringIO()
+        call_command('render_patterns', dry_run=True, stdout=stdout, verbosity=2)
+        stdout = stdout.getvalue()
+        self.assertIn("""Target directory: dpl-rendered-patterns
+Group: atoms
+Group: tags_test_atom
+Pattern: tags_test_atom.html
+patterns/atoms/tags_test_atom/tags_test_atom.html
+
+
+SANDWICH
+SANDNoneWICH
+SAND0WICH
+""", stdout)
+
+    def test_quiet_output(self):
+        stdout = io.StringIO()
+        call_command('render_patterns', dry_run=True, stdout=stdout, verbosity=0)
+        stdout = stdout.getvalue()
+        self.assertEqual(stdout, '')
+
+    def test_shows_output_folder(self):
+        stdout = io.StringIO()
+        temp = tempfile.gettempdir()
+        call_command('render_patterns', dry_run=True, stdout=stdout, output=temp, verbosity=2)
+        stdout = stdout.getvalue()
+        self.assertIn(temp, stdout)
+
+
+class RenderPatternsFileSystemTests(SimpleTestCase):
+    """Tests of the render_pattern command’s file system changes, based on the test project’s templates"""
+
+    def setUp(self):
+        self.output = tempfile.mkdtemp()
+
+    def tearDown(self):
+        shutil.rmtree(self.output)
+
+    def test_uses_output(self):
+        stdout = io.StringIO()
+        modification_time_before = Path(self.output).stat().st_mtime
+        call_command('render_patterns', dry_run=False, stdout=stdout, output=self.output)
+        self.assertNotEqual(Path(self.output).stat().st_mtime, modification_time_before)
+        stdout = stdout.getvalue()
+
+    def test_uses_subfolders(self):
+        stdout = io.StringIO()
+        call_command('render_patterns', dry_run=False, stdout=stdout, output=self.output)
+        subfolders = Path(self.output).iterdir()
+        self.assertIn('atoms', [p.name for p in subfolders])
+
+    def test_outputs_html(self):
+        stdout = io.StringIO()
+        call_command('render_patterns', dry_run=False, stdout=stdout, output=self.output)
+        html_files = Path(self.output).glob('**/*.html')
+        self.assertIn('test_atom.html', [p.name for p in html_files])