add first snapshot tests

nf_core/__main__.py

@@ -521,6 +521,7 @@ def create_pipeline(ctx, name, description, author, version, force, outdir, temp
         )
         app = PipelineCreateApp()
         app.run()
+        sys.exit(app.return_code or 0)
 
 
 # nf-core create (deprecated)
@@ -582,6 +583,7 @@ def create(name, description, author, version, force, outdir, template_yaml, pla
             app = PipelineCreateApp()
             try:
                 app.run()
+                sys.exit(app.return_code or 0)
             except UserWarning as e:
                 log.error(e)
                 sys.exit(1)

nf_core/pipelines/create/__init__.py

@@ -75,7 +75,7 @@ def on_button_pressed(self, event: Button.Pressed) -> None:
         elif event.button.id == "close_screen":
             self.switch_screen("github_repo")
         if event.button.id == "close_app":
-            self.exit()
+            self.exit(return_code=0)
 
     def action_toggle_dark(self) -> None:
         """An action to toggle dark mode."""

requirements-dev.txt

@@ -10,3 +10,4 @@ textual-dev>=1.2.1
 mypy
 types-PyYAML
 types-requests
+pytest-textual-snapshot

tests/test_create_app.py

@@ -0,0 +1,37 @@
+""" Test Pipeline Create App """
+import pytest
+
+from nf_core.pipelines.create import PipelineCreateApp
+
+
+@pytest.mark.asyncio
+async def test_app_bindings():
+    """Test that the app bindings work."""
+    app = PipelineCreateApp()
+    async with app.run_test() as pilot:
+        # Test pressing the D key
+        assert app.dark == True
+        await pilot.press("d")
+        assert app.dark == False
+        await pilot.press("d")
+        assert app.dark == True
+
+        # Test pressing the Q key
+        await pilot.press("q")
+        assert app.return_code == 0
+
+
+def test_welcome(snap_compare):
+    """Test snapshot for the first screen in the app. The welcome screen."""
+    assert snap_compare("../nf_core/pipelines/create/__init__.py")
+
+
+def test_choose_type(snap_compare):
+    """Test snapshot for the choose_type screen.
+    screen welcome > press start > screen choose_type
+    """
+
+    async def run_before(pilot) -> None:
+        await pilot.click("#start")
+
+    assert snap_compare("../nf_core/pipelines/create/__init__.py", terminal_size=(100, 50), run_before=run_before)