Replace mocked find_image tests with real ones

.github/workflows/test.yml

@@ -65,7 +65,7 @@ jobs:
           - unit
           - venv
           - contentproviders
-          - registry
+          - norun
           # Playwright test
           - ui
         include:

tests/norun/test_find.py

@@ -0,0 +1,23 @@
+import secrets
+from pathlib import Path
+
+from repo2docker.__main__ import make_r2d
+
+HERE = Path(__file__).parent
+
+
+def test_find_image():
+    image_name = f"{secrets.token_hex(8)}:latest"
+    r2d = make_r2d(["--image", image_name, "--no-run", str(HERE)])
+
+    r2d.start()
+
+    assert r2d.find_image()
+
+
+def test_dont_find_image():
+    image_name = f"{secrets.token_hex(8)}:latest"
+    r2d = make_r2d(["--image", image_name, "--no-run", str(HERE)])
+
+    # Just don't actually start the build, so image won't be found
+    assert not r2d.find_image()

tests/norun/test_registry.py

@@ -116,4 +116,4 @@ def test_registry(registry, dind):
     r2d.start()
 
     proc = subprocess.run(["docker", "manifest", "inspect", "--insecure", image_name])
-    assert proc.returncode == 0
+    assert proc.returncode == 0

tests/unit/test_app.py

@@ -10,35 +10,6 @@ from repo2docker.__main__ import make_r2d
 from repo2docker.app import Repo2Docker
 from repo2docker.utils import chdir
 
-
-def test_find_image():
-    images = [{"RepoTags": ["some-org/some-repo:latest"]}]
-
-    with patch("repo2docker.docker.docker.APIClient") as FakeDockerClient:
-        instance = FakeDockerClient.return_value
-        instance.images.return_value = images
-
-        r2d = Repo2Docker()
-        r2d.output_image_spec = "some-org/some-repo"
-        assert r2d.find_image()
-
-        instance.images.assert_called_with()
-
-
-def test_dont_find_image():
-    images = [{"RepoTags": ["some-org/some-image-name:latest"]}]
-
-    with patch("repo2docker.docker.docker.APIClient") as FakeDockerClient:
-        instance = FakeDockerClient.return_value
-        instance.images.return_value = images
-
-        r2d = Repo2Docker()
-        r2d.output_image_spec = "some-org/some-other-image-name"
-        assert not r2d.find_image()
-
-        instance.images.assert_called_with()
-
-
 def test_image_name_remains_unchanged():
     # if we specify an image name, it should remain unmodified
     with TemporaryDirectory() as src: