fix: handle return code (#219)

Author: sdn4z

src/twyn/cli.py

@@ -86,13 +86,15 @@ def run(
     if dependency_file and not any(dependency_file.endswith(key) for key in DEPENDENCY_FILE_MAPPING):
         raise click.UsageError("Dependency file name not supported.", ctx=click.get_current_context())
 
-    return int(
-        check_dependencies(
-            config_file=config,
-            dependency_file=dependency_file,
-            dependencies_cli=set(dependency) or None,
-            selector_method=selector_method,
-            verbosity=verbosity,
+    sys.exit(
+        int(
+            check_dependencies(
+                config_file=config,
+                dependency_file=dependency_file,
+                dependencies_cli=set(dependency) or None,
+                selector_method=selector_method,
+                verbosity=verbosity,
+            )
         )
     )
 

tests/main/test_cli.py

@@ -140,6 +140,22 @@ def test_click_arguments_default(self, mock_check_dependencies):
             )
         ]
 
+    @patch("twyn.cli.check_dependencies")
+    def test_return_code_1(self, mock_check_dependencies):
+        runner = CliRunner()
+        mock_check_dependencies.return_value = True
+
+        result = runner.invoke(cli.run)
+        assert result.exit_code == 1
+
+    @patch("twyn.cli.check_dependencies")
+    def test_return_code_0(self, mock_check_dependencies):
+        runner = CliRunner()
+        mock_check_dependencies.return_value = False
+
+        result = runner.invoke(cli.run)
+        assert result.exit_code == 0
+
     def test_only_one_verbosity_level_is_allowed(self):
         runner = CliRunner()
         result = runner.invoke(cli.run, ["-v", "-vv"], catch_exceptions=False)