test: add tests for sketch library operations when sketch folder is missing

Author: dido18

internal/orchestrator/sketch_libs_test.go

@@ -0,0 +1,88 @@
+// This file is part of arduino-app-cli.
+//
+// Copyright 2025 ARDUINO SA (http://www.arduino.cc/)
+//
+// This software is released under the GNU General Public License version 3,
+// which covers the main part of arduino-app-cli.
+// The terms of this license can be found at:
+// https://www.gnu.org/licenses/gpl-3.0.en.html
+//
+// You can be released from the requirements of the above licenses by purchasing
+// a commercial license. Buying such a license is mandatory if you want to
+// modify or otherwise use the software for commercial activities involving the
+// Arduino software without disclosing the source code of your own applications.
+// To purchase a commercial license, send an email to license@arduino.cc.
+
+package orchestrator
+
+import (
+	"context"
+	"testing"
+
+	"github.com/arduino/go-paths-helper"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/arduino/arduino-app-cli/internal/orchestrator/app"
+)
+
+func TestListSketchLibraries(t *testing.T) {
+	t.Run("fail to list libraries if the sketch folder is missing", func(t *testing.T) {
+		pythonApp, err := app.Load(createTestAppPythonOnly(t))
+		require.NoError(t, err)
+
+		libs, err := ListSketchLibraries(context.Background(), pythonApp)
+		require.Error(t, err)
+		assert.Contains(t, err.Error(), "cannot list libraries. Missing sketch folder")
+		assert.Empty(t, libs)
+	})
+
+	t.Run("fail to add library if the sketch folder is missing", func(t *testing.T) {
+		pythonApp, err := app.Load(createTestAppPythonOnly(t))
+		require.NoError(t, err)
+
+		libs, err := AddSketchLibrary(context.Background(), pythonApp, LibraryReleaseID{}, false)
+		require.Error(t, err)
+		assert.Contains(t, err.Error(), "cannot add a library. Missing sketch folder")
+		assert.Empty(t, libs)
+	})
+
+	t.Run("fail to remove library if the sketch folder is missing", func(t *testing.T) {
+		pythonApp, err := app.Load(createTestAppPythonOnly(t))
+		require.NoError(t, err)
+
+		id, err := RemoveSketchLibrary(context.Background(), pythonApp, LibraryReleaseID{})
+		require.Error(t, err)
+		assert.Contains(t, err.Error(), "cannot remove a library. Missing sketch folder")
+		assert.Empty(t, id)
+	})
+}
+
+// Helper function to create a test app without sketch path (Python-only)
+func createTestAppPythonOnly(t *testing.T) *paths.Path {
+	tempDir := t.TempDir()
+
+	appYaml := paths.New(tempDir, "app.yaml")
+	require.NoError(t, appYaml.WriteFile([]byte(`
+name: test-python-app
+version: 1.0.0
+description: Test Python-only app
+`)))
+
+	// Create python directory and file
+	pythonDir := paths.New(tempDir, "python")
+	require.NoError(t, pythonDir.MkdirAll())
+
+	pythonFile := pythonDir.Join("main.py")
+	require.NoError(t, pythonFile.WriteFile([]byte(`
+import time
+
+def main():
+    print("Hello from Python!")
+    time.sleep(1)
+
+if __name__ == "__main__":
+    main()
+`)))
+	return paths.New(tempDir)
+}