test(rootkeys): add unit tests

Signed-off-by: Gyuho Lee <[email protected]>

rootkeys/fs_test.go

@@ -0,0 +1,73 @@
+package rootkeys
+
+import (
+	"testing"
+)
+
+func TestRootsFS(t *testing.T) {
+	// Test that we can list the embedded files
+	entries, err := RootsFS.ReadDir("keys")
+	if err != nil {
+		t.Fatalf("failed to read keys directory: %v", err)
+	}
+
+	// Verify we have exactly 2 files
+	if len(entries) != 2 {
+		t.Errorf("expected 2 files, got %d", len(entries))
+	}
+
+	// Expected files
+	expectedFiles := map[string]bool{
+		"gpud-root-1.pem": false,
+		"gpud-root-2.pem": false,
+	}
+
+	// Verify each file exists and can be read
+	for _, entry := range entries {
+		name := entry.Name()
+		if _, ok := expectedFiles[name]; !ok {
+			t.Errorf("unexpected file: %s", name)
+			continue
+		}
+		expectedFiles[name] = true
+
+		// Try to read the file
+		content, err := RootsFS.ReadFile("keys/" + name)
+		if err != nil {
+			t.Errorf("failed to read file %s: %v", name, err)
+			continue
+		}
+
+		// Verify the file is not empty
+		if len(content) == 0 {
+			t.Errorf("file %s is empty", name)
+		}
+	}
+
+	// Verify all expected files were found
+	for name, found := range expectedFiles {
+		if !found {
+			t.Errorf("expected file %s was not found", name)
+		}
+	}
+}
+
+func TestRootsFSErrors(t *testing.T) {
+	// Test reading non-existent directory
+	_, err := RootsFS.ReadDir("nonexistent")
+	if err == nil {
+		t.Error("expected error when reading non-existent directory")
+	}
+
+	// Test reading non-existent file
+	_, err = RootsFS.ReadFile("keys/nonexistent.pem")
+	if err == nil {
+		t.Error("expected error when reading non-existent file")
+	}
+
+	// Test reading a directory as a file
+	_, err = RootsFS.ReadFile("keys")
+	if err == nil {
+		t.Error("expected error when reading directory as file")
+	}
+}