fix: update test

Signed-off-by: Junjie Gao <junjiegao@microsoft.com>

plugin/plugin_test.go

@@ -30,7 +30,7 @@ func TestGetMetadata(t *testing.T) {
 	t.Run("plugin error is in invalid json format", func(t *testing.T) {
 		exitErr := errors.New("unknown error")
 		stderr := []byte("sad")
-		expectedErrMsg := "failed to execute the get-plugin-metadata command for plugin test-plugin: sad"
+		expectedErrMsg := "invalid character 's' looking for beginning of value"
 		plugin := CLIPlugin{name: "test-plugin"}
 		executor = testCommander{stdout: nil, stderr: stderr, err: exitErr}
 		_, err := plugin.GetMetadata(context.Background(), &proto.GetMetadataRequest{})
@@ -55,7 +55,7 @@ func TestGetMetadata(t *testing.T) {
 	t.Run("plugin cause system error", func(t *testing.T) {
 		exitErr := errors.New("system error")
 		stderr := []byte("")
-		expectedErrMsg := "failed to execute the get-plugin-metadata command for plugin test-plugin"
+		expectedErrMsg := "system error"
 		plugin := CLIPlugin{name: "test-plugin"}
 		executor = testCommander{stdout: nil, stderr: stderr, err: exitErr}
 		_, err := plugin.GetMetadata(context.Background(), &proto.GetMetadataRequest{})

plugin/proto/errors_test.go

@@ -22,7 +22,7 @@ import (
 
 func TestRequestError_Error(t *testing.T) {
 	err := RequestError{Code: ErrorCodeAccessDenied, Err: errors.New("an error")}
-	want := string(ErrorCodeAccessDenied) + ": an error"
+	want := "an error"
 	if got := err.Error(); got != want {
 		t.Errorf("RequestError.Error() = %v, want %v", got, want)
 	}

verifier/verifier_test.go

@@ -986,7 +986,7 @@ func assertPluginVerification(scheme signature.SigningScheme, t *testing.T) {
 		VerificationLevel:   verificationLevel,
 	}
 	outcome, err = v.Verify(context.Background(), mock.ImageDescriptor, pluginSigEnv, opts)
-	if err == nil || outcome.Error == nil || outcome.Error.Error() != "invalid plugin response" {
+	if err == nil || outcome.Error == nil || outcome.Error.Error() != "failed to verify with plugin plugin-name: invalid plugin response" {
 		t.Fatalf("verification should fail when the verification plugin returns unexpected response. error : %v", outcome.Error)
 	}