unquote CLI error

Signed-off-by: Alexandre Gaudreault <[email protected]>

test/e2e/fixture/app/actions.go

@@ -2,11 +2,13 @@ package app
 
 import (
 	"encoding/json"
+	goerrors "errors"
 	"fmt"
 	"os"
 	"slices"
 	"strconv"
 
+	argoexec "github.com/argoproj/pkg/exec"
 	log "github.com/sirupsen/logrus"
 	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 
@@ -38,6 +40,16 @@ func (a *Actions) DoNotIgnoreErrors() *Actions {
 	return a
 }
 
+func (a *Actions) getLastErrorMessage() string {
+	if cmdErr, ok := a.lastError.(*argoexec.CmdError); ok || goerrors.As(a.lastError, &cmdErr) {
+		if unquoted, err := strconv.Unquote(cmdErr.Stderr); err != nil {
+			return unquoted
+		}
+		return cmdErr.Stderr
+	}
+	return a.lastError.Error()
+}
+
 func (a *Actions) PatchFile(file string, jsonPath string) *Actions {
 	a.context.t.Helper()
 	fixture.Patch(a.context.path+"/"+file, jsonPath)

test/e2e/fixture/app/expectation.go

@@ -371,7 +371,7 @@ func Error(message, err string, matchers ...func(string, string) bool) Expectati
 		if !match(c.actions.lastOutput, message) {
 			return failed, fmt.Sprintf("output does not contain '%s'", message)
 		}
-		if !match(c.actions.lastError.Error(), err) {
+		if !match(c.actions.getLastErrorMessage(), err) {
 			return failed, fmt.Sprintf("error does not contain '%s'", err)
 		}
 		return succeeded, fmt.Sprintf("error '%s'", message)