Build error formatting on fission spec apply --wait (#1403)

The character `\n` in buildlog stores in package status
are escaped and so when we have to replace them with
actual line breaker.

pkg/fission-cli/cmd/package/util/util_test.go

@@ -0,0 +1,34 @@
+package util
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	fv1 "github.com/fission/fission/pkg/apis/fission.io/v1"
+)
+
+func TestPrintPackageSummary(t *testing.T) {
+
+	pkg := &fv1.Package{
+		Metadata: metav1.ObjectMeta{
+			Name:      "foobar",
+			Namespace: "dummy",
+		},
+		Status: fv1.PackageStatus{
+			BuildStatus: "failed",
+			BuildLog:    "dummy-build-log",
+		},
+	}
+
+	expected := `Name:        foobar\nEnvironment: \nStatus:      failed\nBuild Logs:\ndummy-build-log`
+	writer := &bytes.Buffer{}
+	PrintPackageSummary(writer, pkg)
+
+	gotWriter := strings.ReplaceAll(writer.String(), "\n", `\n`)
+	if gotWriter != expected {
+		t.Errorf("PrintPackageBuildLog() = %v, want %v", gotWriter, expected)
+	}
+}