test: add test for creating customer firebase error

firebase/error_test.go

@@ -0,0 +1,44 @@
+package firebase
+
+import (
+	"errors"
+	"fmt"
+	"testing"
+)
+
+func TestNewError(t *testing.T) {
+	type args struct {
+		err error
+	}
+	tests := []struct {
+		name string
+		args args
+		want FirebaseError
+	}{
+		{
+			"Test Error 1",
+			args{
+				err: fmt.Errorf("ERROR"),
+			},
+			FirebaseError{
+				FirebaseError: fmt.Errorf("ERROR"),
+			},
+		},
+		{
+			"Test Error 2",
+			args{
+				err: errors.New("ERROR"),
+			},
+			FirebaseError{
+				FirebaseError: errors.New("ERROR"),
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := NewError(tt.args.err); got.Error() != tt.want.Error() {
+				t.Errorf("NewError() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}