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// Copyright 2025 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package micro
import (
"errors"
"testing"
)
func TestNATSErrorUnwrap(t *testing.T) {
baseErr := errors.New("base error")
natsErr := &NATSError{
Subject: "test.subject",
Description: "test description",
err: baseErr,
}
unwrapped := errors.Unwrap(natsErr)
if unwrapped != baseErr {
t.Errorf("Unwrap() = %v, want %v", unwrapped, baseErr)
}
// Test with nil underlying error
natsErr2 := &NATSError{
Subject: "test.subject",
Description: "test description",
}
if errors.Unwrap(natsErr2) != nil {
t.Errorf("Unwrap() with nil err should return nil")
}
}
func TestNATSErrorIs(t *testing.T) {
natsErr1 := &NATSError{
Subject: "test.subject",
Description: "test description",
}
natsErr2 := &NATSError{
Subject: "test.subject",
Description: "test description",
}
natsErr3 := &NATSError{
Subject: "different.subject",
Description: "test description",
}
natsErr4 := &NATSError{
Subject: "test.subject",
Description: "different description",
}
// Test equality
if !errors.Is(natsErr1, natsErr2) {
t.Errorf("Is() = false, want true for equal errors")
}
// different subject
if errors.Is(natsErr1, natsErr3) {
t.Errorf("Is() = true, want false for different subjects")
}
// different description
if errors.Is(natsErr1, natsErr4) {
t.Errorf("Is() = true, want false for different descriptions")
}
// non NATSError
otherErr := errors.New("other error")
if errors.Is(natsErr1, otherErr) {
t.Errorf("Is() = true, want false for non-NATSError")
}
}
func TestNATSErrorWrapping(t *testing.T) {
// Test error chain
baseErr := errors.New("connection failed")
natsErr := &NATSError{
Subject: "test.subject",
Description: "service error: connection failed",
err: baseErr,
}
// Check that we can find the base error in the chain
if !errors.Is(natsErr, baseErr) {
t.Errorf("errors.Is() should find base error in chain")
}
// Test error message
expectedMsg := `"test.subject": service error: connection failed`
if natsErr.Error() != expectedMsg {
t.Errorf("Error() = %q, want %q", natsErr.Error(), expectedMsg)
}
}
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