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Use errors.Is for error comparison instead of direct equality checks #502

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Use errors.Is for error comparison instead of direct equality checks #502

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3 changes: 2 additions & 1 deletion components/metrics/http.go
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
package metrics

import (
"errors"
"net/http"

"github.com/go-chi/chi/v5"
Expand Down Expand Up @@ -31,7 +32,7 @@ func ServeHTTP(addr string, registry *prometheus.Registry) (cancel func()) {

go func() {
err := server.ListenAndServe()
if err != http.ErrServerClosed {
if !errors.Is(err, http.ErrServerClosed) {
panic(err)
}
}()
Expand Down
3 changes: 2 additions & 1 deletion log.go
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
package watermill

import (
"errors"
"fmt"
"io"
"log"
Expand Down Expand Up @@ -216,7 +217,7 @@ func (c *CaptureLoggerAdapter) HasError(err error) bool {
defer c.lock.Unlock()

for _, capturedMsg := range c.captured[ErrorLogLevel] {
if capturedMsg.Err == err {
if errors.Is(err, capturedMsg.Err) {
return true
}
}
Expand Down
19 changes: 9 additions & 10 deletions message/router/middleware/poison_test.go
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Expand Up @@ -2,21 +2,20 @@ package middleware_test

import (
"context"
stdErrors "errors"
"testing"
"time"

"github.com/ThreeDotsLabs/watermill"
"github.com/ThreeDotsLabs/watermill/message/subscriber"
"github.com/ThreeDotsLabs/watermill/pubsub/gochannel"

"github.com/hashicorp/go-multierror"

"github.com/ThreeDotsLabs/watermill/message"

"github.com/ThreeDotsLabs/watermill/message/router/middleware"
"github.com/pkg/errors"
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I dont see a need for this deprecated one

Remove it, so you can use errors directly without an alias

The call to errors.Wrap can be replaced by fmt.Errorf("%w ...")

errors.New can be used directly from stdlib

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It looks like errors.Cause is being used in the current implementation, which makes it a bit more challenging to simply remove the alias.

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From what I had seen before raising my point, errors.Cause is used only in the code, not in the test file I quoted.

But, I have missed something. And I was wrong

There is this indeed.

assert.Equal(t, errFailed, errors.Cause(multierr.WrappedErrors()[1]))

this could be rewritten to use maybe

assert.ErrorIs(t, multierr, errFailed)

"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"

"github.com/ThreeDotsLabs/watermill"
"github.com/ThreeDotsLabs/watermill/message"
"github.com/ThreeDotsLabs/watermill/message/router/middleware"
"github.com/ThreeDotsLabs/watermill/message/subscriber"
"github.com/ThreeDotsLabs/watermill/pubsub/gochannel"
)

const topic = "testing_poison_queue_topic"
Expand Down Expand Up @@ -213,7 +212,7 @@ func TestPoisonQueueWithFilter_poison_queue(t *testing.T) {
msg := message.NewMessage("uuid", []byte("payload"))

poisonQueue, err := middleware.PoisonQueueWithFilter(&poisonPublisher, topic, func(err error) bool {
return err == poisonQueueErr
return stdErrors.Is(err, poisonQueueErr)
})
require.NoError(t, err)

Expand All @@ -232,7 +231,7 @@ func TestPoisonQueueWithFilter_non_poison_queue(t *testing.T) {
msg := message.NewMessage("uuid", []byte("payload"))

poisonQueue, err := middleware.PoisonQueueWithFilter(&poisonPublisher, topic, func(err error) bool {
return err != nonPoisonQueueErr
return !stdErrors.Is(err, nonPoisonQueueErr)
})
require.NoError(t, err)

Expand Down