tests: validate comparing errors of different packages

Signed-off-by: Niels de Vos <[email protected]>

internal/errors_test.go

@@ -0,0 +1,33 @@
+package internal
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/ceph/go-ceph/cephfs"
+	"github.com/ceph/go-ceph/rados"
+	"github.com/ceph/go-ceph/rbd"
+)
+
+func TestErrorCompare(t *testing.T) {
+	t.Run("ErrNotConnected", func(t *testing.T) {
+		err := rados.ErrNotConnected
+		assert.True(t, errors.Is(err, cephfs.ErrNotConnected))
+		assert.False(t, errors.Is(err, cephfs.ErrNotExist))
+	})
+
+	t.Run("ErrNotExist", func(t *testing.T) {
+		err := rbd.ErrNotExist
+		assert.True(t, errors.Is(err, rbd.ErrNotFound))
+		assert.True(t, errors.Is(err, cephfs.ErrNotExist))
+		assert.False(t, errors.Is(err, cephfs.ErrNotConnected))
+	})
+
+	t.Run("ErrNotFound", func(t *testing.T) {
+		err := rbd.ErrNotFound
+		assert.True(t, errors.Is(rbd.ErrNotFound, rados.ErrNotFound))
+		assert.False(t, errors.Is(err, rados.ErrNotConnected))
+	})
+}