Add Unwrap for compat with go1.13 errors

hashicorp · Jul 13, 2020 · 09e55f2 · 09e55f2
1 parent 8a6fb52
commit 09e55f2
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Showing 2 changed files with 14 additions and 0 deletions.
diff --git a/errwrap.go b/errwrap.go
@@ -167,3 +167,7 @@ func (w *wrappedError) Error() string {
 func (w *wrappedError) WrappedErrors() []error {
 	return []error{w.Outer, w.Inner}
 }
+
+func (w *wrappedError) Unwrap() error {
+	return w.Inner
+}
diff --git a/errwrap_test.go b/errwrap_test.go
@@ -1,6 +1,7 @@
 package errwrap
 
 import (
+	"errors"
 	"fmt"
 	"testing"
 )
@@ -92,3 +93,12 @@ func TestGetAllType(t *testing.T) {
 		}
 	}
 }
+
+func TestWrappedError_IsCompatibleWithErrorsUnwrap(t *testing.T) {
+	inner := errors.New("inner error")
+	err := Wrap(errors.New("outer"), inner)
+	actual := errors.Unwrap(err)
+	if actual != inner {
+		t.Fatal("wrappedError did not unwrap to inner")
+	}
+}