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-rw-r--r--src/errors/wrap_test.go13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/errors/wrap_test.go b/src/errors/wrap_test.go
index 590c1857e3..4a4a732c9b 100644
--- a/src/errors/wrap_test.go
+++ b/src/errors/wrap_test.go
@@ -238,6 +238,19 @@ func (errorUncomparable) Is(target error) bool {
return ok
}
+func ExampleIs() {
+ if _, err := os.Open("non-existing"); err != nil {
+ if errors.Is(err, os.ErrNotExist) {
+ fmt.Println("file does not exist")
+ } else {
+ fmt.Println(err)
+ }
+ }
+
+ // Output:
+ // file does not exist
+}
+
func ExampleAs() {
if _, err := os.Open("non-existing"); err != nil {
var pathError *os.PathError