fix test because format '%w' cannot work for go1.11

join_go1.13_test.go

@@ -0,0 +1,43 @@
+// Copyright © 2023 Hedzr Yeh.
+
+//go:build go1.13
+// +build go1.13
+
+package errors_test
+
+import (
+	"fmt"
+	"testing"
+
+	"gopkg.in/hedzr/errors.v3"
+)
+
+func TestJoinErrorsStdFormat(t *testing.T) {
+	err1 := errors.New("err1")
+	err2 := errors.New("err2")
+	err := errors.Join(err1, err2)
+	fmt.Printf("%T, %v\n", err, err)
+	if errors.Is(err, err1) {
+		t.Log("err is err1")
+	} else {
+		t.Fatal("expecting err is err1")
+	}
+	if errors.Is(err, err2) {
+		t.Log("err is err2")
+	} else {
+		t.Fatal("expecting err is err2")
+	}
+
+	err3 := fmt.Errorf("error3: %w", err)
+	fmt.Printf("%T, %v\n", err3, errors.Unwrap(err3))
+	if errors.Is(err3, err1) {
+		t.Log("err3 is err1")
+	} else {
+		t.Fatal("expecting err3 is err1")
+	}
+	if errors.Is(err3, err2) {
+		t.Log("err3 is err2")
+	} else {
+		t.Fatal("expecting err3 is err1")
+	}
+}

join_test.go

@@ -24,17 +24,4 @@ func TestJoinErrors(t *testing.T) {
 	} else {
 		t.Fatal("expecting err is err2")
 	}
-
-	err3 := fmt.Errorf("error3: %w", err)
-	fmt.Printf("%T, %v\n", err3, errors.Unwrap(err3))
-	if errors.Is(err3, err1) {
-		t.Log("err3 is err1")
-	} else {
-		t.Fatal("expecting err3 is err1")
-	}
-	if errors.Is(err3, err2) {
-		t.Log("err3 is err2")
-	} else {
-		t.Fatal("expecting err3 is err1")
-	}
 }