From 8ca2be74c2e9722698c3a2d0a35454d94f1a6c11 Mon Sep 17 00:00:00 2001
From: Hedzr Yeh <hedzrz@gmail.com>
Date: Wed, 13 Dec 2023 11:22:09 +0800
Subject: [PATCH] fixed tests

---
 join_go1.11_test.go | 56 +++++++++++++++++++++++++++++++++++++++++++++
 join_go1.13_test.go | 14 ++++++++++++
 2 files changed, 70 insertions(+)
 create mode 100644 join_go1.11_test.go

diff --git a/join_go1.11_test.go b/join_go1.11_test.go
new file mode 100644
index 0000000..4bc514e
--- /dev/null
+++ b/join_go1.11_test.go
@@ -0,0 +1,56 @@
+// Copyright © 2023 Hedzr Yeh.
+
+//go:build go1.11
+// +build go1.11
+
+package errors_test
+
+import (
+	"errors"
+	"fmt"
+	"testing"
+
+	v3 "gopkg.in/hedzr/errors.v3"
+)
+
+func TestJoinErrorsStdFormatGo111(t *testing.T) {
+	err1 := errors.New("err1")
+	err2 := errors.New("err2")
+
+	err := v3.Join(err1, err2)
+
+	fmt.Printf("%T, %v\n", err, err)
+
+	if v3.Is(err, err1) {
+		t.Log("err is err1")
+	} else {
+		t.Fatal("FAILED: expecting err is err1")
+	}
+
+	if v3.Is(err, err2) {
+		t.Log("err is err2")
+	} else {
+		t.Fatal("FAILED: expecting err is err2")
+	}
+
+	err3 := fmt.Errorf("error3: %w", err)
+	fmt.Printf("%T, %v\n", err3, v3.Unwrap(err3))
+
+	if v3.Is(err3, err1) {
+		t.Log("err3 is err1")
+	} else {
+		t.Fatal("FAILED: expecting err3 is err1")
+	}
+
+	if v3.Is(err3, err2) {
+		t.Log("err3 is err2")
+	} else {
+		t.Fatal("FAILED: expecting err3 is err2")
+	}
+
+	if !v3.Is(err2, err3) {
+		t.Log("err2 isn't err3")
+	} else {
+		t.Fatal("FAILED: expecting err2 is err3")
+	}
+}
diff --git a/join_go1.13_test.go b/join_go1.13_test.go
index a0fbecb..1824285 100644
--- a/join_go1.13_test.go
+++ b/join_go1.13_test.go
@@ -8,6 +8,7 @@ package errors_test
 import (
 	"errors"
 	"fmt"
+	"io"
 	"testing"
 
 	v3 "gopkg.in/hedzr/errors.v3"
@@ -54,3 +55,16 @@ func TestJoinErrorsStdFormat(t *testing.T) {
 		t.Fatal("FAILED: expecting err2 is err3")
 	}
 }
+
+func TestCauses2_errors(t *testing.T) {
+	err := io.EOF
+
+	if !errors.Is(err, io.EOF) {
+		t.Fail()
+	}
+
+	err = dummy(t)
+	err = fmt.Errorf("wrapped: %w", err)
+	t.Logf("divide: %v", err)
+	t.Logf("Unwrap: %v", errors.Unwrap(err))
+}