init: v1.0.0

gerrors/error_test.go

@@ -0,0 +1,46 @@
+package gerrors
+
+import (
+	"errors"
+	"fmt"
+	"testing"
+)
+
+var err0 = errors.New("err0")
+var err1 = errors.New("err1")
+
+func fn0() error {
+	return WithStack(WithAnnotating(err0, "comment0"))
+}
+
+func fn1() error {
+	if err := fn0(); err != nil {
+		e := ChainErrors(err1, err)
+		return WithStack(WithAnnotating(e, "comment1"))
+	}
+	return nil
+}
+
+func fn2() error {
+	if err := fn1(); err != nil {
+		return WithMessage(err, "err2")
+	}
+	return nil
+}
+
+func TestError(t *testing.T) {
+
+	e := WithAnnotating(err0, "comment0")
+	fmt.Printf("%+v\n", e)
+	fmt.Println()
+
+	if !Is(fn2(), err0) || !Is(fn2(), err1) {
+		t.Fail()
+	}
+	fmt.Println(fn2())
+	fmt.Println()
+	// output:
+	// err2, caused by err1(comment1), caused by err0(comment0)
+
+	fmt.Printf("%+v\n", fn2())
+}