chore: add more tests (zeromicro#2129)

Author: kevwan

core/errorx/wrap_test.go

@@ -10,9 +10,15 @@ import (
 func TestWrap(t *testing.T) {
 	assert.Nil(t, Wrap(nil, "test"))
 	assert.Equal(t, "foo: bar", Wrap(errors.New("bar"), "foo").Error())
+
+	err := errors.New("foo")
+	assert.True(t, errors.Is(Wrap(err, "bar"), err))
 }
 
 func TestWrapf(t *testing.T) {
 	assert.Nil(t, Wrapf(nil, "%s", "test"))
 	assert.Equal(t, "foo bar: quz", Wrapf(errors.New("quz"), "foo %s", "bar").Error())
+
+	err := errors.New("foo")
+	assert.True(t, errors.Is(Wrapf(err, "foo %s", "bar"), err))
 }