package errorx import ( "errors" "testing" "github.com/stretchr/testify/assert" ) 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)) }