more tests

Author: PeterIvanov

error_113.go

@@ -29,6 +29,7 @@ func (e *Error) IsOfType(t *Type) bool {
 	return false
 }
 
+// burrowForTyped returns either the first *Error in unwrap chain or nil
 func burrowForTyped(err error) *Error {
 	raw := err
 	for raw != nil {

error_113_test.go

@@ -117,4 +117,9 @@ func TestErrorsAndErrorx(t *testing.T) {
 		require.True(t, errors.Is(err, testType.NewWithNoMessage()))
 		require.True(t, IsOfType(err, testType))
 	})
+
+	t.Run("LayeredDecorateAgain", func(t *testing.T) {
+		err := fmt.Errorf("error test: %w", Decorate(io.EOF, "test"))
+		require.True(t, errors.Is(err, io.EOF))
+	})
 }