go-multierror/sort_test.go at main · hashicorp/go-multierror · GitHub

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// Copyright IBM Corp. 2014, 2025
// SPDX-License-Identifier: MPL-2.0

package multierror

import (
	"errors"
	"reflect"
	"sort"
	"testing"
)

func TestSortSingle(t *testing.T) {
	errFoo := errors.New("foo")

	expected := []error{
		errFoo,
	}

	err := &Error{
		Errors: []error{
			errFoo,
		},
	}

	sort.Sort(err)
	if !reflect.DeepEqual(err.Errors, expected) {
		t.Fatalf("bad: %#v", err)
	}
}

func TestSortMultiple(t *testing.T) {
	errBar := errors.New("bar")
	errBaz := errors.New("baz")
	errFoo := errors.New("foo")

	expected := []error{
		errBar,
		errBaz,
		errFoo,
	}

	err := &Error{
		Errors: []error{
			errFoo,
			errBar,
			errBaz,
		},
	}

	sort.Sort(err)
	if !reflect.DeepEqual(err.Errors, expected) {
		t.Fatalf("bad: %#v", err)
	}
}

func TestLenNil(t *testing.T) {
	var err *Error
	if err.Len() != 0 {
		t.Fatalf("expected Len() to return 0 for nil *Error, got %d", err.Len())
	}
}