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tailscale/util/mak/mak_test.go

72 lines
1.3 KiB
Go

// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package mak contains code to help make things.
package mak
import (
"reflect"
"testing"
)
type M map[string]int
func TestSet(t *testing.T) {
t.Run("unnamed", func(t *testing.T) {
var m map[string]int
Set(&m, "foo", 42)
Set(&m, "bar", 1)
Set(&m, "bar", 2)
want := map[string]int{
"foo": 42,
"bar": 2,
}
if got := m; !reflect.DeepEqual(got, want) {
t.Errorf("got %v; want %v", got, want)
}
})
t.Run("named", func(t *testing.T) {
var m M
Set(&m, "foo", 1)
Set(&m, "bar", 1)
Set(&m, "bar", 2)
want := M{
"foo": 1,
"bar": 2,
}
if got := m; !reflect.DeepEqual(got, want) {
t.Errorf("got %v; want %v", got, want)
}
})
}
func TestNonNil(t *testing.T) {
var s []string
NonNil(&s)
if len(s) != 0 {
t.Errorf("slice len = %d; want 0", len(s))
}
if s == nil {
t.Error("slice still nil")
}
s = append(s, "foo")
NonNil(&s)
if len(s) != 1 {
t.Errorf("len = %d; want 1", len(s))
}
if s[0] != "foo" {
t.Errorf("value = %q; want foo", s)
}
var m map[string]string
NonNil(&m)
if len(m) != 0 {
t.Errorf("map len = %d; want 0", len(s))
}
if m == nil {
t.Error("map still nil")
}
}