571cccfcbc
Add an opaque OnceKey type and use it for all calls to Once in build/soong. A future patch will convert the arguments to Once* to OnceKey once users outside build/soong have been updated. Test: onceper_test.go Change-Id: Ifcb338e6e603e804e507203c9508d30ffb2df966
135 lines
3.5 KiB
Go
135 lines
3.5 KiB
Go
// Copyright 2019 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package android
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import (
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"testing"
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)
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func TestOncePer_Once(t *testing.T) {
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once := OncePer{}
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key := NewOnceKey("key")
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a := once.Once(key, func() interface{} { return "a" }).(string)
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b := once.Once(key, func() interface{} { return "b" }).(string)
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if a != "a" {
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t.Errorf(`first call to Once should return "a": %q`, a)
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}
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if b != "a" {
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t.Errorf(`second call to Once with the same key should return "a": %q`, b)
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}
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}
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func TestOncePer_Get(t *testing.T) {
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once := OncePer{}
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key := NewOnceKey("key")
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a := once.Once(key, func() interface{} { return "a" }).(string)
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b := once.Get(key).(string)
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if a != "a" {
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t.Errorf(`first call to Once should return "a": %q`, a)
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}
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if b != "a" {
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t.Errorf(`Get with the same key should return "a": %q`, b)
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}
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}
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func TestOncePer_Get_panic(t *testing.T) {
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once := OncePer{}
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key := NewOnceKey("key")
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defer func() {
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p := recover()
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if p == nil {
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t.Error("call to Get for unused key should panic")
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}
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}()
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once.Get(key)
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}
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func TestOncePer_OnceStringSlice(t *testing.T) {
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once := OncePer{}
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key := NewOnceKey("key")
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a := once.OnceStringSlice(key, func() []string { return []string{"a"} })
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b := once.OnceStringSlice(key, func() []string { return []string{"a"} })
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if a[0] != "a" {
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t.Errorf(`first call to OnceStringSlice should return ["a"]: %q`, a)
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}
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if b[0] != "a" {
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t.Errorf(`second call to OnceStringSlice with the same key should return ["a"]: %q`, b)
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}
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}
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func TestOncePer_Once2StringSlice(t *testing.T) {
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once := OncePer{}
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key := NewOnceKey("key")
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a, b := once.Once2StringSlice(key, func() ([]string, []string) { return []string{"a"}, []string{"b"} })
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c, d := once.Once2StringSlice(key, func() ([]string, []string) { return []string{"c"}, []string{"d"} })
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if a[0] != "a" || b[0] != "b" {
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t.Errorf(`first call to Once2StringSlice should return ["a"], ["b"]: %q, %q`, a, b)
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}
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if c[0] != "a" || d[0] != "b" {
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t.Errorf(`second call to Once2StringSlice with the same key should return ["a"], ["b"]: %q, %q`, c, d)
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}
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}
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func TestNewOnceKey(t *testing.T) {
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once := OncePer{}
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key1 := NewOnceKey("key")
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key2 := NewOnceKey("key")
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a := once.Once(key1, func() interface{} { return "a" }).(string)
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b := once.Once(key2, func() interface{} { return "b" }).(string)
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if a != "a" {
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t.Errorf(`first call to Once should return "a": %q`, a)
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}
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if b != "b" {
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t.Errorf(`second call to Once with the NewOnceKey from same string should return "b": %q`, b)
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}
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}
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func TestNewCustomOnceKey(t *testing.T) {
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type key struct {
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key string
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}
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once := OncePer{}
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key1 := NewCustomOnceKey(key{"key"})
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key2 := NewCustomOnceKey(key{"key"})
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a := once.Once(key1, func() interface{} { return "a" }).(string)
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b := once.Once(key2, func() interface{} { return "b" }).(string)
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if a != "a" {
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t.Errorf(`first call to Once should return "a": %q`, a)
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}
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if b != "a" {
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t.Errorf(`second call to Once with the NewCustomOnceKey from equal key should return "a": %q`, b)
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}
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}
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