英文:
Mock a go-logr and verify the message it logs?
问题
我正在使用go-logr/logr库。我有一个测试需要将logger作为参数传递，并检查它是否能够记录发送的数据。
我需要测试GetConfig函数：
config, err := GetConfig(FilePath, "ns", logger, "test")
最后，我需要在测试中打印来自logger的一些消息：
Expect(logger.msg).To(Equal("test"))
我的问题是如何进行模拟？
我尝试了以下方法，但没有成功：
func NewTestLogger() logr.Logger {l := &testlogger{Formatter: funcr.NewFormatter(funcr.Options{}),}return logr.New(l)}var _ = Describe("test action", func() {It("action configuration with logger", func() {tl := NewTestLogger()config, err := GetConfig(kcfgFilePath, "ns", tl, "test")
但我无法打印logger的值，我应该如何正确地做呢？
类似于：
assert.Contains(t, tl.sink.Output, "test")
我应该使用testing包吗？
更新
这是一个没有断言的可工作版本。不确定我错过了什么，因为我想断言来自GetConfig的输出中的数据'tl'的键和值。
这是我在生产环境中的代码，我该如何使其工作？
https://go.dev/play/p/XDDkNjkESUw
我的问题是如何断言以下内容
assert.Contains(t, tl.GetSink().WithName("Output"), "test")assert.Contains(t, tl.GetSink().WithName("Output"), "message")assert.Contains(t, tl.GetSink().WithName("Output"), "print something")
我能够获取数据，但不确定如何断言值。
英文:
Im using the following go-logr/logr library.
I have a test which needs to pass the logger as parameter and check that it was able to log the data that was sent.
I need to test the function GetConfig:
config, err := GetConfig(FilePath, "ns", logger, "test" )
At the end I need to print some message from the logger in the test
Expect(logger.msg).To(Equal("test"))
My question is how should mock it?
I’ve tried with the following but without success
func NewTestLogger() logr.Logger {l := &testlogger{Formatter: funcr.NewFormatter(funcr.Options{}),}return logr.New(l)}var _ = Describe(“test” action, func() {It("action configuration with logger", func() {//var t *testing.Ttl := NewTestLogger()config, err := GetConfig(kcfgFilePath, "ns", tl, "test")
But Im not able to print the value from the logger, how can I do it right?
Something like
assert.Contains(t, tl.sink.Output, "test")
Should I use the testing package?
update
This is a working version without the assertion.
Not sure what I miss there as I want to assert the data that are coming from the output of the GetConfig 'tl` and get the key and value
This is close to the code I've in prod, how can I make work?
https://go.dev/play/p/XDDkNjkESUw
My Question is how should I assert the following
assert.Contains(t, tl.GetSink().WithName("Output"), "test")assert.Contains(t, tl.GetSink().WithName("Output"), "message")assert.Contains(t, tl.GetSink().WithName("Output"), "print something")
I was able to get the data like following, but not sure how to assert the values
答案1
得分: 2
logr.New函数接受任何实现LogSink接口的对象 - 这意味着你只需要实现一个将调用保存到内存中的切片的对象，而不是打印输出，然后你可以期望该切片包含你的日志输出。
package mainimport ("testing""github.com/stretchr/testify/assert"// ... 一些额外的导入)type TestLogger struct {Output map[string]map[int][]interface{}r RuntimeInfo}func (t *TestLogger) doLog(level int, msg string, keysAndValues ...interface{}) {m := make(map[int][]interface{}, len(keysAndValues))m[level] = keysAndValuest.output[msg] = m}func (t *TestLogger) Init(info RuntimeInfo) { t.r = info}func (t *TestLogger) Enabled(level int) bool {return true}func (t *TestLogger) Info(level int, msg string, keysAndValues ...interface{}) { t.doLog(level, msg, keysAndValues...) }func (t *TestLogger) Error(err error, msg string, keysAndValues ...interface{}) { t.doLog(level, msg, append(keysAndValues, err)...) }func (t *TestLogger) WithValues(keysAndValues ...interface{}) LogSink { return t}func (t *TestLogger) WithName(name string) LogSink { return t }func TestLoggerHasOutput(t *testing.T) {l := &TestLogger{make(map[string]map[int][]interface[]), RuntimeInfo{1}}tl := logr.New(l)config, err := GetConfig(kcfgFilePath, "ns", tl, "test")assert.Contains(t, l.Output, "ns") // 你也可以测试输出的内容}
英文:
The logr.New function accepts any implementation of the LogSink interface - This means you should just implement one that saves the calls onto a slice in-memory instead of printing, and then you can expect that the slice has your log output.
package mainimport ("testing""github.com/stretchr/testify/assert"// ... some extra imports)type TestLogger struct {Output map[string]map[int][]interface{}r RuntimeInfo}func (t *TestLogger) doLog(level int, msg string, keysAndValues ...interface{}) {m := make(map[int][]interface{}, len(keysAndValues))m[level] = keysAndValuest.output[msg] = m}func (t *TestLogger) Init(info RuntimeInfo) { t.r = info}func (t *TestLogger) Enabled(level int) bool {return true}func (t *TestLogger) Info(level int, msg string, keysAndValues ...interface{}) { t.doLog(level, msg, keysAndValues...) }func (t *TestLogger) Error(err error, msg string, keysAndValues ...interface{}) { t.doLog(level, msg, append(keysAndValues, err)...) }func (t *TestLogger) WithValues(keysAndValues ...interface{}) LogSink { return t}func (t *TestLogger) WithName(name string) LogSink { return t }func TestLoggerHasOutput(t *testing.T) {l := &TestLogger{make(map[string]map[int][]interface[]), RuntimeInfo{1}}tl := logr.New(l)config, err := GetConfig(kcfgFilePath, "ns", tl, "test")assert.Contains(t, l.Output, "ns") // you can also test the contents of the output as well}
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