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Merge pull request #72 from ashishranjan738/tracetest
Adds UT for trace package in utils
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/* | ||
Copyright 2019 The Kubernetes Authors. | ||
Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
*/ | ||
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package trace | ||
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import ( | ||
"bytes" | ||
"strings" | ||
"testing" | ||
"time" | ||
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"k8s.io/klog" | ||
) | ||
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func TestStep(t *testing.T) { | ||
tests := []struct { | ||
name string | ||
inputString string | ||
expectedTrace *Trace | ||
}{ | ||
{ | ||
name: "When string is empty", | ||
inputString: "", | ||
expectedTrace: &Trace{ | ||
steps: []traceStep{ | ||
{time.Now(), ""}, | ||
}, | ||
}, | ||
}, | ||
{ | ||
name: "When string is not empty", | ||
inputString: "test2", | ||
expectedTrace: &Trace{ | ||
steps: []traceStep{ | ||
{time.Now(), "test2"}, | ||
}, | ||
}, | ||
}, | ||
} | ||
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for _, tt := range tests { | ||
t.Run(tt.name, func(t *testing.T) { | ||
sampleTrace := &Trace{} | ||
sampleTrace.Step(tt.inputString) | ||
if sampleTrace.steps[0].msg != tt.expectedTrace.steps[0].msg { | ||
t.Errorf("Expected %v \n Got %v \n", tt.expectedTrace, sampleTrace) | ||
} | ||
}) | ||
} | ||
} | ||
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func TestTotalTime(t *testing.T) { | ||
test := struct { | ||
name string | ||
inputTrace *Trace | ||
}{ | ||
name: "Test with current system time", | ||
inputTrace: &Trace{ | ||
startTime: time.Now(), | ||
}, | ||
} | ||
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t.Run(test.name, func(t *testing.T) { | ||
got := test.inputTrace.TotalTime() | ||
if got == 0 { | ||
t.Errorf("Expected total time 0, got %d \n", got) | ||
} | ||
}) | ||
} | ||
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func TestLog(t *testing.T) { | ||
test := struct { | ||
name string | ||
expectedMessages []string | ||
sampleTrace *Trace | ||
}{ | ||
name: "Check the log dump with 3 msg", | ||
expectedMessages: []string{ | ||
"msg1", "msg2", "msg3", | ||
}, | ||
sampleTrace: &Trace{ | ||
name: "Sample Trace", | ||
steps: []traceStep{ | ||
{time.Now(), "msg1"}, | ||
{time.Now(), "msg2"}, | ||
{time.Now(), "msg3"}, | ||
}, | ||
}, | ||
} | ||
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t.Run(test.name, func(t *testing.T) { | ||
var buf bytes.Buffer | ||
klog.SetOutput(&buf) | ||
test.sampleTrace.Log() | ||
for _, msg := range test.expectedMessages { | ||
if !strings.Contains(buf.String(), msg) { | ||
t.Errorf("\nMsg %q not found in log: \n%v\n", msg, buf.String()) | ||
} | ||
} | ||
}) | ||
} | ||
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func TestLogIfLong(t *testing.T) { | ||
currentTime := time.Now() | ||
type mutate struct { | ||
delay time.Duration | ||
msg string | ||
} | ||
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tests := []*struct { | ||
name string | ||
expectedMessages []string | ||
sampleTrace *Trace | ||
threshold time.Duration | ||
mutateInfo []mutate // mutateInfo contains the information to mutate step's time to simulate multiple tests without waiting. | ||
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}{ | ||
{ | ||
name: "When threshold is 500 and msg 2 has highest share", | ||
expectedMessages: []string{ | ||
"msg2", | ||
}, | ||
mutateInfo: []mutate{ | ||
{10, "msg1"}, | ||
{1000, "msg2"}, | ||
{0, "msg3"}, | ||
}, | ||
threshold: 500, | ||
}, | ||
{ | ||
name: "When threshold is 10 and msg 3 has highest share", | ||
expectedMessages: []string{ | ||
"msg3", | ||
}, | ||
mutateInfo: []mutate{ | ||
{0, "msg1"}, | ||
{0, "msg2"}, | ||
{50, "msg3"}, | ||
}, | ||
threshold: 10, | ||
}, | ||
{ | ||
name: "When threshold is 0 and all msg have same share", | ||
expectedMessages: []string{ | ||
"msg1", "msg2", "msg3", | ||
}, | ||
mutateInfo: []mutate{ | ||
{0, "msg1"}, | ||
{0, "msg2"}, | ||
{0, "msg3"}, | ||
}, | ||
threshold: 0, | ||
}, | ||
{ | ||
name: "When threshold is 20 and all msg 1 has highest share", | ||
expectedMessages: []string{}, | ||
mutateInfo: []mutate{ | ||
{10, "msg1"}, | ||
{0, "msg2"}, | ||
{0, "msg3"}, | ||
}, | ||
threshold: 20, | ||
}, | ||
} | ||
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for _, tt := range tests { | ||
t.Run(tt.name, func(t *testing.T) { | ||
var buf bytes.Buffer | ||
klog.SetOutput(&buf) | ||
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tt.sampleTrace = New("Test trace") | ||
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for index, mod := range tt.mutateInfo { | ||
tt.sampleTrace.Step(mod.msg) | ||
tt.sampleTrace.steps[index].stepTime = currentTime.Add(mod.delay) | ||
} | ||
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tt.sampleTrace.LogIfLong(tt.threshold) | ||
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for _, msg := range tt.expectedMessages { | ||
if msg != "" && !strings.Contains(buf.String(), msg) { | ||
t.Errorf("Msg %q expected in trace log: \n%v\n", msg, buf.String()) | ||
} | ||
} | ||
}) | ||
} | ||
} |