Go language-Test Cases

Writing Unit Test Cases

• File name must end With ' _test.go '
• Must import "testing" this package
• The tests are executed in the order in which they were written in the source code.
• Test the function ' testxxx (t *testing. T) ' parameter is ' testing. T ', we can use this type to log errors or test status
• Test format: ' Func testxxx (t *testing. T) ', ' Xxx ' section can be any combination of alphanumeric, but the first letter cannot be a lowercase letter [a-z]
• function, by calling ' testing. T ' Error ', ' Errorf ', ' failnow ', ' Fatal ', ' fatalif ' method, indicating that the test case does not pass, call ' log ' method to record the information of the test

Write stress tests

• The stress test case must follow the following format, where xxx can be a combination of any alphanumeric, but the first letter cannot be a lowercase letter
  Func benchmarkxxx (b *testing.a) {...}
• Go test does not perform the function of the stress test by default, and takes parameters if you want to perform a stress test. -test.bench, Syntax:-test.bench= "Test_name_regex", such as Go test-test.bench= ". *" means testing all the stress test functions
• In stress test cases, it is necessary to use testing in the circulation body. B.N to enable test cases to run properly
• The file name must also end with _test.go

Unit Test Cases

Source

    package gotest    import(    )    func Add(a, b float64) float64 {        return a +  b    }

Test Cases

package gotestimport (    "testing")func Test_Add_1(t *testing.T) {    if i := Add(6,2); i != 8 {        t.Error("fail")    } else {        t.Log("pass")    }}func Test_Add_2(t *testing.T) {    if i := Add(6,2); i == 8 {        t.Log("pass")    } else {        t.Error("fail")    }}

Run test Cases

    go test -v

Test Case Execution Results

=== RUN   Test_Add_1--- PASS: Test_Add_1 (0.00s)    gotest_test.go:11: pass=== RUN   Test_Add_2--- PASS: Test_Add_2 (0.00s)    gotest_test.go:17: passPASSok      github.com/shadowsocks/shadowsocks-go/sample-config/gotest  0.001s

Stress test Cases

Source

package gotestimport(    "testing")func Benchmark_Add(b *testing.B) {    for i := 0; i < b.N ; i++ {        Add(3,4)    }}func Benchmark_TimeConsumingFunction(b *testing.B) {    b.StopTimer() //调用该函数停止压力测试的时间计数    //做一些初始化工作，这些时间不影响我们测试函数本身的性能    b.StartTimer()    for i := 0; i < b.N; i++ {        Add(5,6)    }}

Run results

Benchmark_Add-4                         2000000000           0.38 ns/opBenchmark_TimeConsumingFunction-4       2000000000           0.38 ns/opPASSok      github.com/shadowsocks/shadowsocks-go/sample-config/gotest  1.594s第一条显示Benchmark_add-4执行了20亿次，每次执行时间为0.38纳秒第二条也一样