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| // Copyright 2013 The Go 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 testing_test
|
| import (
| "bytes"
| "runtime"
| "sync/atomic"
| "testing"
| "text/template"
| )
|
| var roundDownTests = []struct {
| v, expected int
| }{
| {1, 1},
| {9, 1},
| {10, 10},
| {11, 10},
| {100, 100},
| {101, 100},
| {999, 100},
| {1000, 1000},
| {1001, 1000},
| }
|
| func TestRoundDown10(t *testing.T) {
| for _, tt := range roundDownTests {
| actual := testing.RoundDown10(tt.v)
| if tt.expected != actual {
| t.Errorf("roundDown10(%d): expected %d, actual %d", tt.v, tt.expected, actual)
| }
| }
| }
|
| var roundUpTests = []struct {
| v, expected int
| }{
| {0, 1},
| {1, 1},
| {2, 2},
| {3, 3},
| {5, 5},
| {9, 10},
| {999, 1000},
| {1000, 1000},
| {1400, 2000},
| {1700, 2000},
| {2700, 3000},
| {4999, 5000},
| {5000, 5000},
| {5001, 10000},
| }
|
| func TestRoundUp(t *testing.T) {
| for _, tt := range roundUpTests {
| actual := testing.RoundUp(tt.v)
| if tt.expected != actual {
| t.Errorf("roundUp(%d): expected %d, actual %d", tt.v, tt.expected, actual)
| }
| }
| }
|
| func TestRunParallel(t *testing.T) {
| testing.Benchmark(func(b *testing.B) {
| procs := uint32(0)
| iters := uint64(0)
| b.SetParallelism(3)
| b.RunParallel(func(pb *testing.PB) {
| atomic.AddUint32(&procs, 1)
| for pb.Next() {
| atomic.AddUint64(&iters, 1)
| }
| })
| if want := uint32(3 * runtime.GOMAXPROCS(0)); procs != want {
| t.Errorf("got %v procs, want %v", procs, want)
| }
| if iters != uint64(b.N) {
| t.Errorf("got %v iters, want %v", iters, b.N)
| }
| })
| }
|
| func TestRunParallelFail(t *testing.T) {
| testing.Benchmark(func(b *testing.B) {
| b.RunParallel(func(pb *testing.PB) {
| // The function must be able to log/abort
| // w/o crashing/deadlocking the whole benchmark.
| b.Log("log")
| b.Error("error")
| })
| })
| }
|
| func ExampleB_RunParallel() {
| // Parallel benchmark for text/template.Template.Execute on a single object.
| testing.Benchmark(func(b *testing.B) {
| templ := template.Must(template.New("test").Parse("Hello, {{.}}!"))
| // RunParallel will create GOMAXPROCS goroutines
| // and distribute work among them.
| b.RunParallel(func(pb *testing.PB) {
| // Each goroutine has its own bytes.Buffer.
| var buf bytes.Buffer
| for pb.Next() {
| // The loop body is executed b.N times total across all goroutines.
| buf.Reset()
| templ.Execute(&buf, "World")
| }
| })
| })
| }
|
|
