mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-28 21:49:33 +00:00
772 lines
18 KiB
Go
772 lines
18 KiB
Go
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package testing
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import (
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"bytes"
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"fmt"
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"regexp"
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"runtime"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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)
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func init() {
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// Make benchmark tests run 10* faster.
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benchTime.d = 100 * time.Millisecond
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}
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func TestTestContext(t *T) {
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const (
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add1 = 0
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done = 1
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)
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// After each of the calls are applied to the context, the
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type call struct {
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typ int // run or done
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// result from applying the call
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running int
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waiting int
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started bool
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}
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testCases := []struct {
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max int
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run []call
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}{{
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max: 1,
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run: []call{
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{typ: add1, running: 1, waiting: 0, started: true},
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{typ: done, running: 0, waiting: 0, started: false},
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},
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}, {
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max: 1,
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run: []call{
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{typ: add1, running: 1, waiting: 0, started: true},
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{typ: add1, running: 1, waiting: 1, started: false},
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{typ: done, running: 1, waiting: 0, started: true},
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{typ: done, running: 0, waiting: 0, started: false},
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{typ: add1, running: 1, waiting: 0, started: true},
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},
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}, {
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max: 3,
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run: []call{
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{typ: add1, running: 1, waiting: 0, started: true},
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{typ: add1, running: 2, waiting: 0, started: true},
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{typ: add1, running: 3, waiting: 0, started: true},
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{typ: add1, running: 3, waiting: 1, started: false},
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{typ: add1, running: 3, waiting: 2, started: false},
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{typ: add1, running: 3, waiting: 3, started: false},
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{typ: done, running: 3, waiting: 2, started: true},
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{typ: add1, running: 3, waiting: 3, started: false},
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{typ: done, running: 3, waiting: 2, started: true},
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{typ: done, running: 3, waiting: 1, started: true},
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{typ: done, running: 3, waiting: 0, started: true},
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{typ: done, running: 2, waiting: 0, started: false},
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{typ: done, running: 1, waiting: 0, started: false},
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{typ: done, running: 0, waiting: 0, started: false},
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},
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}}
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for i, tc := range testCases {
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ctx := &testContext{
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startParallel: make(chan bool),
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maxParallel: tc.max,
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}
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for j, call := range tc.run {
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doCall := func(f func()) chan bool {
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done := make(chan bool)
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go func() {
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f()
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done <- true
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}()
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return done
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}
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started := false
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switch call.typ {
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case add1:
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signal := doCall(ctx.waitParallel)
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select {
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case <-signal:
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started = true
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case ctx.startParallel <- true:
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<-signal
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}
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case done:
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signal := doCall(ctx.release)
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select {
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case <-signal:
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case <-ctx.startParallel:
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started = true
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<-signal
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}
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}
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if started != call.started {
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t.Errorf("%d:%d:started: got %v; want %v", i, j, started, call.started)
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}
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if ctx.running != call.running {
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t.Errorf("%d:%d:running: got %v; want %v", i, j, ctx.running, call.running)
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}
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if ctx.numWaiting != call.waiting {
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t.Errorf("%d:%d:waiting: got %v; want %v", i, j, ctx.numWaiting, call.waiting)
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}
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}
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}
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}
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func TestTRun(t *T) {
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realTest := t
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testCases := []struct {
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desc string
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ok bool
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maxPar int
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chatty bool
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output string
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f func(*T)
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}{{
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desc: "failnow skips future sequential and parallel tests at same level",
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ok: false,
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maxPar: 1,
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output: `
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--- FAIL: failnow skips future sequential and parallel tests at same level (N.NNs)
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--- FAIL: failnow skips future sequential and parallel tests at same level/#00 (N.NNs)
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`,
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f: func(t *T) {
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ranSeq := false
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ranPar := false
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t.Run("", func(t *T) {
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t.Run("par", func(t *T) {
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t.Parallel()
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ranPar = true
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})
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t.Run("seq", func(t *T) {
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ranSeq = true
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})
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t.FailNow()
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t.Run("seq", func(t *T) {
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realTest.Error("test must be skipped")
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})
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t.Run("par", func(t *T) {
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t.Parallel()
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realTest.Error("test must be skipped.")
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})
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})
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if !ranPar {
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realTest.Error("parallel test was not run")
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}
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if !ranSeq {
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realTest.Error("sequential test was not run")
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}
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},
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}, {
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desc: "failure in parallel test propagates upwards",
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ok: false,
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maxPar: 1,
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output: `
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--- FAIL: failure in parallel test propagates upwards (N.NNs)
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--- FAIL: failure in parallel test propagates upwards/#00 (N.NNs)
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--- FAIL: failure in parallel test propagates upwards/#00/par (N.NNs)
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`,
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f: func(t *T) {
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t.Run("", func(t *T) {
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t.Parallel()
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t.Run("par", func(t *T) {
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t.Parallel()
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t.Fail()
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})
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})
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},
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}, {
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desc: "skipping without message, chatty",
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ok: true,
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chatty: true,
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output: `
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=== RUN skipping without message, chatty
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--- SKIP: skipping without message, chatty (N.NNs)`,
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f: func(t *T) { t.SkipNow() },
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}, {
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desc: "chatty with recursion",
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ok: true,
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chatty: true,
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output: `
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=== RUN chatty with recursion
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=== RUN chatty with recursion/#00
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=== RUN chatty with recursion/#00/#00
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--- PASS: chatty with recursion (N.NNs)
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--- PASS: chatty with recursion/#00 (N.NNs)
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--- PASS: chatty with recursion/#00/#00 (N.NNs)`,
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f: func(t *T) {
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t.Run("", func(t *T) {
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t.Run("", func(t *T) {})
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})
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},
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}, {
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desc: "skipping without message, not chatty",
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ok: true,
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f: func(t *T) { t.SkipNow() },
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}, {
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desc: "skipping after error",
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output: `
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--- FAIL: skipping after error (N.NNs)
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sub_test.go:NNN: an error
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sub_test.go:NNN: skipped`,
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f: func(t *T) {
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t.Error("an error")
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t.Skip("skipped")
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},
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}, {
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desc: "use Run to locally synchronize parallelism",
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ok: true,
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maxPar: 1,
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f: func(t *T) {
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var count uint32
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t.Run("waitGroup", func(t *T) {
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for i := 0; i < 4; i++ {
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t.Run("par", func(t *T) {
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t.Parallel()
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atomic.AddUint32(&count, 1)
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})
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}
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})
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if count != 4 {
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t.Errorf("count was %d; want 4", count)
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}
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},
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}, {
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desc: "alternate sequential and parallel",
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// Sequential tests should partake in the counting of running threads.
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// Otherwise, if one runs parallel subtests in sequential tests that are
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// itself subtests of parallel tests, the counts can get askew.
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ok: true,
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maxPar: 1,
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f: func(t *T) {
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t.Run("a", func(t *T) {
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t.Parallel()
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t.Run("b", func(t *T) {
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// Sequential: ensure running count is decremented.
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t.Run("c", func(t *T) {
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t.Parallel()
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})
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})
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})
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},
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}, {
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desc: "alternate sequential and parallel 2",
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// Sequential tests should partake in the counting of running threads.
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// Otherwise, if one runs parallel subtests in sequential tests that are
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// itself subtests of parallel tests, the counts can get askew.
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ok: true,
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maxPar: 2,
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f: func(t *T) {
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for i := 0; i < 2; i++ {
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t.Run("a", func(t *T) {
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t.Parallel()
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time.Sleep(time.Nanosecond)
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for i := 0; i < 2; i++ {
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t.Run("b", func(t *T) {
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time.Sleep(time.Nanosecond)
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for i := 0; i < 2; i++ {
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t.Run("c", func(t *T) {
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t.Parallel()
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time.Sleep(time.Nanosecond)
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})
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}
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})
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}
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})
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}
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},
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}, {
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desc: "stress test",
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ok: true,
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maxPar: 4,
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f: func(t *T) {
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t.Parallel()
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for i := 0; i < 12; i++ {
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t.Run("a", func(t *T) {
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t.Parallel()
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time.Sleep(time.Nanosecond)
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for i := 0; i < 12; i++ {
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t.Run("b", func(t *T) {
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time.Sleep(time.Nanosecond)
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for i := 0; i < 12; i++ {
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t.Run("c", func(t *T) {
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t.Parallel()
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time.Sleep(time.Nanosecond)
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t.Run("d1", func(t *T) {})
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t.Run("d2", func(t *T) {})
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t.Run("d3", func(t *T) {})
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t.Run("d4", func(t *T) {})
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})
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}
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})
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}
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})
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}
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},
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}, {
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desc: "skip output",
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ok: true,
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maxPar: 4,
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f: func(t *T) {
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t.Skip()
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},
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}, {
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desc: "subtest calls error on parent",
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ok: false,
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output: `
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--- FAIL: subtest calls error on parent (N.NNs)
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sub_test.go:NNN: first this
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sub_test.go:NNN: and now this!
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sub_test.go:NNN: oh, and this too`,
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maxPar: 1,
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f: func(t *T) {
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t.Errorf("first this")
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outer := t
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t.Run("", func(t *T) {
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outer.Errorf("and now this!")
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})
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t.Errorf("oh, and this too")
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},
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}, {
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desc: "subtest calls fatal on parent",
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ok: false,
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output: `
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--- FAIL: subtest calls fatal on parent (N.NNs)
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sub_test.go:NNN: first this
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sub_test.go:NNN: and now this!
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--- FAIL: subtest calls fatal on parent/#00 (N.NNs)
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testing.go:NNN: test executed panic(nil) or runtime.Goexit: subtest may have called FailNow on a parent test`,
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maxPar: 1,
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f: func(t *T) {
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outer := t
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t.Errorf("first this")
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t.Run("", func(t *T) {
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outer.Fatalf("and now this!")
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})
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t.Errorf("Should not reach here.")
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},
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}, {
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desc: "subtest calls error on ancestor",
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ok: false,
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output: `
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--- FAIL: subtest calls error on ancestor (N.NNs)
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sub_test.go:NNN: Report to ancestor
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--- FAIL: subtest calls error on ancestor/#00 (N.NNs)
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sub_test.go:NNN: Still do this
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sub_test.go:NNN: Also do this`,
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maxPar: 1,
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f: func(t *T) {
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outer := t
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t.Run("", func(t *T) {
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t.Run("", func(t *T) {
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outer.Errorf("Report to ancestor")
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})
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t.Errorf("Still do this")
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})
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t.Errorf("Also do this")
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},
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}, {
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desc: "subtest calls fatal on ancestor",
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ok: false,
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output: `
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--- FAIL: subtest calls fatal on ancestor (N.NNs)
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sub_test.go:NNN: Nope`,
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maxPar: 1,
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f: func(t *T) {
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outer := t
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t.Run("", func(t *T) {
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for i := 0; i < 4; i++ {
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t.Run("", func(t *T) {
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outer.Fatalf("Nope")
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})
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t.Errorf("Don't do this")
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}
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t.Errorf("And neither do this")
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})
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t.Errorf("Nor this")
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},
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}, {
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desc: "panic on goroutine fail after test exit",
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ok: false,
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maxPar: 4,
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f: func(t *T) {
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ch := make(chan bool)
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t.Run("", func(t *T) {
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go func() {
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<-ch
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defer func() {
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if r := recover(); r == nil {
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realTest.Errorf("expected panic")
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}
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ch <- true
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}()
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t.Errorf("failed after success")
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}()
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})
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ch <- true
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<-ch
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},
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}, {
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desc: "log in finished sub test logs to parent",
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ok: false,
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output: `
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--- FAIL: log in finished sub test logs to parent (N.NNs)
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sub_test.go:NNN: message2
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sub_test.go:NNN: message1
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sub_test.go:NNN: error`,
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maxPar: 1,
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f: func(t *T) {
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ch := make(chan bool)
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t.Run("sub", func(t2 *T) {
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go func() {
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<-ch
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t2.Log("message1")
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ch <- true
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}()
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})
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t.Log("message2")
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ch <- true
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<-ch
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t.Errorf("error")
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},
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}}
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for _, tc := range testCases {
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ctx := newTestContext(tc.maxPar, newMatcher(regexp.MatchString, "", ""))
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buf := &bytes.Buffer{}
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root := &T{
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common: common{
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signal: make(chan bool),
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name: "Test",
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w: buf,
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chatty: tc.chatty,
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},
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context: ctx,
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}
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ok := root.Run(tc.desc, tc.f)
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ctx.release()
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if ok != tc.ok {
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t.Errorf("%s:ok: got %v; want %v", tc.desc, ok, tc.ok)
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}
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if ok != !root.Failed() {
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t.Errorf("%s:root failed: got %v; want %v", tc.desc, !ok, root.Failed())
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}
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if ctx.running != 0 || ctx.numWaiting != 0 {
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t.Errorf("%s:running and waiting non-zero: got %d and %d", tc.desc, ctx.running, ctx.numWaiting)
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}
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got := strings.TrimSpace(buf.String())
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want := strings.TrimSpace(tc.output)
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re := makeRegexp(want)
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if ok, err := regexp.MatchString(re, got); !ok || err != nil {
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t.Errorf("%s:output:\ngot:\n%s\nwant:\n%s", tc.desc, got, want)
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}
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}
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}
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|
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func TestBRun(t *T) {
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work := func(b *B) {
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for i := 0; i < b.N; i++ {
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time.Sleep(time.Nanosecond)
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}
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}
|
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testCases := []struct {
|
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desc string
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failed bool
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chatty bool
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output string
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f func(*B)
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}{{
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desc: "simulate sequential run of subbenchmarks.",
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f: func(b *B) {
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b.Run("", func(b *B) { work(b) })
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time1 := b.result.NsPerOp()
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b.Run("", func(b *B) { work(b) })
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time2 := b.result.NsPerOp()
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if time1 >= time2 {
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t.Errorf("no time spent in benchmark t1 >= t2 (%d >= %d)", time1, time2)
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}
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},
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}, {
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desc: "bytes set by all benchmarks",
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f: func(b *B) {
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b.Run("", func(b *B) { b.SetBytes(10); work(b) })
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b.Run("", func(b *B) { b.SetBytes(10); work(b) })
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if b.result.Bytes != 20 {
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t.Errorf("bytes: got: %d; want 20", b.result.Bytes)
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}
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},
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}, {
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desc: "bytes set by some benchmarks",
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// In this case the bytes result is meaningless, so it must be 0.
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f: func(b *B) {
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b.Run("", func(b *B) { b.SetBytes(10); work(b) })
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b.Run("", func(b *B) { work(b) })
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b.Run("", func(b *B) { b.SetBytes(10); work(b) })
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if b.result.Bytes != 0 {
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t.Errorf("bytes: got: %d; want 0", b.result.Bytes)
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}
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},
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}, {
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desc: "failure carried over to root",
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failed: true,
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output: "--- FAIL: root",
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f: func(b *B) { b.Fail() },
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}, {
|
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desc: "skipping without message, chatty",
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chatty: true,
|
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output: "--- SKIP: root",
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f: func(b *B) { b.SkipNow() },
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}, {
|
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desc: "skipping with message, chatty",
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chatty: true,
|
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output: `
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--- SKIP: root
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sub_test.go:NNN: skipping`,
|
|
f: func(b *B) { b.Skip("skipping") },
|
|
}, {
|
|
desc: "chatty with recursion",
|
|
chatty: true,
|
|
f: func(b *B) {
|
|
b.Run("", func(b *B) {
|
|
b.Run("", func(b *B) {})
|
|
})
|
|
},
|
|
}, {
|
|
desc: "skipping without message, not chatty",
|
|
f: func(b *B) { b.SkipNow() },
|
|
}, {
|
|
desc: "skipping after error",
|
|
failed: true,
|
|
output: `
|
|
--- FAIL: root
|
|
sub_test.go:NNN: an error
|
|
sub_test.go:NNN: skipped`,
|
|
f: func(b *B) {
|
|
b.Error("an error")
|
|
b.Skip("skipped")
|
|
},
|
|
}, {
|
|
desc: "memory allocation",
|
|
f: func(b *B) {
|
|
const bufSize = 256
|
|
alloc := func(b *B) {
|
|
var buf [bufSize]byte
|
|
for i := 0; i < b.N; i++ {
|
|
_ = append([]byte(nil), buf[:]...)
|
|
}
|
|
}
|
|
b.Run("", func(b *B) {
|
|
alloc(b)
|
|
b.ReportAllocs()
|
|
})
|
|
b.Run("", func(b *B) {
|
|
alloc(b)
|
|
b.ReportAllocs()
|
|
})
|
|
// runtime.MemStats sometimes reports more allocations than the
|
|
// benchmark is responsible for. Luckily the point of this test is
|
|
// to ensure that the results are not underreported, so we can
|
|
// simply verify the lower bound.
|
|
if got := b.result.MemAllocs; got < 2 {
|
|
t.Errorf("MemAllocs was %v; want 2", got)
|
|
}
|
|
if got := b.result.MemBytes; got < 2*bufSize {
|
|
t.Errorf("MemBytes was %v; want %v", got, 2*bufSize)
|
|
}
|
|
},
|
|
}}
|
|
for _, tc := range testCases {
|
|
var ok bool
|
|
buf := &bytes.Buffer{}
|
|
// This is almost like the Benchmark function, except that we override
|
|
// the benchtime and catch the failure result of the subbenchmark.
|
|
root := &B{
|
|
common: common{
|
|
signal: make(chan bool),
|
|
name: "root",
|
|
w: buf,
|
|
chatty: tc.chatty,
|
|
},
|
|
benchFunc: func(b *B) { ok = b.Run("test", tc.f) }, // Use Run to catch failure.
|
|
benchTime: benchTimeFlag{d: 1 * time.Microsecond},
|
|
}
|
|
root.runN(1)
|
|
if ok != !tc.failed {
|
|
t.Errorf("%s:ok: got %v; want %v", tc.desc, ok, !tc.failed)
|
|
}
|
|
if !ok != root.Failed() {
|
|
t.Errorf("%s:root failed: got %v; want %v", tc.desc, !ok, root.Failed())
|
|
}
|
|
// All tests are run as subtests
|
|
if root.result.N != 1 {
|
|
t.Errorf("%s: N for parent benchmark was %d; want 1", tc.desc, root.result.N)
|
|
}
|
|
got := strings.TrimSpace(buf.String())
|
|
want := strings.TrimSpace(tc.output)
|
|
re := makeRegexp(want)
|
|
if ok, err := regexp.MatchString(re, got); !ok || err != nil {
|
|
t.Errorf("%s:output:\ngot:\n%s\nwant:\n%s", tc.desc, got, want)
|
|
}
|
|
}
|
|
}
|
|
|
|
func makeRegexp(s string) string {
|
|
s = regexp.QuoteMeta(s)
|
|
s = strings.ReplaceAll(s, ":NNN:", `:\d\d\d:`)
|
|
s = strings.ReplaceAll(s, "N\\.NNs", `\d*\.\d*s`)
|
|
return s
|
|
}
|
|
|
|
func TestBenchmarkOutput(t *T) {
|
|
// Ensure Benchmark initialized common.w by invoking it with an error and
|
|
// normal case.
|
|
Benchmark(func(b *B) { b.Error("do not print this output") })
|
|
Benchmark(func(b *B) {})
|
|
}
|
|
|
|
func TestBenchmarkStartsFrom1(t *T) {
|
|
var first = true
|
|
Benchmark(func(b *B) {
|
|
if first && b.N != 1 {
|
|
panic(fmt.Sprintf("Benchmark() first N=%v; want 1", b.N))
|
|
}
|
|
first = false
|
|
})
|
|
}
|
|
|
|
func TestBenchmarkReadMemStatsBeforeFirstRun(t *T) {
|
|
var first = true
|
|
Benchmark(func(b *B) {
|
|
if first && (b.startAllocs == 0 || b.startBytes == 0) {
|
|
panic(fmt.Sprintf("ReadMemStats not called before first run"))
|
|
}
|
|
first = false
|
|
})
|
|
}
|
|
|
|
func TestParallelSub(t *T) {
|
|
c := make(chan int)
|
|
block := make(chan int)
|
|
for i := 0; i < 10; i++ {
|
|
go func(i int) {
|
|
<-block
|
|
t.Run(fmt.Sprint(i), func(t *T) {})
|
|
c <- 1
|
|
}(i)
|
|
}
|
|
close(block)
|
|
for i := 0; i < 10; i++ {
|
|
<-c
|
|
}
|
|
}
|
|
|
|
type funcWriter func([]byte) (int, error)
|
|
|
|
func (fw funcWriter) Write(b []byte) (int, error) { return fw(b) }
|
|
|
|
func TestRacyOutput(t *T) {
|
|
var runs int32 // The number of running Writes
|
|
var races int32 // Incremented for each race detected
|
|
raceDetector := func(b []byte) (int, error) {
|
|
// Check if some other goroutine is concurrently calling Write.
|
|
if atomic.LoadInt32(&runs) > 0 {
|
|
atomic.AddInt32(&races, 1) // Race detected!
|
|
}
|
|
atomic.AddInt32(&runs, 1)
|
|
defer atomic.AddInt32(&runs, -1)
|
|
runtime.Gosched() // Increase probability of a race
|
|
return len(b), nil
|
|
}
|
|
|
|
var wg sync.WaitGroup
|
|
root := &T{
|
|
common: common{w: funcWriter(raceDetector), chatty: true},
|
|
context: newTestContext(1, newMatcher(regexp.MatchString, "", "")),
|
|
}
|
|
root.Run("", func(t *T) {
|
|
for i := 0; i < 100; i++ {
|
|
wg.Add(1)
|
|
go func(i int) {
|
|
defer wg.Done()
|
|
t.Run(fmt.Sprint(i), func(t *T) {
|
|
t.Logf("testing run %d", i)
|
|
})
|
|
}(i)
|
|
}
|
|
})
|
|
wg.Wait()
|
|
|
|
if races > 0 {
|
|
t.Errorf("detected %d racy Writes", races)
|
|
}
|
|
}
|
|
|
|
// The late log message did not include the test name. Issue 29388.
|
|
func TestLogAfterComplete(t *T) {
|
|
ctx := newTestContext(1, newMatcher(regexp.MatchString, "", ""))
|
|
var buf bytes.Buffer
|
|
t1 := &T{
|
|
common: common{
|
|
// Use a buffered channel so that tRunner can write
|
|
// to it although nothing is reading from it.
|
|
signal: make(chan bool, 1),
|
|
w: &buf,
|
|
},
|
|
context: ctx,
|
|
}
|
|
|
|
c1 := make(chan bool)
|
|
c2 := make(chan string)
|
|
tRunner(t1, func(t *T) {
|
|
t.Run("TestLateLog", func(t *T) {
|
|
go func() {
|
|
defer close(c2)
|
|
defer func() {
|
|
p := recover()
|
|
if p == nil {
|
|
c2 <- "subtest did not panic"
|
|
return
|
|
}
|
|
s, ok := p.(string)
|
|
if !ok {
|
|
c2 <- fmt.Sprintf("subtest panic with unexpected value %v", p)
|
|
return
|
|
}
|
|
const want = "Log in goroutine after TestLateLog has completed"
|
|
if !strings.Contains(s, want) {
|
|
c2 <- fmt.Sprintf("subtest panic %q does not contain %q", s, want)
|
|
}
|
|
}()
|
|
|
|
<-c1
|
|
t.Log("log after test")
|
|
}()
|
|
})
|
|
})
|
|
close(c1)
|
|
|
|
if s := <-c2; s != "" {
|
|
t.Error(s)
|
|
}
|
|
}
|
|
|
|
func TestBenchmark(t *T) {
|
|
res := Benchmark(func(b *B) {
|
|
for i := 0; i < 5; i++ {
|
|
b.Run("", func(b *B) {
|
|
for i := 0; i < b.N; i++ {
|
|
time.Sleep(time.Millisecond)
|
|
}
|
|
})
|
|
}
|
|
})
|
|
if res.NsPerOp() < 4000000 {
|
|
t.Errorf("want >5ms; got %v", time.Duration(res.NsPerOp()))
|
|
}
|
|
}
|