mirror of git://gcc.gnu.org/git/gcc.git
518 lines
13 KiB
Go
518 lines
13 KiB
Go
// Copyright 2016 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
|
|
|
|
import (
|
|
"bytes"
|
|
"regexp"
|
|
"strings"
|
|
"sync/atomic"
|
|
"time"
|
|
)
|
|
|
|
func TestTestContext(t *T) {
|
|
const (
|
|
add1 = 0
|
|
done = 1
|
|
)
|
|
// After each of the calls are applied to the context, the
|
|
type call struct {
|
|
typ int // run or done
|
|
// result from applying the call
|
|
running int
|
|
waiting int
|
|
started bool
|
|
}
|
|
testCases := []struct {
|
|
max int
|
|
run []call
|
|
}{{
|
|
max: 1,
|
|
run: []call{
|
|
{typ: add1, running: 1, waiting: 0, started: true},
|
|
{typ: done, running: 0, waiting: 0, started: false},
|
|
},
|
|
}, {
|
|
max: 1,
|
|
run: []call{
|
|
{typ: add1, running: 1, waiting: 0, started: true},
|
|
{typ: add1, running: 1, waiting: 1, started: false},
|
|
{typ: done, running: 1, waiting: 0, started: true},
|
|
{typ: done, running: 0, waiting: 0, started: false},
|
|
{typ: add1, running: 1, waiting: 0, started: true},
|
|
},
|
|
}, {
|
|
max: 3,
|
|
run: []call{
|
|
{typ: add1, running: 1, waiting: 0, started: true},
|
|
{typ: add1, running: 2, waiting: 0, started: true},
|
|
{typ: add1, running: 3, waiting: 0, started: true},
|
|
{typ: add1, running: 3, waiting: 1, started: false},
|
|
{typ: add1, running: 3, waiting: 2, started: false},
|
|
{typ: add1, running: 3, waiting: 3, started: false},
|
|
{typ: done, running: 3, waiting: 2, started: true},
|
|
{typ: add1, running: 3, waiting: 3, started: false},
|
|
{typ: done, running: 3, waiting: 2, started: true},
|
|
{typ: done, running: 3, waiting: 1, started: true},
|
|
{typ: done, running: 3, waiting: 0, started: true},
|
|
{typ: done, running: 2, waiting: 0, started: false},
|
|
{typ: done, running: 1, waiting: 0, started: false},
|
|
{typ: done, running: 0, waiting: 0, started: false},
|
|
},
|
|
}}
|
|
for i, tc := range testCases {
|
|
ctx := &testContext{
|
|
startParallel: make(chan bool),
|
|
maxParallel: tc.max,
|
|
}
|
|
for j, call := range tc.run {
|
|
doCall := func(f func()) chan bool {
|
|
done := make(chan bool)
|
|
go func() {
|
|
f()
|
|
done <- true
|
|
}()
|
|
return done
|
|
}
|
|
started := false
|
|
switch call.typ {
|
|
case add1:
|
|
signal := doCall(ctx.waitParallel)
|
|
select {
|
|
case <-signal:
|
|
started = true
|
|
case ctx.startParallel <- true:
|
|
<-signal
|
|
}
|
|
case done:
|
|
signal := doCall(ctx.release)
|
|
select {
|
|
case <-signal:
|
|
case <-ctx.startParallel:
|
|
started = true
|
|
<-signal
|
|
}
|
|
}
|
|
if started != call.started {
|
|
t.Errorf("%d:%d:started: got %v; want %v", i, j, started, call.started)
|
|
}
|
|
if ctx.running != call.running {
|
|
t.Errorf("%d:%d:running: got %v; want %v", i, j, ctx.running, call.running)
|
|
}
|
|
if ctx.numWaiting != call.waiting {
|
|
t.Errorf("%d:%d:waiting: got %v; want %v", i, j, ctx.numWaiting, call.waiting)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestTRun(t *T) {
|
|
realTest := t
|
|
testCases := []struct {
|
|
desc string
|
|
ok bool
|
|
maxPar int
|
|
chatty bool
|
|
output string
|
|
f func(*T)
|
|
}{{
|
|
desc: "failnow skips future sequential and parallel tests at same level",
|
|
ok: false,
|
|
maxPar: 1,
|
|
output: `
|
|
--- FAIL: failnow skips future sequential and parallel tests at same level (N.NNs)
|
|
--- FAIL: failnow skips future sequential and parallel tests at same level/#00 (N.NNs)
|
|
`,
|
|
f: func(t *T) {
|
|
ranSeq := false
|
|
ranPar := false
|
|
t.Run("", func(t *T) {
|
|
t.Run("par", func(t *T) {
|
|
t.Parallel()
|
|
ranPar = true
|
|
})
|
|
t.Run("seq", func(t *T) {
|
|
ranSeq = true
|
|
})
|
|
t.FailNow()
|
|
t.Run("seq", func(t *T) {
|
|
realTest.Error("test must be skipped")
|
|
})
|
|
t.Run("par", func(t *T) {
|
|
t.Parallel()
|
|
realTest.Error("test must be skipped.")
|
|
})
|
|
})
|
|
if !ranPar {
|
|
realTest.Error("parallel test was not run")
|
|
}
|
|
if !ranSeq {
|
|
realTest.Error("sequential test was not run")
|
|
}
|
|
},
|
|
}, {
|
|
desc: "failure in parallel test propagates upwards",
|
|
ok: false,
|
|
maxPar: 1,
|
|
output: `
|
|
--- FAIL: failure in parallel test propagates upwards (N.NNs)
|
|
--- FAIL: failure in parallel test propagates upwards/#00 (N.NNs)
|
|
--- FAIL: failure in parallel test propagates upwards/#00/par (N.NNs)
|
|
`,
|
|
f: func(t *T) {
|
|
t.Run("", func(t *T) {
|
|
t.Parallel()
|
|
t.Run("par", func(t *T) {
|
|
t.Parallel()
|
|
t.Fail()
|
|
})
|
|
})
|
|
},
|
|
}, {
|
|
desc: "skipping without message, chatty",
|
|
ok: true,
|
|
chatty: true,
|
|
output: `
|
|
=== RUN skipping without message, chatty
|
|
--- SKIP: skipping without message, chatty (N.NNs)`,
|
|
f: func(t *T) { t.SkipNow() },
|
|
}, {
|
|
desc: "chatty with recursion",
|
|
ok: true,
|
|
chatty: true,
|
|
output: `
|
|
=== RUN chatty with recursion
|
|
=== RUN chatty with recursion/#00
|
|
=== RUN chatty with recursion/#00/#00
|
|
--- PASS: chatty with recursion (N.NNs)
|
|
--- PASS: chatty with recursion/#00 (N.NNs)
|
|
--- PASS: chatty with recursion/#00/#00 (N.NNs)`,
|
|
f: func(t *T) {
|
|
t.Run("", func(t *T) {
|
|
t.Run("", func(t *T) {})
|
|
})
|
|
},
|
|
}, {
|
|
desc: "skipping without message, not chatty",
|
|
ok: true,
|
|
f: func(t *T) { t.SkipNow() },
|
|
}, {
|
|
desc: "skipping after error",
|
|
output: `
|
|
--- FAIL: skipping after error (N.NNs)
|
|
sub_test.go:NNN: an error
|
|
sub_test.go:NNN: skipped`,
|
|
f: func(t *T) {
|
|
t.Error("an error")
|
|
t.Skip("skipped")
|
|
},
|
|
}, {
|
|
desc: "use Run to locally synchronize parallelism",
|
|
ok: true,
|
|
maxPar: 1,
|
|
f: func(t *T) {
|
|
var count uint32
|
|
t.Run("waitGroup", func(t *T) {
|
|
for i := 0; i < 4; i++ {
|
|
t.Run("par", func(t *T) {
|
|
t.Parallel()
|
|
atomic.AddUint32(&count, 1)
|
|
})
|
|
}
|
|
})
|
|
if count != 4 {
|
|
t.Errorf("count was %d; want 4", count)
|
|
}
|
|
},
|
|
}, {
|
|
desc: "alternate sequential and parallel",
|
|
// Sequential tests should partake in the counting of running threads.
|
|
// Otherwise, if one runs parallel subtests in sequential tests that are
|
|
// itself subtests of parallel tests, the counts can get askew.
|
|
ok: true,
|
|
maxPar: 1,
|
|
f: func(t *T) {
|
|
t.Run("a", func(t *T) {
|
|
t.Parallel()
|
|
t.Run("b", func(t *T) {
|
|
// Sequential: ensure running count is decremented.
|
|
t.Run("c", func(t *T) {
|
|
t.Parallel()
|
|
})
|
|
|
|
})
|
|
})
|
|
},
|
|
}, {
|
|
desc: "alternate sequential and parallel 2",
|
|
// Sequential tests should partake in the counting of running threads.
|
|
// Otherwise, if one runs parallel subtests in sequential tests that are
|
|
// itself subtests of parallel tests, the counts can get askew.
|
|
ok: true,
|
|
maxPar: 2,
|
|
f: func(t *T) {
|
|
for i := 0; i < 2; i++ {
|
|
t.Run("a", func(t *T) {
|
|
t.Parallel()
|
|
time.Sleep(time.Nanosecond)
|
|
for i := 0; i < 2; i++ {
|
|
t.Run("b", func(t *T) {
|
|
time.Sleep(time.Nanosecond)
|
|
for i := 0; i < 2; i++ {
|
|
t.Run("c", func(t *T) {
|
|
t.Parallel()
|
|
time.Sleep(time.Nanosecond)
|
|
})
|
|
}
|
|
|
|
})
|
|
}
|
|
})
|
|
}
|
|
},
|
|
}, {
|
|
desc: "stress test",
|
|
ok: true,
|
|
maxPar: 4,
|
|
f: func(t *T) {
|
|
t.Parallel()
|
|
for i := 0; i < 12; i++ {
|
|
t.Run("a", func(t *T) {
|
|
t.Parallel()
|
|
time.Sleep(time.Nanosecond)
|
|
for i := 0; i < 12; i++ {
|
|
t.Run("b", func(t *T) {
|
|
time.Sleep(time.Nanosecond)
|
|
for i := 0; i < 12; i++ {
|
|
t.Run("c", func(t *T) {
|
|
t.Parallel()
|
|
time.Sleep(time.Nanosecond)
|
|
t.Run("d1", func(t *T) {})
|
|
t.Run("d2", func(t *T) {})
|
|
t.Run("d3", func(t *T) {})
|
|
t.Run("d4", func(t *T) {})
|
|
})
|
|
}
|
|
})
|
|
}
|
|
})
|
|
}
|
|
},
|
|
}, {
|
|
desc: "skip output",
|
|
ok: true,
|
|
maxPar: 4,
|
|
f: func(t *T) {
|
|
t.Skip()
|
|
},
|
|
}, {
|
|
desc: "panic on goroutine fail after test exit",
|
|
ok: false,
|
|
maxPar: 4,
|
|
f: func(t *T) {
|
|
ch := make(chan bool)
|
|
t.Run("", func(t *T) {
|
|
go func() {
|
|
<-ch
|
|
defer func() {
|
|
if r := recover(); r == nil {
|
|
realTest.Errorf("expected panic")
|
|
}
|
|
ch <- true
|
|
}()
|
|
t.Errorf("failed after success")
|
|
}()
|
|
})
|
|
ch <- true
|
|
<-ch
|
|
},
|
|
}}
|
|
for _, tc := range testCases {
|
|
ctx := newTestContext(tc.maxPar, newMatcher(regexp.MatchString, "", ""))
|
|
buf := &bytes.Buffer{}
|
|
root := &T{
|
|
common: common{
|
|
signal: make(chan bool),
|
|
name: "Test",
|
|
w: buf,
|
|
chatty: tc.chatty,
|
|
},
|
|
context: ctx,
|
|
}
|
|
ok := root.Run(tc.desc, tc.f)
|
|
ctx.release()
|
|
|
|
if ok != tc.ok {
|
|
t.Errorf("%s:ok: got %v; want %v", tc.desc, ok, tc.ok)
|
|
}
|
|
if ok != !root.Failed() {
|
|
t.Errorf("%s:root failed: got %v; want %v", tc.desc, !ok, root.Failed())
|
|
}
|
|
if ctx.running != 0 || ctx.numWaiting != 0 {
|
|
t.Errorf("%s:running and waiting non-zero: got %d and %d", tc.desc, ctx.running, ctx.numWaiting)
|
|
}
|
|
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:ouput:\ngot:\n%s\nwant:\n%s", tc.desc, got, want)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestBRun(t *T) {
|
|
work := func(b *B) {
|
|
for i := 0; i < b.N; i++ {
|
|
time.Sleep(time.Nanosecond)
|
|
}
|
|
}
|
|
testCases := []struct {
|
|
desc string
|
|
failed bool
|
|
chatty bool
|
|
output string
|
|
f func(*B)
|
|
}{{
|
|
desc: "simulate sequential run of subbenchmarks.",
|
|
f: func(b *B) {
|
|
b.Run("", func(b *B) { work(b) })
|
|
time1 := b.result.NsPerOp()
|
|
b.Run("", func(b *B) { work(b) })
|
|
time2 := b.result.NsPerOp()
|
|
if time1 >= time2 {
|
|
t.Errorf("no time spent in benchmark t1 >= t2 (%d >= %d)", time1, time2)
|
|
}
|
|
},
|
|
}, {
|
|
desc: "bytes set by all benchmarks",
|
|
f: func(b *B) {
|
|
b.Run("", func(b *B) { b.SetBytes(10); work(b) })
|
|
b.Run("", func(b *B) { b.SetBytes(10); work(b) })
|
|
if b.result.Bytes != 20 {
|
|
t.Errorf("bytes: got: %d; want 20", b.result.Bytes)
|
|
}
|
|
},
|
|
}, {
|
|
desc: "bytes set by some benchmarks",
|
|
// In this case the bytes result is meaningless, so it must be 0.
|
|
f: func(b *B) {
|
|
b.Run("", func(b *B) { b.SetBytes(10); work(b) })
|
|
b.Run("", func(b *B) { work(b) })
|
|
b.Run("", func(b *B) { b.SetBytes(10); work(b) })
|
|
if b.result.Bytes != 0 {
|
|
t.Errorf("bytes: got: %d; want 0", b.result.Bytes)
|
|
}
|
|
},
|
|
}, {
|
|
desc: "failure carried over to root",
|
|
failed: true,
|
|
output: "--- FAIL: root",
|
|
f: func(b *B) { b.Fail() },
|
|
}, {
|
|
desc: "skipping without message, chatty",
|
|
chatty: true,
|
|
output: "--- SKIP: root",
|
|
f: func(b *B) { b.SkipNow() },
|
|
}, {
|
|
desc: "skipping with message, chatty",
|
|
chatty: true,
|
|
output: `
|
|
--- SKIP: root
|
|
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.Run("", func(b *B) { alloc(b) })
|
|
// 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: 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:ouput:\ngot:\n%s\nwant:\n%s", tc.desc, got, want)
|
|
}
|
|
}
|
|
}
|
|
|
|
func makeRegexp(s string) string {
|
|
s = strings.Replace(s, ":NNN:", `:\d\d\d:`, -1)
|
|
s = strings.Replace(s, "(N.NNs)", `\(\d*\.\d*s\)`, -1)
|
|
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) {})
|
|
}
|