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Diffstat (limited to 'src/testing/testing.go')
-rw-r--r--src/testing/testing.go138
1 files changed, 64 insertions, 74 deletions
diff --git a/src/testing/testing.go b/src/testing/testing.go
index e3dcee512b..bf9fce6b3e 100644
--- a/src/testing/testing.go
+++ b/src/testing/testing.go
@@ -320,7 +320,6 @@ var (
cpuListStr *string
parallel *int
testlog *string
- printer *testPrinter
haveExamples bool // are there examples?
@@ -330,55 +329,45 @@ var (
numFailed uint32 // number of test failures
)
-type testPrinter struct {
- chatty bool
-
+type chattyPrinter struct {
+ w io.Writer
lastNameMu sync.Mutex // guards lastName
lastName string // last printed test name in chatty mode
}
-func newTestPrinter(chatty bool) *testPrinter {
- return &testPrinter{
- chatty: chatty,
- }
+func newChattyPrinter(w io.Writer) *chattyPrinter {
+ return &chattyPrinter{w: w}
}
-func (p *testPrinter) Print(testName, out string) {
- p.Fprint(os.Stdout, testName, out)
+// Updatef prints a message about the status of the named test to w.
+//
+// The formatted message must include the test name itself.
+func (p *chattyPrinter) Updatef(testName, format string, args ...interface{}) {
+ p.lastNameMu.Lock()
+ defer p.lastNameMu.Unlock()
+
+ // Since the message already implies an association with a specific new test,
+ // we don't need to check what the old test name was or log an extra CONT line
+ // for it. (We're updating it anyway, and the current message already includes
+ // the test name.)
+ p.lastName = testName
+ fmt.Fprintf(p.w, format, args...)
}
-func (p *testPrinter) Fprint(w io.Writer, testName, out string) {
+// Printf prints a message, generated by the named test, that does not
+// necessarily mention that tests's name itself.
+func (p *chattyPrinter) Printf(testName, format string, args ...interface{}) {
p.lastNameMu.Lock()
defer p.lastNameMu.Unlock()
- if !p.chatty ||
- strings.HasPrefix(out, "--- PASS: ") ||
- strings.HasPrefix(out, "--- FAIL: ") ||
- strings.HasPrefix(out, "--- SKIP: ") ||
- strings.HasPrefix(out, "=== RUN ") ||
- strings.HasPrefix(out, "=== CONT ") ||
- strings.HasPrefix(out, "=== PAUSE ") {
- // If we're buffering test output (!p.chatty), we don't really care which
- // test is emitting which line so long as they are serialized.
- //
- // If the message already implies an association with a specific new test,
- // we don't need to check what the old test name was or log an extra CONT
- // line for it. (We're updating it anyway, and the current message already
- // includes the test name.)
- p.lastName = testName
- fmt.Fprint(w, out)
- return
- }
-
if p.lastName == "" {
p.lastName = testName
} else if p.lastName != testName {
- // Always printed as-is, with 0 decoration or indentation. So, we skip
- // printing to w.
- fmt.Printf("=== CONT %s\n", testName)
+ fmt.Fprintf(p.w, "=== CONT %s\n", testName)
p.lastName = testName
}
- fmt.Fprint(w, out)
+
+ fmt.Fprintf(p.w, format, args...)
}
// The maximum number of stack frames to go through when skipping helper functions for
@@ -398,12 +387,12 @@ type common struct {
helpers map[string]struct{} // functions to be skipped when writing file/line info
cleanup func() // optional function to be called at the end of the test
- chatty bool // A copy of the chatty flag.
- bench bool // Whether the current test is a benchmark.
- finished bool // Test function has completed.
- hasSub int32 // Written atomically.
- raceErrors int // Number of races detected during test.
- runner string // Function name of tRunner running the test.
+ chatty *chattyPrinter // A copy of chattyPrinter, if the chatty flag is set.
+ bench bool // Whether the current test is a benchmark.
+ finished bool // Test function has completed.
+ hasSub int32 // Written atomically.
+ raceErrors int // Number of races detected during test.
+ runner string // Function name of tRunner running the test.
parent *common
level int // Nesting depth of test or benchmark.
@@ -556,12 +545,31 @@ func (c *common) flushToParent(testName, format string, args ...interface{}) {
p.mu.Lock()
defer p.mu.Unlock()
- printer.Fprint(p.w, testName, fmt.Sprintf(format, args...))
-
c.mu.Lock()
defer c.mu.Unlock()
- io.Copy(p.w, bytes.NewReader(c.output))
- c.output = c.output[:0]
+
+ if len(c.output) > 0 {
+ format += "%s"
+ args = append(args[:len(args):len(args)], c.output)
+ c.output = c.output[:0] // but why?
+ }
+
+ if c.chatty != nil && p.w == c.chatty.w {
+ // We're flushing to the actual output, so track that this output is
+ // associated with a specific test (and, specifically, that the next output
+ // is *not* associated with that test).
+ //
+ // Moreover, if c.output is non-empty it is important that this write be
+ // atomic with respect to the output of other tests, so that we don't end up
+ // with confusing '=== CONT' lines in the middle of our '--- PASS' block.
+ // Neither humans nor cmd/test2json can parse those easily.
+ // (See https://golang.org/issue/40771.)
+ c.chatty.Updatef(testName, format, args...)
+ } else {
+ // We're flushing to the output buffer of the parent test, which will
+ // itself follow a test-name header when it is finally flushed to stdout.
+ fmt.Fprintf(p.w, format, args...)
+ }
}
type indenter struct {
@@ -729,13 +737,13 @@ func (c *common) logDepth(s string, depth int) {
}
panic("Log in goroutine after " + c.name + " has completed")
} else {
- if c.chatty {
+ if c.chatty != nil {
if c.bench {
// Benchmarks don't print === CONT, so we should skip the test
// printer and just print straight to stdout.
fmt.Print(c.decorate(s, depth+1))
} else {
- printer.Print(c.name, c.decorate(s, depth+1))
+ c.chatty.Printf(c.name, "%s", c.decorate(s, depth+1))
}
return
@@ -910,34 +918,22 @@ func (t *T) Parallel() {
t.parent.sub = append(t.parent.sub, t)
t.raceErrors += race.Errors()
- if t.chatty {
- // Print directly to root's io.Writer so there is no delay.
- root := t.parent
- for ; root.parent != nil; root = root.parent {
- }
- root.mu.Lock()
+ if t.chatty != nil {
// Unfortunately, even though PAUSE indicates that the named test is *no
// longer* running, cmd/test2json interprets it as changing the active test
// for the purpose of log parsing. We could fix cmd/test2json, but that
// won't fix existing deployments of third-party tools that already shell
// out to older builds of cmd/test2json — so merely fixing cmd/test2json
// isn't enough for now.
- printer.Fprint(root.w, t.name, fmt.Sprintf("=== PAUSE %s\n", t.name))
- root.mu.Unlock()
+ t.chatty.Updatef(t.name, "=== PAUSE %s\n", t.name)
}
t.signal <- true // Release calling test.
<-t.parent.barrier // Wait for the parent test to complete.
t.context.waitParallel()
- if t.chatty {
- // Print directly to root's io.Writer so there is no delay.
- root := t.parent
- for ; root.parent != nil; root = root.parent {
- }
- root.mu.Lock()
- printer.Fprint(root.w, t.name, fmt.Sprintf("=== CONT %s\n", t.name))
- root.mu.Unlock()
+ if t.chatty != nil {
+ t.chatty.Updatef(t.name, "=== CONT %s\n", t.name)
}
t.start = time.Now()
@@ -1088,14 +1084,8 @@ func (t *T) Run(name string, f func(t *T)) bool {
}
t.w = indenter{&t.common}
- if t.chatty {
- // Print directly to root's io.Writer so there is no delay.
- root := t.parent
- for ; root.parent != nil; root = root.parent {
- }
- root.mu.Lock()
- printer.Fprint(root.w, t.name, fmt.Sprintf("=== RUN %s\n", t.name))
- root.mu.Unlock()
+ if t.chatty != nil {
+ t.chatty.Updatef(t.name, "=== RUN %s\n", t.name)
}
// Instead of reducing the running count of this test before calling the
// tRunner and increasing it afterwards, we rely on tRunner keeping the
@@ -1242,8 +1232,6 @@ func (m *M) Run() int {
flag.Parse()
}
- printer = newTestPrinter(Verbose())
-
if *parallel < 1 {
fmt.Fprintln(os.Stderr, "testing: -parallel can only be given a positive integer")
flag.Usage()
@@ -1284,7 +1272,7 @@ func (t *T) report() {
format := "--- %s: %s (%s)\n"
if t.Failed() {
t.flushToParent(t.name, format, "FAIL", t.name, dstr)
- } else if t.chatty {
+ } else if t.chatty != nil {
if t.Skipped() {
t.flushToParent(t.name, format, "SKIP", t.name, dstr)
} else {
@@ -1340,10 +1328,12 @@ func runTests(matchString func(pat, str string) (bool, error), tests []InternalT
signal: make(chan bool),
barrier: make(chan bool),
w: os.Stdout,
- chatty: *chatty,
},
context: ctx,
}
+ if Verbose() {
+ t.chatty = newChattyPrinter(t.w)
+ }
tRunner(t, func(t *T) {
for _, test := range tests {
t.Run(test.Name, test.F)
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