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document testing and incidentally gotest

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R=rsc
DELTA=25  (25 added, 0 deleted, 0 changed)
OCL=25798
CL=25802
This commit is contained in:
Rob Pike 2009-03-05 17:50:36 -08:00
parent 83af3229db
commit 681299a444
1 changed files with 25 additions and 0 deletions
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25
src/lib/testing.go
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@ -2,6 +2,13 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// The testing package provides support for automated testing of Go packages.
// It is intended to be used in concert with the ``gotest'' utility, which automates
// execution of any function of the form
// func TestXxx(*testing.T)
// where Xxx can by any alphanumeric string (but the first letter must not be in
// [a-z]) and serves to identify the test routine.
// These TestXxx routines should be declared within the package they are testing.
package testing
import (
@ -9,6 +16,7 @@ import (
"flag";
)
// Report as tests are run; default is silent for success.
var chatty = flag.Bool("chatty", false, "chatty")
// Insert tabs after newlines - but not the last one
@ -21,26 +29,35 @@ func tabify(s string) string {
return s
}
// T is a type passed to Test functions to manage test state and support formatted test logs.
// Logs are accumulated during execution and dumped to standard error when done.
type T struct {
errors string;
failed bool;
ch chan *T;
}
// Fail marks the Test function as having failed but continues execution.
func (t *T) Fail() {
t.failed = true
}
// FailNow marks the Test function as having failed and stops its execution.
// Execution will continue at the next Test.
func (t *T) FailNow() {
t.Fail();
t.ch <- t;
sys.Goexit();
}
// Log formats its arguments using default formatting, analogous to Print(),
// and records the text in the error log.
func (t *T) Log(args ...) {
t.errors += "\t" + tabify(fmt.Sprintln(args));
}
// Log formats its arguments according to the format, analogous to Printf(),
// and records the text in the error log.
func (t *T) Logf(format string, args ...) {
t.errors += tabify(fmt.Sprintf("\t" + format, args));
l := len(t.errors);
@ -49,26 +66,32 @@ func (t *T) Logf(format string, args ...) {
}
}
// Error is equivalent to Log() followed by Fail().
func (t *T) Error(args ...) {
t.Log(args);
t.Fail();
}
// Errorf is equivalent to Logf() followed by Fail().
func (t *T) Errorf(format string, args ...) {
t.Logf(format, args);
t.Fail();
}
// Fatal is equivalent to Log() followed by FailNow().
func (t *T) Fatal(args ...) {
t.Log(args);
t.FailNow();
}
// Fatalf is equivalent to Logf() followed by FailNow().
func (t *T) Fatalf(format string, args ...) {
t.Logf(format, args);
t.FailNow();
}
// An internal type but exported because it is cross-package; part of the implementation
// of gotest.
type Test struct {
Name string;
F func(*T);
@ -79,6 +102,8 @@ func tRunner(t *T, test *Test) {
t.ch <- t;
}
// An internal function but exported because it is cross-package; part of the implementation
// of gotest.
func Main(tests []Test) {
flag.Parse();
ok := true;