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// Copyright 2009 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 log
// These tests are too simple.
import (
"bytes"
"os"
"regexp"
"testing"
)
const (
Rdate = `[0-9][0-9][0-9][0-9]/[0-9][0-9]/[0-9][0-9]`
Rtime = `[0-9][0-9]:[0-9][0-9]:[0-9][0-9]`
Rmicroseconds = `\.[0-9][0-9][0-9][0-9][0-9][0-9]`
Rline = `(54|56):` // must update if the calls to l.Printf / l.Print below move
Rlongfile = `.*/[A-Za-z0-9_\-]+\.go:` + Rline
Rshortfile = `[A-Za-z0-9_\-]+\.go:` + Rline
)
type tester struct {
flag int
prefix string
pattern string // regexp that log output must match; we add ^ and expected_text$ always
}
var tests = []tester{
// individual pieces:
{0, "", ""},
{0, "XXX", "XXX"},
{Ldate, "", Rdate + " "},
{Ltime, "", Rtime + " "},
{Ltime | Lmicroseconds, "", Rtime + Rmicroseconds + " "},
{Lmicroseconds, "", Rtime + Rmicroseconds + " "}, // microsec implies time
{Llongfile, "", Rlongfile + " "},
{Lshortfile, "", Rshortfile + " "},
{Llongfile | Lshortfile, "", Rshortfile + " "}, // shortfile overrides longfile
// everything at once:
{Ldate | Ltime | Lmicroseconds | Llongfile, "XXX", "XXX" + Rdate + " " + Rtime + Rmicroseconds + " " + Rlongfile + " "},
{Ldate | Ltime | Lmicroseconds | Lshortfile, "XXX", "XXX" + Rdate + " " + Rtime + Rmicroseconds + " " + Rshortfile + " "},
}
// Test using Println("hello", 23, "world") or using Printf("hello %d world", 23)
func testPrint(t *testing.T, flag int, prefix string, pattern string, useFormat bool) {
buf := new(bytes.Buffer)
SetOutput(buf)
SetFlags(flag)
SetPrefix(prefix)
if useFormat {
Printf("hello %d world", 23)
} else {
Println("hello", 23, "world")
}
line := buf.String()
line = line[0 : len(line)-1]
pattern = "^" + pattern + "hello 23 world$"
matched, err4 := regexp.MatchString(pattern, line)
if err4 != nil {
t.Fatal("pattern did not compile:", err4)
}
if !matched {
t.Errorf("log output should match %q is %q", pattern, line)
}
SetOutput(os.Stderr)
}
func TestAll(t *testing.T) {
for _, testcase := range tests {
testPrint(t, testcase.flag, testcase.prefix, testcase.pattern, false)
testPrint(t, testcase.flag, testcase.prefix, testcase.pattern, true)
}
}
func TestOutput(t *testing.T) {
const testString = "test"
var b bytes.Buffer
l := New(&b, "", 0)
l.Println(testString)
if expect := testString + "\n"; b.String() != expect {
t.Errorf("log output should match %q is %q", expect, b.String())
}
}
func TestFlagAndPrefixSetting(t *testing.T) {
var b bytes.Buffer
l := New(&b, "Test:", LstdFlags)
f := l.Flags()
if f != LstdFlags {
t.Errorf("Flags 1: expected %x got %x", LstdFlags, f)
}
l.SetFlags(f | Lmicroseconds)
f = l.Flags()
if f != LstdFlags|Lmicroseconds {
t.Errorf("Flags 2: expected %x got %x", LstdFlags|Lmicroseconds, f)
}
p := l.Prefix()
if p != "Test:" {
t.Errorf(`Prefix: expected "Test:" got %q`, p)
}
l.SetPrefix("Reality:")
p = l.Prefix()
if p != "Reality:" {
t.Errorf(`Prefix: expected "Reality:" got %q`, p)
}
// Verify a log message looks right, with our prefix and microseconds present.
l.Print("hello")
pattern := "^Reality:" + Rdate + " " + Rtime + Rmicroseconds + " hello\n"
matched, err := regexp.Match(pattern, b.Bytes())
if err != nil {
t.Fatalf("pattern %q did not compile: %s", pattern, err)
}
if !matched {
t.Error("message did not match pattern")
}
}
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