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// Copyright 2009 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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// These tests are too simple.
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Rdate = `[0-9][0-9][0-9][0-9]/[0-9][0-9]/[0-9][0-9]`
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Rtime = `[0-9][0-9]:[0-9][0-9]:[0-9][0-9]`
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Rmicroseconds = `\.[0-9][0-9][0-9][0-9][0-9][0-9]`
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Rline = `(54|56):` // must update if the calls to l.Printf / l.Print below move
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Rlongfile = `.*/[A-Za-z0-9_\-]+\.go:` + Rline
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Rshortfile = `[A-Za-z0-9_\-]+\.go:` + Rline
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pattern string // regexp that log output must match; we add ^ and expected_text$ always
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{Ldate, "", Rdate + " "},
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{Ltime, "", Rtime + " "},
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{Ltime | Lmicroseconds, "", Rtime + Rmicroseconds + " "},
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{Lmicroseconds, "", Rtime + Rmicroseconds + " "}, // microsec implies time
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{Llongfile, "", Rlongfile + " "},
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{Lshortfile, "", Rshortfile + " "},
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{Llongfile | Lshortfile, "", Rshortfile + " "}, // shortfile overrides longfile
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// everything at once:
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{Ldate | Ltime | Lmicroseconds | Llongfile, "XXX", "XXX" + Rdate + " " + Rtime + Rmicroseconds + " " + Rlongfile + " "},
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{Ldate | Ltime | Lmicroseconds | Lshortfile, "XXX", "XXX" + Rdate + " " + Rtime + Rmicroseconds + " " + Rshortfile + " "},
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// Test using Println("hello", 23, "world") or using Printf("hello %d world", 23)
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func testPrint(t *testing.T, flag int, prefix string, pattern string, useFormat bool) {
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buf := new(bytes.Buffer)
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Printf("hello %d world", 23)
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Println("hello", 23, "world")
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line = line[0 : len(line)-1]
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pattern = "^" + pattern + "hello 23 world$"
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matched, err4 := regexp.MatchString(pattern, line)
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t.Fatal("pattern did not compile:", err4)
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t.Errorf("log output should match %q is %q", pattern, line)
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func TestAll(t *testing.T) {
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for _, testcase := range tests {
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testPrint(t, testcase.flag, testcase.prefix, testcase.pattern, false)
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testPrint(t, testcase.flag, testcase.prefix, testcase.pattern, true)
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func TestOutput(t *testing.T) {
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const testString = "test"
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if expect := testString + "\n"; b.String() != expect {
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t.Errorf("log output should match %q is %q", expect, b.String())