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jeremybenn |
// 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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package fmt_test
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import (
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"bytes"
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. "fmt"
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"io"
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"math"
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"runtime" // for the malloc count test only
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"strings"
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"testing"
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"time"
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)
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type (
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renamedBool bool
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renamedInt int
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renamedInt8 int8
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renamedInt16 int16
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renamedInt32 int32
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renamedInt64 int64
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renamedUint uint
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renamedUint8 uint8
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renamedUint16 uint16
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renamedUint32 uint32
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renamedUint64 uint64
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renamedUintptr uintptr
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renamedString string
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renamedBytes []byte
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renamedFloat32 float32
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renamedFloat64 float64
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renamedComplex64 complex64
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renamedComplex128 complex128
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)
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func TestFmtInterface(t *testing.T) {
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var i1 interface{}
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i1 = "abc"
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s := Sprintf("%s", i1)
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if s != "abc" {
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t.Errorf(`Sprintf("%%s", empty("abc")) = %q want %q`, s, "abc")
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}
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}
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const b32 uint32 = 1<<32 - 1
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const b64 uint64 = 1<<64 - 1
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var array = [5]int{1, 2, 3, 4, 5}
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var iarray = [4]interface{}{1, "hello", 2.5, nil}
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var slice = array[:]
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var islice = iarray[:]
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type A struct {
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i int
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j uint
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s string
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x []int
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}
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type I int
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func (i I) String() string { return Sprintf("<%d>", int(i)) }
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type B struct {
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I I
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j int
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}
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type C struct {
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i int
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B
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}
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type F int
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func (f F) Format(s State, c rune) {
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Fprintf(s, "<%c=F(%d)>", c, int(f))
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}
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type G int
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func (g G) GoString() string {
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return Sprintf("GoString(%d)", int(g))
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}
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type S struct {
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F F // a struct field that Formats
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G G // a struct field that GoStrings
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}
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type SI struct {
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I interface{}
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}
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// A type with a String method with pointer receiver for testing %p
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type P int
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var pValue P
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func (p *P) String() string {
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return "String(p)"
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}
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var b byte
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var fmttests = []struct {
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fmt string
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val interface{}
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out string
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}{
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{"%d", 12345, "12345"},
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{"%v", 12345, "12345"},
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{"%t", true, "true"},
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// basic string
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{"%s", "abc", "abc"},
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{"%x", "abc", "616263"},
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{"%x", "xyz", "78797a"},
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{"%X", "xyz", "78797A"},
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{"%q", "abc", `"abc"`},
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// basic bytes
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{"%s", []byte("abc"), "abc"},
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{"%x", []byte("abc"), "616263"},
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{"% x", []byte("abc\xff"), "61 62 63 ff"},
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{"% X", []byte("abc\xff"), "61 62 63 FF"},
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{"%x", []byte("xyz"), "78797a"},
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{"%X", []byte("xyz"), "78797A"},
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{"%q", []byte("abc"), `"abc"`},
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// escaped strings
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{"%#q", `abc`, "`abc`"},
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{"%#q", `"`, "`\"`"},
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{"1 %#q", `\n`, "1 `\\n`"},
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{"2 %#q", "\n", `2 "\n"`},
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{"%q", `"`, `"\""`},
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{"%q", "\a\b\f\r\n\t\v", `"\a\b\f\r\n\t\v"`},
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{"%q", "abc\xffdef", `"abc\xffdef"`},
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{"%q", "\u263a", `"☺"`},
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{"%+q", "\u263a", `"\u263a"`},
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{"%q", "\U0010ffff", `"\U0010ffff"`},
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// escaped characters
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{"%q", 'x', `'x'`},
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{"%q", 0, `'\x00'`},
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{"%q", '\n', `'\n'`},
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{"%q", '\u0e00', `'\u0e00'`}, // not a printable rune.
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{"%q", '\U000c2345', `'\U000c2345'`}, // not a printable rune.
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{"%q", int64(0x7FFFFFFF), `%!q(int64=2147483647)`},
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{"%q", uint64(0xFFFFFFFF), `%!q(uint64=4294967295)`},
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{"%q", '"', `'"'`},
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{"%q", '\'', `'\''`},
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{"%q", "\u263a", `"☺"`},
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{"%+q", "\u263a", `"\u263a"`},
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// width
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{"%5s", "abc", " abc"},
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{"%2s", "\u263a", " ☺"},
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{"%-5s", "abc", "abc "},
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{"%-8q", "abc", `"abc" `},
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{"%05s", "abc", "00abc"},
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{"%08q", "abc", `000"abc"`},
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{"%5s", "abcdefghijklmnopqrstuvwxyz", "abcdefghijklmnopqrstuvwxyz"},
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{"%.5s", "abcdefghijklmnopqrstuvwxyz", "abcde"},
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{"%.5s", "日本語日本語", "日本語日本"},
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{"%.5s", []byte("日本語日本語"), "日本語日本"},
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{"%.5q", "abcdefghijklmnopqrstuvwxyz", `"abcde"`},
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{"%.3q", "日本語日本語", `"日本語"`},
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{"%.3q", []byte("日本語日本語"), `"日本語"`},
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{"%10.1q", "日本語日本語", ` "日"`},
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// integers
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{"%d", 12345, "12345"},
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{"%d", -12345, "-12345"},
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{"%10d", 12345, " 12345"},
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{"%10d", -12345, " -12345"},
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{"%+10d", 12345, " +12345"},
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{"%010d", 12345, "0000012345"},
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{"%010d", -12345, "-000012345"},
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{"%-10d", 12345, "12345 "},
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{"%010.3d", 1, " 001"},
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{"%010.3d", -1, " -001"},
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{"%+d", 12345, "+12345"},
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{"%+d", -12345, "-12345"},
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{"%+d", 0, "+0"},
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{"% d", 0, " 0"},
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{"% d", 12345, " 12345"},
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{"%.0d", 0, ""},
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{"%.d", 0, ""},
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// unicode format
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{"%U", 0x1, "U+0001"},
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{"%U", uint(0x1), "U+0001"},
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{"%.8U", 0x2, "U+00000002"},
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{"%U", 0x1234, "U+1234"},
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{"%U", 0x12345, "U+12345"},
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{"%10.6U", 0xABC, " U+000ABC"},
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{"%-10.6U", 0xABC, "U+000ABC "},
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{"%U", '\n', `U+000A`},
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{"%#U", '\n', `U+000A`},
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{"%U", 'x', `U+0078`},
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{"%#U", 'x', `U+0078 'x'`},
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{"%U", '\u263a', `U+263A`},
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{"%#U", '\u263a', `U+263A '☺'`},
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// floats
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{"%+.3e", 0.0, "+0.000e+00"},
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{"%+.3e", 1.0, "+1.000e+00"},
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{"%+.3f", -1.0, "-1.000"},
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{"% .3E", -1.0, "-1.000E+00"},
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{"% .3e", 1.0, " 1.000e+00"},
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{"%+.3g", 0.0, "+0"},
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{"%+.3g", 1.0, "+1"},
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{"%+.3g", -1.0, "-1"},
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{"% .3g", -1.0, "-1"},
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{"% .3g", 1.0, " 1"},
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// complex values
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{"%+.3e", 0i, "(+0.000e+00+0.000e+00i)"},
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{"%+.3f", 0i, "(+0.000+0.000i)"},
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{"%+.3g", 0i, "(+0+0i)"},
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{"%+.3e", 1 + 2i, "(+1.000e+00+2.000e+00i)"},
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{"%+.3f", 1 + 2i, "(+1.000+2.000i)"},
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{"%+.3g", 1 + 2i, "(+1+2i)"},
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{"%.3e", 0i, "(0.000e+00+0.000e+00i)"},
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{"%.3f", 0i, "(0.000+0.000i)"},
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{"%.3g", 0i, "(0+0i)"},
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{"%.3e", 1 + 2i, "(1.000e+00+2.000e+00i)"},
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{"%.3f", 1 + 2i, "(1.000+2.000i)"},
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{"%.3g", 1 + 2i, "(1+2i)"},
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{"%.3e", -1 - 2i, "(-1.000e+00-2.000e+00i)"},
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{"%.3f", -1 - 2i, "(-1.000-2.000i)"},
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{"%.3g", -1 - 2i, "(-1-2i)"},
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{"% .3E", -1 - 2i, "(-1.000E+00-2.000E+00i)"},
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{"%+.3g", complex64(1 + 2i), "(+1+2i)"},
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{"%+.3g", complex128(1 + 2i), "(+1+2i)"},
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// erroneous formats
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{"", 2, "%!(EXTRA int=2)"},
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{"%d", "hello", "%!d(string=hello)"},
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// old test/fmt_test.go
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{"%d", 1234, "1234"},
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{"%d", -1234, "-1234"},
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{"%d", uint(1234), "1234"},
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{"%d", uint32(b32), "4294967295"},
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{"%d", uint64(b64), "18446744073709551615"},
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{"%o", 01234, "1234"},
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{"%#o", 01234, "01234"},
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{"%o", uint32(b32), "37777777777"},
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{"%o", uint64(b64), "1777777777777777777777"},
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{"%x", 0x1234abcd, "1234abcd"},
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{"%#x", 0x1234abcd, "0x1234abcd"},
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{"%x", b32 - 0x1234567, "fedcba98"},
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{"%X", 0x1234abcd, "1234ABCD"},
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{"%X", b32 - 0x1234567, "FEDCBA98"},
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{"%#X", 0, "0X0"},
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{"%x", b64, "ffffffffffffffff"},
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{"%b", 7, "111"},
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{"%b", b64, "1111111111111111111111111111111111111111111111111111111111111111"},
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{"%b", -6, "-110"},
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{"%e", 1.0, "1.000000e+00"},
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{"%e", 1234.5678e3, "1.234568e+06"},
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{"%e", 1234.5678e-8, "1.234568e-05"},
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{"%e", -7.0, "-7.000000e+00"},
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{"%e", -1e-9, "-1.000000e-09"},
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{"%f", 1234.5678e3, "1234567.800000"},
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{"%f", 1234.5678e-8, "0.000012"},
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{"%f", -7.0, "-7.000000"},
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{"%f", -1e-9, "-0.000000"},
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{"%g", 1234.5678e3, "1.2345678e+06"},
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{"%g", float32(1234.5678e3), "1.2345678e+06"},
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{"%g", 1234.5678e-8, "1.2345678e-05"},
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{"%g", -7.0, "-7"},
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{"%g", -1e-9, "-1e-09"},
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{"%g", float32(-1e-9), "-1e-09"},
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{"%E", 1.0, "1.000000E+00"},
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{"%E", 1234.5678e3, "1.234568E+06"},
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{"%E", 1234.5678e-8, "1.234568E-05"},
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{"%E", -7.0, "-7.000000E+00"},
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{"%E", -1e-9, "-1.000000E-09"},
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{"%G", 1234.5678e3, "1.2345678E+06"},
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{"%G", float32(1234.5678e3), "1.2345678E+06"},
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{"%G", 1234.5678e-8, "1.2345678E-05"},
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{"%G", -7.0, "-7"},
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{"%G", -1e-9, "-1E-09"},
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{"%G", float32(-1e-9), "-1E-09"},
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{"%c", 'x', "x"},
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{"%c", 0xe4, "ä"},
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{"%c", 0x672c, "本"},
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{"%c", 'æ—¥', "æ—¥"},
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{"%20.8d", 1234, " 00001234"},
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{"%20.8d", -1234, " -00001234"},
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{"%20d", 1234, " 1234"},
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{"%-20.8d", 1234, "00001234 "},
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{"%-20.8d", -1234, "-00001234 "},
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{"%-#20.8x", 0x1234abc, "0x01234abc "},
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{"%-#20.8X", 0x1234abc, "0X01234ABC "},
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{"%-#20.8o", 01234, "00001234 "},
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{"%.20b", 7, "00000000000000000111"},
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{"%20.5s", "qwertyuiop", " qwert"},
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{"%.5s", "qwertyuiop", "qwert"},
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| 306 |
|
|
{"%-20.5s", "qwertyuiop", "qwert "},
|
| 307 |
|
|
{"%20c", 'x', " x"},
|
| 308 |
|
|
{"%-20c", 'x', "x "},
|
| 309 |
|
|
{"%20.6e", 1.2345e3, " 1.234500e+03"},
|
| 310 |
|
|
{"%20.6e", 1.2345e-3, " 1.234500e-03"},
|
| 311 |
|
|
{"%20e", 1.2345e3, " 1.234500e+03"},
|
| 312 |
|
|
{"%20e", 1.2345e-3, " 1.234500e-03"},
|
| 313 |
|
|
{"%20.8e", 1.2345e3, " 1.23450000e+03"},
|
| 314 |
|
|
{"%20f", 1.23456789e3, " 1234.567890"},
|
| 315 |
|
|
{"%20f", 1.23456789e-3, " 0.001235"},
|
| 316 |
|
|
{"%20f", 12345678901.23456789, " 12345678901.234568"},
|
| 317 |
|
|
{"%-20f", 1.23456789e3, "1234.567890 "},
|
| 318 |
|
|
{"%20.8f", 1.23456789e3, " 1234.56789000"},
|
| 319 |
|
|
{"%20.8f", 1.23456789e-3, " 0.00123457"},
|
| 320 |
|
|
{"%g", 1.23456789e3, "1234.56789"},
|
| 321 |
|
|
{"%g", 1.23456789e-3, "0.00123456789"},
|
| 322 |
|
|
{"%g", 1.23456789e20, "1.23456789e+20"},
|
| 323 |
|
|
{"%20e", math.Inf(1), " +Inf"},
|
| 324 |
|
|
{"%-20f", math.Inf(-1), "-Inf "},
|
| 325 |
|
|
{"%20g", math.NaN(), " NaN"},
|
| 326 |
|
|
|
| 327 |
|
|
// arrays
|
| 328 |
|
|
{"%v", array, "[1 2 3 4 5]"},
|
| 329 |
|
|
{"%v", iarray, "[1 hello 2.5 ]"},
|
| 330 |
|
|
{"%v", &array, "&[1 2 3 4 5]"},
|
| 331 |
|
|
{"%v", &iarray, "&[1 hello 2.5 ]"},
|
| 332 |
|
|
|
| 333 |
|
|
// slices
|
| 334 |
|
|
{"%v", slice, "[1 2 3 4 5]"},
|
| 335 |
|
|
{"%v", islice, "[1 hello 2.5 ]"},
|
| 336 |
|
|
{"%v", &slice, "&[1 2 3 4 5]"},
|
| 337 |
|
|
{"%v", &islice, "&[1 hello 2.5 ]"},
|
| 338 |
|
|
|
| 339 |
|
|
// complexes with %v
|
| 340 |
|
|
{"%v", 1 + 2i, "(1+2i)"},
|
| 341 |
|
|
{"%v", complex64(1 + 2i), "(1+2i)"},
|
| 342 |
|
|
{"%v", complex128(1 + 2i), "(1+2i)"},
|
| 343 |
|
|
|
| 344 |
|
|
// structs
|
| 345 |
|
|
{"%v", A{1, 2, "a", []int{1, 2}}, `{1 2 a [1 2]}`},
|
| 346 |
|
|
{"%+v", A{1, 2, "a", []int{1, 2}}, `{i:1 j:2 s:a x:[1 2]}`},
|
| 347 |
|
|
|
| 348 |
|
|
// +v on structs with Stringable items
|
| 349 |
|
|
{"%+v", B{1, 2}, `{I:<1> j:2}`},
|
| 350 |
|
|
{"%+v", C{1, B{2, 3}}, `{i:1 B:{I:<2> j:3}}`},
|
| 351 |
|
|
|
| 352 |
|
|
// q on Stringable items
|
| 353 |
|
|
{"%s", I(23), `<23>`},
|
| 354 |
|
|
{"%q", I(23), `"<23>"`},
|
| 355 |
|
|
{"%x", I(23), `3c32333e`},
|
| 356 |
|
|
{"%d", I(23), `23`}, // Stringer applies only to string formats.
|
| 357 |
|
|
|
| 358 |
|
|
// go syntax
|
| 359 |
|
|
{"%#v", A{1, 2, "a", []int{1, 2}}, `fmt_test.A{i:1, j:0x2, s:"a", x:[]int{1, 2}}`},
|
| 360 |
|
|
{"%#v", &b, "(*uint8)(0xPTR)"},
|
| 361 |
|
|
{"%#v", TestFmtInterface, "(func(*testing.T))(0xPTR)"},
|
| 362 |
|
|
{"%#v", make(chan int), "(chan int)(0xPTR)"},
|
| 363 |
|
|
{"%#v", uint64(1<<64 - 1), "0xffffffffffffffff"},
|
| 364 |
|
|
{"%#v", 1000000000, "1000000000"},
|
| 365 |
|
|
{"%#v", map[string]int{"a": 1}, `map[string]int{"a":1}`},
|
| 366 |
|
|
{"%#v", map[string]B{"a": {1, 2}}, `map[string]fmt_test.B{"a":fmt_test.B{I:1, j:2}}`},
|
| 367 |
|
|
{"%#v", []string{"a", "b"}, `[]string{"a", "b"}`},
|
| 368 |
|
|
{"%#v", SI{}, `fmt_test.SI{I:interface {}(nil)}`},
|
| 369 |
|
|
{"%#v", []int(nil), `[]int(nil)`},
|
| 370 |
|
|
{"%#v", []int{}, `[]int{}`},
|
| 371 |
|
|
{"%#v", array, `[5]int{1, 2, 3, 4, 5}`},
|
| 372 |
|
|
{"%#v", &array, `&[5]int{1, 2, 3, 4, 5}`},
|
| 373 |
|
|
{"%#v", iarray, `[4]interface {}{1, "hello", 2.5, interface {}(nil)}`},
|
| 374 |
|
|
{"%#v", &iarray, `&[4]interface {}{1, "hello", 2.5, interface {}(nil)}`},
|
| 375 |
|
|
{"%#v", map[int]byte(nil), `map[int]uint8(nil)`},
|
| 376 |
|
|
{"%#v", map[int]byte{}, `map[int]uint8{}`},
|
| 377 |
|
|
|
| 378 |
|
|
// slices with other formats
|
| 379 |
|
|
{"%#x", []int{1, 2, 15}, `[0x1 0x2 0xf]`},
|
| 380 |
|
|
{"%x", []int{1, 2, 15}, `[1 2 f]`},
|
| 381 |
|
|
{"%d", []int{1, 2, 15}, `[1 2 15]`},
|
| 382 |
|
|
{"%d", []byte{1, 2, 15}, `[1 2 15]`},
|
| 383 |
|
|
{"%q", []string{"a", "b"}, `["a" "b"]`},
|
| 384 |
|
|
|
| 385 |
|
|
// renamings
|
| 386 |
|
|
{"%v", renamedBool(true), "true"},
|
| 387 |
|
|
{"%d", renamedBool(true), "%!d(fmt_test.renamedBool=true)"},
|
| 388 |
|
|
{"%o", renamedInt(8), "10"},
|
| 389 |
|
|
{"%d", renamedInt8(-9), "-9"},
|
| 390 |
|
|
{"%v", renamedInt16(10), "10"},
|
| 391 |
|
|
{"%v", renamedInt32(-11), "-11"},
|
| 392 |
|
|
{"%X", renamedInt64(255), "FF"},
|
| 393 |
|
|
{"%v", renamedUint(13), "13"},
|
| 394 |
|
|
{"%o", renamedUint8(14), "16"},
|
| 395 |
|
|
{"%X", renamedUint16(15), "F"},
|
| 396 |
|
|
{"%d", renamedUint32(16), "16"},
|
| 397 |
|
|
{"%X", renamedUint64(17), "11"},
|
| 398 |
|
|
{"%o", renamedUintptr(18), "22"},
|
| 399 |
|
|
{"%x", renamedString("thing"), "7468696e67"},
|
| 400 |
|
|
{"%d", renamedBytes([]byte{1, 2, 15}), `[1 2 15]`},
|
| 401 |
|
|
{"%q", renamedBytes([]byte("hello")), `"hello"`},
|
| 402 |
|
|
{"%v", renamedFloat32(22), "22"},
|
| 403 |
|
|
{"%v", renamedFloat64(33), "33"},
|
| 404 |
|
|
{"%v", renamedComplex64(3 + 4i), "(3+4i)"},
|
| 405 |
|
|
{"%v", renamedComplex128(4 - 3i), "(4-3i)"},
|
| 406 |
|
|
|
| 407 |
|
|
// Formatter
|
| 408 |
|
|
{"%x", F(1), ""},
|
| 409 |
|
|
{"%x", G(2), "2"},
|
| 410 |
|
|
{"%+v", S{F(4), G(5)}, "{F: G:5}"},
|
| 411 |
|
|
|
| 412 |
|
|
// GoStringer
|
| 413 |
|
|
{"%#v", G(6), "GoString(6)"},
|
| 414 |
|
|
{"%#v", S{F(7), G(8)}, "fmt_test.S{F:, G:GoString(8)}"},
|
| 415 |
|
|
|
| 416 |
|
|
// %T
|
| 417 |
|
|
{"%T", (4 - 3i), "complex128"},
|
| 418 |
|
|
{"%T", renamedComplex128(4 - 3i), "fmt_test.renamedComplex128"},
|
| 419 |
|
|
{"%T", intVal, "int"},
|
| 420 |
|
|
{"%6T", &intVal, " *int"},
|
| 421 |
|
|
|
| 422 |
|
|
// %p
|
| 423 |
|
|
{"p0=%p", new(int), "p0=0xPTR"},
|
| 424 |
|
|
{"p1=%s", &pValue, "p1=String(p)"}, // String method...
|
| 425 |
|
|
{"p2=%p", &pValue, "p2=0xPTR"}, // ... not called with %p
|
| 426 |
|
|
{"p4=%#p", new(int), "p4=PTR"},
|
| 427 |
|
|
|
| 428 |
|
|
// %p on non-pointers
|
| 429 |
|
|
{"%p", make(chan int), "0xPTR"},
|
| 430 |
|
|
{"%p", make(map[int]int), "0xPTR"},
|
| 431 |
|
|
{"%p", make([]int, 1), "0xPTR"},
|
| 432 |
|
|
{"%p", 27, "%!p(int=27)"}, // not a pointer at all
|
| 433 |
|
|
|
| 434 |
|
|
// %d on Stringer should give integer if possible
|
| 435 |
|
|
{"%s", time.Time{}.Month(), "January"},
|
| 436 |
|
|
{"%d", time.Time{}.Month(), "1"},
|
| 437 |
|
|
|
| 438 |
|
|
// erroneous things
|
| 439 |
|
|
{"%s %", "hello", "hello %!(NOVERB)"},
|
| 440 |
|
|
{"%s %.2", "hello", "hello %!(NOVERB)"},
|
| 441 |
|
|
{"%d", "hello", "%!d(string=hello)"},
|
| 442 |
|
|
{"no args", "hello", "no args%!(EXTRA string=hello)"},
|
| 443 |
|
|
{"%s", nil, "%!s()"},
|
| 444 |
|
|
{"%T", nil, ""},
|
| 445 |
|
|
{"%-1", 100, "%!(NOVERB)%!(EXTRA int=100)"},
|
| 446 |
|
|
|
| 447 |
|
|
// The "" show up because maps are printed by
|
| 448 |
|
|
// first obtaining a list of keys and then looking up
|
| 449 |
|
|
// each key. Since NaNs can be map keys but cannot
|
| 450 |
|
|
// be fetched directly, the lookup fails and returns a
|
| 451 |
|
|
// zero reflect.Value, which formats as .
|
| 452 |
|
|
// This test is just to check that it shows the two NaNs at all.
|
| 453 |
|
|
{"%v", map[float64]int{math.NaN(): 1, math.NaN(): 2}, "map[NaN: NaN:]"},
|
| 454 |
|
|
}
|
| 455 |
|
|
|
| 456 |
|
|
func TestSprintf(t *testing.T) {
|
| 457 |
|
|
for _, tt := range fmttests {
|
| 458 |
|
|
s := Sprintf(tt.fmt, tt.val)
|
| 459 |
|
|
if i := strings.Index(tt.out, "PTR"); i >= 0 {
|
| 460 |
|
|
j := i
|
| 461 |
|
|
for ; j < len(s); j++ {
|
| 462 |
|
|
c := s[j]
|
| 463 |
|
|
if (c < '0' || c > '9') && (c < 'a' || c > 'f') && (c < 'A' || c > 'F') {
|
| 464 |
|
|
break
|
| 465 |
|
|
}
|
| 466 |
|
|
}
|
| 467 |
|
|
s = s[0:i] + "PTR" + s[j:]
|
| 468 |
|
|
}
|
| 469 |
|
|
if s != tt.out {
|
| 470 |
|
|
if _, ok := tt.val.(string); ok {
|
| 471 |
|
|
// Don't requote the already-quoted strings.
|
| 472 |
|
|
// It's too confusing to read the errors.
|
| 473 |
|
|
t.Errorf("Sprintf(%q, %q) = <%s> want <%s>", tt.fmt, tt.val, s, tt.out)
|
| 474 |
|
|
} else {
|
| 475 |
|
|
t.Errorf("Sprintf(%q, %v) = %q want %q", tt.fmt, tt.val, s, tt.out)
|
| 476 |
|
|
}
|
| 477 |
|
|
}
|
| 478 |
|
|
}
|
| 479 |
|
|
}
|
| 480 |
|
|
|
| 481 |
|
|
func BenchmarkSprintfEmpty(b *testing.B) {
|
| 482 |
|
|
for i := 0; i < b.N; i++ {
|
| 483 |
|
|
Sprintf("")
|
| 484 |
|
|
}
|
| 485 |
|
|
}
|
| 486 |
|
|
|
| 487 |
|
|
func BenchmarkSprintfString(b *testing.B) {
|
| 488 |
|
|
for i := 0; i < b.N; i++ {
|
| 489 |
|
|
Sprintf("%s", "hello")
|
| 490 |
|
|
}
|
| 491 |
|
|
}
|
| 492 |
|
|
|
| 493 |
|
|
func BenchmarkSprintfInt(b *testing.B) {
|
| 494 |
|
|
for i := 0; i < b.N; i++ {
|
| 495 |
|
|
Sprintf("%d", 5)
|
| 496 |
|
|
}
|
| 497 |
|
|
}
|
| 498 |
|
|
|
| 499 |
|
|
func BenchmarkSprintfIntInt(b *testing.B) {
|
| 500 |
|
|
for i := 0; i < b.N; i++ {
|
| 501 |
|
|
Sprintf("%d %d", 5, 6)
|
| 502 |
|
|
}
|
| 503 |
|
|
}
|
| 504 |
|
|
|
| 505 |
|
|
func BenchmarkSprintfPrefixedInt(b *testing.B) {
|
| 506 |
|
|
for i := 0; i < b.N; i++ {
|
| 507 |
|
|
Sprintf("This is some meaningless prefix text that needs to be scanned %d", 6)
|
| 508 |
|
|
}
|
| 509 |
|
|
}
|
| 510 |
|
|
|
| 511 |
|
|
func BenchmarkSprintfFloat(b *testing.B) {
|
| 512 |
|
|
for i := 0; i < b.N; i++ {
|
| 513 |
|
|
Sprintf("%g", 5.23184)
|
| 514 |
|
|
}
|
| 515 |
|
|
}
|
| 516 |
|
|
|
| 517 |
|
|
var mallocBuf bytes.Buffer
|
| 518 |
|
|
|
| 519 |
|
|
// gccgo numbers are different because gccgo does not have escape
|
| 520 |
|
|
// analysis yet.
|
| 521 |
|
|
var mallocTest = []struct {
|
| 522 |
|
|
count int
|
| 523 |
|
|
desc string
|
| 524 |
|
|
fn func()
|
| 525 |
|
|
}{
|
| 526 |
|
|
{5, `Sprintf("")`, func() { Sprintf("") }},
|
| 527 |
|
|
{5, `Sprintf("xxx")`, func() { Sprintf("xxx") }},
|
| 528 |
|
|
{5, `Sprintf("%x")`, func() { Sprintf("%x", 7) }},
|
| 529 |
|
|
{5, `Sprintf("%s")`, func() { Sprintf("%s", "hello") }},
|
| 530 |
|
|
{5, `Sprintf("%x %x")`, func() { Sprintf("%x %x", 7, 112) }},
|
| 531 |
|
|
// For %g we use a float32, not float64, to guarantee passing the argument
|
| 532 |
|
|
// does not need to allocate memory to store the result in a pointer-sized word.
|
| 533 |
|
|
{20, `Sprintf("%g")`, func() { Sprintf("%g", float32(3.14159)) }},
|
| 534 |
|
|
{5, `Fprintf(buf, "%x %x %x")`, func() { mallocBuf.Reset(); Fprintf(&mallocBuf, "%x %x %x", 7, 8, 9) }},
|
| 535 |
|
|
{5, `Fprintf(buf, "%s")`, func() { mallocBuf.Reset(); Fprintf(&mallocBuf, "%s", "hello") }},
|
| 536 |
|
|
}
|
| 537 |
|
|
|
| 538 |
|
|
var _ bytes.Buffer
|
| 539 |
|
|
|
| 540 |
|
|
func TestCountMallocs(t *testing.T) {
|
| 541 |
|
|
for _, mt := range mallocTest {
|
| 542 |
|
|
const N = 100
|
| 543 |
|
|
memstats := new(runtime.MemStats)
|
| 544 |
|
|
runtime.ReadMemStats(memstats)
|
| 545 |
|
|
mallocs := 0 - memstats.Mallocs
|
| 546 |
|
|
for i := 0; i < N; i++ {
|
| 547 |
|
|
mt.fn()
|
| 548 |
|
|
}
|
| 549 |
|
|
runtime.ReadMemStats(memstats)
|
| 550 |
|
|
mallocs += memstats.Mallocs
|
| 551 |
|
|
if mallocs/N > uint64(mt.count) {
|
| 552 |
|
|
t.Errorf("%s: expected %d mallocs, got %d", mt.desc, mt.count, mallocs/N)
|
| 553 |
|
|
}
|
| 554 |
|
|
}
|
| 555 |
|
|
}
|
| 556 |
|
|
|
| 557 |
|
|
type flagPrinter struct{}
|
| 558 |
|
|
|
| 559 |
|
|
func (*flagPrinter) Format(f State, c rune) {
|
| 560 |
|
|
s := "%"
|
| 561 |
|
|
for i := 0; i < 128; i++ {
|
| 562 |
|
|
if f.Flag(i) {
|
| 563 |
|
|
s += string(i)
|
| 564 |
|
|
}
|
| 565 |
|
|
}
|
| 566 |
|
|
if w, ok := f.Width(); ok {
|
| 567 |
|
|
s += Sprintf("%d", w)
|
| 568 |
|
|
}
|
| 569 |
|
|
if p, ok := f.Precision(); ok {
|
| 570 |
|
|
s += Sprintf(".%d", p)
|
| 571 |
|
|
}
|
| 572 |
|
|
s += string(c)
|
| 573 |
|
|
io.WriteString(f, "["+s+"]")
|
| 574 |
|
|
}
|
| 575 |
|
|
|
| 576 |
|
|
var flagtests = []struct {
|
| 577 |
|
|
in string
|
| 578 |
|
|
out string
|
| 579 |
|
|
}{
|
| 580 |
|
|
{"%a", "[%a]"},
|
| 581 |
|
|
{"%-a", "[%-a]"},
|
| 582 |
|
|
{"%+a", "[%+a]"},
|
| 583 |
|
|
{"%#a", "[%#a]"},
|
| 584 |
|
|
{"% a", "[% a]"},
|
| 585 |
|
|
{"%0a", "[%0a]"},
|
| 586 |
|
|
{"%1.2a", "[%1.2a]"},
|
| 587 |
|
|
{"%-1.2a", "[%-1.2a]"},
|
| 588 |
|
|
{"%+1.2a", "[%+1.2a]"},
|
| 589 |
|
|
{"%-+1.2a", "[%+-1.2a]"},
|
| 590 |
|
|
{"%-+1.2abc", "[%+-1.2a]bc"},
|
| 591 |
|
|
{"%-1.2abc", "[%-1.2a]bc"},
|
| 592 |
|
|
}
|
| 593 |
|
|
|
| 594 |
|
|
func TestFlagParser(t *testing.T) {
|
| 595 |
|
|
var flagprinter flagPrinter
|
| 596 |
|
|
for _, tt := range flagtests {
|
| 597 |
|
|
s := Sprintf(tt.in, &flagprinter)
|
| 598 |
|
|
if s != tt.out {
|
| 599 |
|
|
t.Errorf("Sprintf(%q, &flagprinter) => %q, want %q", tt.in, s, tt.out)
|
| 600 |
|
|
}
|
| 601 |
|
|
}
|
| 602 |
|
|
}
|
| 603 |
|
|
|
| 604 |
|
|
func TestStructPrinter(t *testing.T) {
|
| 605 |
|
|
var s struct {
|
| 606 |
|
|
a string
|
| 607 |
|
|
b string
|
| 608 |
|
|
c int
|
| 609 |
|
|
}
|
| 610 |
|
|
s.a = "abc"
|
| 611 |
|
|
s.b = "def"
|
| 612 |
|
|
s.c = 123
|
| 613 |
|
|
var tests = []struct {
|
| 614 |
|
|
fmt string
|
| 615 |
|
|
out string
|
| 616 |
|
|
}{
|
| 617 |
|
|
{"%v", "{abc def 123}"},
|
| 618 |
|
|
{"%+v", "{a:abc b:def c:123}"},
|
| 619 |
|
|
}
|
| 620 |
|
|
for _, tt := range tests {
|
| 621 |
|
|
out := Sprintf(tt.fmt, s)
|
| 622 |
|
|
if out != tt.out {
|
| 623 |
|
|
t.Errorf("Sprintf(%q, &s) = %q, want %q", tt.fmt, out, tt.out)
|
| 624 |
|
|
}
|
| 625 |
|
|
}
|
| 626 |
|
|
}
|
| 627 |
|
|
|
| 628 |
|
|
// Check map printing using substrings so we don't depend on the print order.
|
| 629 |
|
|
func presentInMap(s string, a []string, t *testing.T) {
|
| 630 |
|
|
for i := 0; i < len(a); i++ {
|
| 631 |
|
|
loc := strings.Index(s, a[i])
|
| 632 |
|
|
if loc < 0 {
|
| 633 |
|
|
t.Errorf("map print: expected to find %q in %q", a[i], s)
|
| 634 |
|
|
}
|
| 635 |
|
|
// make sure the match ends here
|
| 636 |
|
|
loc += len(a[i])
|
| 637 |
|
|
if loc >= len(s) || (s[loc] != ' ' && s[loc] != ']') {
|
| 638 |
|
|
t.Errorf("map print: %q not properly terminated in %q", a[i], s)
|
| 639 |
|
|
}
|
| 640 |
|
|
}
|
| 641 |
|
|
}
|
| 642 |
|
|
|
| 643 |
|
|
func TestMapPrinter(t *testing.T) {
|
| 644 |
|
|
m0 := make(map[int]string)
|
| 645 |
|
|
s := Sprint(m0)
|
| 646 |
|
|
if s != "map[]" {
|
| 647 |
|
|
t.Errorf("empty map printed as %q not %q", s, "map[]")
|
| 648 |
|
|
}
|
| 649 |
|
|
m1 := map[int]string{1: "one", 2: "two", 3: "three"}
|
| 650 |
|
|
a := []string{"1:one", "2:two", "3:three"}
|
| 651 |
|
|
presentInMap(Sprintf("%v", m1), a, t)
|
| 652 |
|
|
presentInMap(Sprint(m1), a, t)
|
| 653 |
|
|
}
|
| 654 |
|
|
|
| 655 |
|
|
func TestEmptyMap(t *testing.T) {
|
| 656 |
|
|
const emptyMapStr = "map[]"
|
| 657 |
|
|
var m map[string]int
|
| 658 |
|
|
s := Sprint(m)
|
| 659 |
|
|
if s != emptyMapStr {
|
| 660 |
|
|
t.Errorf("nil map printed as %q not %q", s, emptyMapStr)
|
| 661 |
|
|
}
|
| 662 |
|
|
m = make(map[string]int)
|
| 663 |
|
|
s = Sprint(m)
|
| 664 |
|
|
if s != emptyMapStr {
|
| 665 |
|
|
t.Errorf("empty map printed as %q not %q", s, emptyMapStr)
|
| 666 |
|
|
}
|
| 667 |
|
|
}
|
| 668 |
|
|
|
| 669 |
|
|
// Check that Sprint (and hence Print, Fprint) puts spaces in the right places,
|
| 670 |
|
|
// that is, between arg pairs in which neither is a string.
|
| 671 |
|
|
func TestBlank(t *testing.T) {
|
| 672 |
|
|
got := Sprint("<", 1, ">:", 1, 2, 3, "!")
|
| 673 |
|
|
expect := "<1>:1 2 3!"
|
| 674 |
|
|
if got != expect {
|
| 675 |
|
|
t.Errorf("got %q expected %q", got, expect)
|
| 676 |
|
|
}
|
| 677 |
|
|
}
|
| 678 |
|
|
|
| 679 |
|
|
// Check that Sprintln (and hence Println, Fprintln) puts spaces in the right places,
|
| 680 |
|
|
// that is, between all arg pairs.
|
| 681 |
|
|
func TestBlankln(t *testing.T) {
|
| 682 |
|
|
got := Sprintln("<", 1, ">:", 1, 2, 3, "!")
|
| 683 |
|
|
expect := "< 1 >: 1 2 3 !\n"
|
| 684 |
|
|
if got != expect {
|
| 685 |
|
|
t.Errorf("got %q expected %q", got, expect)
|
| 686 |
|
|
}
|
| 687 |
|
|
}
|
| 688 |
|
|
|
| 689 |
|
|
// Check Formatter with Sprint, Sprintln, Sprintf
|
| 690 |
|
|
func TestFormatterPrintln(t *testing.T) {
|
| 691 |
|
|
f := F(1)
|
| 692 |
|
|
expect := "\n"
|
| 693 |
|
|
s := Sprint(f, "\n")
|
| 694 |
|
|
if s != expect {
|
| 695 |
|
|
t.Errorf("Sprint wrong with Formatter: expected %q got %q", expect, s)
|
| 696 |
|
|
}
|
| 697 |
|
|
s = Sprintln(f)
|
| 698 |
|
|
if s != expect {
|
| 699 |
|
|
t.Errorf("Sprintln wrong with Formatter: expected %q got %q", expect, s)
|
| 700 |
|
|
}
|
| 701 |
|
|
s = Sprintf("%v\n", f)
|
| 702 |
|
|
if s != expect {
|
| 703 |
|
|
t.Errorf("Sprintf wrong with Formatter: expected %q got %q", expect, s)
|
| 704 |
|
|
}
|
| 705 |
|
|
}
|
| 706 |
|
|
|
| 707 |
|
|
func args(a ...interface{}) []interface{} { return a }
|
| 708 |
|
|
|
| 709 |
|
|
var startests = []struct {
|
| 710 |
|
|
fmt string
|
| 711 |
|
|
in []interface{}
|
| 712 |
|
|
out string
|
| 713 |
|
|
}{
|
| 714 |
|
|
{"%*d", args(4, 42), " 42"},
|
| 715 |
|
|
{"%.*d", args(4, 42), "0042"},
|
| 716 |
|
|
{"%*.*d", args(8, 4, 42), " 0042"},
|
| 717 |
|
|
{"%0*d", args(4, 42), "0042"},
|
| 718 |
|
|
{"%-*d", args(4, 42), "42 "},
|
| 719 |
|
|
|
| 720 |
|
|
// erroneous
|
| 721 |
|
|
{"%*d", args(nil, 42), "%!(BADWIDTH)42"},
|
| 722 |
|
|
{"%.*d", args(nil, 42), "%!(BADPREC)42"},
|
| 723 |
|
|
{"%*d", args(5, "foo"), "%!d(string= foo)"},
|
| 724 |
|
|
{"%*% %d", args(20, 5), "% 5"},
|
| 725 |
|
|
{"%*", args(4), "%!(NOVERB)"},
|
| 726 |
|
|
{"%*d", args(int32(4), 42), "%!(BADWIDTH)42"},
|
| 727 |
|
|
}
|
| 728 |
|
|
|
| 729 |
|
|
func TestWidthAndPrecision(t *testing.T) {
|
| 730 |
|
|
for _, tt := range startests {
|
| 731 |
|
|
s := Sprintf(tt.fmt, tt.in...)
|
| 732 |
|
|
if s != tt.out {
|
| 733 |
|
|
t.Errorf("%q: got %q expected %q", tt.fmt, s, tt.out)
|
| 734 |
|
|
}
|
| 735 |
|
|
}
|
| 736 |
|
|
}
|
| 737 |
|
|
|
| 738 |
|
|
// A type that panics in String.
|
| 739 |
|
|
type Panic struct {
|
| 740 |
|
|
message interface{}
|
| 741 |
|
|
}
|
| 742 |
|
|
|
| 743 |
|
|
// Value receiver.
|
| 744 |
|
|
func (p Panic) GoString() string {
|
| 745 |
|
|
panic(p.message)
|
| 746 |
|
|
}
|
| 747 |
|
|
|
| 748 |
|
|
// Value receiver.
|
| 749 |
|
|
func (p Panic) String() string {
|
| 750 |
|
|
panic(p.message)
|
| 751 |
|
|
}
|
| 752 |
|
|
|
| 753 |
|
|
// A type that panics in Format.
|
| 754 |
|
|
type PanicF struct {
|
| 755 |
|
|
message interface{}
|
| 756 |
|
|
}
|
| 757 |
|
|
|
| 758 |
|
|
// Value receiver.
|
| 759 |
|
|
func (p PanicF) Format(f State, c rune) {
|
| 760 |
|
|
panic(p.message)
|
| 761 |
|
|
}
|
| 762 |
|
|
|
| 763 |
|
|
var panictests = []struct {
|
| 764 |
|
|
fmt string
|
| 765 |
|
|
in interface{}
|
| 766 |
|
|
out string
|
| 767 |
|
|
}{
|
| 768 |
|
|
// String
|
| 769 |
|
|
{"%s", (*Panic)(nil), ""}, // nil pointer special case
|
| 770 |
|
|
{"%s", Panic{io.ErrUnexpectedEOF}, "%s(PANIC=unexpected EOF)"},
|
| 771 |
|
|
{"%s", Panic{3}, "%s(PANIC=3)"},
|
| 772 |
|
|
// GoString
|
| 773 |
|
|
{"%#v", (*Panic)(nil), ""}, // nil pointer special case
|
| 774 |
|
|
{"%#v", Panic{io.ErrUnexpectedEOF}, "%v(PANIC=unexpected EOF)"},
|
| 775 |
|
|
{"%#v", Panic{3}, "%v(PANIC=3)"},
|
| 776 |
|
|
// Format
|
| 777 |
|
|
{"%s", (*PanicF)(nil), ""}, // nil pointer special case
|
| 778 |
|
|
{"%s", PanicF{io.ErrUnexpectedEOF}, "%s(PANIC=unexpected EOF)"},
|
| 779 |
|
|
{"%s", PanicF{3}, "%s(PANIC=3)"},
|
| 780 |
|
|
}
|
| 781 |
|
|
|
| 782 |
|
|
func TestPanics(t *testing.T) {
|
| 783 |
|
|
for _, tt := range panictests {
|
| 784 |
|
|
s := Sprintf(tt.fmt, tt.in)
|
| 785 |
|
|
if s != tt.out {
|
| 786 |
|
|
t.Errorf("%q: got %q expected %q", tt.fmt, s, tt.out)
|
| 787 |
|
|
}
|
| 788 |
|
|
}
|
| 789 |
|
|
}
|
| 790 |
|
|
|
| 791 |
|
|
// Test that erroneous String routine doesn't cause fatal recursion.
|
| 792 |
|
|
var recurCount = 0
|
| 793 |
|
|
|
| 794 |
|
|
type Recur struct {
|
| 795 |
|
|
i int
|
| 796 |
|
|
failed *bool
|
| 797 |
|
|
}
|
| 798 |
|
|
|
| 799 |
|
|
func (r Recur) String() string {
|
| 800 |
|
|
if recurCount++; recurCount > 10 {
|
| 801 |
|
|
*r.failed = true
|
| 802 |
|
|
return "FAIL"
|
| 803 |
|
|
}
|
| 804 |
|
|
// This will call badVerb. Before the fix, that would cause us to recur into
|
| 805 |
|
|
// this routine to print %!p(value). Now we don't call the user's method
|
| 806 |
|
|
// during an error.
|
| 807 |
|
|
return Sprintf("recur@%p value: %d", r, r.i)
|
| 808 |
|
|
}
|
| 809 |
|
|
|
| 810 |
|
|
func TestBadVerbRecursion(t *testing.T) {
|
| 811 |
|
|
failed := false
|
| 812 |
|
|
r := Recur{3, &failed}
|
| 813 |
|
|
Sprintf("recur@%p value: %d\n", &r, r.i)
|
| 814 |
|
|
if failed {
|
| 815 |
|
|
t.Error("fail with pointer")
|
| 816 |
|
|
}
|
| 817 |
|
|
failed = false
|
| 818 |
|
|
r = Recur{4, &failed}
|
| 819 |
|
|
Sprintf("recur@%p, value: %d\n", r, r.i)
|
| 820 |
|
|
if failed {
|
| 821 |
|
|
t.Error("fail with value")
|
| 822 |
|
|
}
|
| 823 |
|
|
}
|
