859 lines
22 KiB
Go
859 lines
22 KiB
Go
// 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 fmt_test
|
|
|
|
import (
|
|
"bytes"
|
|
. "fmt"
|
|
"io"
|
|
"math"
|
|
"runtime" // for the malloc count test only
|
|
"strings"
|
|
"testing"
|
|
"time"
|
|
"unicode"
|
|
)
|
|
|
|
type (
|
|
renamedBool bool
|
|
renamedInt int
|
|
renamedInt8 int8
|
|
renamedInt16 int16
|
|
renamedInt32 int32
|
|
renamedInt64 int64
|
|
renamedUint uint
|
|
renamedUint8 uint8
|
|
renamedUint16 uint16
|
|
renamedUint32 uint32
|
|
renamedUint64 uint64
|
|
renamedUintptr uintptr
|
|
renamedString string
|
|
renamedBytes []byte
|
|
renamedFloat32 float32
|
|
renamedFloat64 float64
|
|
renamedComplex64 complex64
|
|
renamedComplex128 complex128
|
|
)
|
|
|
|
func TestFmtInterface(t *testing.T) {
|
|
var i1 interface{}
|
|
i1 = "abc"
|
|
s := Sprintf("%s", i1)
|
|
if s != "abc" {
|
|
t.Errorf(`Sprintf("%%s", empty("abc")) = %q want %q`, s, "abc")
|
|
}
|
|
}
|
|
|
|
const b32 uint32 = 1<<32 - 1
|
|
const b64 uint64 = 1<<64 - 1
|
|
|
|
var array = [5]int{1, 2, 3, 4, 5}
|
|
var iarray = [4]interface{}{1, "hello", 2.5, nil}
|
|
var slice = array[:]
|
|
var islice = iarray[:]
|
|
|
|
type A struct {
|
|
i int
|
|
j uint
|
|
s string
|
|
x []int
|
|
}
|
|
|
|
type I int
|
|
|
|
func (i I) String() string { return Sprintf("<%d>", int(i)) }
|
|
|
|
type B struct {
|
|
I I
|
|
j int
|
|
}
|
|
|
|
type C struct {
|
|
i int
|
|
B
|
|
}
|
|
|
|
type F int
|
|
|
|
func (f F) Format(s State, c rune) {
|
|
Fprintf(s, "<%c=F(%d)>", c, int(f))
|
|
}
|
|
|
|
type G int
|
|
|
|
func (g G) GoString() string {
|
|
return Sprintf("GoString(%d)", int(g))
|
|
}
|
|
|
|
type S struct {
|
|
F F // a struct field that Formats
|
|
G G // a struct field that GoStrings
|
|
}
|
|
|
|
type SI struct {
|
|
I interface{}
|
|
}
|
|
|
|
// A type with a String method with pointer receiver for testing %p
|
|
type P int
|
|
|
|
var pValue P
|
|
|
|
func (p *P) String() string {
|
|
return "String(p)"
|
|
}
|
|
|
|
var b byte
|
|
|
|
var fmttests = []struct {
|
|
fmt string
|
|
val interface{}
|
|
out string
|
|
}{
|
|
{"%d", 12345, "12345"},
|
|
{"%v", 12345, "12345"},
|
|
{"%t", true, "true"},
|
|
|
|
// basic string
|
|
{"%s", "abc", "abc"},
|
|
{"%x", "abc", "616263"},
|
|
{"%x", "xyz", "78797a"},
|
|
{"%X", "xyz", "78797A"},
|
|
{"%q", "abc", `"abc"`},
|
|
|
|
// basic bytes
|
|
{"%s", []byte("abc"), "abc"},
|
|
{"%x", []byte("abc"), "616263"},
|
|
{"% x", []byte("abc\xff"), "61 62 63 ff"},
|
|
{"% X", []byte("abc\xff"), "61 62 63 FF"},
|
|
{"%x", []byte("xyz"), "78797a"},
|
|
{"%X", []byte("xyz"), "78797A"},
|
|
{"%q", []byte("abc"), `"abc"`},
|
|
|
|
// escaped strings
|
|
{"%#q", `abc`, "`abc`"},
|
|
{"%#q", `"`, "`\"`"},
|
|
{"1 %#q", `\n`, "1 `\\n`"},
|
|
{"2 %#q", "\n", `2 "\n"`},
|
|
{"%q", `"`, `"\""`},
|
|
{"%q", "\a\b\f\r\n\t\v", `"\a\b\f\r\n\t\v"`},
|
|
{"%q", "abc\xffdef", `"abc\xffdef"`},
|
|
{"%q", "\u263a", `"☺"`},
|
|
{"%+q", "\u263a", `"\u263a"`},
|
|
{"%q", "\U0010ffff", `"\U0010ffff"`},
|
|
|
|
// escaped characters
|
|
{"%q", 'x', `'x'`},
|
|
{"%q", 0, `'\x00'`},
|
|
{"%q", '\n', `'\n'`},
|
|
{"%q", '\u0e00', `'\u0e00'`}, // not a printable rune.
|
|
{"%q", '\U000c2345', `'\U000c2345'`}, // not a printable rune.
|
|
{"%q", int64(0x7FFFFFFF), `%!q(int64=2147483647)`},
|
|
{"%q", uint64(0xFFFFFFFF), `%!q(uint64=4294967295)`},
|
|
{"%q", '"', `'"'`},
|
|
{"%q", '\'', `'\''`},
|
|
{"%q", "\u263a", `"☺"`},
|
|
{"%+q", "\u263a", `"\u263a"`},
|
|
|
|
// width
|
|
{"%5s", "abc", " abc"},
|
|
{"%2s", "\u263a", " ☺"},
|
|
{"%-5s", "abc", "abc "},
|
|
{"%-8q", "abc", `"abc" `},
|
|
{"%05s", "abc", "00abc"},
|
|
{"%08q", "abc", `000"abc"`},
|
|
{"%5s", "abcdefghijklmnopqrstuvwxyz", "abcdefghijklmnopqrstuvwxyz"},
|
|
{"%.5s", "abcdefghijklmnopqrstuvwxyz", "abcde"},
|
|
{"%.5s", "日本語日本語", "日本語日本"},
|
|
{"%.5s", []byte("日本語日本語"), "日本語日本"},
|
|
{"%.5q", "abcdefghijklmnopqrstuvwxyz", `"abcde"`},
|
|
{"%.3q", "日本語日本語", `"日本語"`},
|
|
{"%.3q", []byte("日本語日本語"), `"日本語"`},
|
|
{"%10.1q", "日本語日本語", ` "日"`},
|
|
|
|
// integers
|
|
{"%d", 12345, "12345"},
|
|
{"%d", -12345, "-12345"},
|
|
{"%10d", 12345, " 12345"},
|
|
{"%10d", -12345, " -12345"},
|
|
{"%+10d", 12345, " +12345"},
|
|
{"%010d", 12345, "0000012345"},
|
|
{"%010d", -12345, "-000012345"},
|
|
{"%-10d", 12345, "12345 "},
|
|
{"%010.3d", 1, " 001"},
|
|
{"%010.3d", -1, " -001"},
|
|
{"%+d", 12345, "+12345"},
|
|
{"%+d", -12345, "-12345"},
|
|
{"%+d", 0, "+0"},
|
|
{"% d", 0, " 0"},
|
|
{"% d", 12345, " 12345"},
|
|
{"%.0d", 0, ""},
|
|
{"%.d", 0, ""},
|
|
|
|
// unicode format
|
|
{"%U", 0x1, "U+0001"},
|
|
{"%U", uint(0x1), "U+0001"},
|
|
{"%.8U", 0x2, "U+00000002"},
|
|
{"%U", 0x1234, "U+1234"},
|
|
{"%U", 0x12345, "U+12345"},
|
|
{"%10.6U", 0xABC, " U+000ABC"},
|
|
{"%-10.6U", 0xABC, "U+000ABC "},
|
|
{"%U", '\n', `U+000A`},
|
|
{"%#U", '\n', `U+000A`},
|
|
{"%U", 'x', `U+0078`},
|
|
{"%#U", 'x', `U+0078 'x'`},
|
|
{"%U", '\u263a', `U+263A`},
|
|
{"%#U", '\u263a', `U+263A '☺'`},
|
|
|
|
// floats
|
|
{"%+.3e", 0.0, "+0.000e+00"},
|
|
{"%+.3e", 1.0, "+1.000e+00"},
|
|
{"%+.3f", -1.0, "-1.000"},
|
|
{"% .3E", -1.0, "-1.000E+00"},
|
|
{"% .3e", 1.0, " 1.000e+00"},
|
|
{"%+.3g", 0.0, "+0"},
|
|
{"%+.3g", 1.0, "+1"},
|
|
{"%+.3g", -1.0, "-1"},
|
|
{"% .3g", -1.0, "-1"},
|
|
{"% .3g", 1.0, " 1"},
|
|
|
|
// complex values
|
|
{"%+.3e", 0i, "(+0.000e+00+0.000e+00i)"},
|
|
{"%+.3f", 0i, "(+0.000+0.000i)"},
|
|
{"%+.3g", 0i, "(+0+0i)"},
|
|
{"%+.3e", 1 + 2i, "(+1.000e+00+2.000e+00i)"},
|
|
{"%+.3f", 1 + 2i, "(+1.000+2.000i)"},
|
|
{"%+.3g", 1 + 2i, "(+1+2i)"},
|
|
{"%.3e", 0i, "(0.000e+00+0.000e+00i)"},
|
|
{"%.3f", 0i, "(0.000+0.000i)"},
|
|
{"%.3g", 0i, "(0+0i)"},
|
|
{"%.3e", 1 + 2i, "(1.000e+00+2.000e+00i)"},
|
|
{"%.3f", 1 + 2i, "(1.000+2.000i)"},
|
|
{"%.3g", 1 + 2i, "(1+2i)"},
|
|
{"%.3e", -1 - 2i, "(-1.000e+00-2.000e+00i)"},
|
|
{"%.3f", -1 - 2i, "(-1.000-2.000i)"},
|
|
{"%.3g", -1 - 2i, "(-1-2i)"},
|
|
{"% .3E", -1 - 2i, "(-1.000E+00-2.000E+00i)"},
|
|
{"%+.3g", complex64(1 + 2i), "(+1+2i)"},
|
|
{"%+.3g", complex128(1 + 2i), "(+1+2i)"},
|
|
|
|
// erroneous formats
|
|
{"", 2, "%!(EXTRA int=2)"},
|
|
{"%d", "hello", "%!d(string=hello)"},
|
|
|
|
// old test/fmt_test.go
|
|
{"%d", 1234, "1234"},
|
|
{"%d", -1234, "-1234"},
|
|
{"%d", uint(1234), "1234"},
|
|
{"%d", uint32(b32), "4294967295"},
|
|
{"%d", uint64(b64), "18446744073709551615"},
|
|
{"%o", 01234, "1234"},
|
|
{"%#o", 01234, "01234"},
|
|
{"%o", uint32(b32), "37777777777"},
|
|
{"%o", uint64(b64), "1777777777777777777777"},
|
|
{"%x", 0x1234abcd, "1234abcd"},
|
|
{"%#x", 0x1234abcd, "0x1234abcd"},
|
|
{"%x", b32 - 0x1234567, "fedcba98"},
|
|
{"%X", 0x1234abcd, "1234ABCD"},
|
|
{"%X", b32 - 0x1234567, "FEDCBA98"},
|
|
{"%#X", 0, "0X0"},
|
|
{"%x", b64, "ffffffffffffffff"},
|
|
{"%b", 7, "111"},
|
|
{"%b", b64, "1111111111111111111111111111111111111111111111111111111111111111"},
|
|
{"%b", -6, "-110"},
|
|
{"%e", 1.0, "1.000000e+00"},
|
|
{"%e", 1234.5678e3, "1.234568e+06"},
|
|
{"%e", 1234.5678e-8, "1.234568e-05"},
|
|
{"%e", -7.0, "-7.000000e+00"},
|
|
{"%e", -1e-9, "-1.000000e-09"},
|
|
{"%f", 1234.5678e3, "1234567.800000"},
|
|
{"%f", 1234.5678e-8, "0.000012"},
|
|
{"%f", -7.0, "-7.000000"},
|
|
{"%f", -1e-9, "-0.000000"},
|
|
{"%g", 1234.5678e3, "1.2345678e+06"},
|
|
{"%g", float32(1234.5678e3), "1.2345678e+06"},
|
|
{"%g", 1234.5678e-8, "1.2345678e-05"},
|
|
{"%g", -7.0, "-7"},
|
|
{"%g", -1e-9, "-1e-09"},
|
|
{"%g", float32(-1e-9), "-1e-09"},
|
|
{"%E", 1.0, "1.000000E+00"},
|
|
{"%E", 1234.5678e3, "1.234568E+06"},
|
|
{"%E", 1234.5678e-8, "1.234568E-05"},
|
|
{"%E", -7.0, "-7.000000E+00"},
|
|
{"%E", -1e-9, "-1.000000E-09"},
|
|
{"%G", 1234.5678e3, "1.2345678E+06"},
|
|
{"%G", float32(1234.5678e3), "1.2345678E+06"},
|
|
{"%G", 1234.5678e-8, "1.2345678E-05"},
|
|
{"%G", -7.0, "-7"},
|
|
{"%G", -1e-9, "-1E-09"},
|
|
{"%G", float32(-1e-9), "-1E-09"},
|
|
{"%c", 'x', "x"},
|
|
{"%c", 0xe4, "ä"},
|
|
{"%c", 0x672c, "本"},
|
|
{"%c", '日', "日"},
|
|
{"%20.8d", 1234, " 00001234"},
|
|
{"%20.8d", -1234, " -00001234"},
|
|
{"%20d", 1234, " 1234"},
|
|
{"%-20.8d", 1234, "00001234 "},
|
|
{"%-20.8d", -1234, "-00001234 "},
|
|
{"%-#20.8x", 0x1234abc, "0x01234abc "},
|
|
{"%-#20.8X", 0x1234abc, "0X01234ABC "},
|
|
{"%-#20.8o", 01234, "00001234 "},
|
|
{"%.20b", 7, "00000000000000000111"},
|
|
{"%20.5s", "qwertyuiop", " qwert"},
|
|
{"%.5s", "qwertyuiop", "qwert"},
|
|
{"%-20.5s", "qwertyuiop", "qwert "},
|
|
{"%20c", 'x', " x"},
|
|
{"%-20c", 'x', "x "},
|
|
{"%20.6e", 1.2345e3, " 1.234500e+03"},
|
|
{"%20.6e", 1.2345e-3, " 1.234500e-03"},
|
|
{"%20e", 1.2345e3, " 1.234500e+03"},
|
|
{"%20e", 1.2345e-3, " 1.234500e-03"},
|
|
{"%20.8e", 1.2345e3, " 1.23450000e+03"},
|
|
{"%20f", 1.23456789e3, " 1234.567890"},
|
|
{"%20f", 1.23456789e-3, " 0.001235"},
|
|
{"%20f", 12345678901.23456789, " 12345678901.234568"},
|
|
{"%-20f", 1.23456789e3, "1234.567890 "},
|
|
{"%20.8f", 1.23456789e3, " 1234.56789000"},
|
|
{"%20.8f", 1.23456789e-3, " 0.00123457"},
|
|
{"%g", 1.23456789e3, "1234.56789"},
|
|
{"%g", 1.23456789e-3, "0.00123456789"},
|
|
{"%g", 1.23456789e20, "1.23456789e+20"},
|
|
{"%20e", math.Inf(1), " +Inf"},
|
|
{"%-20f", math.Inf(-1), "-Inf "},
|
|
{"%20g", math.NaN(), " NaN"},
|
|
|
|
// arrays
|
|
{"%v", array, "[1 2 3 4 5]"},
|
|
{"%v", iarray, "[1 hello 2.5 <nil>]"},
|
|
{"%v", &array, "&[1 2 3 4 5]"},
|
|
{"%v", &iarray, "&[1 hello 2.5 <nil>]"},
|
|
|
|
// slices
|
|
{"%v", slice, "[1 2 3 4 5]"},
|
|
{"%v", islice, "[1 hello 2.5 <nil>]"},
|
|
{"%v", &slice, "&[1 2 3 4 5]"},
|
|
{"%v", &islice, "&[1 hello 2.5 <nil>]"},
|
|
|
|
// complexes with %v
|
|
{"%v", 1 + 2i, "(1+2i)"},
|
|
{"%v", complex64(1 + 2i), "(1+2i)"},
|
|
{"%v", complex128(1 + 2i), "(1+2i)"},
|
|
|
|
// structs
|
|
{"%v", A{1, 2, "a", []int{1, 2}}, `{1 2 a [1 2]}`},
|
|
{"%+v", A{1, 2, "a", []int{1, 2}}, `{i:1 j:2 s:a x:[1 2]}`},
|
|
|
|
// +v on structs with Stringable items
|
|
{"%+v", B{1, 2}, `{I:<1> j:2}`},
|
|
{"%+v", C{1, B{2, 3}}, `{i:1 B:{I:<2> j:3}}`},
|
|
|
|
// q on Stringable items
|
|
{"%s", I(23), `<23>`},
|
|
{"%q", I(23), `"<23>"`},
|
|
{"%x", I(23), `3c32333e`},
|
|
{"%d", I(23), `23`}, // Stringer applies only to string formats.
|
|
|
|
// go syntax
|
|
{"%#v", A{1, 2, "a", []int{1, 2}}, `fmt_test.A{i:1, j:0x2, s:"a", x:[]int{1, 2}}`},
|
|
{"%#v", &b, "(*uint8)(0xPTR)"},
|
|
{"%#v", TestFmtInterface, "(func(*testing.T))(0xPTR)"},
|
|
{"%#v", make(chan int), "(chan int)(0xPTR)"},
|
|
{"%#v", uint64(1<<64 - 1), "0xffffffffffffffff"},
|
|
{"%#v", 1000000000, "1000000000"},
|
|
{"%#v", map[string]int{"a": 1}, `map[string]int{"a":1}`},
|
|
{"%#v", map[string]B{"a": {1, 2}}, `map[string]fmt_test.B{"a":fmt_test.B{I:1, j:2}}`},
|
|
{"%#v", []string{"a", "b"}, `[]string{"a", "b"}`},
|
|
{"%#v", SI{}, `fmt_test.SI{I:interface {}(nil)}`},
|
|
{"%#v", []int(nil), `[]int(nil)`},
|
|
{"%#v", []int{}, `[]int{}`},
|
|
{"%#v", array, `[5]int{1, 2, 3, 4, 5}`},
|
|
{"%#v", &array, `&[5]int{1, 2, 3, 4, 5}`},
|
|
{"%#v", iarray, `[4]interface {}{1, "hello", 2.5, interface {}(nil)}`},
|
|
{"%#v", &iarray, `&[4]interface {}{1, "hello", 2.5, interface {}(nil)}`},
|
|
{"%#v", map[int]byte(nil), `map[int]uint8(nil)`},
|
|
{"%#v", map[int]byte{}, `map[int]uint8{}`},
|
|
|
|
// slices with other formats
|
|
{"%#x", []int{1, 2, 15}, `[0x1 0x2 0xf]`},
|
|
{"%x", []int{1, 2, 15}, `[1 2 f]`},
|
|
{"%d", []int{1, 2, 15}, `[1 2 15]`},
|
|
{"%d", []byte{1, 2, 15}, `[1 2 15]`},
|
|
{"%q", []string{"a", "b"}, `["a" "b"]`},
|
|
|
|
// renamings
|
|
{"%v", renamedBool(true), "true"},
|
|
{"%d", renamedBool(true), "%!d(fmt_test.renamedBool=true)"},
|
|
{"%o", renamedInt(8), "10"},
|
|
{"%d", renamedInt8(-9), "-9"},
|
|
{"%v", renamedInt16(10), "10"},
|
|
{"%v", renamedInt32(-11), "-11"},
|
|
{"%X", renamedInt64(255), "FF"},
|
|
{"%v", renamedUint(13), "13"},
|
|
{"%o", renamedUint8(14), "16"},
|
|
{"%X", renamedUint16(15), "F"},
|
|
{"%d", renamedUint32(16), "16"},
|
|
{"%X", renamedUint64(17), "11"},
|
|
{"%o", renamedUintptr(18), "22"},
|
|
{"%x", renamedString("thing"), "7468696e67"},
|
|
{"%d", renamedBytes([]byte{1, 2, 15}), `[1 2 15]`},
|
|
{"%q", renamedBytes([]byte("hello")), `"hello"`},
|
|
{"%v", renamedFloat32(22), "22"},
|
|
{"%v", renamedFloat64(33), "33"},
|
|
{"%v", renamedComplex64(3 + 4i), "(3+4i)"},
|
|
{"%v", renamedComplex128(4 - 3i), "(4-3i)"},
|
|
|
|
// Formatter
|
|
{"%x", F(1), "<x=F(1)>"},
|
|
{"%x", G(2), "2"},
|
|
{"%+v", S{F(4), G(5)}, "{F:<v=F(4)> G:5}"},
|
|
|
|
// GoStringer
|
|
{"%#v", G(6), "GoString(6)"},
|
|
{"%#v", S{F(7), G(8)}, "fmt_test.S{F:<v=F(7)>, G:GoString(8)}"},
|
|
|
|
// %T
|
|
{"%T", (4 - 3i), "complex128"},
|
|
{"%T", renamedComplex128(4 - 3i), "fmt_test.renamedComplex128"},
|
|
{"%T", intVal, "int"},
|
|
{"%6T", &intVal, " *int"},
|
|
|
|
// %p
|
|
{"p0=%p", new(int), "p0=0xPTR"},
|
|
{"p1=%s", &pValue, "p1=String(p)"}, // String method...
|
|
{"p2=%p", &pValue, "p2=0xPTR"}, // ... not called with %p
|
|
{"p3=%p", (*int)(nil), "p3=0x0"},
|
|
{"p4=%#p", new(int), "p4=PTR"},
|
|
|
|
// %p on non-pointers
|
|
{"%p", make(chan int), "0xPTR"},
|
|
{"%p", make(map[int]int), "0xPTR"},
|
|
{"%p", make([]int, 1), "0xPTR"},
|
|
{"%p", 27, "%!p(int=27)"}, // not a pointer at all
|
|
|
|
// %q on pointers
|
|
{"%q", (*int)(nil), "%!q(*int=<nil>)"},
|
|
{"%q", new(int), "%!q(*int=0xPTR)"},
|
|
|
|
// %v on pointers formats 0 as <nil>
|
|
{"%v", (*int)(nil), "<nil>"},
|
|
{"%v", new(int), "0xPTR"},
|
|
|
|
// %d on Stringer should give integer if possible
|
|
{"%s", time.Time{}.Month(), "January"},
|
|
{"%d", time.Time{}.Month(), "1"},
|
|
|
|
// erroneous things
|
|
{"%s %", "hello", "hello %!(NOVERB)"},
|
|
{"%s %.2", "hello", "hello %!(NOVERB)"},
|
|
{"%d", "hello", "%!d(string=hello)"},
|
|
{"no args", "hello", "no args%!(EXTRA string=hello)"},
|
|
{"%s", nil, "%!s(<nil>)"},
|
|
{"%T", nil, "<nil>"},
|
|
{"%-1", 100, "%!(NOVERB)%!(EXTRA int=100)"},
|
|
|
|
// The "<nil>" show up because maps are printed by
|
|
// first obtaining a list of keys and then looking up
|
|
// each key. Since NaNs can be map keys but cannot
|
|
// be fetched directly, the lookup fails and returns a
|
|
// zero reflect.Value, which formats as <nil>.
|
|
// This test is just to check that it shows the two NaNs at all.
|
|
{"%v", map[float64]int{math.NaN(): 1, math.NaN(): 2}, "map[NaN:<nil> NaN:<nil>]"},
|
|
|
|
// Used to crash because nByte didn't allow for a sign.
|
|
{"%b", int64(-1 << 63), "-1000000000000000000000000000000000000000000000000000000000000000"},
|
|
}
|
|
|
|
func TestSprintf(t *testing.T) {
|
|
for _, tt := range fmttests {
|
|
s := Sprintf(tt.fmt, tt.val)
|
|
if i := strings.Index(tt.out, "PTR"); i >= 0 {
|
|
j := i
|
|
for ; j < len(s); j++ {
|
|
c := s[j]
|
|
if (c < '0' || c > '9') && (c < 'a' || c > 'f') && (c < 'A' || c > 'F') {
|
|
break
|
|
}
|
|
}
|
|
s = s[0:i] + "PTR" + s[j:]
|
|
}
|
|
if s != tt.out {
|
|
if _, ok := tt.val.(string); ok {
|
|
// Don't requote the already-quoted strings.
|
|
// It's too confusing to read the errors.
|
|
t.Errorf("Sprintf(%q, %q) = <%s> want <%s>", tt.fmt, tt.val, s, tt.out)
|
|
} else {
|
|
t.Errorf("Sprintf(%q, %v) = %q want %q", tt.fmt, tt.val, s, tt.out)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func BenchmarkSprintfEmpty(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
Sprintf("")
|
|
}
|
|
}
|
|
|
|
func BenchmarkSprintfString(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
Sprintf("%s", "hello")
|
|
}
|
|
}
|
|
|
|
func BenchmarkSprintfInt(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
Sprintf("%d", 5)
|
|
}
|
|
}
|
|
|
|
func BenchmarkSprintfIntInt(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
Sprintf("%d %d", 5, 6)
|
|
}
|
|
}
|
|
|
|
func BenchmarkSprintfPrefixedInt(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
Sprintf("This is some meaningless prefix text that needs to be scanned %d", 6)
|
|
}
|
|
}
|
|
|
|
func BenchmarkSprintfFloat(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
Sprintf("%g", 5.23184)
|
|
}
|
|
}
|
|
|
|
var mallocBuf bytes.Buffer
|
|
|
|
// gccgo numbers are different because gccgo does not have escape
|
|
// analysis yet.
|
|
var mallocTest = []struct {
|
|
count int
|
|
desc string
|
|
fn func()
|
|
}{
|
|
{5, `Sprintf("")`, func() { Sprintf("") }},
|
|
{5, `Sprintf("xxx")`, func() { Sprintf("xxx") }},
|
|
{5, `Sprintf("%x")`, func() { Sprintf("%x", 7) }},
|
|
{5, `Sprintf("%s")`, func() { Sprintf("%s", "hello") }},
|
|
{5, `Sprintf("%x %x")`, func() { Sprintf("%x %x", 7, 112) }},
|
|
// For %g we use a float32, not float64, to guarantee passing the argument
|
|
// does not need to allocate memory to store the result in a pointer-sized word.
|
|
{20, `Sprintf("%g")`, func() { Sprintf("%g", float32(3.14159)) }},
|
|
{5, `Fprintf(buf, "%x %x %x")`, func() { mallocBuf.Reset(); Fprintf(&mallocBuf, "%x %x %x", 7, 8, 9) }},
|
|
{5, `Fprintf(buf, "%s")`, func() { mallocBuf.Reset(); Fprintf(&mallocBuf, "%s", "hello") }},
|
|
}
|
|
|
|
var _ bytes.Buffer
|
|
|
|
func TestCountMallocs(t *testing.T) {
|
|
for _, mt := range mallocTest {
|
|
const N = 100
|
|
memstats := new(runtime.MemStats)
|
|
runtime.ReadMemStats(memstats)
|
|
mallocs := 0 - memstats.Mallocs
|
|
for i := 0; i < N; i++ {
|
|
mt.fn()
|
|
}
|
|
runtime.ReadMemStats(memstats)
|
|
mallocs += memstats.Mallocs
|
|
if mallocs/N > uint64(mt.count) {
|
|
t.Errorf("%s: expected %d mallocs, got %d", mt.desc, mt.count, mallocs/N)
|
|
}
|
|
}
|
|
}
|
|
|
|
type flagPrinter struct{}
|
|
|
|
func (*flagPrinter) Format(f State, c rune) {
|
|
s := "%"
|
|
for i := 0; i < 128; i++ {
|
|
if f.Flag(i) {
|
|
s += string(i)
|
|
}
|
|
}
|
|
if w, ok := f.Width(); ok {
|
|
s += Sprintf("%d", w)
|
|
}
|
|
if p, ok := f.Precision(); ok {
|
|
s += Sprintf(".%d", p)
|
|
}
|
|
s += string(c)
|
|
io.WriteString(f, "["+s+"]")
|
|
}
|
|
|
|
var flagtests = []struct {
|
|
in string
|
|
out string
|
|
}{
|
|
{"%a", "[%a]"},
|
|
{"%-a", "[%-a]"},
|
|
{"%+a", "[%+a]"},
|
|
{"%#a", "[%#a]"},
|
|
{"% a", "[% a]"},
|
|
{"%0a", "[%0a]"},
|
|
{"%1.2a", "[%1.2a]"},
|
|
{"%-1.2a", "[%-1.2a]"},
|
|
{"%+1.2a", "[%+1.2a]"},
|
|
{"%-+1.2a", "[%+-1.2a]"},
|
|
{"%-+1.2abc", "[%+-1.2a]bc"},
|
|
{"%-1.2abc", "[%-1.2a]bc"},
|
|
}
|
|
|
|
func TestFlagParser(t *testing.T) {
|
|
var flagprinter flagPrinter
|
|
for _, tt := range flagtests {
|
|
s := Sprintf(tt.in, &flagprinter)
|
|
if s != tt.out {
|
|
t.Errorf("Sprintf(%q, &flagprinter) => %q, want %q", tt.in, s, tt.out)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestStructPrinter(t *testing.T) {
|
|
var s struct {
|
|
a string
|
|
b string
|
|
c int
|
|
}
|
|
s.a = "abc"
|
|
s.b = "def"
|
|
s.c = 123
|
|
var tests = []struct {
|
|
fmt string
|
|
out string
|
|
}{
|
|
{"%v", "{abc def 123}"},
|
|
{"%+v", "{a:abc b:def c:123}"},
|
|
}
|
|
for _, tt := range tests {
|
|
out := Sprintf(tt.fmt, s)
|
|
if out != tt.out {
|
|
t.Errorf("Sprintf(%q, &s) = %q, want %q", tt.fmt, out, tt.out)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check map printing using substrings so we don't depend on the print order.
|
|
func presentInMap(s string, a []string, t *testing.T) {
|
|
for i := 0; i < len(a); i++ {
|
|
loc := strings.Index(s, a[i])
|
|
if loc < 0 {
|
|
t.Errorf("map print: expected to find %q in %q", a[i], s)
|
|
}
|
|
// make sure the match ends here
|
|
loc += len(a[i])
|
|
if loc >= len(s) || (s[loc] != ' ' && s[loc] != ']') {
|
|
t.Errorf("map print: %q not properly terminated in %q", a[i], s)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestMapPrinter(t *testing.T) {
|
|
m0 := make(map[int]string)
|
|
s := Sprint(m0)
|
|
if s != "map[]" {
|
|
t.Errorf("empty map printed as %q not %q", s, "map[]")
|
|
}
|
|
m1 := map[int]string{1: "one", 2: "two", 3: "three"}
|
|
a := []string{"1:one", "2:two", "3:three"}
|
|
presentInMap(Sprintf("%v", m1), a, t)
|
|
presentInMap(Sprint(m1), a, t)
|
|
}
|
|
|
|
func TestEmptyMap(t *testing.T) {
|
|
const emptyMapStr = "map[]"
|
|
var m map[string]int
|
|
s := Sprint(m)
|
|
if s != emptyMapStr {
|
|
t.Errorf("nil map printed as %q not %q", s, emptyMapStr)
|
|
}
|
|
m = make(map[string]int)
|
|
s = Sprint(m)
|
|
if s != emptyMapStr {
|
|
t.Errorf("empty map printed as %q not %q", s, emptyMapStr)
|
|
}
|
|
}
|
|
|
|
// Check that Sprint (and hence Print, Fprint) puts spaces in the right places,
|
|
// that is, between arg pairs in which neither is a string.
|
|
func TestBlank(t *testing.T) {
|
|
got := Sprint("<", 1, ">:", 1, 2, 3, "!")
|
|
expect := "<1>:1 2 3!"
|
|
if got != expect {
|
|
t.Errorf("got %q expected %q", got, expect)
|
|
}
|
|
}
|
|
|
|
// Check that Sprintln (and hence Println, Fprintln) puts spaces in the right places,
|
|
// that is, between all arg pairs.
|
|
func TestBlankln(t *testing.T) {
|
|
got := Sprintln("<", 1, ">:", 1, 2, 3, "!")
|
|
expect := "< 1 >: 1 2 3 !\n"
|
|
if got != expect {
|
|
t.Errorf("got %q expected %q", got, expect)
|
|
}
|
|
}
|
|
|
|
// Check Formatter with Sprint, Sprintln, Sprintf
|
|
func TestFormatterPrintln(t *testing.T) {
|
|
f := F(1)
|
|
expect := "<v=F(1)>\n"
|
|
s := Sprint(f, "\n")
|
|
if s != expect {
|
|
t.Errorf("Sprint wrong with Formatter: expected %q got %q", expect, s)
|
|
}
|
|
s = Sprintln(f)
|
|
if s != expect {
|
|
t.Errorf("Sprintln wrong with Formatter: expected %q got %q", expect, s)
|
|
}
|
|
s = Sprintf("%v\n", f)
|
|
if s != expect {
|
|
t.Errorf("Sprintf wrong with Formatter: expected %q got %q", expect, s)
|
|
}
|
|
}
|
|
|
|
func args(a ...interface{}) []interface{} { return a }
|
|
|
|
var startests = []struct {
|
|
fmt string
|
|
in []interface{}
|
|
out string
|
|
}{
|
|
{"%*d", args(4, 42), " 42"},
|
|
{"%.*d", args(4, 42), "0042"},
|
|
{"%*.*d", args(8, 4, 42), " 0042"},
|
|
{"%0*d", args(4, 42), "0042"},
|
|
{"%-*d", args(4, 42), "42 "},
|
|
|
|
// erroneous
|
|
{"%*d", args(nil, 42), "%!(BADWIDTH)42"},
|
|
{"%.*d", args(nil, 42), "%!(BADPREC)42"},
|
|
{"%*d", args(5, "foo"), "%!d(string= foo)"},
|
|
{"%*% %d", args(20, 5), "% 5"},
|
|
{"%*", args(4), "%!(NOVERB)"},
|
|
{"%*d", args(int32(4), 42), "%!(BADWIDTH)42"},
|
|
}
|
|
|
|
func TestWidthAndPrecision(t *testing.T) {
|
|
for _, tt := range startests {
|
|
s := Sprintf(tt.fmt, tt.in...)
|
|
if s != tt.out {
|
|
t.Errorf("%q: got %q expected %q", tt.fmt, s, tt.out)
|
|
}
|
|
}
|
|
}
|
|
|
|
// A type that panics in String.
|
|
type Panic struct {
|
|
message interface{}
|
|
}
|
|
|
|
// Value receiver.
|
|
func (p Panic) GoString() string {
|
|
panic(p.message)
|
|
}
|
|
|
|
// Value receiver.
|
|
func (p Panic) String() string {
|
|
panic(p.message)
|
|
}
|
|
|
|
// A type that panics in Format.
|
|
type PanicF struct {
|
|
message interface{}
|
|
}
|
|
|
|
// Value receiver.
|
|
func (p PanicF) Format(f State, c rune) {
|
|
panic(p.message)
|
|
}
|
|
|
|
var panictests = []struct {
|
|
fmt string
|
|
in interface{}
|
|
out string
|
|
}{
|
|
// String
|
|
{"%s", (*Panic)(nil), "<nil>"}, // nil pointer special case
|
|
{"%s", Panic{io.ErrUnexpectedEOF}, "%s(PANIC=unexpected EOF)"},
|
|
{"%s", Panic{3}, "%s(PANIC=3)"},
|
|
// GoString
|
|
{"%#v", (*Panic)(nil), "<nil>"}, // nil pointer special case
|
|
{"%#v", Panic{io.ErrUnexpectedEOF}, "%v(PANIC=unexpected EOF)"},
|
|
{"%#v", Panic{3}, "%v(PANIC=3)"},
|
|
// Format
|
|
{"%s", (*PanicF)(nil), "<nil>"}, // nil pointer special case
|
|
{"%s", PanicF{io.ErrUnexpectedEOF}, "%s(PANIC=unexpected EOF)"},
|
|
{"%s", PanicF{3}, "%s(PANIC=3)"},
|
|
}
|
|
|
|
func TestPanics(t *testing.T) {
|
|
for _, tt := range panictests {
|
|
s := Sprintf(tt.fmt, tt.in)
|
|
if s != tt.out {
|
|
t.Errorf("%q: got %q expected %q", tt.fmt, s, tt.out)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Test that erroneous String routine doesn't cause fatal recursion.
|
|
var recurCount = 0
|
|
|
|
type Recur struct {
|
|
i int
|
|
failed *bool
|
|
}
|
|
|
|
func (r Recur) String() string {
|
|
if recurCount++; recurCount > 10 {
|
|
*r.failed = true
|
|
return "FAIL"
|
|
}
|
|
// This will call badVerb. Before the fix, that would cause us to recur into
|
|
// this routine to print %!p(value). Now we don't call the user's method
|
|
// during an error.
|
|
return Sprintf("recur@%p value: %d", r, r.i)
|
|
}
|
|
|
|
func TestBadVerbRecursion(t *testing.T) {
|
|
failed := false
|
|
r := Recur{3, &failed}
|
|
Sprintf("recur@%p value: %d\n", &r, r.i)
|
|
if failed {
|
|
t.Error("fail with pointer")
|
|
}
|
|
failed = false
|
|
r = Recur{4, &failed}
|
|
Sprintf("recur@%p, value: %d\n", r, r.i)
|
|
if failed {
|
|
t.Error("fail with value")
|
|
}
|
|
}
|
|
|
|
func TestIsSpace(t *testing.T) {
|
|
// This tests the internal isSpace function.
|
|
// IsSpace = isSpace is defined in export_test.go.
|
|
for i := rune(0); i <= unicode.MaxRune; i++ {
|
|
if IsSpace(i) != unicode.IsSpace(i) {
|
|
t.Errorf("isSpace(%U) = %v, want %v", i, IsSpace(i), unicode.IsSpace(i))
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestNilDoesNotBecomeTyped(t *testing.T) {
|
|
type A struct{}
|
|
type B struct{}
|
|
var a *A = nil
|
|
var b B = B{}
|
|
got := Sprintf("%s %s %s %s %s", nil, a, nil, b, nil)
|
|
const expect = "%!s(<nil>) %!s(*fmt_test.A=<nil>) %!s(<nil>) {} %!s(<nil>)"
|
|
if got != expect {
|
|
t.Errorf("expected:\n\t%q\ngot:\n\t%q", expect, got)
|
|
}
|
|
}
|