stringer_test.go

Documentation: fmt

     1  // Copyright 2010 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package fmt_test
     6  
     7  import (
     8  	. "fmt"
     9  	"testing"
    10  )
    11  
    12  type TI int
    13  type TI8 int8
    14  type TI16 int16
    15  type TI32 int32
    16  type TI64 int64
    17  type TU uint
    18  type TU8 uint8
    19  type TU16 uint16
    20  type TU32 uint32
    21  type TU64 uint64
    22  type TUI uintptr
    23  type TF float64
    24  type TF32 float32
    25  type TF64 float64
    26  type TB bool
    27  type TS string
    28  
    29  func (v TI) String() string   { return Sprintf("I: %d", int(v)) }
    30  func (v TI8) String() string  { return Sprintf("I8: %d", int8(v)) }
    31  func (v TI16) String() string { return Sprintf("I16: %d", int16(v)) }
    32  func (v TI32) String() string { return Sprintf("I32: %d", int32(v)) }
    33  func (v TI64) String() string { return Sprintf("I64: %d", int64(v)) }
    34  func (v TU) String() string   { return Sprintf("U: %d", uint(v)) }
    35  func (v TU8) String() string  { return Sprintf("U8: %d", uint8(v)) }
    36  func (v TU16) String() string { return Sprintf("U16: %d", uint16(v)) }
    37  func (v TU32) String() string { return Sprintf("U32: %d", uint32(v)) }
    38  func (v TU64) String() string { return Sprintf("U64: %d", uint64(v)) }
    39  func (v TUI) String() string  { return Sprintf("UI: %d", uintptr(v)) }
    40  func (v TF) String() string   { return Sprintf("F: %f", float64(v)) }
    41  func (v TF32) String() string { return Sprintf("F32: %f", float32(v)) }
    42  func (v TF64) String() string { return Sprintf("F64: %f", float64(v)) }
    43  func (v TB) String() string   { return Sprintf("B: %t", bool(v)) }
    44  func (v TS) String() string   { return Sprintf("S: %q", string(v)) }
    45  
    46  func check(t *testing.T, got, want string) {
    47  	if got != want {
    48  		t.Error(got, "!=", want)
    49  	}
    50  }
    51  
    52  func TestStringer(t *testing.T) {
    53  	s := Sprintf("%v %v %v %v %v", TI(0), TI8(1), TI16(2), TI32(3), TI64(4))
    54  	check(t, s, "I: 0 I8: 1 I16: 2 I32: 3 I64: 4")
    55  	s = Sprintf("%v %v %v %v %v %v", TU(5), TU8(6), TU16(7), TU32(8), TU64(9), TUI(10))
    56  	check(t, s, "U: 5 U8: 6 U16: 7 U32: 8 U64: 9 UI: 10")
    57  	s = Sprintf("%v %v %v", TF(1.0), TF32(2.0), TF64(3.0))
    58  	check(t, s, "F: 1.000000 F32: 2.000000 F64: 3.000000")
    59  	s = Sprintf("%v %v", TB(true), TS("x"))
    60  	check(t, s, "B: true S: \"x\"")
    61  }
    62
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