site/vendor/github.com/kr/pretty/formatter_test.go

289 lines
5.0 KiB
Go

package pretty
import (
"fmt"
"io"
"strings"
"testing"
"unsafe"
)
type test struct {
v interface{}
s string
}
type passtest struct {
v interface{}
f, s string
}
type LongStructTypeName struct {
longFieldName interface{}
otherLongFieldName interface{}
}
type SA struct {
t *T
v T
}
type T struct {
x, y int
}
type F int
func (f F) Format(s fmt.State, c rune) {
fmt.Fprintf(s, "F(%d)", int(f))
}
type Stringer struct { i int }
func (s *Stringer) String() string { return "foo" }
var long = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
var passthrough = []passtest{
{1, "%d", "1"},
{"a", "%s", "a"},
{&Stringer{}, "%s", "foo"},
}
func TestPassthrough(t *testing.T) {
for _, tt := range passthrough {
s := fmt.Sprintf(tt.f, Formatter(tt.v))
if tt.s != s {
t.Errorf("expected %q", tt.s)
t.Errorf("got %q", s)
t.Errorf("expraw\n%s", tt.s)
t.Errorf("gotraw\n%s", s)
}
}
}
var gosyntax = []test{
{nil, `nil`},
{"", `""`},
{"a", `"a"`},
{1, "int(1)"},
{1.0, "float64(1)"},
{[]int(nil), "[]int(nil)"},
{[0]int{}, "[0]int{}"},
{complex(1, 0), "(1+0i)"},
//{make(chan int), "(chan int)(0x1234)"},
{unsafe.Pointer(uintptr(unsafe.Pointer(&long))), fmt.Sprintf("unsafe.Pointer(0x%02x)", uintptr(unsafe.Pointer(&long)))},
{func(int) {}, "func(int) {...}"},
{map[int]int{1: 1}, "map[int]int{1:1}"},
{int32(1), "int32(1)"},
{io.EOF, `&errors.errorString{s:"EOF"}`},
{[]string{"a"}, `[]string{"a"}`},
{
[]string{long},
`[]string{"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"}`,
},
{F(5), "pretty.F(5)"},
{
SA{&T{1, 2}, T{3, 4}},
`pretty.SA{
t: &pretty.T{x:1, y:2},
v: pretty.T{x:3, y:4},
}`,
},
{
map[int][]byte{1: {}},
`map[int][]uint8{
1: {},
}`,
},
{
map[int]T{1: {}},
`map[int]pretty.T{
1: {},
}`,
},
{
long,
`"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"`,
},
{
LongStructTypeName{
longFieldName: LongStructTypeName{},
otherLongFieldName: long,
},
`pretty.LongStructTypeName{
longFieldName: pretty.LongStructTypeName{},
otherLongFieldName: "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789",
}`,
},
{
&LongStructTypeName{
longFieldName: &LongStructTypeName{},
otherLongFieldName: (*LongStructTypeName)(nil),
},
`&pretty.LongStructTypeName{
longFieldName: &pretty.LongStructTypeName{},
otherLongFieldName: (*pretty.LongStructTypeName)(nil),
}`,
},
{
[]LongStructTypeName{
{nil, nil},
{3, 3},
{long, nil},
},
`[]pretty.LongStructTypeName{
{},
{
longFieldName: int(3),
otherLongFieldName: int(3),
},
{
longFieldName: "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789",
otherLongFieldName: nil,
},
}`,
},
{
[]interface{}{
LongStructTypeName{nil, nil},
[]byte{1, 2, 3},
T{3, 4},
LongStructTypeName{long, nil},
},
`[]interface {}{
pretty.LongStructTypeName{},
[]uint8{0x1, 0x2, 0x3},
pretty.T{x:3, y:4},
pretty.LongStructTypeName{
longFieldName: "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789",
otherLongFieldName: nil,
},
}`,
},
}
func TestGoSyntax(t *testing.T) {
for _, tt := range gosyntax {
s := fmt.Sprintf("%# v", Formatter(tt.v))
if tt.s != s {
t.Errorf("expected %q", tt.s)
t.Errorf("got %q", s)
t.Errorf("expraw\n%s", tt.s)
t.Errorf("gotraw\n%s", s)
}
}
}
type I struct {
i int
R interface{}
}
func (i *I) I() *I { return i.R.(*I) }
func TestCycle(t *testing.T) {
type A struct{ *A }
v := &A{}
v.A = v
// panics from stack overflow without cycle detection
t.Logf("Example cycle:\n%# v", Formatter(v))
p := &A{}
s := fmt.Sprintf("%# v", Formatter([]*A{p, p}))
if strings.Contains(s, "CYCLIC") {
t.Errorf("Repeated address detected as cyclic reference:\n%s", s)
}
type R struct {
i int
*R
}
r := &R{
i: 1,
R: &R{
i: 2,
R: &R{
i: 3,
},
},
}
r.R.R.R = r
t.Logf("Example longer cycle:\n%# v", Formatter(r))
r = &R{
i: 1,
R: &R{
i: 2,
R: &R{
i: 3,
R: &R{
i: 4,
R: &R{
i: 5,
R: &R{
i: 6,
R: &R{
i: 7,
R: &R{
i: 8,
R: &R{
i: 9,
R: &R{
i: 10,
R: &R{
i: 11,
},
},
},
},
},
},
},
},
},
},
}
// here be pirates
r.R.R.R.R.R.R.R.R.R.R.R = r
t.Logf("Example very long cycle:\n%# v", Formatter(r))
i := &I{
i: 1,
R: &I{
i: 2,
R: &I{
i: 3,
R: &I{
i: 4,
R: &I{
i: 5,
R: &I{
i: 6,
R: &I{
i: 7,
R: &I{
i: 8,
R: &I{
i: 9,
R: &I{
i: 10,
R: &I{
i: 11,
},
},
},
},
},
},
},
},
},
},
}
iv := i.I().I().I().I().I().I().I().I().I().I()
*iv = *i
t.Logf("Example long interface cycle:\n%# v", Formatter(i))
}