blob: 08ec64b85e0a5066de307f392cc0f9e4e6002c6a [file] [log] [blame]
package pretty
import (
"bytes"
"fmt"
"log"
"reflect"
"testing"
"unsafe"
)
var (
_ Logfer = (*testing.T)(nil)
_ Logfer = (*testing.B)(nil)
_ Printfer = (*log.Logger)(nil)
)
type difftest struct {
a interface{}
b interface{}
exp []string
}
type S struct {
A int
S *S
I interface{}
C []int
}
type (
N struct{ N int }
E interface{}
)
var (
c0 = make(chan int)
c1 = make(chan int)
f0 = func() {}
f1 = func() {}
i0 = 0
i1 = 1
)
var diffs = []difftest{
{a: nil, b: nil},
{a: S{A: 1}, b: S{A: 1}},
{0, "", []string{`int != string`}},
{0, 1, []string{`0 != 1`}},
{S{}, new(S), []string{`pretty.S != *pretty.S`}},
{"a", "b", []string{`"a" != "b"`}},
{S{}, S{A: 1}, []string{`A: 0 != 1`}},
{new(S), &S{A: 1}, []string{`A: 0 != 1`}},
{S{S: new(S)}, S{S: &S{A: 1}}, []string{`S.A: 0 != 1`}},
{S{}, S{I: 0}, []string{`I: nil != int(0)`}},
{S{I: 1}, S{I: "x"}, []string{`I: int != string`}},
{S{}, S{C: []int{1}}, []string{`C: []int[0] != []int[1]`}},
{S{C: []int{}}, S{C: []int{1}}, []string{`C: []int[0] != []int[1]`}},
{S{C: []int{1, 2, 3}}, S{C: []int{1, 2, 4}}, []string{`C[2]: 3 != 4`}},
{S{}, S{A: 1, S: new(S)}, []string{`A: 0 != 1`, `S: nil != &pretty.S{}`}},
// unexported fields of every reflect.Kind (both equal and unequal)
{struct{ x bool }{false}, struct{ x bool }{false}, nil},
{struct{ x bool }{false}, struct{ x bool }{true}, []string{`x: false != true`}},
{struct{ x int }{0}, struct{ x int }{0}, nil},
{struct{ x int }{0}, struct{ x int }{1}, []string{`x: 0 != 1`}},
{struct{ x int8 }{0}, struct{ x int8 }{0}, nil},
{struct{ x int8 }{0}, struct{ x int8 }{1}, []string{`x: 0 != 1`}},
{struct{ x int16 }{0}, struct{ x int16 }{0}, nil},
{struct{ x int16 }{0}, struct{ x int16 }{1}, []string{`x: 0 != 1`}},
{struct{ x int32 }{0}, struct{ x int32 }{0}, nil},
{struct{ x int32 }{0}, struct{ x int32 }{1}, []string{`x: 0 != 1`}},
{struct{ x int64 }{0}, struct{ x int64 }{0}, nil},
{struct{ x int64 }{0}, struct{ x int64 }{1}, []string{`x: 0 != 1`}},
{struct{ x uint }{0}, struct{ x uint }{0}, nil},
{struct{ x uint }{0}, struct{ x uint }{1}, []string{`x: 0 != 1`}},
{struct{ x uint8 }{0}, struct{ x uint8 }{0}, nil},
{struct{ x uint8 }{0}, struct{ x uint8 }{1}, []string{`x: 0 != 1`}},
{struct{ x uint16 }{0}, struct{ x uint16 }{0}, nil},
{struct{ x uint16 }{0}, struct{ x uint16 }{1}, []string{`x: 0 != 1`}},
{struct{ x uint32 }{0}, struct{ x uint32 }{0}, nil},
{struct{ x uint32 }{0}, struct{ x uint32 }{1}, []string{`x: 0 != 1`}},
{struct{ x uint64 }{0}, struct{ x uint64 }{0}, nil},
{struct{ x uint64 }{0}, struct{ x uint64 }{1}, []string{`x: 0 != 1`}},
{struct{ x uintptr }{0}, struct{ x uintptr }{0}, nil},
{struct{ x uintptr }{0}, struct{ x uintptr }{1}, []string{`x: 0 != 1`}},
{struct{ x float32 }{0}, struct{ x float32 }{0}, nil},
{struct{ x float32 }{0}, struct{ x float32 }{1}, []string{`x: 0 != 1`}},
{struct{ x float64 }{0}, struct{ x float64 }{0}, nil},
{struct{ x float64 }{0}, struct{ x float64 }{1}, []string{`x: 0 != 1`}},
{struct{ x complex64 }{0}, struct{ x complex64 }{0}, nil},
{struct{ x complex64 }{0}, struct{ x complex64 }{1}, []string{`x: (0+0i) != (1+0i)`}},
{struct{ x complex128 }{0}, struct{ x complex128 }{0}, nil},
{struct{ x complex128 }{0}, struct{ x complex128 }{1}, []string{`x: (0+0i) != (1+0i)`}},
{struct{ x [1]int }{[1]int{0}}, struct{ x [1]int }{[1]int{0}}, nil},
{struct{ x [1]int }{[1]int{0}}, struct{ x [1]int }{[1]int{1}}, []string{`x[0]: 0 != 1`}},
{struct{ x chan int }{c0}, struct{ x chan int }{c0}, nil},
{struct{ x chan int }{c0}, struct{ x chan int }{c1}, []string{fmt.Sprintf("x: %p != %p", c0, c1)}},
{struct{ x func() }{f0}, struct{ x func() }{f0}, nil},
{struct{ x func() }{f0}, struct{ x func() }{f1}, []string{fmt.Sprintf("x: %p != %p", f0, f1)}},
{struct{ x interface{} }{0}, struct{ x interface{} }{0}, nil},
{struct{ x interface{} }{0}, struct{ x interface{} }{1}, []string{`x: 0 != 1`}},
{struct{ x interface{} }{0}, struct{ x interface{} }{""}, []string{`x: int != string`}},
{struct{ x interface{} }{0}, struct{ x interface{} }{nil}, []string{`x: int(0) != nil`}},
{struct{ x interface{} }{nil}, struct{ x interface{} }{0}, []string{`x: nil != int(0)`}},
{struct{ x map[int]int }{map[int]int{0: 0}}, struct{ x map[int]int }{map[int]int{0: 0}}, nil},
{struct{ x map[int]int }{map[int]int{0: 0}}, struct{ x map[int]int }{map[int]int{0: 1}}, []string{`x[0]: 0 != 1`}},
{struct{ x *int }{new(int)}, struct{ x *int }{new(int)}, nil},
{struct{ x *int }{&i0}, struct{ x *int }{&i1}, []string{`x: 0 != 1`}},
{struct{ x *int }{nil}, struct{ x *int }{&i0}, []string{`x: nil != &int(0)`}},
{struct{ x *int }{&i0}, struct{ x *int }{nil}, []string{`x: &int(0) != nil`}},
{struct{ x []int }{[]int{0}}, struct{ x []int }{[]int{0}}, nil},
{struct{ x []int }{[]int{0}}, struct{ x []int }{[]int{1}}, []string{`x[0]: 0 != 1`}},
{struct{ x string }{"a"}, struct{ x string }{"a"}, nil},
{struct{ x string }{"a"}, struct{ x string }{"b"}, []string{`x: "a" != "b"`}},
{struct{ x N }{N{0}}, struct{ x N }{N{0}}, nil},
{struct{ x N }{N{0}}, struct{ x N }{N{1}}, []string{`x.N: 0 != 1`}},
{
struct{ x unsafe.Pointer }{unsafe.Pointer(uintptr(0))},
struct{ x unsafe.Pointer }{unsafe.Pointer(uintptr(0))},
nil,
},
{
struct{ x unsafe.Pointer }{unsafe.Pointer(uintptr(0))},
struct{ x unsafe.Pointer }{unsafe.Pointer(uintptr(1))},
[]string{`x: 0x0 != 0x1`},
},
}
func TestDiff(t *testing.T) {
for _, tt := range diffs {
expectDiffOutput(t, tt.a, tt.b, tt.exp)
}
}
func expectDiffOutput(t *testing.T, a, b interface{}, exp []string) {
got := Diff(a, b)
eq := len(got) == len(exp)
if eq {
for i := range got {
eq = eq && got[i] == exp[i]
}
}
if !eq {
t.Errorf("diffing % #v", a)
t.Errorf("with % #v", b)
diffdiff(t, got, exp)
}
}
func TestKeyEqual(t *testing.T) {
var emptyInterfaceZero interface{} = 0
cases := []interface{}{
new(bool),
new(int),
new(int8),
new(int16),
new(int32),
new(int64),
new(uint),
new(uint8),
new(uint16),
new(uint32),
new(uint64),
new(uintptr),
new(float32),
new(float64),
new(complex64),
new(complex128),
new([1]int),
new(chan int),
new(unsafe.Pointer),
new(interface{}),
&emptyInterfaceZero,
new(*int),
new(string),
new(struct{ int }),
}
for _, test := range cases {
rv := reflect.ValueOf(test).Elem()
if !keyEqual(rv, rv) {
t.Errorf("keyEqual(%s, %s) = false want true", rv.Type(), rv.Type())
}
}
}
func TestFdiff(t *testing.T) {
var buf bytes.Buffer
Fdiff(&buf, 0, 1)
want := "0 != 1\n"
if got := buf.String(); got != want {
t.Errorf("Fdiff(0, 1) = %q want %q", got, want)
}
}
func TestDiffCycle(t *testing.T) {
// Diff two cyclic structs
a := &I{i: 1, R: nil}
a.R = a
b := &I{i: 2, R: nil}
b.R = b
expectDiffOutput(t, a, b, []string{
`i: 1 != 2`,
})
// Diff two equal cyclic structs
b.i = 1
expectDiffOutput(t, a, b, []string{})
// Diff two structs with different cycles
b2 := &I{i: 1, R: b}
b.R = b2
expectDiffOutput(t, a, b, []string{`R: pretty.I{
i: 1,
R: &pretty.I{(CYCLIC REFERENCE)},
} (previously visited) != pretty.I{
i: 1,
R: &pretty.I{
i: 1,
R: &pretty.I{(CYCLIC REFERENCE)},
},
}`})
// ... and the same in the other direction
expectDiffOutput(t, b, a, []string{`R: pretty.I{
i: 1,
R: &pretty.I{
i: 1,
R: &pretty.I{(CYCLIC REFERENCE)},
},
} != pretty.I{
i: 1,
R: &pretty.I{(CYCLIC REFERENCE)},
} (previously visited)`})
}
func diffdiff(t *testing.T, got, exp []string) {
minus(t, "unexpected:", got, exp)
minus(t, "missing:", exp, got)
}
func minus(t *testing.T, s string, a, b []string) {
var i, j int
for i = 0; i < len(a); i++ {
for j = 0; j < len(b); j++ {
if a[i] == b[j] {
break
}
}
if j == len(b) {
t.Error(s, a[i])
}
}
}