75 lines
1.5 KiB
Go
75 lines
1.5 KiB
Go
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package pretty
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import (
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"testing"
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)
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type difftest struct {
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a interface{}
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b interface{}
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exp []string
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}
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type S struct {
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A int
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S *S
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I interface{}
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C []int
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}
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var diffs = []difftest{
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{a: nil, b: nil},
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{a: S{A: 1}, b: S{A: 1}},
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{0, "", []string{`int != string`}},
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{0, 1, []string{`0 != 1`}},
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{S{}, new(S), []string{`pretty.S != *pretty.S`}},
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{"a", "b", []string{`"a" != "b"`}},
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{S{}, S{A: 1}, []string{`A: 0 != 1`}},
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{new(S), &S{A: 1}, []string{`A: 0 != 1`}},
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{S{S: new(S)}, S{S: &S{A: 1}}, []string{`S.A: 0 != 1`}},
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{S{}, S{I: 0}, []string{`I: nil != 0`}},
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{S{I: 1}, S{I: "x"}, []string{`I: int != string`}},
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{S{}, S{C: []int{1}}, []string{`C: []int[0] != []int[1]`}},
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{S{C: []int{}}, S{C: []int{1}}, []string{`C: []int[0] != []int[1]`}},
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{S{C: []int{1, 2, 3}}, S{C: []int{1, 2, 4}}, []string{`C[2]: 3 != 4`}},
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{S{}, S{A: 1, S: new(S)}, []string{`A: 0 != 1`, `S: nil != &{0 <nil> <nil> []}`}},
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}
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func TestDiff(t *testing.T) {
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for _, tt := range diffs {
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got := Diff(tt.a, tt.b)
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eq := len(got) == len(tt.exp)
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if eq {
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for i := range got {
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eq = eq && got[i] == tt.exp[i]
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}
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}
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if !eq {
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t.Errorf("diffing % #v", tt.a)
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t.Errorf("with % #v", tt.b)
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diffdiff(t, got, tt.exp)
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continue
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}
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}
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}
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func diffdiff(t *testing.T, got, exp []string) {
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minus(t, "unexpected:", got, exp)
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minus(t, "missing:", exp, got)
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}
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func minus(t *testing.T, s string, a, b []string) {
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var i, j int
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for i = 0; i < len(a); i++ {
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for j = 0; j < len(b); j++ {
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if a[i] == b[j] {
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break
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}
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}
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if j == len(b) {
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t.Error(s, a[i])
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}
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}
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}
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