101 lines
2.7 KiB
Go
101 lines
2.7 KiB
Go
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package objchange
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import (
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"fmt"
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"testing"
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"github.com/zclconf/go-cty/cty"
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)
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func TestLongestCommonSubsequence(t *testing.T) {
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tests := []struct {
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xs []cty.Value
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ys []cty.Value
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want []cty.Value
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}{
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{
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[]cty.Value{},
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[]cty.Value{},
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[]cty.Value{},
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},
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{
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[]cty.Value{cty.NumberIntVal(1), cty.NumberIntVal(2)},
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[]cty.Value{cty.NumberIntVal(1), cty.NumberIntVal(2)},
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[]cty.Value{cty.NumberIntVal(1), cty.NumberIntVal(2)},
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},
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{
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[]cty.Value{cty.NumberIntVal(1), cty.NumberIntVal(2)},
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[]cty.Value{cty.NumberIntVal(3), cty.NumberIntVal(4)},
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[]cty.Value{},
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},
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{
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[]cty.Value{cty.NumberIntVal(2)},
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[]cty.Value{cty.NumberIntVal(1), cty.NumberIntVal(2)},
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[]cty.Value{cty.NumberIntVal(2)},
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},
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{
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[]cty.Value{cty.NumberIntVal(1)},
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[]cty.Value{cty.NumberIntVal(1), cty.NumberIntVal(2)},
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[]cty.Value{cty.NumberIntVal(1)},
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},
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{
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[]cty.Value{cty.NumberIntVal(2), cty.NumberIntVal(1)},
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[]cty.Value{cty.NumberIntVal(1), cty.NumberIntVal(2)},
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[]cty.Value{cty.NumberIntVal(1)}, // arbitrarily selected 1; 2 would also be valid
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},
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{
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[]cty.Value{cty.NumberIntVal(1), cty.NumberIntVal(2), cty.NumberIntVal(3), cty.NumberIntVal(4)},
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[]cty.Value{cty.NumberIntVal(2), cty.NumberIntVal(4), cty.NumberIntVal(5)},
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[]cty.Value{cty.NumberIntVal(2), cty.NumberIntVal(4)},
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},
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{
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[]cty.Value{cty.NumberIntVal(1), cty.NumberIntVal(2), cty.NumberIntVal(3), cty.NumberIntVal(4)},
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[]cty.Value{cty.NumberIntVal(4), cty.NumberIntVal(2), cty.NumberIntVal(5)},
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[]cty.Value{cty.NumberIntVal(4)}, // 2 would also be valid
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},
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{
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[]cty.Value{cty.NumberIntVal(1), cty.NumberIntVal(2), cty.NumberIntVal(3), cty.NumberIntVal(5)},
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[]cty.Value{cty.NumberIntVal(2), cty.NumberIntVal(4), cty.NumberIntVal(5)},
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[]cty.Value{cty.NumberIntVal(2), cty.NumberIntVal(5)},
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},
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// unknowns never compare as equal
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{
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[]cty.Value{cty.NumberIntVal(1), cty.UnknownVal(cty.Number), cty.NumberIntVal(3)},
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[]cty.Value{cty.NumberIntVal(1), cty.UnknownVal(cty.Number), cty.NumberIntVal(3)},
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[]cty.Value{cty.NumberIntVal(1), cty.NumberIntVal(3)},
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},
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{
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[]cty.Value{cty.UnknownVal(cty.Number)},
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[]cty.Value{cty.UnknownVal(cty.Number)},
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[]cty.Value{},
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},
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}
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for _, test := range tests {
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t.Run(fmt.Sprintf("%#v,%#v", test.xs, test.ys), func(t *testing.T) {
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got := LongestCommonSubsequence(test.xs, test.ys)
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wrong := func() {
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t.Fatalf(
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"wrong result\nX: %#v\nY: %#v\ngot: %#v\nwant: %#v",
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test.xs, test.ys, got, test.want,
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)
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}
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if len(got) != len(test.want) {
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wrong()
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}
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for i := range got {
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if got[i] == cty.NilVal {
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wrong()
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}
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if !got[i].RawEquals(test.want[i]) {
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wrong()
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}
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}
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})
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}
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}
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