49 lines
973 B
Go
49 lines
973 B
Go
package routing
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import (
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"reflect"
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"testing"
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)
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func TestSliceInto(t *testing.T) {
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slice := []string{"a", "b", "c", "d", "e", "f", "g"}
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limit := int16(3)
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testCases := []struct {
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since int64
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wantPrev int
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wantNext int
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wantSubset []string
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}{
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{
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since: 0,
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wantPrev: -1,
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wantNext: 3,
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wantSubset: slice[0:3],
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},
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{
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since: 3,
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wantPrev: 0,
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wantNext: 6,
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wantSubset: slice[3:6],
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},
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{
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since: 6,
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wantPrev: 3,
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wantNext: -1,
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wantSubset: slice[6:7],
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},
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}
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for _, tc := range testCases {
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subset, prev, next := sliceInto(slice, tc.since, limit)
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if !reflect.DeepEqual(subset, tc.wantSubset) {
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t.Errorf("returned subset is wrong, got %v want %v", subset, tc.wantSubset)
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}
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if prev != tc.wantPrev {
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t.Errorf("returned prev is wrong, got %d want %d", prev, tc.wantPrev)
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}
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if next != tc.wantNext {
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t.Errorf("returned next is wrong, got %d want %d", next, tc.wantNext)
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}
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}
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}
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