40 lines
940 B
Go
40 lines
940 B
Go
package storage
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import (
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"bytes"
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"math"
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"reflect"
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"testing"
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)
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// TestReversion tests that reversion could be encoded to and decoded from
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// bytes slice. Moreover, the lexicograph order of its byte slice representation
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// follows the order of (main, sub).
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func TestReversion(t *testing.T) {
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tests := []reversion{
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// order in (main, sub)
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reversion{},
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reversion{main: 1, sub: 0},
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reversion{main: 1, sub: 1},
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reversion{main: 2, sub: 0},
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reversion{main: math.MaxInt64, sub: math.MaxInt64},
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}
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bs := make([][]byte, len(tests))
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for i, tt := range tests {
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b := newRevBytes()
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revToBytes(tt, b)
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bs[i] = b
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if grev := bytesToRev(b); !reflect.DeepEqual(grev, tt) {
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t.Errorf("#%d: reversion = %+v, want %+v", i, grev, tt)
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}
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}
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for i := 0; i < len(tests)-1; i++ {
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if bytes.Compare(bs[i], bs[i+1]) >= 0 {
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t.Errorf("#%d: %v (%+v) should be smaller than %v (%+v)", i, bs[i], tests[i], bs[i+1], tests[i+1])
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}
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}
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}
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