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test(util) test with many seeds #238

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test(util) test with many seeds #238

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2 changes: 1 addition & 1 deletion util/util.go
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Original file line number Diff line number Diff line change
Expand Up @@ -100,7 +100,7 @@ type randGen struct {
src rand.Source
}

func NewFastRand() io.Reader {
func NewFastRand(seed int64) io.Reader {
return &randGen{rand.NewSource(time.Now().UnixNano())}
}

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14 changes: 12 additions & 2 deletions util/util_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -30,8 +30,18 @@ func TestKey(t *testing.T) {
}

func TestByteChanReader(t *testing.T) {
var numSeedsToTest = 1000
if testing.Short() {
numSeedsToTest = 100
}
for i := 0; i < numSeedsToTest; i++ {
testByteChanReaderWithSeed(int64(i), t)
}
}

func testByteChanReaderWithSeed(seed int64, t *testing.T) {
data := make([]byte, 1024*1024)
r := NewFastRand()
r := NewFastRand(seed)
r.Read(data)
dch := make(chan []byte, 8)

Expand All @@ -55,7 +65,7 @@ func TestByteChanReader(t *testing.T) {
}

if !bytes.Equal(out, data) {
t.Fatal("Reader failed to stream correct bytes")
t.Errorf("Reader failed to stream correct bytes with seed %d", seed)
}
}

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