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tests: Fix rare test crash (#4175)

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Fix rare test crash by improving the randomness logic.
This commit is contained in:
Karthic Rao
2017-05-03 12:24:22 +05:30
committed by Harshavardhana
parent e5b2e25caf
commit 9b58a669e5
2 changed files with 42 additions and 18 deletions
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35
cmd/server_test.go
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@@ -1833,25 +1833,23 @@ func (s *TestSuiteCommon) TestGetPartialObjectMisAligned(c *C) {
c.Assert(response.StatusCode, Equals, http.StatusOK)
var buffer bytes.Buffer
line := `1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,
1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,
1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,
1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,
1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,
1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,
1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,
1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,
1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,1234567890,
1234567890,1234567890,1234567890,123`
rand.Seed(UTCNow().UnixNano())
// Create a misalgined data.
for i := 0; i < 13*rand.Intn(1<<16); i++ {
buffer.WriteString(fmt.Sprintf("[%05d] %s\n", i, line[:rand.Intn(1<<8)]))
// data to be written into buffer.
data := "1234567890"
// seed the random number generator once.
rand.Seed(3)
// generate a random number between 13 and 200.
randInt := getRandomRange(13, 200, -1)
// write into buffer till length of the buffer is greater than the generated random number.
for i := 0; i <= randInt; i += 10 {
buffer.WriteString(data)
}
putContent := buffer.String()
buf := bytes.NewReader([]byte(putContent))
// String content which is used for put object range test.
putBytes := buffer.Bytes()
putBytes = putBytes[:randInt]
// randomize the order of bytes in the byte array and create a reader.
putBytes = randomizeBytes(putBytes, -1)
buf := bytes.NewReader(putBytes)
putContent := string(putBytes)
objectName := "test-big-file"
// HTTP request to upload the object.
request, err = newTestSignedRequest("PUT", getPutObjectURL(s.endPoint, bucketName, objectName),
@@ -1882,6 +1880,7 @@ func (s *TestSuiteCommon) TestGetPartialObjectMisAligned(c *C) {
// request for last 7 bytes of the object.
{"-7", putContent[len(putContent)-7:]},
}
for _, t := range testCases {
// HTTP request to download the object.
request, err = newTestSignedRequest("GET", getGetObjectURL(s.endPoint, bucketName, objectName),