[jira] [Created] (MESOS-4656) strings::split behaves incorrectly when n=1

["Benjamin Mahler (JIRA)" <ji...@apache.org>]

Benjamin Mahler created MESOS-4656:
--------------------------------------

             Summary: strings::split behaves incorrectly when n=1
                 Key: MESOS-4656
                 URL: https://issues.apache.org/jira/browse/MESOS-4656
             Project: Mesos
          Issue Type: Bug
          Components: stout
            Reporter: Benjamin Mahler
            Assignee: Benjamin Mahler


While looking at the patches for MESOS-3833, I noticed that the code for strings::split behaves incorrectly for n=1 (maximum number of tokens).

Adding the following test case demonstrates the issue:

{code}
TEST(StringsTest, SplitNOne)
{
  vector<string> tokens = strings::split("foo,bar,,,", ",", 1);
  ASSERT_EQ(1u, tokens.size());
  EXPECT_EQ("foo,bar,,,", tokens[0]);
}
{code}

This fails as follows:

{noformat}
[ RUN      ] StringsTest.SplitNOne
../../../../3rdparty/libprocess/3rdparty/stout/tests/strings_tests.cpp:357: Failure
Value of: tokens.size()
  Actual: 5
Expected: 1u
Which is: 1
[  FAILED  ] StringsTest.SplitNOne (0 ms)
{noformat}



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