[Webkit-unassigned] [Bug 52432] New: [Chromium] The stdout and stderr output of DRT is in unknown order.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=52432

           Summary: [Chromium] The stdout and stderr output of DRT is in
                    unknown order.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: zhenghao at google.com


In ChromiumDriver.start(), it combines the output of stdout and stderr of subprocess DRT. And then in run_test(), it assumes that stderr output all comes before the line "#URL:". But actually the sequence of stdout and stderr is undefined, which may break some layout tests under some environment unexpectedly.

In WebKitDriver, it uses a nice util ServerProcess. It seperate stdout and stderr, and uses read with timeout. This could be a better solution.

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