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bug#39637: mongo-tools test fail with Go 1.13

From: Jack Hill
Subject: bug#39637: mongo-tools test fail with Go 1.13
Date: Sun, 16 Feb 2020 16:28:04 -0500 (EST)
User-agent: Alpine 2.20 (DEB 67 2015-01-07)

Hi Guix,

After the recent Go 1.13 update, the test for mongo-tools package (currently at vervsion 3.4.0) fails with:

flag provided but not defined: -test.testlogfile
Usage of 
        When true, emits results in JSON blocks. Default: 'false'
        When true, all output from GoConvey is suppressed.
        When true, emits story output, otherwise emits dot output. When not 
provided, this flag mirros the value of the '-test.v' flag
  -test.types string
        Comma-separated list of the types of tests to be run (default "unit")
FAIL    github.com/mongodb/mongo-tools/mongofiles       0.002s
command "go" "test" "-v" "github.com/mongodb/mongo-tools/mongofiles" failed 
with status 1

I believe that this is related to a change in Go's testing module with 1.13: https://golang.org/doc/go1.13#testing

For more information, also see the Go bug report: https://github.com/golang/go/issues/31859

Note that mongo-tools provides a number of tools in different Go packages, and the mongofiles tool is the only one that has this error.

I have tried to adding a call to flag.Parse() in TestMain, which I added, as described in the documentation [0], but that did not resolve the problem. I'm not exactly sure why. The same fix worked for containerd [1].

[0] https://golang.org/pkg/testing/#hdr-Main

I wonder if the difference is that mongofiles does not use the flag package directly, but flag.Parse() is being called in the wrong place in one of its dependencies.

A note on versions: the problem persists in the latest release of mongo-tools in the 3.4 series, 3.4.24. I have not tried the other release series, 3.6, 4.0, and 4.2 because those require dependencies not yet packaged in Guix.

I have opened a bug report upstream: https://jira.mongodb.org/browse/TOOLS-2482

Thoughts or suggestions?


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