[PATCH] test: Fix UTF-8 JSON tests in Python 3

[Tomi Ollila]

On Tue, Dec 04 2012, Austin Clements <amdragon at MIT.EDU> wrote:

> test_expect_equal_json uses json.tool from the system Python.  While
> Python 2 wasn't picky about the encoding of stdin, Python 3 decodes
> stdin strictly according to the environment.  Since we set LC_ALL=C
> for the tests, Python 3's json.tool was assuming stdin would be in
> ASCII and aborting when it couldn't decode the UTF-8 characters from
> some of the JSON tests.  This patch sets the PYTHONIOENCODING
> environment variable to utf-8 when invoking json.tool to override
> Python's default encoding choice.
> ---

LGTM.

Tomi

>  test/test-lib.sh |    9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/test/test-lib.sh b/test/test-lib.sh
> index f169785..9487526 100644
> --- a/test/test-lib.sh
> +++ b/test/test-lib.sh
> @@ -534,8 +534,13 @@ test_expect_equal_file ()
>  # canonicalized before diff'ing.  If an argument cannot be parsed, it
>  # is used unchanged so that there's something to diff against.
>  test_expect_equal_json () {
> -    output=$(echo "$1" | python -mjson.tool || echo "$1")
> -    expected=$(echo "$2" | python -mjson.tool || echo "$2")
> +    # The test suite forces LC_ALL=C, but this causes Python 3 to
> +    # decode stdin as ASCII.  We need to read JSON in UTF-8, so
> +    # override Python's stdio encoding defaults.
> +    output=$(echo "$1" | PYTHONIOENCODING=utf-8 python -mjson.tool \
> +        || echo "$1")
> +    expected=$(echo "$2" | PYTHONIOENCODING=utf-8 python -mjson.tool \
> +        || echo "$2")
>      shift 2
>      test_expect_equal "$output" "$expected" "$@"
>  }
> -- 
> 1.7.10.4
>
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