Re: [PATCH 2/3] test: Add `test_emacs_expect_t'.

[Dmitry Kurochkin <dmitry.kurochkin@gmail.com>]

On Tue, 17 Jan 2012 14:07:03 +0000, David Edmondson <dme@dme.org> wrote:
> Add a new test function to allow simpler testing of emacs
> functionality.
> 
> `test_emacs_expect_t' takes one argument - a list expression to
> evaluate. The test passes if the expression returns `t', otherwise it
> fails and the output is reported to the tester.
> ---
> 
> Re-worked as Dmitry suggested.
> 
>  test/README                  |    8 ++++++++
>  test/emacs-test-functions.sh |    9 +++++++++
>  test/notmuch-test            |    1 +
>  test/test-lib.sh             |   33 +++++++++++++++++++++++++++++++++
>  4 files changed, 51 insertions(+), 0 deletions(-)
>  create mode 100755 test/emacs-test-functions.sh
> 
> diff --git a/test/README b/test/README
> index bde6db0..9dbe2ee 100644
> --- a/test/README
> +++ b/test/README
> @@ -189,6 +189,14 @@ library for your script to use.
>     tests that may run in the same Emacs instance.  Use `let' instead
>     so the scope of the changed variables is limited to a single test.
>  
> + test_emacs_expect_t <emacs-lisp-expressions>
> +
> +  This function executes the provided emacs lisp script within
> +  emacs in a manner similar to 'test_emacs'. The expressions should
> +  return the value `t' to indicate that the test has passed. If the
> +  test does not return `t' then it is considered failed and all data
> +  returned by the test is reported to the tester.
> +
>   test_done
>  
>     Your test script must have test_done at the end.  Its purpose
> diff --git a/test/emacs-test-functions.sh b/test/emacs-test-functions.sh
> new file mode 100755
> index 0000000..0e1f9fc
> --- /dev/null
> +++ b/test/emacs-test-functions.sh
> @@ -0,0 +1,9 @@
> +#!/usr/bin/env bash
> +
> +test_description="emacs test function sanity"
> +. test-lib.sh
> +
> +test_begin_subtest "emacs test function sanity"
> +test_emacs_expect_t 't'
> +
> +test_done
> diff --git a/test/notmuch-test b/test/notmuch-test
> index 6a99ae3..d034f99 100755
> --- a/test/notmuch-test
> +++ b/test/notmuch-test
> @@ -52,6 +52,7 @@ TESTS="
>    python
>    hooks
>    argument-parsing
> +  emacs-test-functions.sh
>  "
>  TESTS=${NOTMUCH_TESTS:=$TESTS}
>  
> diff --git a/test/test-lib.sh b/test/test-lib.sh
> index 7c9ce24..4b05760 100644
> --- a/test/test-lib.sh
> +++ b/test/test-lib.sh
> @@ -503,6 +503,39 @@ test_expect_equal_file ()
>      fi
>  }
>  
> +test_emacs_expect_t () {
> +	test "$#" = 1 || error "bug in the test script: not 1 parameter to test_emacs_expect_t"
> +
> +	# Run the test.
> +	if ! test_skip "$test_subtest_name"
> +	then
> +		# We cannot call 'test_emacs' in a subshell, because
> +		# the setting of EMACS_SERVER would not persist
> +		# throughout a sequence of tests, so we use a
> +		# temporary file.
> +		tmp="$TMPDIR"; if [ -z "$tmp" ]; then tmp=/tmp; fi
> +		output="$tmp/test_emacs_output.$$"
> +		test_emacs "$1" > "${output}"
> +		result=$(cat "${output}")
> +		rm -f "${output}"
> +	fi
> +
> +	# Restore state after the test.
> +	exec 1>&6 2>&7		# Restore stdout and stderr
> +	inside_subtest=
> +
> +	# Report success/failure.
> +	if ! test_skip "$test_subtest_name"
> +	then
> +		if [ "$result" == t ]
> +		then
> +			test_ok_ "$test_subtest_name"
> +		else
> +			test_failure_ "$test_subtest_name" "$(eval printf ${result})"
> +		fi
> +	fi
> +}
> +

Sorry, I still do not understand why we can not implement
test_emacs_expect_t() like:

  result=${test_emacs $@}
  test_expect_equal $result t

Can you please explain?

Regards,
  Dmitry

>  NOTMUCH_NEW ()
>  {
>      notmuch new | grep -v -E -e '^Processed [0-9]*( total)? file|Found [0-9]* total file'
> -- 
> 1.7.7.3
> 
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