Fabian Stelzer <fs@xxxxxxxxxxxx> writes:
> In certain environments or for specific test scenarios we might expect a
> specific prerequisite check to be succeed. Therefore we would like to
"to be succeed" -> "to succeed"?
> trigger an error when running our tests if this is not the case.
>
> To remedy this we add the environment variable GIT_TEST_REQUIRE_PREREQ
> which can be set to a comma separated list of prereqs. If one of these
> prereq tests fail then the whole test run will abort.
>
> Signed-off-by: Fabian Stelzer <fs@xxxxxxxxxxxx>
> ---
> t/README | 6 ++++++
> t/test-lib-functions.sh | 11 +++++++++++
> 2 files changed, 17 insertions(+)
>
> diff --git a/t/README b/t/README
> index 29f72354bf..18ce75976e 100644
> --- a/t/README
> +++ b/t/README
> @@ -466,6 +466,12 @@ explicitly providing repositories when accessing submodule objects is
> complete or needs to be abandoned for whatever reason (in which case the
> migrated codepaths still retain their performance benefits).
>
> +GIT_TEST_REQUIRE_PREREQ=<list> allows specifying a comma speparated list of
> +prereqs that are required to succeed. If a prereq in this list is triggered by
> +a test and then fails then the whole test run will abort. This can help to make
> +sure the expected tests are executed and not silently skipped when their
> +dependency breaks or is simply not present in a new environment.
> +
> Naming Tests
> ------------
>
> diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
> index eef2262a36..2c8abf3420 100644
> --- a/t/test-lib-functions.sh
> +++ b/t/test-lib-functions.sh
> @@ -680,6 +680,17 @@ test_have_prereq () {
> # Keep a list of missing prerequisites; restore
> # the negative marker if necessary.
> prerequisite=${negative_prereq:+!}$prerequisite
> +
> + # Abort if this prereq was marked as required
> + if test -n $GIT_TEST_REQUIRE_PREREQ
> + then
> + case ",$GIT_TEST_REQUIRE_PREREQ," in
> + *,$prerequisite,*)
> + error "required prereq $prerequisite failed"
> + ;;
> + esac
> + fi
> +
> if test -z "$missing_prereq"
> then
> missing_prereq=$prerequisite
