[PATCH v4 0/6] t: mark "files"-backend specific tests

Hi,

this is the fourth version of my patch series that addresses tests which are specific to the "files" backend. There is only a single change compared to v3, which is an improved commit message for the first patch.

Thanks!

Patrick

Patrick Steinhardt (6):
  t1300: make tests more robust with non-default ref backends
  t1301: mark test for `core.sharedRepository` as reffiles specific
  t1302: make tests more robust with new extensions
  t1419: mark test suite as files-backend specific
  t5526: break test submodule differently
  t: mark tests regarding git-pack-refs(1) to be backend specific

 t/t1300-config.sh             | 78 ++++++++++++++++++++++-------------
 t/t1301-shared-repo.sh        |  2 +-
 t/t1302-repo-version.sh       | 23 +++++++----
 t/t1409-avoid-packing-refs.sh |  6 +++
 t/t1419-exclude-refs.sh       |  6 +++
 t/t3210-pack-refs.sh          |  6 +++
 t/t5526-fetch-submodules.sh   |  2 +-
 7 files changed, 85 insertions(+), 38 deletions(-)

Range-diff against v3:
1:  a57e57a7c3 ! 1:  80a74bbb56 t1300: make tests more robust with non-default ref backends
    @@ Commit message
         t1300: make tests more robust with non-default ref backends
     
         The t1300 test suite exercises the git-config(1) tool. To do so, the
    -    test overwrites ".git/config" to contain custom contents. While this is
    -    easy enough to do, it may create problems when using a non-default
    -    repository format because this causes us to overwrite the repository
    -    format version as well as any potential extensions. With the upcoming
    -    "reftable" ref backend the result is that Git would try to access refs
    -    via the "files" backend even though the repository has been initialized
    -    with the "reftable" backend, which will cause failures when trying to
    -    access any refs.
    +    test overwrites ".git/config" to contain custom contents in several
    +    places with code like the following:
     
    -    Refactor tests which access the refdb to be more robust by using their
    -    own separate repositories, which allows us to be more careful and not
    -    discard required extensions.
    +    ```
    +    cat > .git/config <<\EOF
    +    ...
    +    EOF
    +    ```
    +
    +    While this is easy enough to do, it may create problems when using a
    +    non-default repository format because this causes us to overwrite the
    +    repository format version as well as any potential extensions. With the
    +    upcoming "reftable" ref backend the result is that Git would try to
    +    access refs via the "files" backend even though the repository has been
    +    initialized with the "reftable" backend, which will cause failures when
    +    trying to access any refs.
    +
    +    Ideally, we would rewrite the whole test suite to not depend on state
    +    written by previous tests, but that would result in a lot of changes in
    +    this test suite. Instead, we only refactor tests which access the refdb
    +    to be more robust by using their own separate repositories, which allows
    +    us to be more careful and not discard required extensions.
     
         Note that we also have to touch up how the CUSTOM_CONFIG_FILE gets
         accessed. This environment variable contains the relative path to a
2:  fd6dd92c23 = 2:  4359d3ffa8 t1301: mark test for `core.sharedRepository` as reffiles specific
3:  ec90320ff1 = 3:  b72d85df60 t1302: make tests more robust with new extensions
4:  d0d70c3f18 = 4:  1faa8687ae t1419: mark test suite as files-backend specific
5:  066c297189 = 5:  4b95277e20 t5526: break test submodule differently
6:  7b8921817b = 6:  53aea8236d t: mark tests regarding git-pack-refs(1) to be backend specific

base-commit: b50a608ba20348cb3dfc16a696816d51780e3f0f