85 lines
2.7 KiB
Text
85 lines
2.7 KiB
Text
Git version interoperability tests
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==================================
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This directory has interoperability tests for git. Each script is
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similar to the normal test scripts found in t/, but with the added twist
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that two special versions of git, "git.a" and "git.b", are available in
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the PATH. Individual tests can then check the interaction between the
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two versions.
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When you add a feature that handles backwards compatibility between git
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versions, it's encouraged to add a test here to make sure it behaves as
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you expect.
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Running Tests
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-------------
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The easiest way to run tests is to say "make". This runs all
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the tests against their default versions.
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You can run a single test like:
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$ ./i0000-basic.sh
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ok 1 - bare git is forbidden
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ok 2 - git.a version (v1.6.6.3)
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ok 3 - git.b version (v2.11.1)
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# passed all 3 test(s)
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1..3
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Each test contains default versions to run against. You may override
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these by setting `GIT_TEST_VERSION_A` and `GIT_TEST_VERSION_B` in the
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environment. Note that not all combinations will give sensible outcomes
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for all tests (e.g., a test checking for a specific old/new interaction
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may want something "old" enough" and something "new" enough; see
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individual tests for details).
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Version names should be resolvable as revisions in the current
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repository. They will be exported and built as needed using the
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config.mak files found at the root of your working tree.
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The exception is the special version "." which uses the currently-built
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contents of your working tree.
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You can set the following variables (in the environment or in your config.mak):
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GIT_INTEROP_MAKE_OPTS
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Options to pass to `make` when building a git version (e.g.,
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`-j8`).
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You can also pass any command-line options taken by ordinary git tests (e.g.,
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"-v").
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Naming Tests
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------------
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The interop test files are named like:
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iNNNN-short-description.sh
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where N is a decimal digit. The same conventions for choosing NNNN as
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for normal tests apply.
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Writing Tests
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-------------
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An interop test script starts like a normal script, declaring a few
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variables and then including interop-lib.sh (which includes test-lib.sh).
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Besides test_description, you should also set the $VERSION_A and $VERSION_B
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variables to give the default versions to test against. See t0000-basic.sh for
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an example.
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You can then use test_expect_success as usual, with a few differences:
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1. The special commands "git.a" and "git.b" correspond to the
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two versions.
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2. You cannot call a bare "git". This is to prevent accidents where
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you meant "git.a" or "git.b".
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3. The trash directory is _not_ a git repository by default. You
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should create one with the appropriate version of git.
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At the end of the script, call test_done as usual.
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