215 lines
6.1 KiB
Bash
215 lines
6.1 KiB
Bash
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#!/bin/sh
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# This test can give false success if your machine is sufficiently
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# slow or all trials happened to happen on second boundaries.
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test_description='racy split index'
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. ./test-lib.sh
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test_expect_success 'setup' '
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# Only split the index when the test explicitly says so.
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sane_unset GIT_TEST_SPLIT_INDEX &&
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git config splitIndex.maxPercentChange 100 &&
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echo "cached content" >racy-file &&
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git add racy-file &&
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git commit -m initial &&
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echo something >other-file &&
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# No raciness with this file.
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test-tool chmtime =-20 other-file &&
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echo "+cached content" >expect
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'
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check_cached_diff () {
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git diff-index --patch --cached $EMPTY_TREE racy-file >diff &&
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tail -1 diff >actual &&
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test_cmp expect actual
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}
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trials="0 1 2 3 4"
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for trial in $trials
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do
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test_expect_success "split the index while adding a racily clean file #$trial" '
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rm -f .git/index .git/sharedindex.* &&
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# The next three commands must be run within the same
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# second (so both writes to racy-file result in the same
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# mtime) to create the interesting racy situation.
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echo "cached content" >racy-file &&
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# Update and split the index. The cache entry of
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# racy-file will be stored only in the shared index.
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git update-index --split-index --add racy-file &&
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# File size must stay the same.
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echo "dirty worktree" >racy-file &&
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# Subsequent git commands should notice that racy-file
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# and the split index have the same mtime, and check
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# the content of the file to see if it is actually
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# clean.
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check_cached_diff
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'
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done
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for trial in $trials
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do
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test_expect_success "add a racily clean file to an already split index #$trial" '
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rm -f .git/index .git/sharedindex.* &&
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git update-index --split-index &&
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# The next three commands must be run within the same
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# second.
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echo "cached content" >racy-file &&
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# Update the split index. The cache entry of racy-file
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# will be stored only in the split index.
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git update-index --add racy-file &&
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# File size must stay the same.
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echo "dirty worktree" >racy-file &&
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# Subsequent git commands should notice that racy-file
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# and the split index have the same mtime, and check
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# the content of the file to see if it is actually
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# clean.
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check_cached_diff
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'
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done
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for trial in $trials
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do
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test_expect_success "split the index when the index contains a racily clean cache entry #$trial" '
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rm -f .git/index .git/sharedindex.* &&
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# The next three commands must be run within the same
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# second.
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echo "cached content" >racy-file &&
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git update-index --add racy-file &&
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# File size must stay the same.
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echo "dirty worktree" >racy-file &&
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# Now wait a bit to ensure that the split index written
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# below will get a more recent mtime than racy-file.
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sleep 1 &&
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# Update and split the index when the index contains
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# the racily clean cache entry of racy-file.
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# A corresponding replacement cache entry with smudged
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# stat data should be added to the new split index.
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git update-index --split-index --add other-file &&
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# Subsequent git commands should notice the smudged
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# stat data in the replacement cache entry and that it
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# doesnt match with the file the worktree.
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check_cached_diff
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'
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done
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for trial in $trials
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do
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test_expect_success "update the split index when it contains a new racily clean cache entry #$trial" '
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rm -f .git/index .git/sharedindex.* &&
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git update-index --split-index &&
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# The next three commands must be run within the same
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# second.
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echo "cached content" >racy-file &&
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# Update the split index. The cache entry of racy-file
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# will be stored only in the split index.
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git update-index --add racy-file &&
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# File size must stay the same.
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echo "dirty worktree" >racy-file &&
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# Now wait a bit to ensure that the split index written
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# below will get a more recent mtime than racy-file.
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sleep 1 &&
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# Update the split index when the racily clean cache
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# entry of racy-file is only stored in the split index.
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# An updated cache entry with smudged stat data should
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# be added to the new split index.
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git update-index --add other-file &&
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# Subsequent git commands should notice the smudged
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# stat data.
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check_cached_diff
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'
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done
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for trial in $trials
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do
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test_expect_success "update the split index when a racily clean cache entry is stored only in the shared index #$trial" '
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rm -f .git/index .git/sharedindex.* &&
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# The next three commands must be run within the same
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# second.
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echo "cached content" >racy-file &&
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# Update and split the index. The cache entry of
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# racy-file will be stored only in the shared index.
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git update-index --split-index --add racy-file &&
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# File size must stay the same.
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echo "dirty worktree" >racy-file &&
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# Now wait a bit to ensure that the split index written
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# below will get a more recent mtime than racy-file.
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sleep 1 &&
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# Update the split index when the racily clean cache
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# entry of racy-file is only stored in the shared index.
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# A corresponding replacement cache entry with smudged
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# stat data should be added to the new split index.
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git update-index --add other-file &&
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# Subsequent git commands should notice the smudged
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# stat data.
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check_cached_diff
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'
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done
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for trial in $trials
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do
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test_expect_success "update the split index after unpack trees() copied a racily clean cache entry from the shared index #$trial" '
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rm -f .git/index .git/sharedindex.* &&
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# The next three commands must be run within the same
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# second.
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echo "cached content" >racy-file &&
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# Update and split the index. The cache entry of
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# racy-file will be stored only in the shared index.
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git update-index --split-index --add racy-file &&
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# File size must stay the same.
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echo "dirty worktree" >racy-file &&
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# Now wait a bit to ensure that the split index written
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# below will get a more recent mtime than racy-file.
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sleep 1 &&
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# Update the split index after unpack_trees() copied the
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# racily clean cache entry of racy-file from the shared
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# index. A corresponding replacement cache entry
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# with smudged stat data should be added to the new
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# split index.
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git read-tree -m HEAD &&
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# Subsequent git commands should notice the smudged
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# stat data.
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check_cached_diff
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'
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done
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test_done
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