[PATCH/RFC 5/7] contrib/subtree: Make each test self-contained

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Signed-off-by: Techlive Zheng <techlivezheng@xxxxxxxxx>
---
 contrib/subtree/t/t7900-subtree.sh | 865 ++++++++++++++++++++++++++-----------
 1 file changed, 614 insertions(+), 251 deletions(-)

diff --git a/contrib/subtree/t/t7900-subtree.sh b/contrib/subtree/t/t7900-subtree.sh
index bb4fd1f..ece2064 100755
--- a/contrib/subtree/t/t7900-subtree.sh
+++ b/contrib/subtree/t/t7900-subtree.sh
@@ -12,12 +12,6 @@ export TEST_DIRECTORY=$(pwd)/../../../t
 
 . ../../../t/test-lib.sh
 
-create()
-{
-    echo "$1" >"$1"
-    git add "$1"
-}
-
 fixnl()
 {
     t=""
@@ -37,11 +31,6 @@ multiline()
     done
 }
 
-undo()
-{
-    git reset --hard HEAD~
-}
-
 test_equal()
 {
     test_debug 'echo'
@@ -78,373 +67,746 @@ join_commits()
     echo "$commit $all"
 }
 
+test_create_commit() (
+    repo=$1
+    commit=$2
+    cd "$repo"
+    mkdir -p "$(dirname "$commit")"
+    echo "$commit" > "$commit"
+    git add "$commit"
+    git commit -m "$commit"
+)
+
 last_commit_message()
 {
     git log --pretty=format:%s -1
 }
 
-test_expect_success 'init subproj' '
-        test_create_repo subproj
-'
-
-# To the subproject!
-cd subproj
-
-test_expect_success 'add sub1' '
-        create sub1 &&
-        git commit -m "sub1" &&
-        git branch sub1 &&
-        git branch -m master subproj
-'
-
-test_expect_success 'add sub2' '
-        create sub2 &&
-        git commit -m "sub2" &&
-        git branch sub2
-'
-
-test_expect_success 'add sub3' '
-        create sub3 &&
-        git commit -m "sub3" &&
-        git branch sub3
-'
-
-# Back to mainline
-cd ..
-
-test_expect_success 'add main4' '
-        create main4 &&
-        git commit -m "main4" &&
-        git branch -m master mainline &&
-        git branch init
-'
-
-test_expect_success 'fetch subproj history' '
-        git fetch ./subproj sub1 &&
-        git branch sub1 FETCH_HEAD
-'
+#
+# Tests for 'git subtree add'
+#
 
 test_expect_success 'no pull from non-existant subtree' '
-        test_must_fail git subtree pull --prefix=subdir ./subproj sub1
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        test_must_fail git subtree pull --prefix=subdir ./subproj master
+    )
 '
 
 test_expect_success 'no merge from non-existant subtree' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
         test_must_fail git subtree merge --prefix=subdir FETCH_HEAD
+    )
 '
 
 test_expect_success 'add subproj as subtree into subdir/ with --prefix' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
         git subtree add --prefix=subdir FETCH_HEAD &&
-        test_equal "$(last_commit_message)" "Add '\''subdir/'\'' from commit '\''$(git rev-parse FETCH_HEAD)'\''" &&
-        undo
+        test_equal "$(last_commit_message)" "Add '\''subdir/'\'' from commit '\''$(git rev-parse FETCH_HEAD)'\''"
+    )
 '
 
 test_expect_success 'add subproj as subtree into subdir/ with --prefix and --message' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
         git subtree add --prefix=subdir --message="Added subproject" FETCH_HEAD &&
-        test_equal "$(last_commit_message)" "Added subproject" &&
-        undo
+        test_equal "$(last_commit_message)" "Added subproject"
+    )
 '
 
 test_expect_success 'add subproj as subtree into subdir/ with --prefix as -P and --message as -m' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
         git subtree add -P subdir -m "Added subproject" FETCH_HEAD &&
-        test_equal "$(last_commit_message)" "Added subproject" &&
-        undo
+        test_equal "$(last_commit_message)" "Added subproject"
+    )
 '
 
 test_expect_success 'add subproj as subtree into subdir/ with --squash and --prefix and --message' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
         git subtree add --prefix=subdir --message="Added subproject with squash" --squash FETCH_HEAD &&
-        test_equal "$(last_commit_message)" "Added subproject with squash" &&
-        undo
+        test_equal "$(last_commit_message)" "Added subproject with squash"
+    )
 '
 
 test_expect_success 'merge the added subproj again, should do nothing' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
         git subtree add --prefix=subdir FETCH_HEAD &&
         # this shouldn not actually do anything, since FETCH_HEAD
         # is already a parent
         git merge -s ours -m "merge -s -ours" FETCH_HEAD
+    )
 '
 
-test_expect_success 'add main-sub5' '
-        create subdir/main-sub5 &&
-        git commit -m "main-sub5"
-'
-
-test_expect_success 'add main6' '
-        create main6 &&
-        git commit -m "main6 boring"
-'
-
-test_expect_success 'add main-sub7' '
-        create subdir/main-sub7 &&
-        git commit -m "main-sub7"
-'
-
-test_expect_success 'fetch new subproj history' '
-        git fetch ./subproj sub2 &&
-        git branch sub2 FETCH_HEAD
-'
+#
+# Tests for 'git subtree merge'
+#
 
 test_expect_success 'merge new subproj history into subdir/ with --prefix' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
         git subtree merge --prefix=subdir FETCH_HEAD &&
-        test_equal "$(last_commit_message)" "Merge commit '\''$(git rev-parse FETCH_HEAD)'\'' into mainline" &&
-        undo
+        test_equal "$(last_commit_message)" "Merge commit '\''$(git rev-parse FETCH_HEAD)'\''"
+    )
 '
 
 test_expect_success 'merge new subproj history into subdir/ with --prefix and --message' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
         git subtree merge --prefix=subdir --message="Merged changes from subproject" FETCH_HEAD &&
-        test_equal "$(last_commit_message)" "Merged changes from subproject" &&
-        undo
+        test_equal "$(last_commit_message)" "Merged changes from subproject"
+    )
 '
 
 test_expect_success 'merge new subproj history into subdir/ with --squash and --prefix and --message' '
+    test_create_repo "$test_count/subproj" &&
+    test_create_repo "$test_count" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
         git subtree merge --prefix=subdir --message="Merged changes from subproject using squash" --squash FETCH_HEAD &&
-        test_equal "$(last_commit_message)" "Merged changes from subproject using squash" &&
-        undo
+        test_equal "$(last_commit_message)" "Merged changes from subproject using squash"
+    )
 '
 
-test_expect_success 'merge new subproj history into subdir/' '
-        git subtree merge --prefix=subdir FETCH_HEAD &&
-        git branch pre-split
-'
+#
+# Tests for 'git subtree split'
+#
 
 test_expect_success 'split requires option --prefix' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD &&
         echo "You must provide the --prefix option." > expected &&
         test_must_fail git subtree split > actual 2>&1 &&
         test_debug "echo -n expected: " &&
         test_debug "cat expected" &&
         test_debug "echo -n actual: " &&
         test_debug "cat actual" &&
-        test_cmp expected actual &&
-        rm -f expected actual
+        test_cmp expected actual
+    )
 '
 
 test_expect_success 'split requires path given by option --prefix must exist' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD &&
         echo "'\''non-existent-directory'\'' does not exist; use '\''git subtree add'\''" > expected &&
         test_must_fail git subtree split --prefix=non-existent-directory > actual 2>&1 &&
         test_debug "echo -n expected: " &&
         test_debug "cat expected" &&
         test_debug "echo -n actual: " &&
         test_debug "cat actual" &&
-        test_cmp expected actual &&
-        rm -f expected actual
+        test_cmp expected actual
+    )
 '
 
 test_expect_success 'split subdir/ with --rejoin' '
-        spl1=$(git subtree split --prefix=subdir --annotate="*") &&
-        git branch spl1 "$spl1" &&
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub1 &&
+    test_create_commit "$test_count" main2 &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    test_create_commit "$test_count" subdir/main-sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree merge --prefix=subdir FETCH_HEAD &&
+        split_hash=$(git subtree split --prefix=subdir --annotate="*") &&
         git subtree split --prefix=subdir --annotate="*" --rejoin &&
-        test_equal "$(last_commit_message)" "Split '\''subdir/'\'' into commit '\''$spl1'\''" &&
-        undo
+        test_equal "$(last_commit_message)" "Split '\''subdir/'\'' into commit '\''$split_hash'\''"
+    )
 '
 
 test_expect_success 'split subdir/ with --rejoin and --message' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub1 &&
+    test_create_commit "$test_count" main2 &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    test_create_commit "$test_count" subdir/main-sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree merge --prefix=subdir FETCH_HEAD &&
         git subtree split --prefix=subdir --message="Split & rejoin" --annotate="*" --rejoin &&
-        test_equal "$(last_commit_message)" "Split & rejoin" &&
-        undo
+        test_equal "$(last_commit_message)" "Split & rejoin"
+    )
 '
 
 test_expect_success 'split subdir/ with --branch' '
-        spl1=$(git subtree split --prefix=subdir --message="Split & rejoin" --annotate="*" --rejoin) &&
-        undo &&
-        git subtree split --prefix=subdir --annotate="*" --branch splitbr1 &&
-        test_equal "$(git rev-parse splitbr1)" "$spl1"
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub1 &&
+    test_create_commit "$test_count" main2 &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    test_create_commit "$test_count" subdir/main-sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree merge --prefix=subdir FETCH_HEAD &&
+        split_hash=$(git subtree split --prefix=subdir --annotate="*") &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br &&
+        test_equal "$(git rev-parse subproj-br)" "$split_hash"
+    )
 '
 
 test_expect_success 'split subdir/ with --branch for an existing branch' '
-        spl1=$(git subtree split --prefix=subdir --annotate="*" --message="Split & rejoin" --rejoin) &&
-        undo &&
-        git branch splitbr2 sub1 &&
-        git subtree split --prefix=subdir --annotate="*" --branch splitbr2 &&
-        test_equal "$(git rev-parse splitbr2)" "$spl1"
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git branch subproj-br FETCH_HEAD &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub1 &&
+    test_create_commit "$test_count" main2 &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    test_create_commit "$test_count" subdir/main-sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree merge --prefix=subdir FETCH_HEAD &&
+        split_hash=$(git subtree split --prefix=subdir --annotate="*") &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br &&
+        test_equal "$(git rev-parse subproj-br)" "$split_hash"
+    )
 '
 
 test_expect_success 'split subdir/ with --branch for an incompatible branch' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git branch init HEAD &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub1 &&
+    test_create_commit "$test_count" main2 &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    test_create_commit "$test_count" subdir/main-sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree merge --prefix=subdir FETCH_HEAD &&
         test_must_fail git subtree split --prefix=subdir --branch init
+    )
 '
 
-test_expect_success 'split and rejoin' '
-        git subtree split --prefix=subdir --annotate="*" --rejoin
-'
-
-test_expect_success 'add main-sub8' '
-        create subdir/main-sub8 &&
-        git commit -m "main-sub8"
-'
-
-# To the subproject!
-cd ./subproj
-
-test_expect_success 'merge split into subproj' '
-        git fetch .. spl1 &&
-        git branch spl1 FETCH_HEAD &&
-        git merge FETCH_HEAD
-'
-
-test_expect_success 'add sub9' '
-        create sub9 &&
-        git commit -m "sub9"
-'
-
-# Back to mainline
-cd ..
-
-test_expect_success 'split for sub8' '
-        spl2=$(git subtree split --prefix=subdir/ --annotate="*" --rejoin) &&
-        git branch spl2 "$spl2"
-'
-
-test_expect_success 'add main-sub10' '
-        create subdir/main-sub10 &&
-        git commit -m "main-sub10"
-'
-
-test_expect_success 'split for sub10' '
-        spl3=$(git subtree split --prefix=subdir --annotate="*" --rejoin) &&
-        git branch spl3 "$spl3"
-'
-
-# To the subproject!
-cd ./subproj
-
-test_expect_success 'merge split into subproj' '
-        git fetch .. spl3 &&
-        git branch spl3 FETCH_HEAD &&
-        git merge FETCH_HEAD &&
-        git branch subproj-merge-spl3
-'
-
-chkm="main4 main6"
-chkms="main-sub10 main-sub5 main-sub7 main-sub8"
-chkms_sub=$(echo $chkms | multiline | sed 's,^,subdir/,' | fixnl)
-chks="sub1 sub2 sub3 sub9"
-chks_sub=$(echo $chks | multiline | sed 's,^,subdir/,' | fixnl)
+#
+# Validity checking
+#
 
 test_expect_success 'make sure exactly the right set of files ends up in the subproj' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub1 &&
+    test_create_commit "$test_count" main2 &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    test_create_commit "$test_count" subdir/main-sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree merge --prefix=subdir FETCH_HEAD &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    test_create_commit "$test_count/subproj" sub3 &&
+    test_create_commit "$test_count" subdir/main-sub3 &&
+    (
+        cd "$test_count/subproj" &&
+        git fetch .. subproj-br && git merge FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count/subproj" sub4 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub4 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    (
+        cd "$test_count/subproj" &&
+        git fetch .. subproj-br && git merge FETCH_HEAD &&
+
+        chks="sub1 sub2 sub3 sub4" &&
+        chks_sub=$(echo $chks | multiline | sed '\''s,^,subdir/,'\'' | fixnl) &&
+        chkms="main-sub1 main-sub2 main-sub3 main-sub4" &&
+        chkms_sub=$(echo $chkms | multiline | sed '\''s,^,subdir/,'\'' | fixnl) &&
+
         subfiles=$(git ls-files | fixnl) &&
         test_equal "$subfiles" "$chkms $chks"
+    )
 '
 
 test_expect_success 'make sure the subproj *only* contains commits that affect the subdir' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub1 &&
+    test_create_commit "$test_count" main2 &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    test_create_commit "$test_count" subdir/main-sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree merge --prefix=subdir FETCH_HEAD &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    test_create_commit "$test_count/subproj" sub3 &&
+    test_create_commit "$test_count" subdir/main-sub3 &&
+    (
+        cd "$test_count/subproj" &&
+        git fetch .. subproj-br && git merge FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count/subproj" sub4 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub4 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    (
+        cd "$test_count/subproj" &&
+        git fetch .. subproj-br && git merge FETCH_HEAD &&
+
+        chks="sub1 sub2 sub3 sub4" &&
+        chks_sub=$(echo $chks | multiline | sed '\''s,^,subdir/,'\'' | fixnl) &&
+        chkms="main-sub1 main-sub2 main-sub3 main-sub4" &&
+        chkms_sub=$(echo $chkms | multiline | sed '\''s,^,subdir/,'\'' | fixnl) &&
+
         allchanges=$(git log --name-only --pretty=format:"" | sort | fixnl) &&
         test_equal "$allchanges" "$chkms $chks"
-'
-
-# Back to mainline
-cd ..
-
-test_expect_success 'pull from subproj' '
-        git fetch ./subproj subproj-merge-spl3 &&
-        git branch subproj-merge-spl3 FETCH_HEAD &&
-        git subtree pull --prefix=subdir ./subproj subproj-merge-spl3
+    )
 '
 
 test_expect_success 'make sure exactly the right set of files ends up in the mainline' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub1 &&
+    test_create_commit "$test_count" main2 &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    test_create_commit "$test_count" subdir/main-sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree merge --prefix=subdir FETCH_HEAD &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    test_create_commit "$test_count/subproj" sub3 &&
+    test_create_commit "$test_count" subdir/main-sub3 &&
+    (
+        cd "$test_count/subproj" &&
+        git fetch .. subproj-br && git merge FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count/subproj" sub4 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub4 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    (
+        cd "$test_count/subproj" &&
+        git fetch .. subproj-br && git merge FETCH_HEAD
+    ) &&
+    (
+        cd "$test_count" &&
+        git subtree pull --prefix=subdir ./subproj master &&
+
+        chkm="main1 main2" &&
+        chks="sub1 sub2 sub3 sub4" &&
+        chks_sub=$(echo $chks | multiline | sed '\''s,^,subdir/,'\'' | fixnl) &&
+        chkms="main-sub1 main-sub2 main-sub3 main-sub4" &&
+        chkms_sub=$(echo $chkms | multiline | sed '\''s,^,subdir/,'\'' | fixnl) &&
+
         mainfiles=$(git ls-files | fixnl) &&
         test_equal "$mainfiles" "$chkm $chkms_sub $chks_sub"
+    )
 '
 
 test_expect_success 'make sure each filename changed exactly once in the entire history' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub1 &&
+    test_create_commit "$test_count" main2 &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    test_create_commit "$test_count" subdir/main-sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree merge --prefix=subdir FETCH_HEAD &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    test_create_commit "$test_count/subproj" sub3 &&
+    test_create_commit "$test_count" subdir/main-sub3 &&
+    (
+        cd "$test_count/subproj" &&
+        git fetch .. subproj-br && git merge FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count/subproj" sub4 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub4 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    (
+        cd "$test_count/subproj" &&
+        git fetch .. subproj-br && git merge FETCH_HEAD
+    ) &&
+    (
+        cd "$test_count" &&
+        git subtree pull --prefix=subdir ./subproj master &&
+
+        chkm="main1 main2" &&
+        chks="sub1 sub2 sub3 sub4" &&
+        chks_sub=$(echo $chks | multiline | sed '\''s,^,subdir/,'\'' | fixnl) &&
+        chkms="main-sub1 main-sub2 main-sub3 main-sub4" &&
+        chkms_sub=$(echo $chkms | multiline | sed '\''s,^,subdir/,'\'' | fixnl) &&
+
         # main-sub?? and /subdir/main-sub?? both change, because those are the
         # changes that were split into their own history.  And subdir/sub?? never
         # change, since they were *only* changed in the subtree branch.
         allchanges=$(git log --name-only --pretty=format:"" | sort | fixnl) &&
         test_equal "$allchanges" "$(echo $chkms $chkm $chks $chkms_sub | multiline | sort | fixnl)"
+    )
 '
 
 test_expect_success 'make sure the --rejoin commits never make it into subproj' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub1 &&
+    test_create_commit "$test_count" main2 &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    test_create_commit "$test_count" subdir/main-sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree merge --prefix=subdir FETCH_HEAD &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    test_create_commit "$test_count/subproj" sub3 &&
+    test_create_commit "$test_count" subdir/main-sub3 &&
+    (
+        cd "$test_count/subproj" &&
+        git fetch .. subproj-br && git merge FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count/subproj" sub4 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub4 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    (
+        cd "$test_count/subproj" &&
+        git fetch .. subproj-br && git merge FETCH_HEAD
+    ) &&
+    (
+        cd "$test_count" &&
+        git subtree pull --prefix=subdir ./subproj master &&
+
         test_equal "$(git log --pretty=format:"%s" HEAD^2 | grep -i split)" ""
+    )
 '
 
 test_expect_success 'make sure no "git subtree" tagged commits make it into subproj' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub1 &&
+    test_create_commit "$test_count" main2 &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    test_create_commit "$test_count" subdir/main-sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree merge --prefix=subdir FETCH_HEAD &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    test_create_commit "$test_count/subproj" sub3 &&
+    test_create_commit "$test_count" subdir/main-sub3 &&
+    (
+        cd "$test_count/subproj" &&
+        git fetch .. subproj-br && git merge FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count/subproj" sub4 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub4 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --annotate="*" --branch subproj-br --rejoin
+    ) &&
+    (
+        cd "$test_count/subproj" &&
+        git fetch .. subproj-br && git merge FETCH_HEAD
+    ) &&
+    (
+        cd "$test_count" &&
+        git subtree pull --prefix=subdir ./subproj master &&
+
         # They are meaningless to subproj since one side of the merge refers to the mainline
         test_equal "$(git log --pretty=format:"%s%n%b" HEAD^2 | grep "git-subtree.*:")" ""
+    )
 '
 
-# prepare second pair of repositories
-mkdir test2
-cd test2
-
-test_expect_success 'init main' '
-        test_create_repo main
-'
-
-cd main
-
-test_expect_success 'add main1' '
-        create main1 &&
-        git commit -m "main1"
-'
-
-cd ..
-
-test_expect_success 'init sub' '
-        test_create_repo sub
-'
-
-cd sub
-
-test_expect_success 'add sub2' '
-        create sub2 &&
-        git commit -m "sub2"
-'
-
-cd ../main
-
-# check if split can find proper base without --onto
-
-test_expect_success 'add sub as subdir in main' '
-        git fetch ../sub master &&
-        git branch sub2 FETCH_HEAD &&
-        git subtree add --prefix=subdir sub2
-'
-
-cd ../sub
-
-test_expect_success 'add sub3' '
-        create sub3 &&
-        git commit -m "sub3"
-'
-
-cd ../main
-
-test_expect_success 'merge from sub' '
-        git fetch ../sub master &&
-        git branch sub3 FETCH_HEAD &&
-        git subtree merge --prefix=subdir sub3
-'
-
-test_expect_success 'add main-sub4' '
-        create subdir/main-sub4 &&
-        git commit -m "main-sub4"
-'
-
-test_expect_success 'split for main-sub4 without --onto' '
-        git subtree split --prefix=subdir --branch mainsub4
-'
-
-# at this point, the new commit parent should be sub3 if it is not,
-# something went wrong (the "newparent" of "master~" commit should
-# have been sub3, but it was not, because its cache was not set to
-# itself)
-
-test_expect_success 'check that the commit parent is sub3' '
-        test_equal "$(git log --pretty=format:%P -1 mainsub4)" "$(git rev-parse sub3)"
-'
+#
+# A new set of tests
+#
 
-test_expect_success 'add main-sub5' '
-        mkdir subdir2 &&
-        create subdir2/main-sub5 &&
-        git commit -m "main-sub5"
-'
+test_expect_success 'make sure "git subtree split" find the correct parent' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git branch subproj-ref FETCH_HEAD &&
+        git subtree merge --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub1 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --branch subproj-br &&
+
+        # at this point, the new commit parent should be subproj-ref, if it is
+        # not, something went wrong (the "newparent" of "master~" commit should
+        # have been sub2, but it was not, because its cache was not set to
+        # itself)
+        test_equal "$(git log --pretty=format:%P -1 subproj-br)" "$(git rev-parse subproj-ref)"
+    )
+'
+
+test_expect_success 'split a new subtree without --onto option' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree add --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree merge --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub1 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --branch subproj-br
+    ) &&
+    test_create_commit "$test_count" subdir2/main-sub2 &&
+    (
+        cd "$test_count" &&
 
-test_expect_success 'split for main-sub5 without --onto' '
         # also test that we still can split out an entirely new subtree
         # if the parent of the first commit in the tree is not empty,
         # then the new subtree has accidently been attached to something
-        git subtree split --prefix=subdir2 --branch mainsub5 &&
-        test_equal "$(git log --pretty=format:%P -1 mainsub5)" ""
+        git subtree split --prefix=subdir2 --branch subproj2-br &&
+        test_equal "$(git log --pretty=format:%P -1 subproj2-br)" ""
+    )
 '
 
 test_expect_success 'verify one file change per commit' '
+    test_create_repo "$test_count" &&
+    test_create_repo "$test_count/subproj" &&
+    test_create_commit "$test_count" main1 &&
+    test_create_commit "$test_count/subproj" sub1 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git branch sub1 FETCH_HEAD &&
+        git subtree add --prefix=subdir sub1
+    ) &&
+    test_create_commit "$test_count/subproj" sub2 &&
+    (
+        cd "$test_count" &&
+        git fetch ./subproj master &&
+        git subtree merge --prefix=subdir FETCH_HEAD
+    ) &&
+    test_create_commit "$test_count" subdir/main-sub1 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir --branch subproj-br
+    ) &&
+    test_create_commit "$test_count" subdir2/main-sub2 &&
+    (
+        cd "$test_count" &&
+        git subtree split --prefix=subdir2 --branch subproj2-br &&
+
         x= &&
         git log --pretty=format:"commit: %H" | join_commits |
         (
@@ -457,6 +819,7 @@ test_expect_success 'verify one file change per commit' '
             done
             test_equal "$x" 1
         )
+    )
 '
 
 test_done
-- 
1.8.1

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