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git/t/t4300-merge-tree.sh
SZEDER Gábor 1c5e94f459 tests: use 'test_must_be_empty' instead of 'test_cmp <empty> <out>' 
Using 'test_must_be_empty' is shorter and more idiomatic than

  >empty &&
  test_cmp empty out

as it saves the creation of an empty file.  Furthermore, sometimes the
expected empty file doesn't have such a descriptive name like 'empty',
and its creation is far away from the place where it's finally used
for comparison (e.g. in 't7600-merge.sh', where two expected empty
files are created in the 'setup' test, but are used only about 500
lines later).

These cases were found by instrumenting 'test_cmp' to error out the
test script when it's used to compare empty files, and then converted
manually.

Note that even after this patch there still remain a lot of cases
where we use 'test_cmp' to check empty files:

  - Sometimes the expected output is not hard-coded in the test, but
    'test_cmp' is used to ensure that two similar git commands produce
    the same output, and that output happens to be empty, e.g. the
    test 'submodule update --merge  - ignores --merge  for new
    submodules' in 't7406-submodule-update.sh'.

  - Repetitive common tasks, including preparing the expected results
    and running 'test_cmp', are often extracted into a helper
    function, and some of this helper's callsites expect no output.

  - For the same reason as above, the whole 'test_expect_success'
    block is within a helper function, e.g. in 't3070-wildmatch.sh'.

  - Or 'test_cmp' is invoked in a loop, e.g. the test 'cvs update
    (-p)' in 't9400-git-cvsserver-server.sh'.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-21 11:48:36 -07:00

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#!/bin/sh
#
# Copyright (c) 2010 Will Palmer
#
test_description='git merge-tree'
. ./test-lib.sh
test_expect_success setup '
test_commit "initial" "initial-file" "initial"
'
test_expect_success 'file add A, !B' '
cat >expected <<\EXPECTED &&
added in remote
their 100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
@@ -0,0 +1 @@
+AAA
EXPECTED
git reset --hard initial &&
test_commit "add-a-not-b" "ONE" "AAA" &&
git merge-tree initial initial add-a-not-b >actual &&
test_cmp expected actual
'
test_expect_success 'file add !A, B' '
git reset --hard initial &&
test_commit "add-not-a-b" "ONE" "AAA" &&
git merge-tree initial add-not-a-b initial >actual &&
test_must_be_empty actual
'
test_expect_success 'file add A, B (same)' '
git reset --hard initial &&
test_commit "add-a-b-same-A" "ONE" "AAA" &&
git reset --hard initial &&
test_commit "add-a-b-same-B" "ONE" "AAA" &&
git merge-tree initial add-a-b-same-A add-a-b-same-B >actual &&
test_must_be_empty actual
'
test_expect_success 'file add A, B (different)' '
cat >expected <<\EXPECTED &&
added in both
our 100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
their 100644 ba629238ca89489f2b350e196ca445e09d8bb834 ONE
@@ -1 +1,5 @@
+<<<<<<< .our
AAA
+=======
+BBB
+>>>>>>> .their
EXPECTED
git reset --hard initial &&
test_commit "add-a-b-diff-A" "ONE" "AAA" &&
git reset --hard initial &&
test_commit "add-a-b-diff-B" "ONE" "BBB" &&
git merge-tree initial add-a-b-diff-A add-a-b-diff-B >actual &&
test_cmp expected actual
'
test_expect_success 'file change A, !B' '
git reset --hard initial &&
test_commit "change-a-not-b" "initial-file" "BBB" &&
git merge-tree initial change-a-not-b initial >actual &&
test_must_be_empty actual
'
test_expect_success 'file change !A, B' '
cat >expected <<\EXPECTED &&
merged
result 100644 ba629238ca89489f2b350e196ca445e09d8bb834 initial-file
our 100644 e79c5e8f964493290a409888d5413a737e8e5dd5 initial-file
@@ -1 +1 @@
-initial
+BBB
EXPECTED
git reset --hard initial &&
test_commit "change-not-a-b" "initial-file" "BBB" &&
git merge-tree initial initial change-not-a-b >actual &&
test_cmp expected actual
'
test_expect_success 'file change A, B (same)' '
git reset --hard initial &&
test_commit "change-a-b-same-A" "initial-file" "AAA" &&
git reset --hard initial &&
test_commit "change-a-b-same-B" "initial-file" "AAA" &&
git merge-tree initial change-a-b-same-A change-a-b-same-B >actual &&
test_must_be_empty actual
'
test_expect_success 'file change A, B (different)' '
cat >expected <<\EXPECTED &&
changed in both
base 100644 e79c5e8f964493290a409888d5413a737e8e5dd5 initial-file
our 100644 43d5a8ed6ef6c00ff775008633f95787d088285d initial-file
their 100644 ba629238ca89489f2b350e196ca445e09d8bb834 initial-file
@@ -1 +1,5 @@
+<<<<<<< .our
AAA
+=======
+BBB
+>>>>>>> .their
EXPECTED
git reset --hard initial &&
test_commit "change-a-b-diff-A" "initial-file" "AAA" &&
git reset --hard initial &&
test_commit "change-a-b-diff-B" "initial-file" "BBB" &&
git merge-tree initial change-a-b-diff-A change-a-b-diff-B >actual &&
test_cmp expected actual
'
test_expect_success 'file change A, B (mixed)' '
cat >expected <<\EXPECTED &&
changed in both
base 100644 f4f1f998c7776568c4ff38f516d77fef9399b5a7 ONE
our 100644 af14c2c3475337c73759d561ef70b59e5c731176 ONE
their 100644 372d761493f524d44d59bd24700c3bdf914c973c ONE
@@ -7,7 +7,11 @@
AAA
AAA
AAA
+<<<<<<< .our
BBB
+=======
+CCC
+>>>>>>> .their
AAA
AAA
AAA
EXPECTED
git reset --hard initial &&
test_commit "change-a-b-mix-base" "ONE" "
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA" &&
test_commit "change-a-b-mix-A" "ONE" \
"$(sed -e "1{s/AAA/BBB/;}" -e "10{s/AAA/BBB/;}" <ONE)" &&
git reset --hard change-a-b-mix-base &&
test_commit "change-a-b-mix-B" "ONE" \
"$(sed -e "1{s/AAA/BBB/;}" -e "10{s/AAA/CCC/;}" <ONE)" &&
git merge-tree change-a-b-mix-base change-a-b-mix-A change-a-b-mix-B \
>actual &&
test_cmp expected actual
'
test_expect_success 'file remove A, !B' '
git reset --hard initial &&
test_commit "rm-a-not-b-base" "ONE" "AAA" &&
git rm ONE &&
git commit -m "rm-a-not-b" &&
git tag "rm-a-not-b" &&
git merge-tree rm-a-not-b-base rm-a-not-b rm-a-not-b-base >actual &&
test_must_be_empty actual
'
test_expect_success 'file remove !A, B' '
cat >expected <<\EXPECTED &&
removed in remote
base 100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
our 100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
@@ -1 +0,0 @@
-AAA
EXPECTED
git reset --hard initial &&
test_commit "rm-not-a-b-base" "ONE" "AAA" &&
git rm ONE &&
git commit -m "rm-not-a-b" &&
git tag "rm-not-a-b" &&
git merge-tree rm-a-not-b-base rm-a-not-b-base rm-a-not-b >actual &&
test_cmp expected actual
'
test_expect_success 'file remove A, B (same)' '
git reset --hard initial &&
test_commit "rm-a-b-base" "ONE" "AAA" &&
git rm ONE &&
git commit -m "rm-a-b" &&
git tag "rm-a-b" &&
git merge-tree rm-a-b-base rm-a-b rm-a-b >actual &&
test_must_be_empty actual
'
test_expect_success 'file change A, remove B' '
cat >expected <<\EXPECTED &&
removed in remote
base 100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
our 100644 ba629238ca89489f2b350e196ca445e09d8bb834 ONE
@@ -1 +0,0 @@
-BBB
EXPECTED
git reset --hard initial &&
test_commit "change-a-rm-b-base" "ONE" "AAA" &&
test_commit "change-a-rm-b-A" "ONE" "BBB" &&
git reset --hard change-a-rm-b-base &&
git rm ONE &&
git commit -m "change-a-rm-b-B" &&
git tag "change-a-rm-b-B" &&
git merge-tree change-a-rm-b-base change-a-rm-b-A change-a-rm-b-B \
>actual &&
test_cmp expected actual
'
test_expect_success 'file remove A, change B' '
cat >expected <<\EXPECTED &&
removed in local
base 100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
their 100644 ba629238ca89489f2b350e196ca445e09d8bb834 ONE
EXPECTED
git reset --hard initial &&
test_commit "rm-a-change-b-base" "ONE" "AAA" &&
git rm ONE &&
git commit -m "rm-a-change-b-A" &&
git tag "rm-a-change-b-A" &&
git reset --hard rm-a-change-b-base &&
test_commit "rm-a-change-b-B" "ONE" "BBB" &&
git merge-tree rm-a-change-b-base rm-a-change-b-A rm-a-change-b-B \
>actual &&
test_cmp expected actual
'
test_expect_success 'tree add A, B (same)' '
git reset --hard initial &&
mkdir sub &&
test_commit "add sub/file" "sub/file" "file" add-tree-A &&
git merge-tree initial add-tree-A add-tree-A >actual &&
test_must_be_empty actual
'
test_expect_success 'tree add A, B (different)' '
cat >expect <<-\EOF &&
added in both
our 100644 43d5a8ed6ef6c00ff775008633f95787d088285d sub/file
their 100644 ba629238ca89489f2b350e196ca445e09d8bb834 sub/file
@@ -1 +1,5 @@
+<<<<<<< .our
AAA
+=======
+BBB
+>>>>>>> .their
EOF
git reset --hard initial &&
mkdir sub &&
test_commit "add sub/file" "sub/file" "AAA" add-tree-a-b-A &&
git reset --hard initial &&
mkdir sub &&
test_commit "add sub/file" "sub/file" "BBB" add-tree-a-b-B &&
git merge-tree initial add-tree-a-b-A add-tree-a-b-B >actual &&
test_cmp expect actual
'
test_expect_success 'tree unchanged A, removed B' '
cat >expect <<-\EOF &&
removed in remote
base 100644 43d5a8ed6ef6c00ff775008633f95787d088285d sub/file
our 100644 43d5a8ed6ef6c00ff775008633f95787d088285d sub/file
@@ -1 +0,0 @@
-AAA
EOF
git reset --hard initial &&
mkdir sub &&
test_commit "add sub/file" "sub/file" "AAA" tree-remove-b-initial &&
git rm sub/file &&
test_tick &&
git commit -m "remove sub/file" &&
git tag tree-remove-b-B &&
git merge-tree tree-remove-b-initial tree-remove-b-initial tree-remove-b-B >actual &&
test_cmp expect actual
'
test_expect_success 'turn file to tree' '
git reset --hard initial &&
rm initial-file &&
mkdir initial-file &&
test_commit "turn-file-to-tree" "initial-file/ONE" "CCC" &&
git merge-tree initial initial turn-file-to-tree >actual &&
cat >expect <<-\EOF &&
added in remote
their 100644 43aa4fdec31eb92e1fdc2f0ce6ea9ddb7c32bcf7 initial-file/ONE
@@ -0,0 +1 @@
+CCC
removed in remote
base 100644 e79c5e8f964493290a409888d5413a737e8e5dd5 initial-file
our 100644 e79c5e8f964493290a409888d5413a737e8e5dd5 initial-file
@@ -1 +0,0 @@
-initial
EOF
test_cmp expect actual
'
test_expect_success 'turn tree to file' '
git reset --hard initial &&
mkdir dir &&
test_commit "add-tree" "dir/path" "AAA" &&
test_commit "add-another-tree" "dir/another" "BBB" &&
rm -fr dir &&
test_commit "make-file" "dir" "CCC" &&
git merge-tree add-tree add-another-tree make-file >actual &&
cat >expect <<-\EOF &&
removed in remote
base 100644 43d5a8ed6ef6c00ff775008633f95787d088285d dir/path
our 100644 43d5a8ed6ef6c00ff775008633f95787d088285d dir/path
@@ -1 +0,0 @@
-AAA
added in remote
their 100644 43aa4fdec31eb92e1fdc2f0ce6ea9ddb7c32bcf7 dir
@@ -0,0 +1 @@
+CCC
EOF
test_cmp expect actual
'
test_done
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