Collect merge-related tests to t64xx

The tests for the merge machinery are spread over several places.
Collect them into t64xx for simplicity.  Some notes:

t60[234]*.sh:
  Merge tests started in t602*, overgrew bisect and remote tracking
  tests in t6030, t6040, and t6041, and nearly overtook replace tests
  in t6050.  This made picking out relevant tests that I wanted to run
  in a tighter loop slightly more annoying for years.

t303*.sh:
  These started out as tests for the 'merge-recursive' toplevel command,
  but did not restrict to that and had lots of overlap with the
  underlying merge machinery.
t7405, t7613:
  submodule-specific merge logic started out in submodule.c but was
  moved to merge-recursive.c in commit 18cfc08866 ("submodule.c: move
  submodule merging to merge-recursive.c", 2018-05-15).  Since these
  tests are about the logic found in the merge machinery, moving these
  tests to be with the merge tests makes sense.

t7607, t7609:
  Having tests spread all over the place makes it more likely that
  additional tests related to a certain piece of logic grow in all those
  other places.  Much like t303*.sh, these two tests were about the
  underlying merge machinery rather than outer levels.

Tests that were NOT moved:

t76[01]*.sh:
  Other than the four tests mentioned above, the remaining tests in
  t76[01]*.sh are related to non-recursive merge strategies, parameter
  parsing, and other stuff associated with the highlevel builtin/merge.c
  rather than the recursive merge machinery.

t3[45]*.sh:
  The rebase testcases in t34*.sh also test the merge logic pretty
  heavily; sometimes changes I make only trigger failures in the rebase
  tests.  The rebase tests are already nicely coupled together, though,
  and I didn't want to mess that up.  Similar comments apply for the
  cherry-pick tests in t35*.sh.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 390 insertions, 0 deletions

diff --git a/t/t6403-merge-file.sh b/t/t6403-merge-file.sh
new file mode 100755
index 0000000000..2f421d967a
--- /dev/null
+++ b/t/t6403-merge-file.sh
@@ -0,0 +1,390 @@
+#!/bin/sh
+
+test_description='RCS merge replacement: merge-file'
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+	cat >orig.txt <<-\EOF &&
+	Dominus regit me,
+	et nihil mihi deerit.
+	In loco pascuae ibi me collocavit,
+	super aquam refectionis educavit me;
+	animam meam convertit,
+	deduxit me super semitas jusitiae,
+	propter nomen suum.
+	EOF
+
+	cat >new1.txt <<-\EOF &&
+	Dominus regit me,
+	et nihil mihi deerit.
+	In loco pascuae ibi me collocavit,
+	super aquam refectionis educavit me;
+	animam meam convertit,
+	deduxit me super semitas jusitiae,
+	propter nomen suum.
+	Nam et si ambulavero in medio umbrae mortis,
+	non timebo mala, quoniam tu mecum es:
+	virga tua et baculus tuus ipsa me consolata sunt.
+	EOF
+
+	cat >new2.txt <<-\EOF &&
+	Dominus regit me, et nihil mihi deerit.
+	In loco pascuae ibi me collocavit,
+	super aquam refectionis educavit me;
+	animam meam convertit,
+	deduxit me super semitas jusitiae,
+	propter nomen suum.
+	EOF
+
+	cat >new3.txt <<-\EOF &&
+	DOMINUS regit me,
+	et nihil mihi deerit.
+	In loco pascuae ibi me collocavit,
+	super aquam refectionis educavit me;
+	animam meam convertit,
+	deduxit me super semitas jusitiae,
+	propter nomen suum.
+	EOF
+
+	cat >new4.txt <<-\EOF &&
+	Dominus regit me, et nihil mihi deerit.
+	In loco pascuae ibi me collocavit,
+	super aquam refectionis educavit me;
+	animam meam convertit,
+	deduxit me super semitas jusitiae,
+	EOF
+
+	printf "propter nomen suum." >>new4.txt
+'
+
+test_expect_success 'merge with no changes' '
+	cp orig.txt test.txt &&
+	git merge-file test.txt orig.txt orig.txt &&
+	test_cmp test.txt orig.txt
+'
+
+test_expect_success "merge without conflict" '
+	cp new1.txt test.txt &&
+	git merge-file test.txt orig.txt new2.txt
+'
+
+test_expect_success 'works in subdirectory' '
+	mkdir dir &&
+	cp new1.txt dir/a.txt &&
+	cp orig.txt dir/o.txt &&
+	cp new2.txt dir/b.txt &&
+	( cd dir && git merge-file a.txt o.txt b.txt ) &&
+	test_path_is_missing a.txt
+'
+
+test_expect_success "merge without conflict (--quiet)" '
+	cp new1.txt test.txt &&
+	git merge-file --quiet test.txt orig.txt new2.txt
+'
+
+test_expect_failure "merge without conflict (missing LF at EOF)" '
+	cp new1.txt test2.txt &&
+	git merge-file test2.txt orig.txt new4.txt
+'
+
+test_expect_failure "merge result added missing LF" '
+	test_cmp test.txt test2.txt
+'
+
+test_expect_success "merge without conflict (missing LF at EOF, away from change in the other file)" '
+	cp new4.txt test3.txt &&
+	git merge-file --quiet test3.txt new2.txt new3.txt
+'
+
+test_expect_success "merge does not add LF away of change" '
+	cat >expect.txt <<-\EOF &&
+	DOMINUS regit me,
+	et nihil mihi deerit.
+	In loco pascuae ibi me collocavit,
+	super aquam refectionis educavit me;
+	animam meam convertit,
+	deduxit me super semitas jusitiae,
+	EOF
+	printf "propter nomen suum." >>expect.txt &&
+
+	test_cmp expect.txt test3.txt
+'
+
+test_expect_success "merge with conflicts" '
+	cp test.txt backup.txt &&
+	test_must_fail git merge-file test.txt orig.txt new3.txt
+'
+
+test_expect_success "expected conflict markers" '
+	cat >expect.txt <<-\EOF &&
+	<<<<<<< test.txt
+	Dominus regit me, et nihil mihi deerit.
+	=======
+	DOMINUS regit me,
+	et nihil mihi deerit.
+	>>>>>>> new3.txt
+	In loco pascuae ibi me collocavit,
+	super aquam refectionis educavit me;
+	animam meam convertit,
+	deduxit me super semitas jusitiae,
+	propter nomen suum.
+	Nam et si ambulavero in medio umbrae mortis,
+	non timebo mala, quoniam tu mecum es:
+	virga tua et baculus tuus ipsa me consolata sunt.
+	EOF
+
+	test_cmp expect.txt test.txt
+'
+
+test_expect_success "merge conflicting with --ours" '
+	cp backup.txt test.txt &&
+
+	cat >expect.txt <<-\EOF &&
+	Dominus regit me, et nihil mihi deerit.
+	In loco pascuae ibi me collocavit,
+	super aquam refectionis educavit me;
+	animam meam convertit,
+	deduxit me super semitas jusitiae,
+	propter nomen suum.
+	Nam et si ambulavero in medio umbrae mortis,
+	non timebo mala, quoniam tu mecum es:
+	virga tua et baculus tuus ipsa me consolata sunt.
+	EOF
+
+	git merge-file --ours test.txt orig.txt new3.txt &&
+	test_cmp expect.txt test.txt
+'
+
+test_expect_success "merge conflicting with --theirs" '
+	cp backup.txt test.txt &&
+
+	cat >expect.txt <<-\EOF &&
+	DOMINUS regit me,
+	et nihil mihi deerit.
+	In loco pascuae ibi me collocavit,
+	super aquam refectionis educavit me;
+	animam meam convertit,
+	deduxit me super semitas jusitiae,
+	propter nomen suum.
+	Nam et si ambulavero in medio umbrae mortis,
+	non timebo mala, quoniam tu mecum es:
+	virga tua et baculus tuus ipsa me consolata sunt.
+	EOF
+
+	git merge-file --theirs test.txt orig.txt new3.txt &&
+	test_cmp expect.txt test.txt
+'
+
+test_expect_success "merge conflicting with --union" '
+	cp backup.txt test.txt &&
+
+	cat >expect.txt <<-\EOF &&
+	Dominus regit me, et nihil mihi deerit.
+	DOMINUS regit me,
+	et nihil mihi deerit.
+	In loco pascuae ibi me collocavit,
+	super aquam refectionis educavit me;
+	animam meam convertit,
+	deduxit me super semitas jusitiae,
+	propter nomen suum.
+	Nam et si ambulavero in medio umbrae mortis,
+	non timebo mala, quoniam tu mecum es:
+	virga tua et baculus tuus ipsa me consolata sunt.
+	EOF
+
+	git merge-file --union test.txt orig.txt new3.txt &&
+	test_cmp expect.txt test.txt
+'
+
+test_expect_success "merge with conflicts, using -L" '
+	cp backup.txt test.txt &&
+
+	test_must_fail git merge-file -L 1 -L 2 test.txt orig.txt new3.txt
+'
+
+test_expect_success "expected conflict markers, with -L" '
+	cat >expect.txt <<-\EOF &&
+	<<<<<<< 1
+	Dominus regit me, et nihil mihi deerit.
+	=======
+	DOMINUS regit me,
+	et nihil mihi deerit.
+	>>>>>>> new3.txt
+	In loco pascuae ibi me collocavit,
+	super aquam refectionis educavit me;
+	animam meam convertit,
+	deduxit me super semitas jusitiae,
+	propter nomen suum.
+	Nam et si ambulavero in medio umbrae mortis,
+	non timebo mala, quoniam tu mecum es:
+	virga tua et baculus tuus ipsa me consolata sunt.
+	EOF
+
+	test_cmp expect.txt test.txt
+'
+
+test_expect_success "conflict in removed tail" '
+	sed "s/ tu / TU /" <new1.txt >new5.txt &&
+	test_must_fail git merge-file -p orig.txt new1.txt new5.txt >out
+'
+
+test_expect_success "expected conflict markers" '
+	cat >expect <<-\EOF &&
+	Dominus regit me,
+	et nihil mihi deerit.
+	In loco pascuae ibi me collocavit,
+	super aquam refectionis educavit me;
+	animam meam convertit,
+	deduxit me super semitas jusitiae,
+	propter nomen suum.
+	<<<<<<< orig.txt
+	=======
+	Nam et si ambulavero in medio umbrae mortis,
+	non timebo mala, quoniam TU mecum es:
+	virga tua et baculus tuus ipsa me consolata sunt.
+	>>>>>>> new5.txt
+	EOF
+
+	test_cmp expect out
+'
+
+test_expect_success 'binary files cannot be merged' '
+	test_must_fail git merge-file -p \
+		orig.txt "$TEST_DIRECTORY"/test-binary-1.png new1.txt 2> merge.err &&
+	grep "Cannot merge binary files" merge.err
+'
+
+test_expect_success 'MERGE_ZEALOUS simplifies non-conflicts' '
+	sed -e "s/deerit.\$/deerit;/" -e "s/me;\$/me./" <new5.txt >new6.txt &&
+	sed -e "s/deerit.\$/deerit,/" -e "s/me;\$/me,/" <new5.txt >new7.txt &&
+
+	test_must_fail git merge-file -p new6.txt new5.txt new7.txt > output &&
+	test 1 = $(grep ======= <output | wc -l)
+'
+
+test_expect_success 'ZEALOUS_ALNUM' '
+	sed -e "s/deerit./&%%%%/" -e "s/locavit,/locavit;/" <new6.txt | tr % "\012" >new8.txt &&
+	sed -e "s/deerit./&%%%%/" -e "s/locavit,/locavit --/" <new7.txt | tr % "\012" >new9.txt &&
+
+	test_must_fail git merge-file -p \
+		new8.txt new5.txt new9.txt >merge.out &&
+	test 1 = $(grep ======= <merge.out | wc -l)
+'
+
+test_expect_success '"diff3 -m" style output (1)' '
+	cat >expect <<-\EOF &&
+	Dominus regit me,
+	<<<<<<< new8.txt
+	et nihil mihi deerit;
+
+
+
+
+	In loco pascuae ibi me collocavit;
+	super aquam refectionis educavit me.
+	||||||| new5.txt
+	et nihil mihi deerit.
+	In loco pascuae ibi me collocavit,
+	super aquam refectionis educavit me;
+	=======
+	et nihil mihi deerit,
+
+
+
+
+	In loco pascuae ibi me collocavit --
+	super aquam refectionis educavit me,
+	>>>>>>> new9.txt
+	animam meam convertit,
+	deduxit me super semitas jusitiae,
+	propter nomen suum.
+	Nam et si ambulavero in medio umbrae mortis,
+	non timebo mala, quoniam TU mecum es:
+	virga tua et baculus tuus ipsa me consolata sunt.
+	EOF
+
+	test_must_fail git merge-file -p --diff3 \
+		new8.txt new5.txt new9.txt >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success '"diff3 -m" style output (2)' '
+	git config merge.conflictstyle diff3 &&
+	test_must_fail git merge-file -p \
+		new8.txt new5.txt new9.txt >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'marker size' '
+	cat >expect <<-\EOF &&
+	Dominus regit me,
+	<<<<<<<<<< new8.txt
+	et nihil mihi deerit;
+
+
+
+
+	In loco pascuae ibi me collocavit;
+	super aquam refectionis educavit me.
+	|||||||||| new5.txt
+	et nihil mihi deerit.
+	In loco pascuae ibi me collocavit,
+	super aquam refectionis educavit me;
+	==========
+	et nihil mihi deerit,
+
+
+
+
+	In loco pascuae ibi me collocavit --
+	super aquam refectionis educavit me,
+	>>>>>>>>>> new9.txt
+	animam meam convertit,
+	deduxit me super semitas jusitiae,
+	propter nomen suum.
+	Nam et si ambulavero in medio umbrae mortis,
+	non timebo mala, quoniam TU mecum es:
+	virga tua et baculus tuus ipsa me consolata sunt.
+	EOF
+
+	test_must_fail git merge-file -p --marker-size=10 \
+		new8.txt new5.txt new9.txt >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'conflict at EOF without LF resolved by --ours' '
+	printf "line1\nline2\nline3" >nolf-orig.txt &&
+	printf "line1\nline2\nline3x" >nolf-diff1.txt &&
+	printf "line1\nline2\nline3y" >nolf-diff2.txt &&
+
+	git merge-file -p --ours nolf-diff1.txt nolf-orig.txt nolf-diff2.txt >output.txt &&
+	printf "line1\nline2\nline3x" >expect.txt &&
+	test_cmp expect.txt output.txt
+'
+
+test_expect_success 'conflict at EOF without LF resolved by --theirs' '
+	git merge-file -p --theirs nolf-diff1.txt nolf-orig.txt nolf-diff2.txt >output.txt &&
+	printf "line1\nline2\nline3y" >expect.txt &&
+	test_cmp expect.txt output.txt
+'
+
+test_expect_success 'conflict at EOF without LF resolved by --union' '
+	git merge-file -p --union nolf-diff1.txt nolf-orig.txt nolf-diff2.txt >output.txt &&
+	printf "line1\nline2\nline3x\nline3y" >expect.txt &&
+	test_cmp expect.txt output.txt
+'
+
+test_expect_success 'conflict sections match existing line endings' '
+	printf "1\\r\\n2\\r\\n3" >crlf-orig.txt &&
+	printf "1\\r\\n2\\r\\n4" >crlf-diff1.txt &&
+	printf "1\\r\\n2\\r\\n5" >crlf-diff2.txt &&
+	test_must_fail git -c core.eol=crlf merge-file -p \
+		crlf-diff1.txt crlf-orig.txt crlf-diff2.txt >crlf.txt &&
+	test $(tr "\015" Q <crlf.txt | grep "^[<=>].*Q$" | wc -l) = 3 &&
+	test $(tr "\015" Q <crlf.txt | grep "[345]Q$" | wc -l) = 3 &&
+	test_must_fail git -c core.eol=crlf merge-file -p \
+		nolf-diff1.txt nolf-orig.txt nolf-diff2.txt >nolf.txt &&
+	test $(tr "\015" Q <nolf.txt | grep "^[<=>].*Q$" | wc -l) = 0
+'
+
+test_done