[PATCH v5 00/14] t5520: various test cleanup

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Like earlier patchsets, I want to implement a feature that involves
modifications to the test suite. Since that feature will probably take a
while to polish up, however, let's clean up the test suite in a separate
patchset first so it's not blocked by the feature work.

1/15 is a general improvement to test_rev_cmp() that will be used later
in the series.

Changes since v4:

* Cleaned up test_cmp_rev() logic with suggestions from Junio

Changes since v3:

* Rebased and tested on top of v2.24.0

Changes since v2:

* Drop 't7408: replace `test_must_fail test_path_is_file`' since it's
  not a rabbit hole we want to go into right now

* Fix the output of `test_cmp_rev !` when revs are actually equal

* Rebase against the latest master since this topic hasn't been picked
  up yet

Changes since v1:

* Incorporate Eric's feedback

Denton Liu (14):
  t: teach test_cmp_rev to accept ! for not-equals
  t5520: improve test style
  t5520: use sq for test case names
  t5520: let sed open its own input
  t5520: replace test -f with test-lib functions
  t5520: remove spaces after redirect operator
  t5520: use test_line_count where possible
  t5520: replace test -{n,z} with test-lib functions
  t5520: use test_cmp_rev where possible
  t5520: test single-line files by git with test_cmp
  t5520: don't put git in upstream of pipe
  t5520: replace subshell cat comparison with test_cmp
  t5520: remove redundant lines in test cases
  t5520: replace `! git` with `test_must_fail git`

 t/t2400-worktree-add.sh             |   4 +-
 t/t3400-rebase.sh                   |   2 +-
 t/t3421-rebase-topology-linear.sh   |   6 +-
 t/t3430-rebase-merges.sh            |   2 +-
 t/t3432-rebase-fast-forward.sh      |   2 +-
 t/t3501-revert-cherry-pick.sh       |   2 +-
 t/t3508-cherry-pick-many-commits.sh |   2 +-
 t/t5520-pull.sh                     | 343 +++++++++++++++++-----------
 t/test-lib-functions.sh             |  25 +-
 9 files changed, 236 insertions(+), 152 deletions(-)

Range-diff against v4:
 1:  06f89b85f3 !  1:  3c58df27c4 t: teach test_cmp_rev to accept ! for not-equals
    @@ Metadata
      ## Commit message ##
         t: teach test_cmp_rev to accept ! for not-equals
     
    -    Currently, in the case where we are using test_cmp_rev() to report
    -    not-equals, we write `! test_cmp_rev`. However, since test_cmp_rev()
    -    contains
    +    In the case where we are using test_cmp_rev() to report not-equals, we
    +    write `! test_cmp_rev`. However, since test_cmp_rev() contains
     
                 r1=$(git rev-parse --verify "$1") &&
                 r2=$(git rev-parse --verify "$2") &&
     
    -    In the case where `git rev-parse` segfaults and dies unexpectedly, the
    -    failure will be ignored.
    +    `! test_cmp_rev` will succeed if any of the rev-parses fail. This
    +    behavior is not desired. We want the rev-parses to _always_ be
    +    successful.
     
         Rewrite test_cmp_rev() to optionally accept "!" as the first argument to
         do a not-equals comparison. Rewrite `! test_cmp_rev` to `test_cmp_rev !`
         in all tests to take advantage of this new functionality.
     
    +    Also, rewrite the rev-parse logic to end with a `|| return 1` instead of
    +    &&-chaining into the rev-comparison logic. This makes it obvious to
    +    future readers that we explicitly intend on returning early if either of
    +    the rev-parses fail.
    +
         Signed-off-by: Denton Liu <liu.denton@xxxxxxxxx>
     
      ## t/t2400-worktree-add.sh ##
    @@ t/test-lib-functions.sh: test_must_be_empty () {
     +# provided first, that its other two parameters refer to different
     +# revisions.
      test_cmp_rev () {
    -+	local inverted_op
    -+	inverted_op='!='
    ++	local op
    ++	op='='
     +	if test $# -ge 1 && test "x$1" = 'x!'
     +	then
    -+	    inverted_op='='
    ++	    op='!='
     +	    shift
     +	fi
      	if test $# != 2
      	then
      		error "bug in the test script: test_cmp_rev requires two revisions, but got $#"
    -@@ t/test-lib-functions.sh: test_cmp_rev () {
    + 	else
      		local r1 r2
      		r1=$(git rev-parse --verify "$1") &&
    - 		r2=$(git rev-parse --verify "$2") &&
    +-		r2=$(git rev-parse --verify "$2") &&
     -		if test "$r1" != "$r2"
    -+		if test "$r1" "$inverted_op" "$r2"
    ++		r2=$(git rev-parse --verify "$2") || return 1
    ++
    ++		if ! test "$r1" "$op" "$r2"
      		then
     +			local comp_out
    -+			if "x$inverted_op" = 'x='
    ++			if "x$op" = 'x='
     +			then
    -+				comp_out='the same'
    -+			else
     +				comp_out='different'
    ++			else
    ++				comp_out='the same'
     +			fi
      			cat >&4 <<-EOF
     -			error: two revisions point to different objects:
 2:  11714ca897 =  2:  023e0ccc11 t5520: improve test style
 3:  2c27c8d60a =  3:  1bb65a59da t5520: use sq for test case names
 4:  5a196cf136 =  4:  d2fbae6ade t5520: let sed open its own input
 5:  0c8baddc7d =  5:  1d73546eb6 t5520: replace test -f with test-lib functions
 6:  2775817d02 =  6:  f1141f244f t5520: remove spaces after redirect operator
 7:  d71fe3d097 =  7:  5106004e95 t5520: use test_line_count where possible
 8:  dd16809b68 =  8:  85b444e8a6 t5520: replace test -{n,z} with test-lib functions
 9:  abfa6539aa =  9:  3d43784391 t5520: use test_cmp_rev where possible
10:  06cb5c1302 = 10:  2f9052fd94 t5520: test single-line files by git with test_cmp
11:  f47f11ccfa = 11:  3fd10a58c6 t5520: don't put git in upstream of pipe
12:  3dfc417670 = 12:  ed78ed75bd t5520: replace subshell cat comparison with test_cmp
13:  575bd0f0cd = 13:  7888757bd0 t5520: remove redundant lines in test cases
14:  bd92e3821e = 14:  1bc7ad364f t5520: replace `! git` with `test_must_fail git`
-- 
2.24.0.300.g722ba42680




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