git-commit-vandalism/t/t6002-rev-list-bisect.sh
Junio C Hamano 215a7ad1ef Big tool rename.
As promised, this is the "big tool rename" patch.  The primary differences
since 0.99.6 are:

  (1) git-*-script are no more.  The commands installed do not
      have any such suffix so users do not have to remember if
      something is implemented as a shell script or not.

  (2) Many command names with 'cache' in them are renamed with
      'index' if that is what they mean.

There are backward compatibility symblic links so that you and
Porcelains can keep using the old names, but the backward
compatibility support  is expected to be removed in the near
future.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-09-07 17:45:20 -07:00

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#!/bin/sh
#
# Copyright (c) 2005 Jon Seymour
#
test_description='Tests git-rev-list --bisect functionality'
. ./test-lib.sh
. ../t6000lib.sh # t6xxx specific functions
bc_expr()
{
bc <<EOF
scale=1
define abs(x) {
if (x>=0) { return (x); } else { return (-x); }
}
define floor(x) {
save=scale; scale=0; result=x/1; scale=save; return (result);
}
$*
EOF
}
# usage: test_bisection max-diff bisect-option head ^prune...
#
# e.g. test_bisection 1 --bisect l1 ^l0
#
test_bisection_diff()
{
_max_diff=$1
_bisect_option=$2
shift 2
_bisection=$(git-rev-list $_bisect_option "$@")
_list_size=$(git-rev-list "$@" | wc -l)
_head=$1
shift 1
_bisection_size=$(git-rev-list $_bisection "$@" | wc -l)
[ -n "$_list_size" -a -n "$_bisection_size" ] || error "test_bisection_diff failed"
test_expect_success "bisection diff $_bisect_option $_head $* <= $_max_diff" "[ $(bc_expr "floor(abs($_list_size/2)-$_bisection_size)") -le $_max_diff ]"
}
date >path0
git-update-index --add path0
save_tag tree git-write-tree
on_committer_date "1971-08-16 00:00:00" hide_error save_tag root unique_commit root tree
on_committer_date "1971-08-16 00:00:01" save_tag l0 unique_commit l0 tree -p root
on_committer_date "1971-08-16 00:00:02" save_tag l1 unique_commit l1 tree -p l0
on_committer_date "1971-08-16 00:00:03" save_tag l2 unique_commit l2 tree -p l1
on_committer_date "1971-08-16 00:00:04" save_tag a0 unique_commit a0 tree -p l2
on_committer_date "1971-08-16 00:00:05" save_tag a1 unique_commit a1 tree -p a0
on_committer_date "1971-08-16 00:00:06" save_tag b1 unique_commit b1 tree -p a0
on_committer_date "1971-08-16 00:00:07" save_tag c1 unique_commit c1 tree -p b1
on_committer_date "1971-08-16 00:00:08" save_tag b2 unique_commit b2 tree -p b1
on_committer_date "1971-08-16 00:00:09" save_tag b3 unique_commit b2 tree -p b2
on_committer_date "1971-08-16 00:00:10" save_tag c2 unique_commit c2 tree -p c1 -p b2
on_committer_date "1971-08-16 00:00:11" save_tag c3 unique_commit c3 tree -p c2
on_committer_date "1971-08-16 00:00:12" save_tag a2 unique_commit a2 tree -p a1
on_committer_date "1971-08-16 00:00:13" save_tag a3 unique_commit a3 tree -p a2
on_committer_date "1971-08-16 00:00:14" save_tag b4 unique_commit b4 tree -p b3 -p a3
on_committer_date "1971-08-16 00:00:15" save_tag a4 unique_commit a4 tree -p a3 -p b4 -p c3
on_committer_date "1971-08-16 00:00:16" save_tag l3 unique_commit l3 tree -p a4
on_committer_date "1971-08-16 00:00:17" save_tag l4 unique_commit l4 tree -p l3
on_committer_date "1971-08-16 00:00:18" save_tag l5 unique_commit l5 tree -p l4
tag l5 > .git/HEAD
# E
# / \
# e1 |
# | |
# e2 |
# | |
# e3 |
# | |
# e4 |
# | |
# | f1
# | |
# | f2
# | |
# | f3
# | |
# | f4
# | |
# e5 |
# | |
# e6 |
# | |
# e7 |
# | |
# e8 |
# \ /
# F
on_committer_date "1971-08-16 00:00:00" hide_error save_tag F unique_commit F tree
on_committer_date "1971-08-16 00:00:01" save_tag e8 unique_commit e8 tree -p F
on_committer_date "1971-08-16 00:00:02" save_tag e7 unique_commit e7 tree -p e8
on_committer_date "1971-08-16 00:00:03" save_tag e6 unique_commit e6 tree -p e7
on_committer_date "1971-08-16 00:00:04" save_tag e5 unique_commit e5 tree -p e6
on_committer_date "1971-08-16 00:00:05" save_tag f4 unique_commit f4 tree -p F
on_committer_date "1971-08-16 00:00:06" save_tag f3 unique_commit f3 tree -p f4
on_committer_date "1971-08-16 00:00:07" save_tag f2 unique_commit f2 tree -p f3
on_committer_date "1971-08-16 00:00:08" save_tag f1 unique_commit f1 tree -p f2
on_committer_date "1971-08-16 00:00:09" save_tag e4 unique_commit e4 tree -p e5
on_committer_date "1971-08-16 00:00:10" save_tag e3 unique_commit e3 tree -p e4
on_committer_date "1971-08-16 00:00:11" save_tag e2 unique_commit e2 tree -p e3
on_committer_date "1971-08-16 00:00:12" save_tag e1 unique_commit e1 tree -p e2
on_committer_date "1971-08-16 00:00:13" save_tag E unique_commit E tree -p e1 -p f1
on_committer_date "1971-08-16 00:00:00" hide_error save_tag U unique_commit U tree
on_committer_date "1971-08-16 00:00:01" save_tag u0 unique_commit u0 tree -p U
on_committer_date "1971-08-16 00:00:01" save_tag u1 unique_commit u1 tree -p u0
on_committer_date "1971-08-16 00:00:02" save_tag u2 unique_commit u2 tree -p u0
on_committer_date "1971-08-16 00:00:03" save_tag u3 unique_commit u3 tree -p u0
on_committer_date "1971-08-16 00:00:04" save_tag u4 unique_commit u4 tree -p u0
on_committer_date "1971-08-16 00:00:05" save_tag u5 unique_commit u5 tree -p u0
on_committer_date "1971-08-16 00:00:06" save_tag V unique_commit V tree -p u1 -p u2 -p u3 -p u4 -p u5
test_sequence()
{
_bisect_option=$1
test_bisection_diff 0 $_bisect_option l0 ^root
test_bisection_diff 0 $_bisect_option l1 ^root
test_bisection_diff 0 $_bisect_option l2 ^root
test_bisection_diff 0 $_bisect_option a0 ^root
test_bisection_diff 0 $_bisect_option a1 ^root
test_bisection_diff 0 $_bisect_option a2 ^root
test_bisection_diff 0 $_bisect_option a3 ^root
test_bisection_diff 0 $_bisect_option b1 ^root
test_bisection_diff 0 $_bisect_option b2 ^root
test_bisection_diff 0 $_bisect_option b3 ^root
test_bisection_diff 0 $_bisect_option c1 ^root
test_bisection_diff 0 $_bisect_option c2 ^root
test_bisection_diff 0 $_bisect_option c3 ^root
test_bisection_diff 0 $_bisect_option E ^F
test_bisection_diff 0 $_bisect_option e1 ^F
test_bisection_diff 0 $_bisect_option e2 ^F
test_bisection_diff 0 $_bisect_option e3 ^F
test_bisection_diff 0 $_bisect_option e4 ^F
test_bisection_diff 0 $_bisect_option e5 ^F
test_bisection_diff 0 $_bisect_option e6 ^F
test_bisection_diff 0 $_bisect_option e7 ^F
test_bisection_diff 0 $_bisect_option f1 ^F
test_bisection_diff 0 $_bisect_option f2 ^F
test_bisection_diff 0 $_bisect_option f3 ^F
test_bisection_diff 0 $_bisect_option f4 ^F
test_bisection_diff 0 $_bisect_option E ^F
test_bisection_diff 1 $_bisect_option V ^U
test_bisection_diff 0 $_bisect_option V ^U ^u1 ^u2 ^u3
test_bisection_diff 0 $_bisect_option u1 ^U
test_bisection_diff 0 $_bisect_option u2 ^U
test_bisection_diff 0 $_bisect_option u3 ^U
test_bisection_diff 0 $_bisect_option u4 ^U
test_bisection_diff 0 $_bisect_option u5 ^U
#
# the following illustrate's Linus' binary bug blatt idea.
#
# assume the bug is actually at l3, but you don't know that - all you know is that l3 is broken
# and it wasn't broken before
#
# keep bisecting the list, advancing the "bad" head and accumulating "good" heads until
# the bisection point is the head - this is the bad point.
#
test_output_expect_success "--bisect l5 ^root" 'git-rev-list $_bisect_option l5 ^root' <<EOF
c3
EOF
test_output_expect_success "$_bisect_option l5 ^root ^c3" 'git-rev-list $_bisect_option l5 ^root ^c3' <<EOF
b4
EOF
test_output_expect_success "$_bisect_option l5 ^root ^c3 ^b4" 'git-rev-list $_bisect_option l5 ^c3 ^b4' <<EOF
l3
EOF
test_output_expect_success "$_bisect_option l3 ^root ^c3 ^b4" 'git-rev-list $_bisect_option l3 ^root ^c3 ^b4' <<EOF
a4
EOF
test_output_expect_success "$_bisect_option l5 ^b3 ^a3 ^b4 ^a4" 'git-rev-list $_bisect_option l3 ^b3 ^a3 ^a4' <<EOF
l3
EOF
#
# if l3 is bad, then l4 is bad too - so advance the bad pointer by making b4 the known bad head
#
test_output_expect_success "$_bisect_option l4 ^a2 ^a3 ^b ^a4" 'git-rev-list $_bisect_option l4 ^a2 ^a3 ^a4' <<EOF
l3
EOF
test_output_expect_success "$_bisect_option l3 ^a2 ^a3 ^b ^a4" 'git-rev-list $_bisect_option l3 ^a2 ^a3 ^a4' <<EOF
l3
EOF
# found!
#
# as another example, let's consider a4 to be the bad head, in which case
#
test_output_expect_success "$_bisect_option a4 ^a2 ^a3 ^b4" 'git-rev-list $_bisect_option a4 ^a2 ^a3 ^b4' <<EOF
c2
EOF
test_output_expect_success "$_bisect_option a4 ^a2 ^a3 ^b4 ^c2" 'git-rev-list $_bisect_option a4 ^a2 ^a3 ^b4 ^c2' <<EOF
c3
EOF
test_output_expect_success "$_bisect_option a4 ^a2 ^a3 ^b4 ^c2 ^c3" 'git-rev-list $_bisect_option a4 ^a2 ^a3 ^b4 ^c2 ^c3' <<EOF
a4
EOF
# found!
#
# or consider c3 to be the bad head
#
test_output_expect_success "$_bisect_option a4 ^a2 ^a3 ^b4" 'git-rev-list $_bisect_option a4 ^a2 ^a3 ^b4' <<EOF
c2
EOF
test_output_expect_success "$_bisect_option c3 ^a2 ^a3 ^b4 ^c2" 'git-rev-list $_bisect_option c3 ^a2 ^a3 ^b4 ^c2' <<EOF
c3
EOF
# found!
}
test_sequence "--bisect"
#
#
test_done