t/t6030-bisect-porcelain.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2007 Christian Couder
   4 #
   5 test_description='Tests git bisect functionality'
   6
   7 exec </dev/null
   8
   9 . ./test-lib.sh
  10
  11 add_line_into_file()
  12 {
  13     _line=$1
  14     _file=$2
  15
  16     if [ -f "$_file" ]; then
  17         echo "$_line" >> $_file || return $?
  18         MSG="Add <$_line> into <$_file>."
  19     else
  20         echo "$_line" > $_file || return $?
  21         git add $_file || return $?
  22         MSG="Create file <$_file> with <$_line> inside."
  23     fi
  24
  25     test_tick
  26     git commit --quiet -m "$MSG" $_file
  27 }
  28
  29 HASH1=
  30 HASH2=
  31 HASH3=
  32 HASH4=
  33
  34 test_expect_success 'set up basic repo with 1 file (hello) and 4 commits' '
  35      add_line_into_file "1: Hello World" hello &&
  36      HASH1=$(git rev-parse --verify HEAD) &&
  37      add_line_into_file "2: A new day for git" hello &&
  38      HASH2=$(git rev-parse --verify HEAD) &&
  39      add_line_into_file "3: Another new day for git" hello &&
  40      HASH3=$(git rev-parse --verify HEAD) &&
  41      add_line_into_file "4: Ciao for now" hello &&
  42      HASH4=$(git rev-parse --verify HEAD)
  43 '
  44
  45 test_expect_success 'bisect starts with only one bad' '
  46         git bisect reset &&
  47         git bisect start &&
  48         git bisect bad $HASH4 &&
  49         git bisect next
  50 '
  51
  52 test_expect_success 'bisect does not start with only one good' '
  53         git bisect reset &&
  54         git bisect start &&
  55         git bisect good $HASH1 || return 1
  56
  57         if git bisect next
  58         then
  59                 echo Oops, should have failed.
  60                 false
  61         else
  62                 :
  63         fi
  64 '
  65
  66 test_expect_success 'bisect start with one bad and good' '
  67         git bisect reset &&
  68         git bisect start &&
  69         git bisect good $HASH1 &&
  70         git bisect bad $HASH4 &&
  71         git bisect next
  72 '
  73
  74 test_expect_success 'bisect fails if given any junk instead of revs' '
  75         git bisect reset &&
  76         test_must_fail git bisect start foo $HASH1 -- &&
  77         test_must_fail git bisect start $HASH4 $HASH1 bar -- &&
  78         test -z "$(git for-each-ref "refs/bisect/*")" &&
  79         test -z "$(ls .git/BISECT_* 2>/dev/null)" &&
  80         git bisect start &&
  81         test_must_fail git bisect good foo $HASH1 &&
  82         test_must_fail git bisect good $HASH1 bar &&
  83         test_must_fail git bisect bad frotz &&
  84         test_must_fail git bisect bad $HASH3 $HASH4 &&
  85         test_must_fail git bisect skip bar $HASH3 &&
  86         test_must_fail git bisect skip $HASH1 foo &&
  87         test -z "$(git for-each-ref "refs/bisect/*")" &&
  88         git bisect good $HASH1 &&
  89         git bisect bad $HASH4
  90 '
  91
  92 test_expect_success 'bisect reset: back in the master branch' '
  93         git bisect reset &&
  94         echo "* master" > branch.expect &&
  95         git branch > branch.output &&
  96         cmp branch.expect branch.output
  97 '
  98
  99 test_expect_success 'bisect reset: back in another branch' '
 100         git checkout -b other &&
 101         git bisect start &&
 102         git bisect good $HASH1 &&
 103         git bisect bad $HASH3 &&
 104         git bisect reset &&
 105         echo "  master" > branch.expect &&
 106         echo "* other" >> branch.expect &&
 107         git branch > branch.output &&
 108         cmp branch.expect branch.output
 109 '
 110
 111 test_expect_success 'bisect reset when not bisecting' '
 112         git bisect reset &&
 113         git branch > branch.output &&
 114         cmp branch.expect branch.output
 115 '
 116
 117 test_expect_success 'bisect reset removes packed refs' '
 118         git bisect reset &&
 119         git bisect start &&
 120         git bisect good $HASH1 &&
 121         git bisect bad $HASH3 &&
 122         git pack-refs --all --prune &&
 123         git bisect next &&
 124         git bisect reset &&
 125         test -z "$(git for-each-ref "refs/bisect/*")" &&
 126         test -z "$(git for-each-ref "refs/heads/bisect")"
 127 '
 128
 129 test_expect_success 'bisect start: back in good branch' '
 130         git branch > branch.output &&
 131         grep "* other" branch.output > /dev/null &&
 132         git bisect start $HASH4 $HASH1 -- &&
 133         git bisect good &&
 134         git bisect start $HASH4 $HASH1 -- &&
 135         git bisect bad &&
 136         git bisect reset &&
 137         git branch > branch.output &&
 138         grep "* other" branch.output > /dev/null
 139 '
 140
 141 test_expect_success 'bisect start: no ".git/BISECT_START" if junk rev' '
 142         git bisect start $HASH4 $HASH1 -- &&
 143         git bisect good &&
 144         test_must_fail git bisect start $HASH4 foo -- &&
 145         git branch > branch.output &&
 146         grep "* other" branch.output > /dev/null &&
 147         test_must_fail test -e .git/BISECT_START
 148 '
 149
 150 test_expect_success 'bisect start: no ".git/BISECT_START" if mistaken rev' '
 151         git bisect start $HASH4 $HASH1 -- &&
 152         git bisect good &&
 153         test_must_fail git bisect start $HASH1 $HASH4 -- &&
 154         git branch > branch.output &&
 155         grep "* other" branch.output > /dev/null &&
 156         test_must_fail test -e .git/BISECT_START
 157 '
 158
 159 test_expect_success 'bisect start: no ".git/BISECT_START" if checkout error' '
 160         echo "temp stuff" > hello &&
 161         test_must_fail git bisect start $HASH4 $HASH1 -- &&
 162         git branch &&
 163         git branch > branch.output &&
 164         grep "* other" branch.output > /dev/null &&
 165         test_must_fail test -e .git/BISECT_START &&
 166         test -z "$(git for-each-ref "refs/bisect/*")" &&
 167         git checkout HEAD hello
 168 '
 169
 170 # $HASH1 is good, $HASH4 is bad, we skip $HASH3
 171 # but $HASH2 is bad,
 172 # so we should find $HASH2 as the first bad commit
 173 test_expect_success 'bisect skip: successfull result' '
 174         git bisect reset &&
 175         git bisect start $HASH4 $HASH1 &&
 176         git bisect skip &&
 177         git bisect bad > my_bisect_log.txt &&
 178         grep "$HASH2 is first bad commit" my_bisect_log.txt &&
 179         git bisect reset
 180 '
 181
 182 # $HASH1 is good, $HASH4 is bad, we skip $HASH3 and $HASH2
 183 # so we should not be able to tell the first bad commit
 184 # among $HASH2, $HASH3 and $HASH4
 185 test_expect_success 'bisect skip: cannot tell between 3 commits' '
 186         git bisect start $HASH4 $HASH1 &&
 187         git bisect skip || return 1
 188
 189         if git bisect skip > my_bisect_log.txt
 190         then
 191                 echo Oops, should have failed.
 192                 false
 193         else
 194                 test $? -eq 2 &&
 195                 grep "first bad commit could be any of" my_bisect_log.txt &&
 196                 ! grep $HASH1 my_bisect_log.txt &&
 197                 grep $HASH2 my_bisect_log.txt &&
 198                 grep $HASH3 my_bisect_log.txt &&
 199                 grep $HASH4 my_bisect_log.txt &&
 200                 git bisect reset
 201         fi
 202 '
 203
 204 # $HASH1 is good, $HASH4 is bad, we skip $HASH3
 205 # but $HASH2 is good,
 206 # so we should not be able to tell the first bad commit
 207 # among $HASH3 and $HASH4
 208 test_expect_success 'bisect skip: cannot tell between 2 commits' '
 209         git bisect start $HASH4 $HASH1 &&
 210         git bisect skip || return 1
 211
 212         if git bisect good > my_bisect_log.txt
 213         then
 214                 echo Oops, should have failed.
 215                 false
 216         else
 217                 test $? -eq 2 &&
 218                 grep "first bad commit could be any of" my_bisect_log.txt &&
 219                 ! grep $HASH1 my_bisect_log.txt &&
 220                 ! grep $HASH2 my_bisect_log.txt &&
 221                 grep $HASH3 my_bisect_log.txt &&
 222                 grep $HASH4 my_bisect_log.txt &&
 223                 git bisect reset
 224         fi
 225 '
 226
 227 # We want to automatically find the commit that
 228 # introduced "Another" into hello.
 229 test_expect_success \
 230     '"git bisect run" simple case' \
 231     'echo "#"\!"/bin/sh" > test_script.sh &&
 232      echo "grep Another hello > /dev/null" >> test_script.sh &&
 233      echo "test \$? -ne 0" >> test_script.sh &&
 234      chmod +x test_script.sh &&
 235      git bisect start &&
 236      git bisect good $HASH1 &&
 237      git bisect bad $HASH4 &&
 238      git bisect run ./test_script.sh > my_bisect_log.txt &&
 239      grep "$HASH3 is first bad commit" my_bisect_log.txt &&
 240      git bisect reset'
 241
 242 # We want to automatically find the commit that
 243 # introduced "Ciao" into hello.
 244 test_expect_success \
 245     '"git bisect run" with more complex "git bisect start"' \
 246     'echo "#"\!"/bin/sh" > test_script.sh &&
 247      echo "grep Ciao hello > /dev/null" >> test_script.sh &&
 248      echo "test \$? -ne 0" >> test_script.sh &&
 249      chmod +x test_script.sh &&
 250      git bisect start $HASH4 $HASH1 &&
 251      git bisect run ./test_script.sh > my_bisect_log.txt &&
 252      grep "$HASH4 is first bad commit" my_bisect_log.txt &&
 253      git bisect reset'
 254
 255 # $HASH1 is good, $HASH5 is bad, we skip $HASH3
 256 # but $HASH4 is good,
 257 # so we should find $HASH5 as the first bad commit
 258 HASH5=
 259 test_expect_success 'bisect skip: add line and then a new test' '
 260         add_line_into_file "5: Another new line." hello &&
 261         HASH5=$(git rev-parse --verify HEAD) &&
 262         git bisect start $HASH5 $HASH1 &&
 263         git bisect skip &&
 264         git bisect good > my_bisect_log.txt &&
 265         grep "$HASH5 is first bad commit" my_bisect_log.txt &&
 266         git bisect log > log_to_replay.txt &&
 267         git bisect reset
 268 '
 269
 270 test_expect_success 'bisect skip and bisect replay' '
 271         git bisect replay log_to_replay.txt > my_bisect_log.txt &&
 272         grep "$HASH5 is first bad commit" my_bisect_log.txt &&
 273         git bisect reset
 274 '
 275
 276 HASH6=
 277 test_expect_success 'bisect run & skip: cannot tell between 2' '
 278         add_line_into_file "6: Yet a line." hello &&
 279         HASH6=$(git rev-parse --verify HEAD) &&
 280         echo "#"\!"/bin/sh" > test_script.sh &&
 281         echo "sed -ne \\\$p hello | grep Ciao > /dev/null && exit 125" >> test_script.sh &&
 282         echo "grep line hello > /dev/null" >> test_script.sh &&
 283         echo "test \$? -ne 0" >> test_script.sh &&
 284         chmod +x test_script.sh &&
 285         git bisect start $HASH6 $HASH1 &&
 286         if git bisect run ./test_script.sh > my_bisect_log.txt
 287         then
 288                 echo Oops, should have failed.
 289                 false
 290         else
 291                 test $? -eq 2 &&
 292                 grep "first bad commit could be any of" my_bisect_log.txt &&
 293                 ! grep $HASH3 my_bisect_log.txt &&
 294                 ! grep $HASH6 my_bisect_log.txt &&
 295                 grep $HASH4 my_bisect_log.txt &&
 296                 grep $HASH5 my_bisect_log.txt
 297         fi
 298 '
 299
 300 HASH7=
 301 test_expect_success 'bisect run & skip: find first bad' '
 302         git bisect reset &&
 303         add_line_into_file "7: Should be the last line." hello &&
 304         HASH7=$(git rev-parse --verify HEAD) &&
 305         echo "#"\!"/bin/sh" > test_script.sh &&
 306         echo "sed -ne \\\$p hello | grep Ciao > /dev/null && exit 125" >> test_script.sh &&
 307         echo "sed -ne \\\$p hello | grep day > /dev/null && exit 125" >> test_script.sh &&
 308         echo "grep Yet hello > /dev/null" >> test_script.sh &&
 309         echo "test \$? -ne 0" >> test_script.sh &&
 310         chmod +x test_script.sh &&
 311         git bisect start $HASH7 $HASH1 &&
 312         git bisect run ./test_script.sh > my_bisect_log.txt &&
 313         grep "$HASH6 is first bad commit" my_bisect_log.txt
 314 '
 315
 316 test_expect_success 'bisect starting with a detached HEAD' '
 317
 318         git bisect reset &&
 319         git checkout master^ &&
 320         HEAD=$(git rev-parse --verify HEAD) &&
 321         git bisect start &&
 322         test $HEAD = $(cat .git/BISECT_START) &&
 323         git bisect reset &&
 324         test $HEAD = $(git rev-parse --verify HEAD)
 325 '
 326
 327 test_expect_success 'bisect errors out if bad and good are mistaken' '
 328         git bisect reset &&
 329         test_must_fail git bisect start $HASH2 $HASH4 2> rev_list_error &&
 330         grep "mistake good and bad" rev_list_error &&
 331         git bisect reset
 332 '
 333
 334 test_expect_success 'bisect does not create a "bisect" branch' '
 335         git bisect reset &&
 336         git bisect start $HASH7 $HASH1 &&
 337         git branch bisect &&
 338         rev_hash4=$(git rev-parse --verify HEAD) &&
 339         test "$rev_hash4" = "$HASH4" &&
 340         git branch -D bisect &&
 341         git bisect good &&
 342         git branch bisect &&
 343         rev_hash6=$(git rev-parse --verify HEAD) &&
 344         test "$rev_hash6" = "$HASH6" &&
 345         git bisect good > my_bisect_log.txt &&
 346         grep "$HASH7 is first bad commit" my_bisect_log.txt &&
 347         git bisect reset &&
 348         rev_hash6=$(git rev-parse --verify bisect) &&
 349         test "$rev_hash6" = "$HASH6" &&
 350         git branch -D bisect
 351 '
 352
 353 # This creates a "side" branch to test "siblings" cases.
 354 #
 355 # H1-H2-H3-H4-H5-H6-H7  <--other
 356 #            \
 357 #             S5-S6-S7  <--side
 358 #
 359 test_expect_success 'side branch creation' '
 360         git bisect reset &&
 361         git checkout -b side $HASH4 &&
 362         add_line_into_file "5(side): first line on a side branch" hello2 &&
 363         SIDE_HASH5=$(git rev-parse --verify HEAD) &&
 364         add_line_into_file "6(side): second line on a side branch" hello2 &&
 365         SIDE_HASH6=$(git rev-parse --verify HEAD) &&
 366         add_line_into_file "7(side): third line on a side branch" hello2 &&
 367         SIDE_HASH7=$(git rev-parse --verify HEAD)
 368 '
 369
 370 test_expect_success 'good merge base when good and bad are siblings' '
 371         git bisect start "$HASH7" "$SIDE_HASH7" > my_bisect_log.txt &&
 372         grep "merge base must be tested" my_bisect_log.txt &&
 373         grep $HASH4 my_bisect_log.txt &&
 374         git bisect good > my_bisect_log.txt &&
 375         test_must_fail grep "merge base must be tested" my_bisect_log.txt &&
 376         grep $HASH6 my_bisect_log.txt &&
 377         git bisect reset
 378 '
 379 test_expect_success 'skipped merge base when good and bad are siblings' '
 380         git bisect start "$SIDE_HASH7" "$HASH7" > my_bisect_log.txt &&
 381         grep "merge base must be tested" my_bisect_log.txt &&
 382         grep $HASH4 my_bisect_log.txt &&
 383         git bisect skip > my_bisect_log.txt 2>&1 &&
 384         grep "Warning" my_bisect_log.txt &&
 385         grep $SIDE_HASH6 my_bisect_log.txt &&
 386         git bisect reset
 387 '
 388
 389 test_expect_success 'bad merge base when good and bad are siblings' '
 390         git bisect start "$HASH7" HEAD > my_bisect_log.txt &&
 391         grep "merge base must be tested" my_bisect_log.txt &&
 392         grep $HASH4 my_bisect_log.txt &&
 393         test_must_fail git bisect bad > my_bisect_log.txt 2>&1 &&
 394         grep "merge base $HASH4 is bad" my_bisect_log.txt &&
 395         grep "fixed between $HASH4 and \[$SIDE_HASH7\]" my_bisect_log.txt &&
 396         git bisect reset
 397 '
 398
 399 # This creates a few more commits (A and B) to test "siblings" cases
 400 # when a good and a bad rev have many merge bases.
 401 #
 402 # We should have the following:
 403 #
 404 # H1-H2-H3-H4-H5-H6-H7
 405 #            \  \     \
 406 #             S5-A     \
 407 #              \        \
 408 #               S6-S7----B
 409 #
 410 # And there A and B have 2 merge bases (S5 and H5) that should be
 411 # reported by "git merge-base --all A B".
 412 #
 413 test_expect_success 'many merge bases creation' '
 414         git checkout "$SIDE_HASH5" &&
 415         git merge -m "merge HASH5 and SIDE_HASH5" "$HASH5" &&
 416         A_HASH=$(git rev-parse --verify HEAD) &&
 417         git checkout side &&
 418         git merge -m "merge HASH7 and SIDE_HASH7" "$HASH7" &&
 419         B_HASH=$(git rev-parse --verify HEAD) &&
 420         git merge-base --all "$A_HASH" "$B_HASH" > merge_bases.txt &&
 421         test $(wc -l < merge_bases.txt) = "2" &&
 422         grep "$HASH5" merge_bases.txt &&
 423         grep "$SIDE_HASH5" merge_bases.txt
 424 '
 425
 426 test_expect_success 'good merge bases when good and bad are siblings' '
 427         git bisect start "$B_HASH" "$A_HASH" > my_bisect_log.txt &&
 428         grep "merge base must be tested" my_bisect_log.txt &&
 429         git bisect good > my_bisect_log2.txt &&
 430         grep "merge base must be tested" my_bisect_log2.txt &&
 431         {
 432                 {
 433                         grep "$SIDE_HASH5" my_bisect_log.txt &&
 434                         grep "$HASH5" my_bisect_log2.txt
 435                 } || {
 436                         grep "$SIDE_HASH5" my_bisect_log2.txt &&
 437                         grep "$HASH5" my_bisect_log.txt
 438                 }
 439         } &&
 440         git bisect reset
 441 '
 442
 443 check_trace() {
 444         grep "$1" "$GIT_TRACE" | grep "\^$2" | grep "$3" >/dev/null
 445 }
 446
 447 test_expect_success 'optimized merge base checks' '
 448         GIT_TRACE="$(pwd)/trace.log" &&
 449         export GIT_TRACE &&
 450         git bisect start "$HASH7" "$SIDE_HASH7" > my_bisect_log.txt &&
 451         grep "merge base must be tested" my_bisect_log.txt &&
 452         grep "$HASH4" my_bisect_log.txt &&
 453         check_trace "rev-list" "$HASH7" "$SIDE_HASH7" &&
 454         git bisect good > my_bisect_log2.txt &&
 455         test -f ".git/BISECT_ANCESTORS_OK" &&
 456         test "$HASH6" = $(git rev-parse --verify HEAD) &&
 457         : > "$GIT_TRACE" &&
 458         git bisect bad > my_bisect_log3.txt &&
 459         test_must_fail check_trace "rev-list" "$HASH6" "$SIDE_HASH7" &&
 460         git bisect good "$A_HASH" > my_bisect_log4.txt &&
 461         grep "merge base must be tested" my_bisect_log4.txt &&
 462         test_must_fail test -f ".git/BISECT_ANCESTORS_OK" &&
 463         check_trace "rev-list" "$HASH6" "$A_HASH" &&
 464         unset GIT_TRACE
 465 '
 466
 467 #
 468 #
 469 test_done