t/t8011-blame-split-file.sh

   1 #!/bin/sh
   2
   3 test_description='
   4 The general idea is that we have a single file whose lines come from
   5 multiple other files, and those individual files were modified in the same
   6 commits. That means that we will see the same commit in multiple contexts,
   7 and each one should be attributed to the correct file.
   8
   9 Note that we need to use "blame -C" to find the commit for all lines. We will
  10 not bother testing that the non-C case fails to find it. That is how blame
  11 behaves now, but it is not a property we want to make sure is retained.
  12 '
  13 . ./test-lib.sh
  14
  15 # help avoid typing and reading long strings of similar lines
  16 # in the tests below
  17 generate_expect () {
  18         while read nr data
  19         do
  20                 i=0
  21                 while test $i -lt $nr
  22                 do
  23                         echo $data
  24                         i=$((i + 1))
  25                 done
  26         done
  27 }
  28
  29 test_expect_success 'setup split file case' '
  30         # use lines long enough to trigger content detection
  31         test_seq 1000 1010 >one &&
  32         test_seq 2000 2010 >two &&
  33         git add one two &&
  34         test_commit base &&
  35
  36         sed "6s/^/modified /" <one >one.tmp &&
  37         mv one.tmp one &&
  38         sed "6s/^/modified /" <two >two.tmp &&
  39         mv two.tmp two &&
  40         git add -u &&
  41         test_commit modified &&
  42
  43         cat one two >combined &&
  44         git add combined &&
  45         git rm one two &&
  46         test_commit combined
  47 '
  48
  49 test_expect_success 'setup simulated porcelain' '
  50         # This just reads porcelain-ish output and tries
  51         # to output the value of a given field for each line (either by
  52         # reading the field that accompanies this line, or referencing
  53         # the information found last time the commit was mentioned).
  54         cat >read-porcelain.pl <<-\EOF
  55         my $field = shift;
  56         while (<>) {
  57                 if (/^[0-9a-f]{40} /) {
  58                         flush();
  59                         $hash = $&;
  60                 } elsif (/^$field (.*)/) {
  61                         $cache{$hash} = $1;
  62                 }
  63         }
  64         flush();
  65
  66         sub flush {
  67                 return unless defined $hash;
  68                 if (defined $cache{$hash}) {
  69                         print "$cache{$hash}\n";
  70                 } else {
  71                         print "NONE\n";
  72                 }
  73         }
  74         EOF
  75 '
  76
  77 for output in porcelain line-porcelain
  78 do
  79         test_expect_success "generate --$output output" '
  80                 git blame --root -C --$output combined >output
  81         '
  82
  83         test_expect_success "$output output finds correct commits" '
  84                 generate_expect >expect <<-\EOF &&
  85                 5 base
  86                 1 modified
  87                 10 base
  88                 1 modified
  89                 5 base
  90                 EOF
  91                 perl read-porcelain.pl summary <output >actual &&
  92                 test_cmp expect actual
  93         '
  94
  95         test_expect_success "$output output shows correct filenames" '
  96                 generate_expect >expect <<-\EOF &&
  97                 11 one
  98                 11 two
  99                 EOF
 100                 perl read-porcelain.pl filename <output >actual &&
 101                 test_cmp expect actual
 102         '
 103
 104         test_expect_success "$output output shows correct previous pointer" '
 105                 generate_expect >expect <<-EOF &&
 106                 5 NONE
 107                 1 $(git rev-parse modified^) one
 108                 10 NONE
 109                 1 $(git rev-parse modified^) two
 110                 5 NONE
 111                 EOF
 112                 perl read-porcelain.pl previous <output >actual &&
 113                 test_cmp expect actual
 114         '
 115 done
 116
 117 test_done