t/t4065-diff-anchored.sh

   1 #!/bin/sh
   2
   3 test_description='anchored diff algorithm'
   4
   5 TEST_PASSES_SANITIZE_LEAK=true
   6 . ./test-lib.sh
   7
   8 test_expect_success '--anchored' '
   9         printf "a\nb\nc\n" >pre &&
  10         printf "c\na\nb\n" >post &&
  11
  12         # normally, c is moved to produce the smallest diff
  13         test_expect_code 1 git diff --no-index pre post >diff &&
  14         grep "^+c" diff &&
  15
  16         # with anchor, a is moved
  17         test_expect_code 1 git diff --no-index --anchored=c pre post >diff &&
  18         grep "^+a" diff
  19 '
  20
  21 test_expect_success '--anchored multiple' '
  22         printf "a\nb\nc\nd\ne\nf\n" >pre &&
  23         printf "c\na\nb\nf\nd\ne\n" >post &&
  24
  25         # with 1 anchor, c is not moved, but f is moved
  26         test_expect_code 1 git diff --no-index --anchored=c pre post >diff &&
  27         grep "^+a" diff && # a is moved instead of c
  28         grep "^+f" diff &&
  29
  30         # with 2 anchors, c and f are not moved
  31         test_expect_code 1 git diff --no-index --anchored=c --anchored=f pre post >diff &&
  32         grep "^+a" diff &&
  33         grep "^+d" diff # d is moved instead of f
  34 '
  35
  36 test_expect_success '--anchored with nonexistent line has no effect' '
  37         printf "a\nb\nc\n" >pre &&
  38         printf "c\na\nb\n" >post &&
  39
  40         test_expect_code 1 git diff --no-index --anchored=x pre post >diff &&
  41         grep "^+c" diff
  42 '
  43
  44 test_expect_success '--anchored with non-unique line has no effect' '
  45         printf "a\nb\nc\nd\ne\nc\n" >pre &&
  46         printf "c\na\nb\nc\nd\ne\n" >post &&
  47
  48         test_expect_code 1 git diff --no-index --anchored=c pre post >diff &&
  49         grep "^+c" diff
  50 '
  51
  52 test_expect_success 'diff still produced with impossible multiple --anchored' '
  53         printf "a\nb\nc\n" >pre &&
  54         printf "c\na\nb\n" >post &&
  55
  56         test_expect_code 1 git diff --no-index --anchored=a --anchored=c pre post >diff &&
  57         mv post expected_post &&
  58
  59         # Ensure that the diff is correct by applying it and then
  60         # comparing the result with the original
  61         git apply diff &&
  62         diff expected_post post
  63 '
  64
  65 test_expect_success 'later algorithm arguments override earlier ones' '
  66         printf "a\nb\nc\n" >pre &&
  67         printf "c\na\nb\n" >post &&
  68
  69         test_expect_code 1 git diff --no-index --patience --anchored=c pre post >diff &&
  70         grep "^+a" diff &&
  71
  72         test_expect_code 1 git diff --no-index --anchored=c --patience pre post >diff &&
  73         grep "^+c" diff &&
  74
  75         test_expect_code 1 git diff --no-index --histogram --anchored=c pre post >diff &&
  76         grep "^+a" diff &&
  77
  78         test_expect_code 1 git diff --no-index --anchored=c --histogram pre post >diff &&
  79         grep "^+c" diff
  80 '
  81
  82 test_expect_success '--anchored works with other commands like "git show"' '
  83         printf "a\nb\nc\n" >file &&
  84         git add file &&
  85         git commit -m foo &&
  86         printf "c\na\nb\n" >file &&
  87         git add file &&
  88         git commit -m foo &&
  89
  90         # with anchor, a is moved
  91         git show --patience --anchored=c >diff &&
  92         grep "^+a" diff
  93 '
  94
  95 test_done