t/t4107-apply-ignore-whitespace.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2009 Giuseppe Bilotta
   4 #
   5
   6 test_description='git-apply --ignore-whitespace.
   7
   8 '
   9 . ./test-lib.sh
  10
  11 # This primes main.c file that indents without using HT at all.
  12 # Various patches with HT and other spaces are attempted in the test.
  13
  14 cat > patch1.patch <<\EOF
  15 diff --git a/main.c b/main.c
  16 new file mode 100644
  17 --- /dev/null
  18 +++ b/main.c
  19 @@ -0,0 +1,22 @@
  20 +#include <stdio.h>
  21 +
  22 +void print_int(int num);
  23 +int func(int num);
  24 +
  25 +int main() {
  26 +       int i;
  27 +
  28 +       for (i = 0; i < 10; i++) {
  29 +               print_int(func(i)); /* stuff */
  30 +       }
  31 +
  32 +       return 0;
  33 +}
  34 +
  35 +int func(int num) {
  36 +       return num * num;
  37 +}
  38 +
  39 +void print_int(int num) {
  40 +       printf("%d", num);
  41 +}
  42 EOF
  43
  44 # Since whitespace is very significant and we want to prevent whitespace
  45 # mangling when creating this test from a patch, we protect 'fixable'
  46 # whitespace by replacing spaces with Z and replacing them at patch
  47 # creation time, hence the sed trick.
  48
  49 # This patch will fail unless whitespace differences are being ignored
  50
  51 sed -e 's/Z/ /g' > patch2.patch <<\EOF
  52 diff --git a/main.c b/main.c
  53 --- a/main.c
  54 +++ b/main.c
  55 @@ -10,6 +10,8 @@
  56 Z               print_int(func(i)); /* stuff */
  57 Z       }
  58 Z
  59 +       printf("\n");
  60 +
  61 Z       return 0;
  62 Z}
  63 Z
  64 EOF
  65
  66 # This patch will fail even if whitespace differences are being ignored,
  67 # because of the missing string at EOL. TODO: this testcase should be
  68 # improved by creating a line that has the same hash with and without
  69 # the final string.
  70
  71 sed -e 's/Z/ /g' > patch3.patch <<\EOF
  72 diff --git a/main.c b/main.c
  73 --- a/main.c
  74 +++ b/main.c
  75 @@ -10,3 +10,4 @@
  76 Z       for (i = 0; i < 10; i++) {
  77 Z               print_int(func(i));Z
  78 +               /* stuff */
  79 Z       }
  80 EOF
  81
  82 # This patch will fail even if whitespace differences are being ignored,
  83 # because of the missing EOL at EOF.
  84
  85 sed -e 's/Z/ /g' > patch4.patch <<\EOF
  86 diff --git a/main.c b/main.c
  87 --- a/main.c
  88 +++ b/main.c
  89 @@ -21,1 +21,1 @@
  90 -       };Z
  91 \ No newline at end of file
  92 +       };
  93 EOF
  94
  95 # This patch will fail unless whitespace differences are being ignored.
  96
  97 sed -e 's/Z/ /g' > patch5.patch <<\EOF
  98 diff --git a/main.c b/main.c
  99 --- a/main.c
 100 +++ b/main.c
 101 @@ -2,2 +2,3 @@
 102 Z       void print_int(int num);
 103 +       /* a comment */
 104 Z       int func(int num);
 105 EOF
 106
 107 # And this is how the final output should be.  Patches introduce
 108 # HTs but the original SP indents are mostly kept.
 109
 110 sed -e 's/T/    /g' > main.c.final <<\EOF
 111 #include <stdio.h>
 112
 113 void print_int(int num);
 114 T/* a comment */
 115 int func(int num);
 116
 117 int main() {
 118        int i;
 119
 120        for (i = 0; i < 10; i++) {
 121                print_int(func(i)); /* stuff */
 122        }
 123
 124 Tprintf("\n");
 125
 126        return 0;
 127 }
 128
 129 int func(int num) {
 130        return num * num;
 131 }
 132
 133 void print_int(int num) {
 134        printf("%d", num);
 135 }
 136 EOF
 137
 138 test_expect_success 'file creation' '
 139         git apply patch1.patch
 140 '
 141
 142 test_expect_success 'patch2 fails (retab)' '
 143         test_must_fail git apply patch2.patch
 144 '
 145
 146 test_expect_success 'patch2 applies with --ignore-whitespace' '
 147         git apply --ignore-whitespace patch2.patch
 148 '
 149
 150 test_expect_success 'patch2 reverse applies with --ignore-space-change' '
 151         git apply -R --ignore-space-change patch2.patch
 152 '
 153
 154 git config apply.ignorewhitespace change
 155
 156 test_expect_success 'patch2 applies (apply.ignorewhitespace = change)' '
 157         git apply patch2.patch
 158 '
 159
 160 test_expect_success 'patch3 fails (missing string at EOL)' '
 161         test_must_fail git apply patch3.patch
 162 '
 163
 164 test_expect_success 'patch4 fails (missing EOL at EOF)' '
 165         test_must_fail git apply patch4.patch
 166 '
 167
 168 test_expect_success 'patch5 applies (leading whitespace)' '
 169         git apply patch5.patch
 170 '
 171
 172 test_expect_success 'patches do not mangle whitespace' '
 173         test_cmp main.c main.c.final
 174 '
 175
 176 test_expect_success 're-create file (with --ignore-whitespace)' '
 177         rm -f main.c &&
 178         git apply patch1.patch
 179 '
 180
 181 test_expect_success 'patch5 fails (--no-ignore-whitespace)' '
 182         test_must_fail git apply --no-ignore-whitespace patch5.patch
 183 '
 184
 185 test_done