1 #!/bin/sh
2 
3 diff_prog="../diff/diff"
4 
5 # At present, test015 only passes with GNU patch.
6 # Larry's patch has a bug with empty files in combination with -R...
7 if which gpatch > /dev/null; then
8 	patch_prog="gpatch"
9 else
10 	patch_prog="patch"
11 fi
12 
13 diff_type=unidiff
14 
15 verify_diff_script() {
16 	orig_left="$1"
17 	orig_right="$2"
18 	the_diff="$3"
19 	expected_diff="$4"
20 	diff_opts="$5"
21 
22 	if echo -- $diff_opts | grep -q -- '-w'; then
23 		ignore_whitespace="true"
24 	else
25 		ignore_whitespace=""
26 	fi
27 	verify_left="verify.$orig_left"
28 	verify_right="verify.$orig_right"
29 
30         if [ -e "$expected_diff" ]; then
31 		echo cmp "$got_diff" "$expected_diff"
32                 if ! cmp "$got_diff" "$expected_diff" ; then
33                         echo "FAIL: $got_diff != $expected_diff"
34                         return 1
35                 fi
36 	fi
37         if [ -z "$ignore_whitespace" -a "x$diff_type" = "xunidiff" ]; then
38                 cp "$orig_left" "$verify_right"
39                 $patch_prog --quiet -u "$verify_right" "$the_diff"
40                 if ! cmp "$orig_right" "$verify_right" ; then
41                         echo "FAIL: $orig_right != $verify_right"
42                         return 1
43                 fi
44 
45                 cp "$orig_right" "$verify_left"
46                 $patch_prog --quiet -u -R "$verify_left" "$the_diff"
47                 if ! cmp "$orig_left" "$verify_left" ; then
48                         echo "FAIL: $orig_left != $verify_left"
49                         return 1
50                 fi
51         elif [ -z "$ignore_whitespace" ]; then
52                 tail -n +3 "$the_diff" | grep -v "^+" | sed 's/^.//' > "$verify_left"
53                 tail -n +3 "$the_diff" | grep -v "^-" | sed 's/^.//' > "$verify_right"
54 
55                 if ! cmp "$orig_left" "$verify_left" ; then
56                         echo "FAIL: $orig_left != $verify_left"
57                         return 1
58                 fi
59                 if ! cmp "$orig_right" "$verify_right" ; then
60                         echo "FAIL: $orig_right != $verify_right"
61                         return 1
62                 fi
63         fi
64         echo "OK: $diff_prog $orig_left $orig_right"
65         return 0
66 }
67 
68 for left in test*.left* ; do
69         right="$(echo "$left" | sed 's/\.left/\.right/')"
70         diff_opts="$(echo "$left" | sed 's/test[0-9]*\.left\([-a-zA-Z0-9]*\).txt/\1/')"
71         expected_diff="$(echo "$left" | sed 's/test\([-0-9a-zA-Z]*\)\..*/expect\1.diff/')"
72         got_diff="verify.$expected_diff"
73 
74         "$diff_prog" $diff_opts "$left" "$right" > "$got_diff"
75 
76         set -e
77 	verify_diff_script "$left" "$right" "$got_diff" "$expected_diff" "$diff_opts"
78         set +e
79 done