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git-commit-vandalism/t/t4034-diff-words.sh
Martin Ågren c76b84a121 t: don't spuriously close and reopen quotes 
In the test scripts, the recommended style is, e.g.:

    test_expect_success 'name' '
        do-something somehow &&
        do-some-more testing
    '

When using this style, any single quote in the multi-line test section
is actually closing the lone single quotes that surround it.

It can be a non-issue in practice:

    test_expect_success 'sed a little' '
        sed -e 's/hi/lo/' in >out # "ok": no whitespace in s/hi/lo/
    '

Or it can be a bug in the test, e.g., because variable interpolation
happens before the test even begins executing:

    v=abc

    test_expect_success 'variable interpolation' '
        v=def &&
        echo '"$v"' # abc
    '

Change several such in-test single quotes to use double quotes instead
or, in a few cases, drop them altogether. These were identified using
some crude grepping. We're not fixing any test bugs here, but we're
hopefully making these tests slightly easier to grok and to maintain.

There are legitimate use cases for closing a quote and opening a new
one, e.g., both '\'' and '"'"' can be used to produce a literal single
quote. I'm not touching any of those here.

In t9401, tuck the redirecting ">" to the filename while we're touching
those lines.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-06 15:14:32 -07:00

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#!/bin/sh
test_description='word diff colors'
. ./test-lib.sh
. "$TEST_DIRECTORY"/diff-lib.sh
cat >pre.simple <<-\EOF
h(4)
a = b + c
EOF
cat >post.simple <<-\EOF
h(4),hh[44]
a = b + c
aa = a
aeff = aeff * ( aaa )
EOF
pre=$(git rev-parse --short $(git hash-object pre.simple))
post=$(git rev-parse --short $(git hash-object post.simple))
cat >expect.letter-runs-are-words <<-EOF
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index $pre..$post 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1,3 +1,7 @@<RESET>
h(4),<GREEN>hh<RESET>[44]
a = b + c<RESET>
<GREEN>aa = a<RESET>
<GREEN>aeff = aeff * ( aaa<RESET> )
EOF
cat >expect.non-whitespace-is-word <<-EOF
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index $pre..$post 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1,3 +1,7 @@<RESET>
h(4)<GREEN>,hh[44]<RESET>
a = b + c<RESET>
<GREEN>aa = a<RESET>
<GREEN>aeff = aeff * ( aaa )<RESET>
EOF
word_diff () {
pre=$(git rev-parse --short $(git hash-object pre)) &&
post=$(git rev-parse --short $(git hash-object post)) &&
test_must_fail git diff --no-index "$@" pre post >output &&
test_decode_color <output >output.decrypted &&
sed -e "2s/index [^ ]*/index $pre..$post/" expect >expected
test_cmp expected output.decrypted
}
test_language_driver () {
lang=$1
test_expect_success "diff driver '$lang'" '
cp "$TEST_DIRECTORY/t4034/'"$lang"'/pre" \
"$TEST_DIRECTORY/t4034/'"$lang"'/post" \
"$TEST_DIRECTORY/t4034/'"$lang"'/expect" . &&
echo "* diff='"$lang"'" >.gitattributes &&
word_diff --color-words
'
}
test_expect_success setup '
git config diff.color.old red &&
git config diff.color.new green &&
git config diff.color.func magenta
'
test_expect_success 'set up pre and post with runs of whitespace' '
cp pre.simple pre &&
cp post.simple post
'
test_expect_success 'word diff with runs of whitespace' '
cat >expect <<-EOF &&
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index $pre..$post 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1,3 +1,7 @@<RESET>
<RED>h(4)<RESET><GREEN>h(4),hh[44]<RESET>
a = b + c<RESET>
<GREEN>aa = a<RESET>
<GREEN>aeff = aeff * ( aaa )<RESET>
EOF
word_diff --color-words &&
word_diff --word-diff=color &&
word_diff --color --word-diff=color
'
test_expect_success '--word-diff=porcelain' '
sed "s/#.*$//" >expect <<-EOF &&
diff --git a/pre b/post
index $pre..$post 100644
--- a/pre
+++ b/post
@@ -1,3 +1,7 @@
-h(4)
+h(4),hh[44]
~
# significant space
~
a = b + c
~
~
+aa = a
~
~
+aeff = aeff * ( aaa )
~
EOF
word_diff --word-diff=porcelain
'
test_expect_success '--word-diff=plain' '
cat >expect <<-EOF &&
diff --git a/pre b/post
index $pre..$post 100644
--- a/pre
+++ b/post
@@ -1,3 +1,7 @@
[-h(4)-]{+h(4),hh[44]+}
a = b + c
{+aa = a+}
{+aeff = aeff * ( aaa )+}
EOF
word_diff --word-diff=plain &&
word_diff --word-diff=plain --no-color
'
test_expect_success '--word-diff=plain --color' '
cat >expect <<-EOF &&
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index $pre..$post 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1,3 +1,7 @@<RESET>
<RED>[-h(4)-]<RESET><GREEN>{+h(4),hh[44]+}<RESET>
a = b + c<RESET>
<GREEN>{+aa = a+}<RESET>
<GREEN>{+aeff = aeff * ( aaa )+}<RESET>
EOF
word_diff --word-diff=plain --color
'
test_expect_success 'word diff without context' '
cat >expect <<-EOF &&
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index $pre..$post 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1 +1 @@<RESET>
<RED>h(4)<RESET><GREEN>h(4),hh[44]<RESET>
<CYAN>@@ -3,0 +4,4 @@<RESET> <RESET><MAGENTA>a = b + c<RESET>
<GREEN>aa = a<RESET>
<GREEN>aeff = aeff * ( aaa )<RESET>
EOF
word_diff --color-words --unified=0
'
test_expect_success 'word diff with a regular expression' '
cp expect.letter-runs-are-words expect &&
word_diff --color-words="[a-z]+"
'
test_expect_success 'set up a diff driver' '
git config diff.testdriver.wordRegex "[^[:space:]]" &&
cat <<-\EOF >.gitattributes
pre diff=testdriver
post diff=testdriver
EOF
'
test_expect_success 'option overrides .gitattributes' '
cp expect.letter-runs-are-words expect &&
word_diff --color-words="[a-z]+"
'
test_expect_success 'use regex supplied by driver' '
cp expect.non-whitespace-is-word expect &&
word_diff --color-words
'
test_expect_success 'set up diff.wordRegex option' '
git config diff.wordRegex "[[:alnum:]]+"
'
test_expect_success 'command-line overrides config' '
cp expect.letter-runs-are-words expect &&
word_diff --color-words="[a-z]+"
'
test_expect_success 'command-line overrides config: --word-diff-regex' '
cat >expect <<-EOF &&
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index $pre..$post 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1,3 +1,7 @@<RESET>
h(4),<GREEN>{+hh+}<RESET>[44]
a = b + c<RESET>
<GREEN>{+aa = a+}<RESET>
<GREEN>{+aeff = aeff * ( aaa+}<RESET> )
EOF
word_diff --color --word-diff-regex="[a-z]+"
'
test_expect_success '.gitattributes override config' '
cp expect.non-whitespace-is-word expect &&
word_diff --color-words
'
test_expect_success 'setup: remove diff driver regex' '
test_unconfig diff.testdriver.wordRegex
'
test_expect_success 'use configured regex' '
cat >expect <<-EOF &&
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index $pre..$post 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1,3 +1,7 @@<RESET>
h(4),<GREEN>hh[44<RESET>]
a = b + c<RESET>
<GREEN>aa = a<RESET>
<GREEN>aeff = aeff * ( aaa<RESET> )
EOF
word_diff --color-words
'
test_expect_success 'test parsing words for newline' '
echo "aaa (aaa)" >pre &&
echo "aaa (aaa) aaa" >post &&
pre=$(git rev-parse --short $(git hash-object pre)) &&
post=$(git rev-parse --short $(git hash-object post)) &&
cat >expect <<-EOF &&
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index $pre..$post 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1 +1 @@<RESET>
aaa (aaa) <GREEN>aaa<RESET>
EOF
word_diff --color-words="a+"
'
test_expect_success 'test when words are only removed at the end' '
echo "(:" >pre &&
echo "(" >post &&
pre=$(git rev-parse --short $(git hash-object pre)) &&
post=$(git rev-parse --short $(git hash-object post)) &&
cat >expect <<-EOF &&
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index $pre..$post 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1 +1 @@<RESET>
(<RED>:<RESET>
EOF
word_diff --color-words=.
'
test_expect_success '--word-diff=none' '
echo "(:" >pre &&
echo "(" >post &&
pre=$(git rev-parse --short $(git hash-object pre)) &&
post=$(git rev-parse --short $(git hash-object post)) &&
cat >expect <<-EOF &&
diff --git a/pre b/post
index $pre..$post 100644
--- a/pre
+++ b/post
@@ -1 +1 @@
-(:
+(
EOF
word_diff --word-diff=plain --word-diff=none
'
test_expect_success 'unset default driver' '
test_unconfig diff.wordregex
'
test_language_driver ada
test_language_driver bibtex
test_language_driver cpp
test_language_driver csharp
test_language_driver css
test_language_driver dts
test_language_driver fortran
test_language_driver html
test_language_driver java
test_language_driver matlab
test_language_driver objc
test_language_driver pascal
test_language_driver perl
test_language_driver php
test_language_driver python
test_language_driver ruby
test_language_driver tex
test_expect_success 'word-diff with diff.sbe' '
cat >pre <<-\EOF &&
a
b
EOF
cat >post <<-\EOF &&
a
c
EOF
pre=$(git rev-parse --short $(git hash-object pre)) &&
post=$(git rev-parse --short $(git hash-object post)) &&
cat >expect <<-EOF &&
diff --git a/pre b/post
index $pre..$post 100644
--- a/pre
+++ b/post
@@ -1,3 +1,3 @@
a
[-b-]{+c+}
EOF
test_config diff.suppress-blank-empty true &&
word_diff --word-diff=plain
'
test_expect_success 'word-diff with no newline at EOF' '
printf "%s" "a a a a a" >pre &&
printf "%s" "a a ab a a" >post &&
pre=$(git rev-parse --short $(git hash-object pre)) &&
post=$(git rev-parse --short $(git hash-object post)) &&
cat >expect <<-EOF &&
diff --git a/pre b/post
index $pre..$post 100644
--- a/pre
+++ b/post
@@ -1 +1 @@
a a [-a-]{+ab+} a a
EOF
word_diff --word-diff=plain
'
test_expect_success 'setup history with two files' '
echo "a b; c" >a.tex &&
echo "a b; c" >z.txt &&
git add a.tex z.txt &&
git commit -minitial &&
# modify both
echo "a bx; c" >a.tex &&
echo "a bx; c" >z.txt &&
git commit -mmodified -a
'
test_expect_success 'wordRegex for the first file does not apply to the second' '
echo "*.tex diff=tex" >.gitattributes &&
test_config diff.tex.wordRegex "[a-z]+|." &&
cat >expect <<-\EOF &&
diff --git a/a.tex b/a.tex
--- a/a.tex
+++ b/a.tex
@@ -1 +1 @@
a [-b-]{+bx+}; c
diff --git a/z.txt b/z.txt
--- a/z.txt
+++ b/z.txt
@@ -1 +1 @@
a [-b;-]{+bx;+} c
EOF
git diff --word-diff HEAD~ >actual &&
compare_diff_patch expect actual
'
test_done
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