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-rwxr-xr-xt/t4034-diff-words.sh412
1 files changed, 412 insertions, 0 deletions
diff --git a/t/t4034-diff-words.sh b/t/t4034-diff-words.sh
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@@ -0,0 +1,412 @@
+#!/bin/sh
+
+test_description='word diff colors'
+
+TEST_PASSES_SANITIZE_LEAK=true
+. ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-diff.sh
+
+cat >pre.simple <<-\EOF
+ h(4)
+
+ a = b + c
+EOF
+cat >post.simple <<-\EOF
+ h(4),hh[44]
+
+ a = b + c
+
+ aa = a
+
+ aeff = aeff * ( aaa )
+EOF
+pre=$(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 'word diff with zero length matches' '
+ cp expect.letter-runs-are-words expect &&
+ word_diff --color-words="[a-z${LF}]*"
+'
+
+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 kotlin
+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 scheme
+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