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git/t/t4055-diff-context.sh
Junio C Hamano 50fb51e7e8 t4055: avoid use of sed 'a' command
The 'a', 'i' and 'c' commands take a literal text to be added
followed by backslash, but then in the source we cannot indent
the literal text which makes it ugly.

We need to also remember to double the backslash inside double
quotes.

Avoid these issues altogether by having an extra line in a template
file and generate test vectors by deleting the line or replacing the
line and not using the 'a' command.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-10-02 12:05:38 -07:00

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#!/bin/sh
#
# Copyright (c) 2012 Mozilla Foundation
#
test_description='diff.context configuration'
. ./test-lib.sh
test_expect_success 'setup' '
cat >template <<-\EOF &&
firstline
b
c
d
e
f
preline
TARGET
postline
i
j
k
l
m
n
EOF
sed "/TARGET/d" >x <template &&
git update-index --add x &&
git commit -m initial &&
sed "s/TARGET/ADDED/" >x <template &&
git update-index --add x &&
git commit -m next &&
sed "s/TARGET/MODIFIED/" >x <template
'
test_expect_success 'the default number of context lines is 3' '
git diff >output &&
! grep "^ d" output &&
grep "^ e" output &&
grep "^ j" output &&
! grep "^ k" output
'
test_expect_success 'diff.context honored by "log"' '
git log -1 -p >output &&
! grep firstline output &&
git config diff.context 8 &&
git log -1 -p >output &&
grep "^ firstline" output
'
test_expect_success 'The -U option overrides diff.context' '
git config diff.context 8 &&
git log -U4 -1 >output &&
! grep "^ firstline" output
'
test_expect_success 'diff.context honored by "diff"' '
git config diff.context 8 &&
git diff >output &&
grep "^ firstline" output
'
test_expect_success 'plumbing not affected' '
git config diff.context 8 &&
git diff-files -p >output &&
! grep "^ firstline" output
'
test_expect_success 'non-integer config parsing' '
git config diff.context no &&
test_must_fail git diff 2>output &&
test_i18ngrep "bad config value" output
'
test_expect_success 'negative integer config parsing' '
git config diff.context -1 &&
test_must_fail git diff 2>output &&
test_i18ngrep "bad config file" output
'
test_expect_success '-U0 is valid, so is diff.context=0' '
git config diff.context 0 &&
git diff >output &&
grep "^-ADDED" output &&
grep "^+MODIFIED" output
'
test_done