Blame tests/p_diffutils/20-diff-tests

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#!/bin/bash
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# Author: Iain Douglas <centos@1n6.org.uk>
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# Tests for diff
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# Basic Tests
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ExitFail() {
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    t_Log "FAIL"
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    exit $FAIL
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}
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t_Log "Running $0 - diff tests"
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diff -v &>/dev/null 
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t_CheckExitStatus $?
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F1=/var/tmp/testf1.txt
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F2=/var/tmp/testf2.txt
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# Most of the following tests are taken from the examples in the info 
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# documentation for diffutils.
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# 
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# Create a couple of files to work with. We'll use sed to make changes as we
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# go.
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TEXT="Here lyeth  muche rychnesse  in lytell space.   -- John Heywood" 
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echo $TEXT >$F1
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cp $F1 $F2
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# Start by checking the options that determine how whitespace and case are
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# handled -E -b -w -B -i -I -q and their long form variants
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# Baseline check to ensure diff sees the files are the same.
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echo "Check files are the same"
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diff $F1 $F2
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t_CheckExitStatus $?
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# Convert a <space> to <space><tab> in F2 then check that diff sees the change
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# as it should.
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sed -i 's/ / \t/' $F2
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echo "Check different files"
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diff $F1 $F2  &>/dev/null && ExitFail
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t_Log "PASS"
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# Convert the first space in $F1 to 4 spaces and check that -E and  
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# --ignore-tab-expansion works and sees no difference between the 
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# two files.
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echo "Check diff -E"
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sed -i 's/ /    /' $F1
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diff -E $F1 $F2
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t_CheckExitStatus $?
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echo "Check diff --ignore-tab-expansion"
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diff --ignore-tab-expansion $F1 $F2
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t_CheckExitStatus $?
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# reduce the 4 spaces to 3 and check diff -E sees a difference
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echo "Check diff -E sees a difference in whitespace"
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sed -i 's/    /   /' $F1
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diff -E $F1 $F2 &>/dev/null && ExitFail
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t_Log "PASS"
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# Check -b --ignore-space-change add some spaces to the end of the line
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# to make sure.
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sed -i 's/$/    /' $F1
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echo "Check diff -b"  
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diff -b $F1 $F2
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t_CheckExitStatus $?
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echo "Check diff --ignore-space-change"
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diff --ignore-space-change $F1 $F2
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t_CheckExitStatus $?
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# The -b option ignotes difference in whitespace where it already exists.
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# Check that whitespace added in $F1 where non exists in $F2 is caught by 
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# -b
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echo "Check diff -b sees whitespace where non exists"
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sed -i 's/ss/s s/' $F1
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diff -b $F1 $F2 &>/dev/null && ExitFail
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t_Log "PASS"
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# Check -w --ignore-all-space
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echo "Check diff -w"
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diff -w $F1 $F2
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t_CheckExitStatus $?
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echo "Check diff --ignore-all-space"
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diff --ignore-all-space $F1 $F2
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t_CheckExitStatus $?
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# Check -B --ignore blank lines, create some new files to work with first.
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echo $TEXT>$F1
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echo $TEXT>>$F1
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echo $TEXT>$F2
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echo "" >>$F2
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echo $TEXT>>$F2
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# Check that diff sees the new test files are different.
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echo "-B --ignore blank lines, pre check files are different"
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diff $F1 $F2 &>/dev/null && ExitFail
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t_Log "PASS"
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echo "Check diff -B"
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diff -B $F1 $F2
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t_CheckExitStatus $?
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echo "Check diff --ignore-blank-lines"
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diff --ignore-blank-lines $F1 $F2
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t_CheckExitStatus $? 
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# Check -i --ignore-case, first ensure that diff sees a difference in case,
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# as we're using the files from the earlier test we need to use the -B option
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# too.
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echo "Check test file is different"
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sed -i 's/l/L/g' $F1
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diff -B $F1 $F2 &>/dev/null && ExitFail
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t_Log "PASS"
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# Check that -i causes  diff to ignore the difference in case.
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echo "Check diff -i"
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diff -B -i $F1 $F2
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t_CheckExitStatus $?
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echo "Check diff --ignore-case"
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diff -B --ignore-case $F1 $F2
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t_CheckExitStatus $?
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# Check -I --ignore-matching-lines=regexp
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echo $TEXT >$F1
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echo "1"$TEXT"1" >>$F1
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echo "1"$TEXT >$F2
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echo $TEXT >>$F2
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echo "Check test files are different"
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diff $F1 $F2 &>/dev/null && ExitFail
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t_Log "PASS"
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echo "Check -I"
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diff -I '^[[:digit:]]'  $F1 $F2
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t_CheckExitStatus $?
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echo "Check --ignore-matching-lines=regexp"
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diff --ignore-matching-lines='^[[:digit:]]' $F1 $F2
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t_CheckExitStatus $?
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# Check -q --brief
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echo "Check diff -q"
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diff -q $F1 $F2 | grep -q "Files /var/tmp/testf1.txt and /var/tmp/testf2.txt differ" 
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t_CheckExitStatus $?
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echo "diff --brief"
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diff --brief $F1 $F2 | grep -q "Files /var/tmp/testf1.txt and /var/tmp/testf2.txt differ"
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t_CheckExitStatus $?
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# Check output formats are correct, again the examples from the info docs are
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# used in the tests as are the lao and tzu texts. As we've previously testes 
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# cmp it should be safe to use to compare the generated output against known 
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# correct output.
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#
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# start with normal format
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echo "Check diff output formats"
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DIR=./tests/p_diffutils
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FILES="$DIR"/files
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echo "Check normal output format"
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diff "$FILES"/lao "$FILES"/tzu | cmp "$FILES"/normal_format -
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t_CheckExitStatus $?
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# Check contxt format - note that this outputs time information that we will
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# ignore by skipping the first 3 lines
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echo Check default context format -c
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diff -c "$FILES"/lao "$FILES"/tzu | tail -n +3 | cmp "$FILES"/context_format -
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t_CheckExitStatus $? 
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# Check contect format with only 1 line 
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echo "Check context format with Less Context -C 1"
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diff  -C 1 "$FILES"/lao "$FILES"/tzu | tail -n +3 | cmp "$FILES"/context_format-1 -
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t_CheckExitStatus $?
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# Check unified format again there are timestams which we will ignore
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echo "Check unified format "
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diff  -u "$FILES"/lao "$FILES"/tzu | tail -n +3 | cmp "$FILES"/unified_format -
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t_CheckExitStatus $?
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# Check unified shortend format -U lines and the long form option 
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# --unified=lines, in both cases we'll use 1 for lines.
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echo "Check unified output with less context -U 1"
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diff  -U 1 "$FILES"/lao "$FILES"/tzu | tail -n +3 | cmp "$FILES"/unified_format-1 -
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t_CheckExitStatus $?
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echo "Check unified output with less context --unified=1"
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diff  --unified=1 "$FILES"/lao "$FILES"/tzu | tail -n +3 | cmp "$FILES"/unified_format-1 -
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t_CheckExitStatus $?
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# Check we can change the labels
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echo "Check the --label option"
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diff -C 2 --label=original --label=modified "$FILES"/lao "$FILES"/tzu | cmp "$FILES"/label-change
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t_CheckExitStatus $?
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# Check side-by-side output width = 72
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echo "Check side-by-side" output -y -W 72
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diff -t -y -W 72 "$FILES"/lao "$FILES"/tzu | cmp "$FILES"/side-by-side-W72 -
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t_CheckExitStatus $?
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# Check side-by-side with left column suppression
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echo "Check left column suppression in side-by-side output"
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diff --width=72 -y --left-column "$FILES"/lao "$FILES"/tzu | cmp "$FILES"/left_column 
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t_CheckExitStatus $?
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# Check side-by-side with common line  suppression
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echo "Check left column suppression in side-by-side output"
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diff --width=72 -y --suppress-common-lines "$FILES"/lao "$FILES"/tzu | cmp "$FILES"/supress_common_lines -
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t_CheckExitStatus $?
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# Check an ed script is correctly generated
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echo "Check an ed script is correctly generated diff -e"
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diff -e "$FILES"/lao "$FILES"/tzu | cmp "$FILES"/ed_script -
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t_CheckExitStatus $?
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# Check diff -f --forward-ed works
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echo "Check that a forward ed script is generated -f "
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diff -f "$FILES"/lao "$FILES"/tzu | cmp "$FILES"/ed_script-f -
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t_CheckExitStatus $?
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echo "Check that a forward ed script is generated --forward-ed "
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diff --forward-ed "$FILES"/lao "$FILES"/tzu | cmp "$FILES"/ed_script-f -
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t_CheckExitStatus $?
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# Check RCS script generation -n --rcs
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echo "Check RCS scripts are generated -n"
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diff -n "$FILES"/lao "$FILES"/tzu | cmp "$FILES"/rcs_script -
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t_CheckExitStatus $?
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echo "Check RCS scripts are generated --rcs"
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diff --rcs "$FILES"/lao "$FILES"/tzu | cmp "$FILES"/rcs_script -
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t_CheckExitStatus $?
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# Check if-then-else output diff -D --ifdef
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echo "Check -D output"
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diff -DTWO "$FILES"/lao "$FILES"/tzu | cmp "$FILES"/if_then_else -
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t_CheckExitStatus $? 
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echo "Check --ifdef output"
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diff --ifdef=TWO "$FILES"/lao "$FILES"/tzu | cmp "$FILES"/if_then_else -
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t_CheckExitStatus $?
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# Check Incomplete last line (no \n)
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echo "Checking incomplete last line - normal"
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diff "$FILES"/F "$FILES"/G | cmp "$FILES"/F-G -
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t_CheckExitStatus $?
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echo "Checking incomplete last line -n"
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diff -n "$FILES"/F "$FILES"/G | cmp "$FILES"/n_F-G -
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t_CheckExitStatus $?
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echo "Checking incomplete last line -e"
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diff -e "$FILES"/F "$FILES"/G 2>&1  | cmp "$FILES"/e_F-G
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t_CheckExitStatus $?
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# Check diff output to -l --paginate, the header is variable so skip over it
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echo "Check diff output to pager -l"
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diff -l "$FILES"/lao "$FILES"/tzu |tail -n +4 | cmp "$FILES"/paginate -
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t_CheckExitStatus $?
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echo "Check diff output to pager -l"
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diff -l "$FILES"/lao "$FILES"/tzu | tail -n +4 | cmp "$FILES"/paginate -
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t_CheckExitStatus $?
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# Directories tested from here down
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# Setup a directory structure and populate it with files to work with
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#
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DIRTEST=/var/tmp/difftest
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[[ -d "$DIRTEST" ]] && rm -r "$DIRTEST"
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mkdir "$DIRTEST"
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mkdir -p "$DIRTEST"/a/1
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mkdir -p "$DIRTEST"/b/1
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cp "$FILES"/lao "$DIRTEST"/a 
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cp "$FILES"/lao "$DIRTEST"/b
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cp "$FILES"/tzu "$DIRTEST"/a
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cp "$FILES"/tao "$DIRTEST"/a/1
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# Check plain diff of 2 directories
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echo "Check basic directory comparison"
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diff "$DIRTEST"/a "$DIRTEST"/b | cmp "$FILES"/dir -
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t_CheckExitStatus $?
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# Check -s --report-identical-files
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echo "Check identical files reported -s"
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diff -s "$DIRTEST"/a "$DIRTEST"/b | cmp "$FILES"/dir_s -
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t_CheckExitStatus $?
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echo "Check identical files reported --report-identical-files"
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diff --report-identical-files "$DIRTEST"/a "$DIRTEST"/b | cmp "$FILES"/dir_s -
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t_CheckExitStatus $?
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# Check recursive directory diff
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echo "Check recursive directory diff -r"
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diff -sr "$DIRTEST"/a "$DIRTEST"/b | cmp "$FILES"/dir_r -
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t_CheckExitStatus $?
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echo "Check recursive directory diff --recursive"
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diff -s --recursive "$DIRTEST"/a "$DIRTEST"/b | cmp "$FILES"/dir_r -
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t_CheckExitStatus $?
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# Check -N --new-file output
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echo "Check directory diff -N"
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diff -Nsr "$DIRTEST"/a "$DIRTEST"/b | cmp "$FILES"/dir_N -
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t_CheckExitStatus $?
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echo "Check directory diff --new-file"
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diff --new-file -sr "$DIRTEST"/a "$DIRTEST"/b | cmp  "$FILES"/dir_new_file -
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t_CheckExitStatus $? 
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# Check diff --unidirectional-new-file. Swap the command line arguments
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# around to make this work 
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echo "Check directory diff --unidirectional-new-file"
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diff --unidirectional-new-file "$DIRTEST"/b "$DIRTEST"/a | cmp  "$FILES"/dir_unidirectional -
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t_CheckExitStatus $?
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# Check we can ignore patterns with diff in directory mode -x 
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echo "Check diff -x excludes file patterns"
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diff -x tz* "$DIRTEST"/a "$DIRTEST"/b | cmp  "$FILES"/dir_x -
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t_CheckExitStatus $?
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# Check we can ignore patterns read from a file with diff in directory mode 
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# -X --exclude-from=
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echo "Check diff -X excludes file patterns"
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diff -X "$FILES"/exclude "$DIRTEST"/a "$DIRTEST"/b | cmp  "$FILES"/dir_x -
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t_CheckExitStatus $?
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echo "Check diff --exclude-from excludes file patterns"
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diff --exclude-from="$FILES"/exclude "$DIRTEST"/a "$DIRTEST"/b | cmp  "$FILES"/dir_x -
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t_CheckExitStatus $?
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# Check we can exclude differences based on file name case
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# https://bugzilla.redhat.com/show_bug.cgi?id=719001
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# 
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mv "$DIRTEST"/a/lao "$DIRTEST"/a/LAO
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echo "Checking --ignore-file-name-case"
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echo "see https://bugzilla.redhat.com/show_bug.cgi?id=719001"
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echo "If this fails then the bug has been fixed"
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if [ "$centos_ver" = "7" ];then
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  echo SKIP
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else
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 diff --ignore-file-name-case "$DIRTEST"/a "$DIRTEST"/b | cmp "$FILES"/dir_case
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 t_CheckExitStatus $?
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fi
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# Check the --to-file option
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echo "Checking the --to-file option against a file"
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diff --to-file $FILES/lao $DIRTEST/a/LAO
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t_CheckExitStatus $?
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echo "Checking the --to-file option against a directory"
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diff --to-file $FILES/lao $DIRTEST/b
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t_CheckExitStatus $?
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rm -f "$F1"
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rm -f "$F2"
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rm -r "$DIRTEST"