#!/bin/bash

# Author: Iain Douglas <centos@1n6.org.uk>

# Tests for cmp

function ExitFail {

    t_Log "FAIL"

    exit $FAIL

}

# Basic Tests

t_Log "Running $0 - cmp tests"

t_Log "Basic Check"

cmp -v &>/dev/null || ExitFail

FILE=/var/tmp/diffutils

# Cleanup just in case we exited without doing so earlier.

rm ${FILE}a ${FILE}b &>/dev/null

# Create some files to work with

cat << EOF >${FILE}a

This is some text to play with

EOF

cat << EOF >${FILE}b

This is some test to play with

EOF

# Basic check of 2 files

t_Log "Compare 2 files"

cmp ${FILE}a ${FILE}b | grep -q "byte 16, line 1" || ExitFail

t_Log "Compare 2 files -b"

cmp -b ${FILE}a ${FILE}b | grep -q " line 1 is 170 x 163 s" || ExitFail

t_Log "Check -i - skip bytes "

# Expect this to pass as the difference is at byte 16 

cmp -b -i 16 ${FILE}a ${FILE}b || ExitFail

t_Log "check -i skip1:skip2"

# Expect this to have a different output to earlier 

cmp -i 15:16 ${FILE}a ${FILE}b | grep -q "byte 1, line 1"|| ExitFail

# Chek that -n works 

t_Log "Check -n limit bytes"

cmp -n 15 ${FILE}a ${FILE}b || ExitFail

# Verbose output

t_Log "Check -l - verbose output"

cmp -l ${FILE}a ${FILE}b | grep -q "16 170 163" || ExitFail

# Silent - exit status only, first scheck that there is no output

t_Log "Check -s - silent mode"

cmp -s ${FILE}a ${FILE}b | wc -m | grep -q "^0" || ExitFail

cmp -i 16 -s ${FILE}a ${FILE}b 

t_CheckExitStatus $?

rm ${FILE}a ${FILE}b &>/dev/null