#!/usr/bin/env bash
#
# Copyright IBM Corp. 2017
#
# Usage: genhtml_test <ref-file> <file1> [<file2>...]
#
# Compare genhtml output of a reference coverage data file with that of
# a combination of multiple files.
#

function die()
{
	echo "Error: $@" >&2
	exit 1
}

GENHTMLFLAGS="-t title"
REFFILE=$1
shift

if [ -z "$REFFILE" -o -z "$*" ] ; then
	echo "Usage: $0 <ref-file> <file1> [<file2>...]" >&2
	exit 2
fi

OUTREF="out_$(basename $REFFILE .info)"
OUTCOMBINED="out_combined"

$GENHTML $GENHTMLFLAGS "$REFFILE" -o "$OUTREF" || \
	die "Could not generate HTML for reference file"

$GENHTML $GENHTMLFLAGS "$@" -o "$OUTCOMBINED" || \
	die "Could not generate HTML for combined files"

diff -ur "$OUTREF" "$OUTCOMBINED" -I "headerValue" || \
	die "Mismatch in generated output"
