Add a test script and a functional test for the safari-borking bug re…

…ported by rharmes.

tests/README

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+To add a test:
+
+1. Create a "blah.css" or "blah.js" file.
+2. Create a "blah.css.min" or "blah.js.min" file, containing the expected minified output.
+
+That's all!

tests/media-test.css

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+@media screen and (-webkit-min-device-pixel-ratio:0) {
+  some-css : here
+}

tests/media-test.css.min

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+@media screen and (-webkit-min-device-pixel-ratio:0){some-css:here;}

tests/suite.sh

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+#!/usr/bin/env bash
+
+cd $(dirname $0)
+
+ls *.{css,js} | egrep -v '\.min$' | while read testfile; do
+
+	expected="$(
+		cat $( ls $testfile* | egrep '\.min$' )
+	)"
+	actual="$(
+		java -jar ../build/yuicompressor*.jar $testfile
+	)"
+
+	if [ "$expected" == "$actual" ]; then
+		echo "Passed: $testfile" > /dev/stderr
+	else
+		(
+			echo "Test failed: $testfile"
+			echo ""
+			echo "Expected:"
+			echo "$expected"
+			echo ""
+			echo "Actual:"
+			echo "$actual"
+		) > /dev/stderr
+		exit 1
+	fi
+done
+
+exit 0