handle null string

garbidge · garbidge · commit bd379d9751c9 · 2021-11-02T13:10:50.000+10:30
diff --git a/PreMailer.Net/PreMailer.Net/CssParser.cs b/PreMailer.Net/PreMailer.Net/CssParser.cs
@@ -128,6 +128,10 @@ private static string CleanupMediaQueries(string s)
 
 		public static IEnumerable<string> GetUnsupportedMediaQueries(string s)
 		{
+			if (string.IsNullOrWhiteSpace(s))
+			{
+				yield break;
+			}
 			foreach (Match match in MediaQueryRegex.Matches(s))
 			{
 				if (!SupportedMediaQueriesRegex.IsMatch(match.Value))

Original file line number	Diff line number	Diff line change
`@@ -128,6 +128,10 @@ private static string CleanupMediaQueries(string s)`
`128`	`128`
`129`	`129`	`public static IEnumerable<string> GetUnsupportedMediaQueries(string s)`
`130`	`130`	`{`
	`131`	`+ if (string.IsNullOrWhiteSpace(s))`
	`132`	`+ {`
	`133`	`+ yield break;`
	`134`	`+ }`
`131`	`135`	`foreach (Match match in MediaQueryRegex.Matches(s))`
`132`	`136`	`{`
`133`	`137`	`if (!SupportedMediaQueriesRegex.IsMatch(match.Value))`