Adds throws method to asserting

.gitignore

@@ -4,6 +4,7 @@
 .tscache/
 node_modules/
 tscommand*.txt
+.coverage_data/
 
 # Exclude from repo
 out/

package.json

@@ -1,6 +1,6 @@
 {
   "name": "oscar",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "devDependencies": {
     "grunt": "~0.4.5",
     "grunt-ts": "~1.12.1",

src/Assert.ts

@@ -78,6 +78,26 @@ class Assert {
 			throw new Error('Unexpected ' + unexpected + ' instead of ' + value);
 		}
 	}
+
+	/**
+	 * Asserts provided function to throw an error
+	 * @param {() => void} func [description]
+	 */
+	static throws(func : () => void) : void {
+		var hasFailed : boolean;
+
+		hasFailed = false;
+
+		try {
+			func();
+		} catch (e) {
+			hasFailed = true;
+		} finally {
+			if (!hasFailed) {
+				throw new Error('Expected function to throw an error');
+			}
+		}
+	}
 
 	//endregion Public Methods