1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/java/org/zwobble/couscous/tests/util/ExtraAsserts.java b/src/test/java/org/zwobble/couscous/tests/util/ExtraAsserts.java
new file mode 100644
index 0000000..8b1c16c
--- /dev/null
+++ b/src/test/java/org/zwobble/couscous/tests/util/ExtraAsserts.java
@@ -0,0 +1,21 @@
+package org.zwobble.couscous.tests.util;
+
+public class ExtraAsserts {
+    public interface Action {
+        void run();
+    }
+    
+    @SuppressWarnings("unchecked")
+    public static <T extends Throwable> T assertThrows(Class<T> exceptionType, Action action) {
+        try {
+            action.run();
+            throw new AssertionError("Expected exception");
+        } catch (Exception exception) {
+            if (exceptionType.isInstance(exception)) {
+                return (T)exception;
+            } else {
+                throw exception;
+            }
+        }
+    }
+}