interruption test

packages/fpdart/test/src/effect/effect_interruption_test.dart

@@ -0,0 +1,25 @@
+import "package:fpdart/fpdart.dart";
+import "package:test/test.dart";
+
+void main() {
+  group(
+    "Effect interruption",
+    () {
+      group('interrupt', () {
+        test('fail with Cause.Interrupted', () {
+          final main = Effect<Null, String, int>.succeed(10).interrupt().map(
+                (r) => r + 10,
+              );
+
+          final result = main.runSyncExit();
+          switch (result) {
+            case Right():
+              fail("Either expected to be Left: $result");
+            case Left(value: final value):
+              expect(value, isA<Interrupted>());
+          }
+        });
+      });
+    },
+  );
+}