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-rw-r--r--test/order_state_watcher_test.ts14
1 files changed, 14 insertions, 0 deletions
diff --git a/test/order_state_watcher_test.ts b/test/order_state_watcher_test.ts
index 5569d2354..913ccf602 100644
--- a/test/order_state_watcher_test.ts
+++ b/test/order_state_watcher_test.ts
@@ -84,6 +84,20 @@ describe('OrderStateWatcher', () => {
zeroEx.orderStateWatcher.removeOrder(nonExistentOrderHash);
});
});
+ describe('#subscribe', async () => {
+ afterEach(async () => {
+ zeroEx.orderStateWatcher.unsubscribe();
+ });
+ it('should fail when trying to subscribe twice', (done: DoneCallback) => {
+ zeroEx.orderStateWatcher.subscribe(_.noop);
+ try {
+ zeroEx.orderStateWatcher.subscribe(_.noop);
+ done(new Error('Expected the second subscription to fail'));
+ } catch (err) {
+ done();
+ }
+ });
+ });
describe('tests with cleanup', async () => {
afterEach(async () => {
zeroEx.orderStateWatcher.unsubscribe();