Fix interrupt test: wait for exec to complete before continuing.

test/interrupt.test.js

@@ -13,7 +13,11 @@ describe('interrupt', function() {
             for (var i = 0; i < 8; i += 1) {
                 setup += 'insert into t values (' + i + ');';
             }
-            db.exec(setup);
+
+            db.exec(setup, function(err) {
+                if (err) {
+                    return done(err);
+                }
 
                 var query = 'select last.n ' +
                     'from t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t as last';
@@ -39,6 +43,7 @@ describe('interrupt', function() {
                 });
             });
         });
+    });
 
     it('should throw if interrupt is called before open', function(done) {
         var db = new sqlite3.Database(':memory:');