Add a test to verify the issue that zip unnecessarily calls selector

akanehara · Dec 13, 2017 · 8da1567 · 8da1567
1 parent 6c24d74
commit 8da1567
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/test/GinqTest.php b/test/GinqTest.php
@@ -1598,6 +1598,10 @@ function($v0, $v1, $k0, $k1) { return "$v1 - $v0"; }
             array(6, "7 - red"),
             array(7, "8 - green")
         ), $xs);
+
+        // should't call selector if empty.
+        $actual = Ginq::zero()->zip(Ginq::zero(), function ($v0, $v1) { $this->assertTrue(false); })->count();
+        $this->assertEquals(0, $actual);
     }
 
     /**