Fix tests in rxjava-math

Author: zsxwing

rxjava-contrib/rxjava-math/src/test/java/rx/math/operators/OperationMinMaxTest.java

@@ -23,6 +23,7 @@
 import java.util.Arrays;
 import java.util.Comparator;
 import java.util.List;
+import java.util.NoSuchElementException;
 
 import org.junit.Test;
 import org.mockito.InOrder;
@@ -56,7 +57,7 @@ public void testMinWithEmpty() {
         observable.subscribe(observer);
         InOrder inOrder = inOrder(observer);
         inOrder.verify(observer, times(1)).onError(
-                isA(IllegalArgumentException.class));
+                isA(NoSuchElementException.class));
         inOrder.verifyNoMoreInteractions();
     }
 
@@ -96,7 +97,7 @@ public int compare(Integer o1, Integer o2) {
         observable.subscribe(observer);
         InOrder inOrder = inOrder(observer);
         inOrder.verify(observer, times(1)).onError(
-                isA(IllegalArgumentException.class));
+                isA(NoSuchElementException.class));
         inOrder.verifyNoMoreInteractions();
     }
 
@@ -216,7 +217,7 @@ public void testMaxWithEmpty() {
         observable.subscribe(observer);
         InOrder inOrder = inOrder(observer);
         inOrder.verify(observer, times(1)).onError(
-                isA(IllegalArgumentException.class));
+                isA(NoSuchElementException.class));
         inOrder.verifyNoMoreInteractions();
     }
 
@@ -256,7 +257,7 @@ public int compare(Integer o1, Integer o2) {
         observable.subscribe(observer);
         InOrder inOrder = inOrder(observer);
         inOrder.verify(observer, times(1)).onError(
-                isA(IllegalArgumentException.class));
+                isA(NoSuchElementException.class));
         inOrder.verifyNoMoreInteractions();
     }