Fixed failed test

Author: Kamenev Yury

utbot-framework/src/test/kotlin/org/utbot/examples/stream/BaseStreamExampleTest.kt

@@ -162,6 +162,7 @@ class BaseStreamExampleTest : AbstractTestCaseGeneratorTest(
             BaseStreamExample::complexReduceExample,
             ignoreExecutionsNumber,
             { c, r -> c.isEmpty() && c.sumOf { it.toDouble() } + 42.0 == r },
+            { c, _ -> c.isNotEmpty() && null in c },
             { c, r -> c.isNotEmpty() && c.sumOf { it.toDouble() } + 42.0 == r },
             coverage = DoNotCalculate
         )

utbot-sample/src/main/java/org/utbot/examples/stream/BaseStreamExample.java

@@ -151,8 +151,16 @@ Optional<Integer> optionalReduceExample(List<Integer> list) {
      Double complexReduceExample(List<Integer> list) {
         UtMock.assume(list != null);
 
+        if (list.isEmpty()) {
+            return list.stream().reduce(42.0, (Double a, Integer b) -> a + b.doubleValue(), Double::sum);
+        }
+
+        if (list.contains(null)) {
+            return list.stream().reduce(42.0, (Double a, Integer b) -> a + b.doubleValue(), Double::sum);
+        }
+
         return list.stream().reduce(42.0, (Double a, Integer b) -> a + b.doubleValue(), Double::sum);
-    }
+     }
 
      Integer collectExample(List<Integer> list) {
         UtMock.assume(list != null);