1 files changed, 4 insertions, 4 deletions

diff --git a/Tests/hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.tests/src/hu/bme/mit/inf/dslreasoner/viatrasolver/logic2viatra/tests/interval/SumTest.xtend b/Tests/hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.tests/src/hu/bme/mit/inf/dslreasoner/viatrasolver/logic2viatra/tests/interval/SumTest.xtend
index cbd7e71f..530c081c 100644
--- a/Tests/hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.tests/src/hu/bme/mit/inf/dslreasoner/viatrasolver/logic2viatra/tests/interval/SumTest.xtend
+++ b/Tests/hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.tests/src/hu/bme/mit/inf/dslreasoner/viatrasolver/logic2viatra/tests/interval/SumTest.xtend
@@ -24,7 +24,7 @@ class SumTest {
 
         @Test
         def void emptyTest() {
-                assertEquals(null)
+                assertEquals(ZERO)
         }
 
         @Test
@@ -37,7 +37,7 @@ class SumTest {
         def void addRemoveTest() {
                 add(between(-1, 1))
                 remove(between(-1, 1))
-                assertEquals(null)
+                assertEquals(ZERO)
         }
 
         @Test
@@ -79,7 +79,7 @@ class SumTest {
                 remove(between(-1, 1))
                 remove(between(-1, 1))
                 remove(between(-1, 1))
-                assertEquals(null)
+                assertEquals(ZERO)
         }
 
         @Test
@@ -108,7 +108,7 @@ class SumTest {
                         } else {
                                 current.remove(interval)
                         }
-                        val expected = current.stream.reduce(aggregator.mode).orElse(null)
+                        val expected = current.stream.reduce(aggregator.mode).orElse(ZERO)
                         update(interval, isInsert)
                         assertEquals(expected)
                 }