Add test for number checker

dmnverifierapi/src/test/java/de/unikoblenz/fgbks/base/utils/boundary/checker/CheckInContactTest.java

@@ -28,6 +28,8 @@ class CheckInContactTest extends AbstractCheckerTest {
     doNumCheck("[1..3]", "=0", false);
     doNumCheck("[1..3]", "=4", false);
     doNumCheck("[1..3]", "<=4", true);
+    doNumCheck("", "]1..3[", true);
+    doNumCheck("", "=2", true);
   }
 
   @Override

dmnverifierapi/src/test/java/de/unikoblenz/fgbks/base/utils/boundary/checker/CheckNotInContactTest.java

@@ -28,6 +28,8 @@ class CheckNotInContactTest extends AbstractCheckerTest {
     doNumCheck("[1..3]", "=0", true);
     doNumCheck("[1..3]", "=4", true);
     doNumCheck("[1..3]", "<=4", false);
+    doNumCheck("", "]1..3[", false);
+    doNumCheck("", "=2", false);
   }
 
   @Override

dmnverifierapi/src/test/java/de/unikoblenz/fgbks/base/utils/boundary/checker/CheckOverlapTest.java

@@ -54,10 +54,12 @@ class CheckOverlapTest extends AbstractCheckerTest {
     doNumCheck("[1..3[", "[1..3[", false);
     doNumCheck("]1..3]", "]1..3]", false);
     doNumCheck("]1..3[", "]1..3[", false);
+    doNumCheck("]1..3[", "", false);
+    doNumCheck("=1", "", false);
   }
 
   @Override
   protected boolean checkBothWays() {
-    return false;
+    return true;
   }
 }

dmnverifierapi/src/test/java/de/unikoblenz/fgbks/base/utils/boundary/checker/CheckSubsumesTest.java

@@ -54,6 +54,10 @@ class CheckSubsumesTest extends AbstractCheckerTest {
     doNumCheck("[1..3[", "[1..3[", false);
     doNumCheck("]1..3]", "]1..3]", false);
     doNumCheck("]1..3[", "]1..3[", false);
+    doNumCheck("]1..3[", "", false);
+    doNumCheck("=1", "", false);
+    doNumCheck("", "]1..3[", true);
+    doNumCheck("", "=2", true);
   }
 
   @Override