Increase coverage

Signed-off-by: Antoni Reus <antoni.reus@exasol.com>

kernel/kernel-api/src/test/scala/io/delta/kernel/deletionvectors/RoaringBitmapArraySuite.scala

@@ -21,18 +21,48 @@ import org.scalatest.funsuite.AnyFunSuite
 
 class RoaringBitmapArraySuite extends AnyFunSuite {
 
-  test("RoaringBitmapArray create and contains methods") {
-    val bitmap = RoaringBitmapArray.create(1L, 100L, 10000000000L)
+
+  test("RoaringBitmapArray create empty map") {
+    val bitmap = RoaringBitmapArray.create()
+    assert(bitmap.toArray.isEmpty)
+  }
+
+  test("RoaringBitmapArray create map with values only in first bitmap") {
+    // Values <= max unsigned integer (4,294,967,295) will be in the first bitmap
+    val bitmap = RoaringBitmapArray.create(1L, 100L)
 
     assert(bitmap.contains(1L))
     assert(bitmap.contains(100L))
-    assert(bitmap.contains(10000000000L))
 
     assert(!bitmap.contains(2L))
     assert(!bitmap.contains(99L))
-    assert(!bitmap.contains(10000000001L))
 
-    assert(bitmap.toArray.sorted sameElements Array(1L, 100L, 10000000000L))
+    assert(bitmap.toArray sameElements Array(1L, 100L))
+  }
+
+  test("RoaringBitmapArray create map with values only in second bitmap") {
+    // Values > max unsigned integer (4,294,967,295) will be in the second bitmap
+    val bitmap = RoaringBitmapArray.create(5000000000L, 5000000100L)
+
+    assert(bitmap.contains(5000000000L))
+    assert(bitmap.contains(5000000100L))
+
+    assert(!bitmap.contains(5000000001L))
+    assert(!bitmap.contains(5000000099L))
+
+    assert(bitmap.toArray sameElements Array(5000000000L, 5000000100L))
+  }
+
+  test("RoaringBitmapArray create map with values in first and second bitmap") {
+    val bitmap = RoaringBitmapArray.create(100L, 5000000000L)
+
+    assert(bitmap.contains(100L))
+    assert(bitmap.contains(5000000000L))
+
+    assert(!bitmap.contains(101L))
+    assert(!bitmap.contains(5000000001L))
+
+    assert(bitmap.toArray sameElements Array(100L, 5000000000L))
   }
 
   // TODO need to implement serialize to copy over tests