from needs to less than to in float range

When testing float range, the from and to values
are generated then it is decided whether or not to
include the bounds within the range. If the values
are not included in the range, the min value is
calculated as the next higher float value than from
and to as the next lower float value. If from and to
are immediately adjacent to each other, and bounds
are not included, the lower end of the range will
be larger than the upper

Author: parkertimmins

server/src/test/java/org/elasticsearch/index/mapper/FloatRangeFieldMapperTests.java

@@ -42,10 +42,11 @@ protected boolean supportsDecimalCoerce() {
 
     @Override
     protected TestRange<Float> randomRangeForSyntheticSourceTest() {
-        var includeFrom = randomBoolean();
         Float from = (float) randomDoubleBetween(-Float.MAX_VALUE, Float.MAX_VALUE - Math.ulp(Float.MAX_VALUE), true);
-        var includeTo = randomBoolean();
         Float to = (float) randomDoubleBetween(from + Math.ulp(from), Float.MAX_VALUE, true);
+        boolean valuesAdjacent = Math.nextUp(from) > Math.nextDown(to);
+        var includeFrom = valuesAdjacent || randomBoolean();
+        var includeTo = valuesAdjacent || randomBoolean();
 
         if (rarely()) {
             from = null;