test fix

Author: slisaasquatch

src/test/java/com/saasquatch/jsonschemainferrer/JsonSchemaInferrerExamplesTest.java

@@ -258,7 +258,7 @@ private static Collection<JsonSchemaInferrer> getTestInferrers() {
                   EnumExtractors.validEnum(DayOfWeek.class), input -> {
                     final Set<? extends JsonNode> primitives = input.getSamples().stream()
                         .filter(JsonNode::isValueNode).collect(Collectors.toSet());
-                    if (primitives.size() <= 3) {
+                    if (primitives.size() <= 3 && primitives.size() > 0) {
                       return Collections.singleton(primitives);
                     }
                     return Collections.emptySet();

src/test/java/com/saasquatch/jsonschemainferrer/examples/Example2.java

@@ -47,7 +47,7 @@ public class Example2 {
             final Set<? extends JsonNode> primitives = input.getSamples().stream()
                 .filter(JsonNode::isValueNode)
                 .collect(Collectors.toSet());
-            if (primitives.size() <= 100) {
+            if (primitives.size() <= 100 && primitives.size() > 0) {
               return Collections.singleton(primitives);
             }
             return Collections.emptySet();