#435 Fix zero with scale to boolean (3.1.x) (#438)

* Fixes number to boolean conversion

Author: stevenylai

src/main/java/com/ezylang/evalex/data/EvaluationValue.java

@@ -374,7 +374,7 @@ public String getStringValue() {
   public Boolean getBooleanValue() {
     switch (getDataType()) {
       case NUMBER:
-        return !value.equals(BigDecimal.ZERO);
+        return getNumberValue().compareTo(BigDecimal.ZERO) != 0;
       case BOOLEAN:
         return (Boolean) value;
       case STRING:

src/test/java/com/ezylang/evalex/data/conversion/BooleanConverterTest.java

@@ -56,4 +56,11 @@ void testCanNotConvert() {
     assertThat(converter.canConvert("true")).isFalse();
     assertThat(converter.canConvert(new BigDecimal(1))).isFalse();
   }
+
+  @Test
+  void testNumberToBoolean() {
+    EvaluationValue value = EvaluationValue.numberValue(new BigDecimal("0.0"));
+
+    assertThat(value.getBooleanValue()).isFalse();
+  }
 }

src/test/java/com/ezylang/evalex/operators/booleans/InfixAndOperatorTest.java

@@ -30,6 +30,7 @@ class InfixAndOperatorTest extends BaseEvaluationTest {
         "1&&1 : true",
         "1&&2 : true",
         "0&&1 : false",
+        "0.0&&1 : false",
         "22&&33 : true",
         "\"true\"&&\"true\" : true",
         "\"true\"&&\"false\" : false",

src/test/java/com/ezylang/evalex/operators/booleans/InfixOrOperatorTest.java

@@ -30,7 +30,9 @@ class InfixOrOperatorTest extends BaseEvaluationTest {
         "1||1 : true",
         "1||2 : true",
         "0||1 : true",
+        "0.0||1.0 : true",
         "0||0 : false",
+        "0.0||0.0 : false",
         "22||33 : true",
         "\"true\"||\"true\" : true",
         "\"true\"||\"false\" : true",