[enhancement] JSONSerializer recognizes new option exist:insert-final-newline

Author: line-o

exist-core/src/main/java/org/exist/util/serializer/json/JSONSerializer.java

@@ -70,6 +70,9 @@ public void serialize(Sequence sequence, Writer writer) throws SAXException {
                 generator.disable(JsonGenerator.Feature.STRICT_DUPLICATE_DETECTION);
             }
             serializeSequence(sequence, generator);
+            if ("yes".equals(outputProperties.getProperty(EXistOutputKeys.INSERT_FINAL_NEWLINE, "no"))) {
+                generator.writeRaw('\n');
+            }
             generator.close();
         } catch (IOException | XPathException e) {
             throw new SAXException(e.getMessage(), e);

exist-core/src/test/xquery/xquery3/serialize.xql

@@ -868,3 +868,29 @@ function ser:exist-insert-final-newline-true() {
         map {xs:QName("exist:insert-final-newline"): true()})
     return fn:ends-with($serialized, "
")
 };
+
+declare
+    %test:assertTrue
+function ser:exist-insert-final-newline-false-json() {
+    let $doc := map { "a": 1 }
+    let $serialized := fn:serialize($doc,
+        map {
+            "method": "json",
+            "exist:insert-final-newline": false()
+        }
+    )
+    return fn:ends-with($serialized, "}")
+};
+
+declare
+    %test:assertTrue
+function ser:exist-insert-final-newline-true-json() {
+    let $doc := map { "a": 1 }
+    let $serialized := fn:serialize($doc,
+        map {
+            "method": "json",
+            "exist:insert-final-newline": true()
+        }
+    )
+    return fn:ends-with($serialized, "
")
+};