test to check library behavior

Author: arcuri82

pom.xml

@@ -49,6 +49,7 @@
 
     <properties>
         <java.version>1.8</java.version>
+        <snackjson.version>4.0.37</snackjson.version>
         <jackson.version>2.14.3</jackson.version>
         <junit.jupiter.version>5.14.3</junit.jupiter.version>
         <junit.platform.version>1.14.3</junit.platform.version>
@@ -88,7 +89,7 @@
         <dependency>
             <groupId>org.noear</groupId>
             <artifactId>snack4-jsonpath</artifactId>
-            <version>4.0.36</version>
+            <version>${snackjson.version}</version>
         </dependency>
 
         <!--

src/test/java/com/webfuzzing/overlayjvm/OverlayJVM_V1_1_0_custom_Test.java

@@ -1,11 +1,14 @@
 package com.webfuzzing.overlayjvm;
 
-import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
+import org.noear.snack4.ONode;
 
 import java.util.stream.Stream;
 
+import static org.junit.jupiter.api.Assertions.*;
+
 public class OverlayJVM_V1_1_0_custom_Test extends ProcessorTestBase {
 
     public static Stream<Data> overlayProvider() {
@@ -21,4 +24,83 @@ public static Stream<Data> overlayProvider() {
     public void testOverlay(ProcessorTestBase.Data data) throws Exception {
         verifyOverlay(data, "src/test/resources/custom");
     }
+
+    @Test
+    public void testLibrarySupport() throws Exception {
+
+        String json = readResource("custom/array/array.json");
+        assertNotNull(json);
+
+        ONode schema = ONode.ofJson(json);
+
+        //----------------------------------------------------
+        //this should return no results
+        String q0 = "$.a[?@.y]";
+        boolean e0 = schema.exists(q0);
+        ONode r0 = schema.select(q0);
+
+        //assertFalse(e0); //this fails
+        assertTrue(r0.isArray());
+        assertEquals(0, r0.size());
+        assertNull(r0.parent());
+
+        //----------------------------------------------------
+        //this should return the empty array in b
+        String q1 = "$.b";
+        boolean e1 = schema.exists(q1);
+        ONode r1 = schema.select(q1);
+
+        assertTrue(e1);
+        assertTrue(r1.isArray());
+        assertEquals(0, r1.size());
+        //is checking the parent the only way to see if the target is an array?
+        assertNotNull(r1.parent());
+
+        //----------------------------------------------------
+        //should get the elements in c and d
+        String q2 = "$.*.y";
+        boolean e2 = schema.exists(q2);
+        ONode r2 = schema.select(q2);
+
+        assertTrue(e2);
+        assertTrue(r2.isArray());
+        assertEquals(2, r2.size());
+        assertNull(r2.parent());
+        // the returned nodes in the result arrays are not copies, but references to original tree, sharing same root
+        assertEquals(r2.get(0).parent().parent(), r2.get(1).parent().parent());
+
+        //----------------------------------------------------
+        // although e is null, it exists
+        String q3 = "$.e";
+        boolean e3 = schema.exists(q3);
+        ONode r3 = schema.select(q3);
+
+        assertTrue(e3);
+        assertFalse(r3.isArray());
+        assertTrue(r3.isNull());
+        assertNotNull(r3.parent());
+
+        //----------------------------------------------------
+        // f is undefined in the document
+        String q4 = "$.f";
+        boolean e4 = schema.exists(q4);
+        ONode r4 = schema.select(q4);
+
+        //if undefined, then it is treated as a "null" node, but with no parent, and with "exists" returning false
+        assertFalse(e4);
+        assertFalse(r4.isArray());
+        assertTrue(r4.isNull());
+        assertNull(r4.parent());
+
+        //----------------------------------------------------
+        // f is undefined
+        String q5 = "$.f[?@.y]";
+        boolean e5 = schema.exists(q5);
+        ONode r5 = schema.select(q5);
+
+        //assertFalse(e5); // this fails???
+        assertTrue(r5.isArray()); //this is now treated as an empty array?
+        assertEquals(0, r5.size());
+        assertNull(r5.parent());
+    }
 }

src/test/java/com/webfuzzing/overlayjvm/ProcessorTestBase.java

@@ -3,13 +3,20 @@
 import org.skyscreamer.jsonassert.JSONAssert;
 import org.skyscreamer.jsonassert.JSONCompareMode;
 
+import java.io.IOException;
 import java.nio.file.Files;
+import java.nio.file.Path;
 import java.nio.file.Paths;
 
 import static org.junit.jupiter.api.Assertions.*;
 
 public class ProcessorTestBase {
 
+    protected String readResource(String resource) throws Exception {
+        Path path = Paths.get(this.getClass().getClassLoader().getResource(resource).toURI());
+        return new String(Files.readAllBytes(path));
+    }
+
     protected void verifyOverlay(Data data, String base) throws Exception {
 
         String openApi = new String(Files.readAllBytes(Paths.get(base, data.openApi)));

src/test/resources/custom/array/array.json

@@ -0,0 +1,7 @@
+{
+  "a": [{"x":  42}, {"x": 777}],
+  "b": [],
+  "c": {"y":  1},
+  "d": {"y":  2},
+  "e": null
+}