fixed issue #628

json-path/src/test/java/com/jayway/jsonpath/ConfigurationTest.java

@@ -0,0 +1,43 @@
+package com.jayway.jsonpath;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertNull;
+
+/**
+ * refer to issue #628
+ * example of how to use user configuration correctly
+ * use config.jsonProvider() to parse document will not have a result that related to this configuration.
+ */
+public class ConfigurationTest {
+
+    /**
+     * Nonexistant property returns null when configured.
+     */
+    @Test
+    public void nonexistant_property_returns_null_when_configured() {
+        String document = "{}";
+        Configuration config = Configuration.builder().options(Option.SUPPRESS_EXCEPTIONS).build();
+        String nonExistentPath = "$.doesNotExist";
+
+        assertNull(JsonPath.parse(document, config).read(nonExistentPath));
+        assertNull(JsonPath.using(config).parse(document).read(nonExistentPath));
+        //This way can not pass config to JsonPath.read
+        //assertNull(JsonPath.read(config.jsonProvider().parse(document), nonExistentPath));
+    }
+
+    /**
+     * Nonexistant property returns null when configured in real path.
+     */
+    @Test
+    public void nonexistant_property_returns_null_when_configured_in_real_path() {
+        String document = "{\"x\": [0,1,[0,1,2,3,null],null]}";
+        Configuration config = Configuration.builder().options(Option.SUPPRESS_EXCEPTIONS).build();
+        String nonExistentPath = "$.doesNotExist";
+
+        assertNull(JsonPath.parse(document, config).read(nonExistentPath));
+        assertNull(JsonPath.using(config).parse(document).read(nonExistentPath));
+        //This way can not pass config to JsonPath.read
+        //assertNull(JsonPath.read(config.jsonProvider().parse(document), nonExistentPath));
+    }
+}