BAEL-390: json processing with java ee 7

2017-01-16 18:53:40 -02:00
parent 142173dea1
commit efd384a3d0
4 changed files with 294 additions and 0 deletions
@@ -0,0 +1,135 @@
+package com.baeldug.json;
+
+import static org.hamcrest.CoreMatchers.hasItems;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
+
+import java.io.IOException;
+import java.io.StringReader;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Arrays;
+
+import javax.json.Json;
+import javax.json.JsonObject;
+import javax.json.JsonReader;
+import javax.json.stream.JsonParser;
+import javax.json.stream.JsonParser.Event;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import com.baeldung.json.Person;
+import com.baeldung.json.PersonBuilder;
+import com.baeldung.json.PersonWriter;
+
+public class JsonUnitTest {
+    private Person person;
+
+    private SimpleDateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy");
+    private String personJson; 
+    private String petshopJson; 
+    
+    @Test
+    public void whenPersonIsConvertedToString_thenAValidJsonStringIsReturned() throws IOException {
+        String generatedJsonString = new PersonWriter(person).write();
+        
+        assertEquals(
+                "Generated String has the expected format and content", 
+                personJson, 
+                generatedJsonString);
+    }
+    
+    @Test
+    public void whenJsonStringIsConvertedToPerson_thenAValidObjectIsReturned(
+            ) throws IOException, ParseException {        
+        Person person = new PersonBuilder(personJson).build();
+        
+        assertEquals("First name has expected value", "Michael", person.getFirstName());
+        assertEquals("Last name has expected value", "Scott", person.getLastName());
+        assertEquals(
+                "Birthdate has expected value", 
+                dateFormat.parse("06/15/1978"), 
+                person.getBirthdate());
+        assertThat(
+                "Email list has two items", 
+                person.getEmails(), 
+                hasItems("michael.scott@dd.com", "michael.scarn@gmail.com"));
+    }
+
+    @Test
+    public void whenUsingObjectModelToQueryForSpecificProperty_thenExpectedValueIsReturned(
+            ) throws IOException, ParseException {
+        JsonReader reader = Json.createReader(new StringReader(petshopJson));
+
+        JsonObject jsonObject = reader.readObject();
+        
+        assertEquals(
+                "The query should return the 'name' property of the third pet from the list", 
+                "Jake", 
+                jsonObject.getJsonArray("pets").getJsonObject(2).getString("name"));
+    }
+    
+    @Test
+    public void whenUsingStreamingApiToQueryForSpecificProperty_thenExpectedValueIsReturned(
+            ) throws IOException, ParseException {
+        JsonParser jsonParser = Json.createParser(new StringReader(petshopJson));
+        
+        int count = 0;
+        String result = null;
+        
+        while(jsonParser.hasNext()) {
+            Event e = jsonParser.next();
+            
+            if (e == Event.KEY_NAME) {
+                if(jsonParser.getString().equals("name")) {
+                   jsonParser.next();
+                   
+                   if(++count == 3) {
+                       result = jsonParser.getString();
+                       break;
+                   }
+                }   
+            }
+        }
+        
+        assertEquals(
+                "The query should return the 'name' property of the third pet from the list", 
+                "Jake", 
+                result);
+    }    
+    
+    @Before
+    public void init() throws ParseException {
+        // Creates a Person object
+        person = new Person();
+
+        person.setFirstName("Michael");
+        person.setLastName("Scott");
+        person.setBirthdate(dateFormat.parse("06/15/1978"));
+        person.setEmails(Arrays.asList("michael.scott@dd.com", "michael.scarn@gmail.com"));
+
+        // Initializes the Person Json
+        personJson = "\n" +
+                "{\n" +
+                "    \"firstName\":\"Michael\",\n" +
+                "    \"lastName\":\"Scott\",\n" +
+                "    \"birthdate\":\"06/15/1978\",\n" +
+                "    \"emails\":[\n" +
+                "        \"michael.scott@dd.com\",\n" +
+                "        \"michael.scarn@gmail.com\"\n" +
+                "    ]\n" +
+                "}";
+        
+        // Initializes the Pet Shop Json
+        petshopJson = "\n" +
+        "{\n" +
+        "    \"ownerId\":\"1\", \n" +
+        "    \"pets\":[ \n" +
+        "        {\"name\": \"Kitty\", \"type\": \"cat\"}, \n" +
+        "        {\"name\": \"Rex\", \"type\": \"dog\"}, \n" +
+        "        {\"name\": \"Jake\", \"type\": \"dog\"} \n" +
+        "    ]\n" +
+        "}";
+    }
+}