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