JAVA-8363: Move etag code to spring-boot-mvc-3

spring-boot-modules/spring-boot-mvc-3/src/test/java/com/baeldung/etag/EtagIntegrationTest.java

@@ -0,0 +1,121 @@
+package com.baeldung.etag;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import io.restassured.RestAssured;
+import io.restassured.http.ContentType;
+import io.restassured.response.Response;
+import org.assertj.core.util.Preconditions;
+import org.junit.Ignore;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.apache.commons.lang3.RandomStringUtils.randomAlphabetic;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
+@ComponentScan(basePackageClasses = WebConfig.class)
+@EnableAutoConfiguration
+public class EtagIntegrationTest {
+
+	@LocalServerPort
+	private int port;
+
+	@Test
+	public void givenResourceExists_whenRetrievingResource_thenEtagIsAlsoReturned() {
+		// Given
+		final String uriOfResource = createAsUri();
+
+		// When
+		final Response findOneResponse = RestAssured.given().header("Accept", "application/json").get(uriOfResource);
+
+		// Then
+		assertNotNull(findOneResponse.getHeader(HttpHeaders.ETAG));
+	}
+
+	@Test
+	public void givenResourceWasRetrieved_whenRetrievingAgainWithEtag_thenNotModifiedReturned() {
+		// Given
+		final String uriOfResource = createAsUri();
+		final Response findOneResponse = RestAssured.given().header("Accept", "application/json").get(uriOfResource);
+		final String etagValue = findOneResponse.getHeader(HttpHeaders.ETAG);
+
+		// When
+		final Response secondFindOneResponse = RestAssured.given().header("Accept", "application/json")
+				.headers("If-None-Match", etagValue).get(uriOfResource);
+
+		// Then
+		assertTrue(secondFindOneResponse.getStatusCode() == 304);
+	}
+
+	@Test
+	public void givenResourceWasRetrievedThenModified_whenRetrievingAgainWithEtag_thenResourceIsReturned() {
+		// Given
+		final String uriOfResource = createAsUri();
+		final Response firstFindOneResponse = RestAssured.given().header("Accept", "application/json")
+				.get(uriOfResource);
+		final String etagValue = firstFindOneResponse.getHeader(HttpHeaders.ETAG);
+		final long createdId = firstFindOneResponse.jsonPath().getLong("id");
+
+		Foo updatedFoo = new Foo("updated value");
+		updatedFoo.setId(createdId);
+		Response updatedResponse = RestAssured.given().contentType(ContentType.JSON).body(updatedFoo)
+				.put(uriOfResource);
+		assertThat(updatedResponse.getStatusCode() == 200);
+
+		// When
+		final Response secondFindOneResponse = RestAssured.given().header("Accept", "application/json")
+				.headers("If-None-Match", etagValue).get(uriOfResource);
+
+		// Then
+		assertTrue(secondFindOneResponse.getStatusCode() == 200);
+	}
+
+	@Test
+	@Ignore("Not Yet Implemented By Spring - https://jira.springsource.org/browse/SPR-10164")
+	public void givenResourceExists_whenRetrievedWithIfMatchIncorrectEtag_then412IsReceived() {
+		// Given
+		final String uriOfResource = createAsUri();
+
+		// When
+		final Response findOneResponse = RestAssured.given().header("Accept", "application/json")
+				.headers("If-Match", randomAlphabetic(8)).get(uriOfResource);
+
+		// Then
+		assertTrue(findOneResponse.getStatusCode() == 412);
+	}
+
+	private final String createAsUri() {
+		final Response response = createAsResponse(new Foo(randomAlphabetic(6)));
+		Preconditions.checkState(response.getStatusCode() == 201, "create operation: " + response.getStatusCode());
+
+		return getURL() + "/" + response.getBody().as(Foo.class).getId();
+	}
+
+	private Response createAsResponse(final Foo resource) {
+		String resourceAsString;
+		try {
+			resourceAsString = new ObjectMapper().writeValueAsString(resource);
+		} catch (JsonProcessingException e) {
+			throw new AssertionError("Error during serialization");
+		}
+		return RestAssured.given().contentType(MediaType.APPLICATION_JSON.toString()).body(resourceAsString)
+				.post(getURL());
+	}
+
+	private String getURL() {
+		return "http://localhost:" + port + "/foos";
+	}
+
+}