Add test for global Consumer<ExchangeResult> in WebTestClient

See gh-26662

spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/GlobalEntityResultConsumerTests.java

@@ -0,0 +1,98 @@
+/*
+ * Copyright 2002-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.test.web.reactive.server.samples;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+import java.util.List;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.http.MediaType;
+import org.springframework.test.web.reactive.server.WebTestClient;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests with a globally registered
+ * {@link org.springframework.test.web.reactive.server.EntityExchangeResult} consumer.
+ *
+ * @author Rossen Stoyanchev
+ */
+public class GlobalEntityResultConsumerTests {
+
+	private final StringBuilder output = new StringBuilder();
+
+	private final WebTestClient client = WebTestClient.bindToController(TestController.class)
+			.configureClient()
+			.entityExchangeResultConsumer(result -> {
+				byte[] bytes = result.getResponseBodyContent();
+				this.output.append(new String(bytes, StandardCharsets.UTF_8));
+			})
+			.build();
+
+
+	@Test
+	void json() {
+		this.client.get().uri("/person/1")
+				.accept(MediaType.APPLICATION_JSON)
+				.exchange()
+				.expectStatus().isOk()
+				.expectBody().json("{\"name\":\"Joe\"}");
+
+		assertThat(this.output.toString()).isEqualTo("{\"name\":\"Joe\"}");
+	}
+
+	@Test
+	void entity() {
+		this.client.get().uri("/person/1")
+				.accept(MediaType.APPLICATION_JSON)
+				.exchange()
+				.expectStatus().isOk()
+				.expectBody(Person.class).isEqualTo(new Person("Joe"));
+
+		assertThat(this.output.toString()).isEqualTo("{\"name\":\"Joe\"}");
+	}
+
+	@Test
+	void entityList() {
+		this.client.get().uri("/persons")
+				.accept(MediaType.APPLICATION_JSON)
+				.exchange()
+				.expectStatus().isOk()
+				.expectBodyList(Person.class).hasSize(2);
+
+		assertThat(this.output.toString())
+				.isEqualTo("[{\"name\":\"Joe\"},{\"name\":\"Joseph\"}]");
+	}
+
+
+	@RestController
+	static class TestController {
+
+		@GetMapping("/person/{id}")
+		Person getPerson() {
+			return new Person("Joe");
+		}
+
+		@GetMapping("/persons")
+		List<Person> getPersons() {
+			return Arrays.asList(new Person("Joe"), new Person("Joseph"));
+		}
+	}
+}