WebTestClient cookie assertion support

See gh-19647

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

@@ -0,0 +1,138 @@
+/*
+ * Copyright 2002-2020 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;
+
+import java.net.URI;
+import java.time.Duration;
+
+import org.junit.jupiter.api.Test;
+import reactor.core.publisher.MonoProcessor;
+import reactor.core.publisher.Sinks;
+
+import org.springframework.http.HttpMethod;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseCookie;
+import org.springframework.mock.http.client.reactive.MockClientHttpRequest;
+import org.springframework.mock.http.client.reactive.MockClientHttpResponse;
+
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+import static org.hamcrest.Matchers.equalTo;
+import static org.mockito.Mockito.mock;
+
+/**
+ * Unit tests for {@link CookieAssertions}
+ * @author Rossen Stoyanchev
+ */
+public class CookieAssertionTests {
+
+	private final ResponseCookie cookie = ResponseCookie.from("foo", "bar")
+			.maxAge(Duration.ofMinutes(30))
+			.domain("foo.com")
+			.path("/foo")
+			.secure(true)
+			.httpOnly(true)
+			.sameSite("Lax")
+			.build();
+
+	private final CookieAssertions assertions = cookieAssertions(cookie);
+
+
+	@Test
+	void valueEquals() {
+		assertions.valueEquals("foo", "bar");
+		assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertions.valueEquals("what?!", "bar"));
+		assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertions.valueEquals("foo", "what?!"));
+	}
+
+	@Test
+	void value() {
+		assertions.value("foo", equalTo("bar"));
+		assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertions.value("foo", equalTo("what?!")));
+	}
+
+	@Test
+	void exists() {
+		assertions.exists("foo");
+		assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertions.exists("what?!"));
+	}
+
+	@Test
+	void doesNotExist() {
+		assertions.doesNotExist("what?!");
+		assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertions.doesNotExist("foo"));
+	}
+
+	@Test
+	void maxAge() {
+		assertions.maxAge("foo", Duration.ofMinutes(30));
+		assertThatExceptionOfType(AssertionError.class)
+				.isThrownBy(() -> assertions.maxAge("foo", Duration.ofMinutes(29)));
+
+		assertions.maxAge("foo", equalTo(Duration.ofMinutes(30).getSeconds()));
+		assertThatExceptionOfType(AssertionError.class)
+				.isThrownBy(() -> assertions.maxAge("foo", equalTo(Duration.ofMinutes(29).getSeconds())));
+	}
+
+	@Test
+	void domain() {
+		assertions.domain("foo", "foo.com");
+		assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertions.domain("foo", "what.com"));
+
+		assertions.domain("foo", equalTo("foo.com"));
+		assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertions.domain("foo", equalTo("what.com")));
+	}
+
+	@Test
+	void path() {
+		assertions.path("foo", "/foo");
+		assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertions.path("foo", "/what"));
+
+		assertions.path("foo", equalTo("/foo"));
+		assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertions.path("foo", equalTo("/what")));
+	}
+
+	@Test
+	void secure() {
+		assertions.secure("foo", true);
+		assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertions.secure("foo", false));
+	}
+
+	@Test
+	void httpOnly() {
+		assertions.httpOnly("foo", true);
+		assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertions.httpOnly("foo", false));
+	}
+
+	@Test
+	void sameSite() {
+		assertions.sameSite("foo", "Lax");
+		assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertions.sameSite("foo", "Strict"));
+	}
+
+
+	private CookieAssertions cookieAssertions(ResponseCookie cookie) {
+		MockClientHttpRequest request = new MockClientHttpRequest(HttpMethod.GET, URI.create("/"));
+		MockClientHttpResponse response = new MockClientHttpResponse(HttpStatus.OK);
+		response.getCookies().add(cookie.getName(), cookie);
+
+		MonoProcessor<byte[]> emptyContent = MonoProcessor.fromSink(Sinks.one());
+		emptyContent.onComplete();
+
+		ExchangeResult result = new ExchangeResult(request, response, emptyContent, emptyContent, Duration.ZERO, null, null);
+		return new CookieAssertions(result, mock(WebTestClient.ResponseSpec.class));
+	}
+
+}