Serve static content (css, js) for reactive default UIs from DefaultResourcesWebFilter

web/src/test/java/org/springframework/security/web/server/ui/DefaultResourcesWebFilterTests.java

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+/*
+ * Copyright 2002-2024 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.security.web.server.ui;
+
+import java.nio.charset.StandardCharsets;
+import java.util.List;
+
+import org.junit.jupiter.api.Test;
+import reactor.core.publisher.Mono;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.mock.http.server.reactive.MockServerHttpRequest;
+import org.springframework.mock.web.server.MockServerWebExchange;
+import org.springframework.web.server.WebFilterChain;
+import org.springframework.web.server.WebHandler;
+import org.springframework.web.server.handler.DefaultWebFilterChain;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Daniel Garnier-Moiroux
+ * @since 6.4
+ */
+class DefaultResourcesWebFilterTests {
+
+	private final WebHandler notFoundHandler = (exchange) -> {
+		exchange.getResponse().setStatusCode(HttpStatus.NOT_FOUND);
+		return Mono.empty();
+	};
+
+	private final DefaultResourcesWebFilter filter = DefaultResourcesWebFilter.css();
+
+	@Test
+	void filterWhenPathMatchesThenRenders() {
+		MockServerWebExchange exchange = MockServerWebExchange.from(MockServerHttpRequest.get("/default-ui.css"));
+		WebFilterChain filterChain = new DefaultWebFilterChain(this.notFoundHandler, List.of(this.filter));
+
+		filterChain.filter(exchange).block();
+
+		assertThat(exchange.getResponse().getStatusCode()).isEqualTo(HttpStatus.OK);
+		assertThat(exchange.getResponse().getHeaders().getContentType())
+			.isEqualTo(new MediaType("text", "css", StandardCharsets.UTF_8));
+		assertThat(exchange.getResponse().getBodyAsString().block()).contains("body {");
+	}
+
+	@Test
+	void filterWhenPathDoesNotMatchThenCallsThrough() {
+		MockServerWebExchange exchange = MockServerWebExchange.from(MockServerHttpRequest.get("/does-not-match"));
+		WebFilterChain filterChain = new DefaultWebFilterChain(this.notFoundHandler, List.of(this.filter));
+
+		filterChain.filter(exchange).block();
+
+		assertThat(exchange.getResponse().getStatusCode()).isEqualTo(HttpStatus.NOT_FOUND);
+	}
+
+	@Test
+	void toStringPrintsPathAndResource() {
+		assertThat(this.filter.toString()).isEqualTo(
+				"DefaultResourcesWebFilter{matcher=PathMatcherServerWebExchangeMatcher{pattern='/default-ui.css', method=GET}, resource='org/springframework/security/default-ui.css'}");
+	}
+
+}