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

web/src/test/java/org/springframework/security/web/authentication/ui/DefaultResourcesFilterTests.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.authentication.ui;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.hamcrest.Matchers.containsString;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+/**
+ * @author Daniel Garnier-Moiroux
+ * @since 6.4
+ */
+public class DefaultResourcesFilterTests {
+
+	private final DefaultResourcesFilter filter = DefaultResourcesFilter.css();
+
+	private final MockMvc mockMvc = MockMvcBuilders.standaloneSetup(new Object()).addFilters(this.filter).build();
+
+	@Test
+	public void doFilterThenRender() throws Exception {
+		this.mockMvc.perform(get("/default-ui.css"))
+			.andExpect(status().isOk())
+			.andExpect(content().contentType("text/css;charset=UTF-8"))
+			.andExpect(content().string(containsString("body {")));
+	}
+
+	@Test
+	public void doFilterWhenPathDoesNotMatchThenCallsThrough() throws Exception {
+		this.mockMvc.perform(get("/does-not-match")).andExpect(status().isNotFound());
+	}
+
+	@Test
+	void toStringPrintsPathAndResource() {
+		assertThat(this.filter.toString()).isEqualTo(
+				"DefaultResourcesFilter [matcher=Ant [pattern='/default-ui.css', GET], resource=org/springframework/security/default-ui.css]");
+	}
+
+}