Polish

See gh-26707

spring-web/src/main/java/org/springframework/web/context/support/ServletContextResource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2022 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.

spring-web/src/test/java/org/springframework/web/context/support/ServletContextResourceTests.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright 2002-2022 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.web.context.support;
+
+import java.io.IOException;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.core.io.Resource;
+import org.springframework.web.testfixture.servlet.MockServletContext;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.mock;
+
+/**
+ * Tests for {@link ServletContextResource}.
+ *
+ * @author Chris Beams
+ * @author Brian Clozel
+ */
+public class ServletContextResourceTests {
+
+	private static final String TEST_RESOURCE_PATH = "org/springframework/web/context/support/resource.txt";
+
+	private final MockServletContext servletContext = new MockServletContext();
+
+	@Test
+	void resourceShouldHaveExpectedProperties() throws IOException {
+		Resource resource = new ServletContextResource(this.servletContext, TEST_RESOURCE_PATH);
+
+		assertThat(resource.getFile()).isNotNull();
+		assertThat(resource.exists()).isTrue();
+		assertThat(resource.isFile()).isTrue();
+		assertThat(resource.getFilename()).isEqualTo("resource.txt");
+		assertThat(resource.getURL().getFile().endsWith("resource.txt")).isTrue();
+	}
+
+	@Test
+	void relativeResourcesShouldHaveExpectedProperties() throws IOException {
+		Resource resource = new ServletContextResource(this.servletContext, TEST_RESOURCE_PATH);
+		Resource relative1 = resource.createRelative("relative.txt");
+		assertThat(relative1.getFilename()).isEqualTo("relative.txt");
+		assertThat(relative1.getURL().getFile().endsWith("relative.txt")).isTrue();
+		assertThat(relative1.exists()).isTrue();
+
+		Resource relative2 = resource.createRelative("folder/other.txt");
+		assertThat(relative2.getFilename()).isEqualTo("other.txt");
+		assertThat(relative2.getURL().getFile().endsWith("other.txt")).isTrue();
+		assertThat(relative2.exists()).isTrue();
+	}
+
+	@Test
+	void resourceWithDotPathShouldBeEqual() {
+		Resource resource = new ServletContextResource(this.servletContext, TEST_RESOURCE_PATH);
+		assertThat(new ServletContextResource(servletContext, "org/springframework/web/context/../context/support/./resource.txt")).isEqualTo(resource);
+	}
+
+	@Test
+	void resourceWithRelativePathShouldBeEqual() throws IOException {
+		Resource resource = new ServletContextResource(this.servletContext, "dir/");
+		Resource relative = resource.createRelative("subdir");
+		assertThat(relative).isEqualTo(new ServletContextResource(this.servletContext, "dir/subdir"));
+	}
+
+	@Test
+	void missingResourceShouldHaveExpectedProperties() {
+		MockServletContext context = mock(MockServletContext.class);
+		given(context.getRealPath(eq("/org/springframework/web/context/support/missing.txt")))
+				.willReturn(this.servletContext.getRealPath("org/springframework/web/context/support/") + "missing.txt");
+		Resource missing = new ServletContextResource(context, "org/springframework/web/context/support/missing.txt");
+
+		assertThat(missing.exists()).isFalse();
+		assertThat(missing.isFile()).isFalse();
+	}
+}