Check supported locales in AcceptHeaderLocaleResolver

Issue: SPR-13330

spring-webmvc/src/test/java/org/springframework/web/servlet/i18n/AcceptHeaderLocaleResolverTests.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2002-2016 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
+ *
+ *      http://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.servlet.i18n;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Locale;
+import javax.servlet.http.HttpServletRequest;
+
+import org.junit.Test;
+
+import org.springframework.mock.web.test.MockHttpServletRequest;
+
+import static java.util.Locale.CANADA;
+import static java.util.Locale.UK;
+import static java.util.Locale.US;
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Unit tests for {@link AcceptHeaderLocaleResolver}.
+ * @author Rossen Stoyanchev
+ */
+public class AcceptHeaderLocaleResolverTests {
+
+	private AcceptHeaderLocaleResolver resolver = new AcceptHeaderLocaleResolver();
+
+
+	@Test
+	public void resolve() throws Exception {
+		assertEquals(CANADA, this.resolver.resolveLocale(request(CANADA)));
+		assertEquals(US, this.resolver.resolveLocale(request(US, CANADA)));
+	}
+
+	@Test
+	public void resolvePreferredSupported() throws Exception {
+		this.resolver.setSupportedLocales(Collections.singletonList(CANADA));
+		assertEquals(CANADA, this.resolver.resolveLocale(request(US, CANADA)));
+	}
+
+	@Test
+	public void resolvePreferredNotSupported() throws Exception {
+		this.resolver.setSupportedLocales(Collections.singletonList(CANADA));
+		assertEquals(US, this.resolver.resolveLocale(request(US, UK)));
+	}
+
+
+	private HttpServletRequest request(Locale... locales) {
+		MockHttpServletRequest request = new MockHttpServletRequest();
+		request.setPreferredLocales(Arrays.asList(locales));
+		return request;
+	}
+
+}