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diff --git a/jimfs/src/test/java/com/google/common/jimfs/AbstractAttributeProviderTest.java b/jimfs/src/test/java/com/google/common/jimfs/AbstractAttributeProviderTest.java
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+/*
+ * Copyright 2013 Google Inc.
+ *
+ * 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 com.google.common.jimfs;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assert.fail;
+
+import com.google.common.collect.ImmutableMap;
+import java.io.IOException;
+import java.nio.file.attribute.FileAttributeView;
+import java.util.Map;
+import java.util.Set;
+import org.junit.Before;
+
+/**
+ * Abstract base class for tests of individual {@link AttributeProvider} implementations.
+ *
+ * @author Colin Decker
+ */
+public abstract class AbstractAttributeProviderTest<P extends AttributeProvider> {
+
+ protected static final ImmutableMap<String, FileAttributeView> NO_INHERITED_VIEWS =
+ ImmutableMap.of();
+
+ protected P provider;
+ protected File file;
+
+ /** Create the provider being tested. */
+ protected abstract P createProvider();
+
+ /** Creates the set of providers the provider being tested depends on. */
+ protected abstract Set<? extends AttributeProvider> createInheritedProviders();
+
+ protected FileLookup fileLookup() {
+ return new FileLookup() {
+ @Override
+ public File lookup() throws IOException {
+ return file;
+ }
+ };
+ }
+
+ @Before
+ public void setUp() {
+ this.provider = createProvider();
+ this.file = Directory.create(0);
+
+ Map<String, ?> defaultValues = createDefaultValues();
+ setDefaultValues(file, provider, defaultValues);
+
+ Set<? extends AttributeProvider> inheritedProviders = createInheritedProviders();
+ for (AttributeProvider inherited : inheritedProviders) {
+ setDefaultValues(file, inherited, defaultValues);
+ }
+ }
+
+ private static void setDefaultValues(
+ File file, AttributeProvider provider, Map<String, ?> defaultValues) {
+ Map<String, ?> defaults = provider.defaultValues(defaultValues);
+ for (Map.Entry<String, ?> entry : defaults.entrySet()) {
+ int separatorIndex = entry.getKey().indexOf(':');
+ String view = entry.getKey().substring(0, separatorIndex);
+ String attr = entry.getKey().substring(separatorIndex + 1);
+ file.setAttribute(view, attr, entry.getValue());
+ }
+ }
+
+ protected Map<String, ?> createDefaultValues() {
+ return ImmutableMap.of();
+ }
+
+ // assertions
+
+ protected void assertSupportsAll(String... attributes) {
+ for (String attribute : attributes) {
+ assertThat(provider.supports(attribute)).isTrue();
+ }
+ }
+
+ protected void assertContainsAll(File file, ImmutableMap<String, Object> expectedAttributes) {
+ for (Map.Entry<String, Object> entry : expectedAttributes.entrySet()) {
+ String attribute = entry.getKey();
+ Object value = entry.getValue();
+
+ assertThat(provider.get(file, attribute)).isEqualTo(value);
+ }
+ }
+
+ protected void assertSetAndGetSucceeds(String attribute, Object value) {
+ assertSetAndGetSucceeds(attribute, value, false);
+ }
+
+ protected void assertSetAndGetSucceeds(String attribute, Object value, boolean create) {
+ provider.set(file, provider.name(), attribute, value, create);
+ assertThat(provider.get(file, attribute)).isEqualTo(value);
+ }
+
+ protected void assertSetAndGetSucceedsOnCreate(String attribute, Object value) {
+ assertSetAndGetSucceeds(attribute, value, true);
+ }
+
+ @SuppressWarnings("EmptyCatchBlock")
+ protected void assertSetFails(String attribute, Object value) {
+ try {
+ provider.set(file, provider.name(), attribute, value, false);
+ fail();
+ } catch (IllegalArgumentException expected) {
+ }
+ }
+
+ @SuppressWarnings("EmptyCatchBlock")
+ protected void assertSetFailsOnCreate(String attribute, Object value) {
+ try {
+ provider.set(file, provider.name(), attribute, value, true);
+ fail();
+ } catch (UnsupportedOperationException expected) {
+ }
+ }
+}