| /* |
| * Copyright (C) 2008 The Guava 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 com.google.common.collect.testing.testers; |
| |
| import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES; |
| import static com.google.common.collect.testing.features.CollectionSize.ZERO; |
| import static com.google.common.collect.testing.features.ListFeature.SUPPORTS_SET; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import com.google.common.annotations.GwtIncompatible; |
| import com.google.common.collect.testing.Helpers; |
| import com.google.common.collect.testing.features.CollectionFeature; |
| import com.google.common.collect.testing.features.CollectionSize; |
| import com.google.common.collect.testing.features.ListFeature; |
| import java.lang.reflect.Method; |
| import org.junit.Ignore; |
| |
| /** |
| * A generic JUnit test which tests {@code set()} operations on a list. Can't be invoked directly; |
| * please see {@link com.google.common.collect.testing.ListTestSuiteBuilder}. |
| * |
| * @author George van den Driessche |
| */ |
| @GwtCompatible(emulated = true) |
| @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. |
| public class ListSetTester<E> extends AbstractListTester<E> { |
| @ListFeature.Require(SUPPORTS_SET) |
| @CollectionSize.Require(absent = ZERO) |
| public void testSet() { |
| doTestSet(e3()); |
| } |
| |
| @CollectionSize.Require(absent = ZERO) |
| @CollectionFeature.Require(ALLOWS_NULL_VALUES) |
| @ListFeature.Require(SUPPORTS_SET) |
| public void testSet_null() { |
| doTestSet(null); |
| } |
| |
| @CollectionSize.Require(absent = ZERO) |
| @CollectionFeature.Require(ALLOWS_NULL_VALUES) |
| @ListFeature.Require(SUPPORTS_SET) |
| public void testSet_replacingNull() { |
| E[] elements = createSamplesArray(); |
| int i = aValidIndex(); |
| elements[i] = null; |
| collection = getSubjectGenerator().create(elements); |
| |
| doTestSet(e3()); |
| } |
| |
| private void doTestSet(E newValue) { |
| int index = aValidIndex(); |
| E initialValue = getList().get(index); |
| assertEquals( |
| "set(i, x) should return the old element at position i.", |
| initialValue, |
| getList().set(index, newValue)); |
| assertEquals("After set(i, x), get(i) should return x", newValue, getList().get(index)); |
| assertEquals("set() should not change the size of a list.", getNumElements(), getList().size()); |
| } |
| |
| @ListFeature.Require(SUPPORTS_SET) |
| public void testSet_indexTooLow() { |
| try { |
| getList().set(-1, e3()); |
| fail("set(-1) should throw IndexOutOfBoundsException"); |
| } catch (IndexOutOfBoundsException expected) { |
| } |
| expectUnchanged(); |
| } |
| |
| @ListFeature.Require(SUPPORTS_SET) |
| public void testSet_indexTooHigh() { |
| int index = getNumElements(); |
| try { |
| getList().set(index, e3()); |
| fail("set(size) should throw IndexOutOfBoundsException"); |
| } catch (IndexOutOfBoundsException expected) { |
| } |
| expectUnchanged(); |
| } |
| |
| @CollectionSize.Require(absent = ZERO) |
| @ListFeature.Require(absent = SUPPORTS_SET) |
| public void testSet_unsupported() { |
| try { |
| getList().set(aValidIndex(), e3()); |
| fail("set() should throw UnsupportedOperationException"); |
| } catch (UnsupportedOperationException expected) { |
| } |
| expectUnchanged(); |
| } |
| |
| @CollectionSize.Require(ZERO) |
| @ListFeature.Require(absent = SUPPORTS_SET) |
| public void testSet_unsupportedByEmptyList() { |
| try { |
| getList().set(0, e3()); |
| fail("set() should throw UnsupportedOperationException or IndexOutOfBoundsException"); |
| } catch (UnsupportedOperationException | IndexOutOfBoundsException tolerated) { |
| } |
| expectUnchanged(); |
| } |
| |
| @CollectionSize.Require(absent = ZERO) |
| @ListFeature.Require(SUPPORTS_SET) |
| @CollectionFeature.Require(absent = ALLOWS_NULL_VALUES) |
| public void testSet_nullUnsupported() { |
| try { |
| getList().set(aValidIndex(), null); |
| fail("set(null) should throw NullPointerException"); |
| } catch (NullPointerException expected) { |
| } |
| expectUnchanged(); |
| } |
| |
| private int aValidIndex() { |
| return getList().size() / 2; |
| } |
| |
| /** |
| * Returns the {@link java.lang.reflect.Method} instance for {@link #testSet_null()} so that tests |
| * of {@link java.util.Collections#checkedCollection(java.util.Collection, Class)} can suppress it |
| * with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a |
| * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6409434">Sun bug 6409434</a> is fixed. |
| * It's unclear whether nulls were to be permitted or forbidden, but presumably the eventual fix |
| * will be to permit them, as it seems more likely that code would depend on that behavior than on |
| * the other. Thus, we say the bug is in set(), which fails to support null. |
| */ |
| @GwtIncompatible // reflection |
| public static Method getSetNullSupportedMethod() { |
| return Helpers.getMethod(ListSetTester.class, "testSet_null"); |
| } |
| } |