ClassNameConverterTest.java

package org.mutabilitydetector.locations;

/*
 * #%L
 * MutabilityDetector
 * %%
 * Copyright (C) 2008 - 2014 Graham Allan
 * %%
 * 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.
 * #L%
 */



import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;
import static org.junit.Assert.assertEquals;

import org.junit.Test;

public class ClassNameConverterTest {

    private static final ClassNameConverter CONVERTER = new ClassNameConverter();

    @Test
    public void canExtractTypeNameFromInternalDescriptorOfArrayReference() throws Exception {
        assertThat(CONVERTER.dotted("[B"), is("[B"));
        assertThat(CONVERTER.dotted("[[I"), is("[I"));
        assertThat(CONVERTER.dotted("[[[[[[J"), is("[J"));
        assertThat(CONVERTER.dotted("[Ljava/lang/Object;"), is("java.lang.Object"));
        assertThat(CONVERTER.dotted("[[Ljava/lang/Object;"), is("java.lang.Object"));
    }

    @Test
    public void dottedClassNamesRemainTheSame() throws Exception {
        String dotted = "some.dotted.ClassName";
        assertEquals(dotted, CONVERTER.dotted(dotted));
    }

    @Test
    public void slashedClassNameIsReturnedDotted() throws Exception {
        String slashed = "some/slashed/ClassName";
        assertEquals("some.slashed.ClassName", CONVERTER.dotted(slashed));
    }

    @Test
    public void dotClassSuffixIsRemoved() throws Exception {
        String dotClass = "some/slashed/ClassName.class";
        assertEquals("some.slashed.ClassName", CONVERTER.dotted(dotClass));
    }
    
    @Test
    public void doesNotReplaceTheWordClassIfItAppearsInMiddleOfWord() throws Exception {
        String containsWordClass = "some/slashed/packagewithwordclassinit/ClassName.class";
        assertEquals("some.slashed.packagewithwordclassinit.ClassName", CONVERTER.dotted(containsWordClass));
    }

    @Test
    public void doesNotReplaceTheWordClassIfItAppearsAtStartOfPackageName() throws Exception {
        String containsWordClass = "com/sun/org/apache/bcel/internal/classfile/AccessFlags.class";
        assertEquals("com.sun.org.apache.bcel.internal.classfile.AccessFlags", CONVERTER.dotted(containsWordClass));
    }
    
    @Test
    public void willStripAllArrayDescriptorsFromMultiDimensionalArrays() throws Exception {
        String multidimensionalPrimitiveArray = "[[[B";
        assertEquals("[B", CONVERTER.dotted(multidimensionalPrimitiveArray));
    }
    
    @Test
    public void convertsInternalReferenceType() throws Exception {
        assertEquals("java.util.List", CONVERTER.dotted("Ljava/util/List;"));
    }
    
}