ExtractMethodTestCase.java example

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/* 
 * Copyright (C) 2006, 2007  Dennis Hunziker, Ueli Kistler
 * Copyright (C) 2007  Reto Schuettel, Robin Stocker
 */

package org.python.pydev.refactoring.tests.coderefactoring.extractmethod;

import java.util.SortedMap;
import java.util.TreeMap;

import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.text.TextSelection;
import org.eclipse.text.edits.MalformedTreeException;
import org.eclipse.text.edits.MultiTextEdit;
import org.python.pydev.core.FileUtilsFileBuffer;
import org.python.pydev.core.IGrammarVersionProvider;
import org.python.pydev.core.MisconfigurationException;
import org.python.pydev.parser.jython.ast.Module;
import org.python.pydev.refactoring.ast.adapters.AbstractScopeNode;
import org.python.pydev.refactoring.ast.adapters.ModuleAdapter;
import org.python.pydev.refactoring.ast.visitors.VisitorFactory;
import org.python.pydev.refactoring.coderefactoring.extractmethod.edit.ExtractCallEdit;
import org.python.pydev.refactoring.coderefactoring.extractmethod.edit.ExtractMethodEdit;
import org.python.pydev.refactoring.coderefactoring.extractmethod.edit.ParameterReturnDeduce;
import org.python.pydev.refactoring.coderefactoring.extractmethod.request.ExtractMethodRequest;
import org.python.pydev.refactoring.core.base.RefactoringInfo;
import org.python.pydev.refactoring.tests.adapter.PythonNatureStub;
import org.python.pydev.refactoring.tests.core.AbstractIOTestCase;

import com.thoughtworks.xstream.XStream;

public class ExtractMethodTestCase extends AbstractIOTestCase {

    private static final int EXTENSION = 4;

    public ExtractMethodTestCase(String name) {
        super(name);
    }

    @Override
    public void runTest() throws Throwable {
        FileUtilsFileBuffer.IN_TESTS = true;
        MockupExtractMethodConfig config = initConfig();

        IDocument doc = new Document(data.source);
        Module astModule = VisitorFactory.getRootNode(doc, createVersionProvider());
        String name = data.file.getName();
        name = name.substring(0, name.length() - EXTENSION);
        ModuleAdapter module = new ModuleAdapter(null, data.file, doc, astModule, new PythonNatureStub());

        if (data.sourceSelection == null) {
            System.out.println("here");
        }
        ITextSelection selection = new TextSelection(doc, data.sourceSelection.getOffset(),
                data.sourceSelection.getLength());

        RefactoringInfo info = new RefactoringInfo(doc, selection, new IGrammarVersionProvider() {

            public int getGrammarVersion() throws MisconfigurationException {
                return IGrammarVersionProvider.GRAMMAR_PYTHON_VERSION_2_7;
            }
        });

        MockupExtractMethodRequestProcessor requestProcessor = setupRequestProcessor(config, module, info);

        IDocument refactoringDoc = applyExtractMethod(info, requestProcessor);

        this.setTestGenerated(refactoringDoc.get());
        assertContentsEqual(getExpected(), getGenerated());
        FileUtilsFileBuffer.IN_TESTS = false;
    }

    private IDocument applyExtractMethod(RefactoringInfo info, MockupExtractMethodRequestProcessor requestProcessor)
            throws BadLocationException, MalformedTreeException, MisconfigurationException {
        ExtractMethodRequest req = requestProcessor.getRefactoringRequests().get(0);

        ExtractMethodEdit extractedMethodEdit = new ExtractMethodEdit(req);
        ExtractCallEdit callExtractedMethodEdit = new ExtractCallEdit(req);

        MultiTextEdit edit = new MultiTextEdit();
        edit.addChild(extractedMethodEdit.getEdit());
        edit.addChild(callExtractedMethodEdit.getEdit());

        IDocument refactoringDoc = new Document(data.source);
        edit.apply(refactoringDoc);
        return refactoringDoc;
    }

    private MockupExtractMethodRequestProcessor setupRequestProcessor(MockupExtractMethodConfig config,
            ModuleAdapter module, RefactoringInfo info) {
        ModuleAdapter parsedSelection = info.getParsedExtendedSelection();

        AbstractScopeNode<?> scope = module.getScopeAdapter(info.getExtendedSelection());
        ParameterReturnDeduce deducer = new ParameterReturnDeduce(scope, info.getExtendedSelection(), module);

        SortedMap<String, String> renameMap = new TreeMap<String, String>();
        for (String variable : deducer.getParameters()) {
            String newName = variable;
            if (config.getRenameMap().containsKey(variable)) {
                newName = config.getRenameMap().get(variable);
            }
            renameMap.put(variable, newName);
        }

        return new MockupExtractMethodRequestProcessor(scope, info.getExtendedSelection(), parsedSelection, deducer,
                renameMap, config.getOffsetStrategy());
    }

    private MockupExtractMethodConfig initConfig() {
        MockupExtractMethodConfig config = null;
        XStream xstream = new XStream();
        xstream.alias("config", MockupExtractMethodConfig.class);

        if (data.config.length() > 0) {
            config = (MockupExtractMethodConfig) xstream.fromXML(data.getConfigContents());
        } else {
            config = new MockupExtractMethodConfig();
        }
        return config;
    }
}