platform/lang-impl/src/com/intellij/testIntegration/TestFinderHelper.java

/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * 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.intellij.testIntegration;

import com.intellij.openapi.extensions.Extensions;
import com.intellij.openapi.util.Comparing;
import com.intellij.openapi.util.Pair;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiNamedElement;
import com.intellij.psi.codeStyle.NameUtil;
import org.jetbrains.annotations.Nullable;

import java.util.*;

public class TestFinderHelper {
  public static PsiElement findSourceElement(PsiElement from) {
    for (TestFinder each : getFinders()) {
      PsiElement result = each.findSourceElement(from);
      if (result != null) return result;
    }
    return null;
  }

  public static List<PsiElement> findTestsForClass(PsiElement element) {
    List<PsiElement> result = new ArrayList<PsiElement>();
    for (TestFinder each : getFinders()) {
      result.addAll(each.findTestsForClass(element));
    }
    return result;
  }

  public static List<PsiElement> findClassesForTest(PsiElement element) {
    List<PsiElement> result = new ArrayList<PsiElement>();
    for (TestFinder each : getFinders()) {
      result.addAll(each.findClassesForTest(element));
    }
    return result;
  }

  public static boolean isTest(PsiElement element) {
    if (element == null) return false;
    for (TestFinder each : getFinders()) {
      if (each.isTest(element)) return true;
    }
    return false;
  }

  public static TestFinder[] getFinders() {
    return Extensions.getExtensions(TestFinder.EP_NAME);
  }

  public static Integer calcTestNameProximity(final String className, final String testName) {
    int posProximity = testName.indexOf(className);
    int sizeProximity = testName.length() - className.length();

    return posProximity + sizeProximity;
  }

  public static List<PsiElement> getSortedElements(final List<Pair<? extends PsiNamedElement, Integer>> elementsWithWeights,
                                                   final boolean weightsAscending) {
    return getSortedElements(elementsWithWeights, weightsAscending, null);
  }

  public static List<PsiElement> getSortedElements(final List<Pair<? extends PsiNamedElement, Integer>> elementsWithWeights,
                                                   final boolean weightsAscending,
                                                   @Nullable final Comparator<PsiElement> sameNameComparator) {
    Collections.sort(elementsWithWeights, new Comparator<Pair<? extends PsiNamedElement, Integer>>() {
      @Override
      public int compare(Pair<? extends PsiNamedElement, Integer> o1, Pair<? extends PsiNamedElement, Integer> o2) {
        int result = weightsAscending ? o1.second.compareTo(o2.second) : o2.second.compareTo(o1.second);
        if (result == 0) result = Comparing.compare(o1.first.getName(), o2.first.getName());
        if (result == 0 && sameNameComparator != null) result = sameNameComparator.compare(o1.first, o2.first);

        return result;
      }
    });

    final List<PsiElement> result = new ArrayList<PsiElement>(elementsWithWeights.size());
    for (Pair<? extends PsiNamedElement, Integer> each : elementsWithWeights) {
      result.add(each.first);
    }

    return result;
  }

  public static List<Pair<String, Integer>> collectPossibleClassNamesWithWeights(String testName) {
    String[] words = NameUtil.splitNameIntoWords(testName);
    List<Pair<String, Integer>> result = new ArrayList<Pair<String, Integer>>();

    for (int from = 0; from < words.length; from++) {
      for (int to = from; to < words.length; to++) {
        result.add(new Pair<String, Integer>(StringUtil.join(words, from, to + 1, ""),
                                             words.length - from + to));
      }
    }

    return result;
  }
}