mockit.coverage.lines.PerFileLineCoverage Maven / Gradle / Ivy

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JMockit Coverage is a code coverage tool with several metrics (line, path, data) capable of generating HTML reports. It is designed with ease of use in mind, avoiding the need for complex configuration. Instead, smart (but overridable) defaults are employed, such as the selection of which classes to consider for coverage, and where to find sources files for report generation.
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/*
 * Copyright (c) 2006-2015 Rogério Liesenfeld
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.coverage.lines;

import java.io.*;
import java.util.*;
import javax.annotation.*;

import mockit.coverage.*;
import mockit.coverage.data.*;

public final class PerFileLineCoverage implements PerFileCoverage
{
   private static final long serialVersionUID = 6318915843739466316L;
   private static final int[] NO_EXECUTIONS_YET = new int[0];

   @Nonnull private final Map lineToLineData = new HashMap(128);

   @SuppressWarnings("FieldAccessedSynchronizedAndUnsynchronized")
   @Nonnull private int[] executionCounts = NO_EXECUTIONS_YET;

   @Nonnull private transient LineCoverageData sharedLineData;

   // Computed on demand:
   private int lastLine;
   private transient int totalSegments;
   private transient int coveredSegments;

   public PerFileLineCoverage()
   {
      sharedLineData = new LineCoverageData();
      initializeCache();
   }

   private void initializeCache() { totalSegments = coveredSegments = -1; }

   private void readObject(@Nonnull ObjectInputStream in) throws IOException, ClassNotFoundException
   {
      sharedLineData = new LineCoverageData();
      initializeCache();
      in.defaultReadObject();

      if (executionCounts.length == 0) {
         executionCounts = NO_EXECUTIONS_YET;
      }
   }

   public void addLine(int line)
   {
      if (!lineToLineData.containsKey(line)) {
         lineToLineData.put(line, null);
      }

      if (line > lastLine) {
         // Happens for source files with multiple types, where one is only loaded
         // after another has already executed some code.
         int[] initialExecutionCounts = executionCounts;

         if (initialExecutionCounts != NO_EXECUTIONS_YET && line >= initialExecutionCounts.length) {
            int[] newCounts = new int[line + 30];
            System.arraycopy(initialExecutionCounts, 0, newCounts, 0, initialExecutionCounts.length);
            executionCounts = newCounts;
         }

         lastLine = line;
      }
   }

   @Nonnull
   public LineCoverageData getOrCreateLineData(int line)
   {
      LineCoverageData lineData = lineToLineData.get(line);

      if (lineData == null) {
         lineData = new LineCoverageData();
         lineToLineData.put(line, lineData);
      }

      return lineData;
   }

   @Nonnull
   public BranchCoverageData getBranchData(int line, int index)
   {
      LineCoverageData lineData = lineToLineData.get(line);
      return lineData.getBranchData(index);
   }

   public void markLastLineSegmentAsEmpty(int line)
   {
      LineCoverageData lineData = lineToLineData.get(line);
      lineData.markLastSegmentAsEmpty();
   }

   public boolean acceptsAdditionalCallPoints(int line)
   {
      LineCoverageData lineData = getOrCreateLineData(line);
      return lineData.acceptsAdditionalCallPoints();
   }

   public int registerExecution(int line, @Nullable CallPoint callPoint)
   {
      if (executionCounts == NO_EXECUTIONS_YET) {
         executionCounts = new int[lastLine + 1];
      }

      int previousExecutionCount = executionCounts[line]++;

      if (callPoint != null) {
         LineCoverageData lineData = getOrCreateLineData(line);
         lineData.registerExecution(callPoint);
      }

      return previousExecutionCount;
   }

   public boolean hasValidBranch(int line, int branchIndex)
   {
      LineCoverageData lineData = getOrCreateLineData(line);
      return lineData.isValidBranch(branchIndex);
   }

   public boolean acceptsAdditionalCallPoints(int line, int branchIndex)
   {
      LineCoverageData lineData = getOrCreateLineData(line);
      return lineData.acceptsAdditionalCallPoints(branchIndex);
   }

   public int registerExecution(int line, int branchIndex, @Nullable CallPoint callPoint)
   {
      LineCoverageData lineData = getOrCreateLineData(line);
      return lineData.registerExecution(branchIndex, callPoint);
   }

   public int getLineCount() { return lastLine; }
   public int getExecutableLineCount() { return lineToLineData.size(); }

   public boolean hasLineData(int line)
   {
      return executionCounts != NO_EXECUTIONS_YET && lineToLineData.containsKey(line);
   }

   @Nonnull
   public LineCoverageData getLineData(int line)
   {
      LineCoverageData data = lineToLineData.get(line);

      if (data == null) {
         data = sharedLineData;
      }

      data.setExecutionCount(executionCounts[line]);
      return data;
   }

   public int getExecutionCount(int line)
   {
      return line < executionCounts.length ? executionCounts[line] : -1;
   }

   @Override
   public int getTotalItems()
   {
      computeValuesIfNeeded();
      return totalSegments;
   }

   @Override
   public int getCoveredItems()
   {
      computeValuesIfNeeded();
      return coveredSegments;
   }

   @Override
   public int getCoveragePercentage()
   {
      computeValuesIfNeeded();
      return CoveragePercentage.calculate(coveredSegments, totalSegments);
   }

   private void computeValuesIfNeeded()
   {
      if (totalSegments >= 0) return;

      totalSegments = coveredSegments = 0;

      for (int line = 1, n = lastLine; line <= n; line++) {
         if (lineToLineData.containsKey(line)) {
            LineCoverageData lineData = lineToLineData.get(line);
            int executionCount = executionCounts == NO_EXECUTIONS_YET ? 0 : executionCounts[line];

            if (lineData == null) {
               totalSegments++;

               if (executionCount > 0) {
                  coveredSegments++;
               }
            }
            else {
               lineData.setExecutionCount(executionCount);
               totalSegments += lineData.getNumberOfSegments();
               coveredSegments += lineData.getNumberOfCoveredSegments();
            }
         }
      }
   }

   public int getNumberOfSegments(int line)
   {
      if (!lineToLineData.containsKey(line)) {
         return 0;
      }

      LineCoverageData lineData = lineToLineData.get(line);
      return lineData == null ? 1 : lineData.getNumberOfSegments();
   }

   public int getNumberOfBranchingSourcesAndTargets(int line)
   {
      LineCoverageData lineData = lineToLineData.get(line);

      if (lineData == null) {
         return 0;
      }

      return lineData.getNumberOfBranchingSourcesAndTargets();
   }

   public void reset()
   {
      for (int i = 1; i < executionCounts.length; i++) {
         executionCounts[i] = 0;
      }

      for (LineCoverageData lineData : lineToLineData.values()) {
         if (lineData != null) {
            lineData.reset();
         }
      }

      initializeCache();
   }

   public void mergeInformation(@Nonnull PerFileLineCoverage previousCoverage)
   {
      Map previousInfo = previousCoverage.lineToLineData;
      boolean previousRunHadLinesExecuted = previousCoverage.executionCounts.length > 0;

      for (Map.Entry lineAndInfo : lineToLineData.entrySet()) {
         Integer line = lineAndInfo.getKey();
         LineCoverageData previousLineInfo = previousInfo.get(line);

         if (previousLineInfo != null) {
            LineCoverageData lineInfo = lineAndInfo.getValue();

            if (lineInfo == null) {
               lineInfo = new LineCoverageData();
               lineAndInfo.setValue(lineInfo);
            }

            lineInfo.addCountsFromPreviousTestRun(previousLineInfo);

            if (previousRunHadLinesExecuted) {
               createExecutionCountsArrayIfNeeded(previousCoverage);
               executionCounts[line] += previousCoverage.executionCounts[line];
            }
         }
      }

      for (Map.Entry lineAndInfo : previousInfo.entrySet()) {
         Integer line = lineAndInfo.getKey();

         if (!lineToLineData.containsKey(line)) {
            LineCoverageData previousLineInfo = lineAndInfo.getValue();
            lineToLineData.put(line, previousLineInfo);

            if (previousRunHadLinesExecuted) {
               createExecutionCountsArrayIfNeeded(previousCoverage);
               executionCounts[line] = previousCoverage.executionCounts[line];
            }
         }
      }
   }

   private void createExecutionCountsArrayIfNeeded(@Nonnull PerFileLineCoverage previousCoverage)
   {
      if (executionCounts == NO_EXECUTIONS_YET) {
         executionCounts = new int[previousCoverage.executionCounts.length];
      }
   }
}