/testability-explorer/src/test/java/com/google/test/metric/report/XMLReportDifferTest.java

  1package com.google.test.metric.report;
  2
  3import java.io.IOException;
  4import java.io.StringReader;
  5
  6import javax.xml.parsers.DocumentBuilder;
  7import javax.xml.parsers.DocumentBuilderFactory;
  8import javax.xml.parsers.ParserConfigurationException;
  9
 10import junit.framework.TestCase;
 11
 12import org.w3c.dom.Document;
 13import org.xml.sax.InputSource;
 14import org.xml.sax.SAXException;
 15
 16/**
 17 * Tests for {@link com.google.test.metric.report.XMLReportDiffer}.
 18 *
 19 * @author alexeagle@google.com (Alex Eagle)
 20 */
 21public class XMLReportDifferTest extends TestCase {
 22
 23  public void testDiffSameClass() throws Exception {
 24    XMLReportDiffer differ = new XMLReportDiffer();
 25    Document oldDoc = makeTestDoc("<a></a>");
 26    Document newDoc = makeTestDoc("<a></a>");
 27    Diff diff = differ.diff(oldDoc, newDoc);
 28    assertTrue(diff.getClassDiffs().isEmpty());
 29  }
 30
 31  public void testRemovedClass() throws Exception {
 32    XMLReportDiffer differ = new XMLReportDiffer();
 33    Document oldDoc = makeTestDoc("<class class='Foo' cost='12'></class>");
 34    Document newDoc = makeTestDoc("<a></a>");
 35    Diff diff = differ.diff(oldDoc, newDoc);
 36    assertEquals(1, diff.getClassDiffs().size());
 37    Diff.ClassDiff diff1 = diff.getClassDiffs().get(0);
 38    assertEquals("Foo", diff1.getClassName());
 39    assertEquals(12, diff1.getOldMetric().intValue());
 40    assertEquals(null, diff1.getNewMetric());
 41  }
 42
 43  public void testAddedClass() throws Exception {
 44    XMLReportDiffer differ = new XMLReportDiffer();
 45    Document oldDoc = makeTestDoc("<a></a>");
 46    Document newDoc = makeTestDoc("<class class='Foo' cost='12'></class>");
 47    Diff diff = differ.diff(oldDoc, newDoc);
 48    assertEquals(1, diff.getClassDiffs().size());
 49    Diff.ClassDiff diff1 = diff.getClassDiffs().get(0);
 50    assertEquals("Foo", diff1.getClassName());
 51    assertEquals(null, diff1.getOldMetric());
 52    assertEquals(12, diff1.getNewMetric().intValue());
 53  }
 54
 55  public void testChangedClass() throws Exception {
 56    XMLReportDiffer differ = new XMLReportDiffer();
 57    Document oldDoc = makeTestDoc("<class class='Foo' cost='21'></class>");
 58    Document newDoc = makeTestDoc("<class class='Foo' cost='12'></class>");
 59    Diff diff = differ.diff(oldDoc, newDoc);
 60    assertEquals(1, diff.getClassDiffs().size());
 61    Diff.ClassDiff diff1 = diff.getClassDiffs().get(0);
 62    assertEquals("Foo", diff1.getClassName());
 63    assertEquals(21, diff1.getOldMetric().intValue());
 64    assertEquals(12, diff1.getNewMetric().intValue());
 65  }
 66
 67  public void testUnchangedClass() throws Exception {
 68    XMLReportDiffer differ = new XMLReportDiffer();
 69    Document oldDoc = makeTestDoc("<class class='Foo' cost='12'></class>");
 70    Document newDoc = makeTestDoc("<class class='Foo' cost='12'></class>");
 71    Diff diff = differ.diff(oldDoc, newDoc);
 72    assertEquals(0, diff.getClassDiffs().size());
 73  }
 74
 75  public void testAddedMethod() throws Exception {
 76    XMLReportDiffer differ = new XMLReportDiffer();
 77    Document oldDoc = makeTestDoc("<class class='Foo' cost='12'></class>");
 78    Document newDoc = makeTestDoc("<class class='Foo' cost='12'>" +
 79        "<method cyclomatic='135' global='10' line='233' lod='1' " +
 80        " name='execute()' overall='236'/></class>");
 81    Diff diff = differ.diff(oldDoc, newDoc);
 82    assertEquals(1, diff.getClassDiffs().size());
 83    Diff.ClassDiff classDiff = diff.getClassDiffs().get(0);
 84    assertEquals(1, classDiff.getMethodDiffs().size());
 85    Diff.MethodDiff methodDiff = classDiff.getMethodDiffs().get(0);
 86    assertEquals("execute()", methodDiff.getMethodName());
 87    assertEquals(null, methodDiff.getOldMetric());
 88    assertEquals(236, methodDiff.getNewMetric().intValue());
 89  }
 90
 91  public void testRemovedMethod() throws Exception {
 92    XMLReportDiffer differ = new XMLReportDiffer();
 93    Document oldDoc = makeTestDoc("<class class='Foo' cost='12'>" +
 94        "<method cyclomatic='135' global='10' line='233' lod='1' " +
 95        " name='execute()' overall='236'/></class>");
 96    Document newDoc = makeTestDoc("<class class='Foo' cost='12'></class>");
 97    Diff diff = differ.diff(oldDoc, newDoc);
 98    assertEquals(1, diff.getClassDiffs().size());
 99    Diff.ClassDiff classDiff = diff.getClassDiffs().get(0);
100    assertEquals(1, classDiff.getMethodDiffs().size());
101    Diff.MethodDiff methodDiff = classDiff.getMethodDiffs().get(0);
102    assertEquals("execute()", methodDiff.getMethodName());
103    assertEquals(236, methodDiff.getOldMetric().intValue());
104    assertEquals(null, methodDiff.getNewMetric());
105  }
106
107  public void testChangedMethod() throws Exception {
108    XMLReportDiffer differ = new XMLReportDiffer();
109    Document oldDoc = makeTestDoc("<class class='Foo' cost='12'>" +
110        "<method cyclomatic='135' global='10' line='233' lod='1' " +
111        " name='execute()' overall='236'/></class>");
112    Document newDoc = makeTestDoc("<class class='Foo' cost='12'></class>");
113    Diff diff = differ.diff(oldDoc, newDoc);
114    assertEquals(1, diff.getClassDiffs().size());
115    Diff.ClassDiff classDiff = diff.getClassDiffs().get(0);
116    assertEquals(1, classDiff.getMethodDiffs().size());
117    Diff.MethodDiff methodDiff = classDiff.getMethodDiffs().get(0);
118    assertEquals("execute()", methodDiff.getMethodName());
119    assertEquals(236, methodDiff.getOldMetric().intValue());
120    assertEquals(null, methodDiff.getNewMetric());
121  }
122
123  private Document makeTestDoc(String content)
124      throws ParserConfigurationException, IOException, SAXException {
125    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
126    DocumentBuilder builder = factory.newDocumentBuilder();
127    return builder.parse(new InputSource(new StringReader(content)));
128  }
129}