### Question:
Pattern implements Comparable<Pattern> { public boolean matches(int[] tuple) { for (int i = 0; i < ids.length; i += 1) { int id = ids[i]; PatternEntry entry = patternEntries[i]; if (! entry.matches(tuple[id])) { return false; } } return true; } Pattern(Map<Integer, PatternEntry> attributes); boolean matches(int[] tuple); @Override String toString(); @Override boolean equals(Object o); @Override int hashCode(); Int2ReferenceArrayMap<PatternEntry> getAttributes(); void setAttributes(Map<Integer, PatternEntry> attributes); int[] getIds(); PatternEntry[] getPatternEntries(); float getSupport(); void setSupport(float support); float getConfidence(); List<IntArrayList> getCover(); void setCover(List<IntArrayList> cover); int getNumKeepers(); void setNumKeepers(int numKeepers); int getNumCover(); void updateCover(Pattern pattern); void updateKeepers(int[] rhs); double calculateG1(int[] rhs); @Override int compareTo(Pattern other);  }### Answer:
@Test public void testVariablePatternEntryMatching() { VariablePatternEntry entry = new VariablePatternEntry(); Assert.assertTrue(entry.matches(1)); Assert.assertTrue(entry.matches(123)); Assert.assertTrue(entry.matches(444)); }
@Test public void testConstantPatternEntryMatching() { ConstantPatternEntry entry = new ConstantPatternEntry(42); Assert.assertFalse(entry.matches(1)); Assert.assertFalse(entry.matches(123)); Assert.assertFalse(entry.matches(444)); Assert.assertTrue(entry.matches(42)); }
@Test public void testPatternMatching() { Map<Integer, PatternEntry> attributes = new HashMap<>(); attributes.put(Integer.valueOf(0), new VariablePatternEntry()); attributes.put(Integer.valueOf(1), new ConstantPatternEntry(2)); attributes.put(Integer.valueOf(2), new ConstantPatternEntry(4)); Pattern pattern = new Pattern(attributes); Assert.assertTrue(pattern.matches(new int[] {1, 2, 4})); Assert.assertTrue(pattern.matches(new int[] {6, 2, 4})); Assert.assertFalse(pattern.matches(new int[] {6, 2, 5})); Assert.assertFalse(pattern.matches(new int[] {6, 3, 4})); }