@Test
 public void getBasicIntervalReturnsAnIntervalIfOneMatches() {
   CompoundInterval ci = createCompoundIntervalWithoutRegister();
   BasicInterval bi = ci.getBasicInterval(DEFAULT_END);
   assertThat(bi.getBegin(), is(DEFAULT_BEGIN));
   assertThat(bi.getEnd(), is(DEFAULT_END));
 }
 @Test
 public void getBasicIntervalReturnsIntervalWithGreatestStartIfMultipleMatch() {
   CompoundInterval ci = new CompoundInterval(DEFAULT_BEGIN, DEFAULT_END, null);
   ci.add(new BasicInterval(DEFAULT_BEGIN, DEFAULT_END + 1));
   BasicInterval bi = ci.getBasicInterval(DEFAULT_END);
   assertThat(bi.getBegin(), is(DEFAULT_BEGIN));
   assertThat(bi.getEnd(), is(DEFAULT_END + 1));
 }
 @Test
 public void getBasicIntervalRegAllocStateReturnsAnIntervalIfOneMatches() {
   CompoundInterval ci = createCompoundIntervalWithoutRegister();
   RegisterAllocatorState regAllocState = new RegisterAllocatorState(1);
   regAllocState.initializeDepthFirstNumbering(20);
   Instruction writeFloor = Empty.create(WRITE_FLOOR);
   regAllocState.setDFN(writeFloor, DEFAULT_END);
   BasicInterval bi = ci.getBasicInterval(regAllocState, writeFloor);
   assertThat(bi.getBegin(), is(DEFAULT_BEGIN));
   assertThat(bi.getEnd(), is(DEFAULT_END));
 }
 @Test
 public void getBasicIntervalRegAllocStateReturnsIntervalWithGreatestStartIfMultipleMatch() {
   CompoundInterval ci = new CompoundInterval(DEFAULT_BEGIN, DEFAULT_END, null);
   ci.add(new BasicInterval(DEFAULT_BEGIN, DEFAULT_END + 1));
   RegisterAllocatorState regAllocState = new RegisterAllocatorState(1);
   regAllocState.initializeDepthFirstNumbering(20);
   Instruction writeFloor = Empty.create(WRITE_FLOOR);
   regAllocState.setDFN(writeFloor, DEFAULT_END);
   BasicInterval bi = ci.getBasicInterval(regAllocState, writeFloor);
   assertThat(bi.getBegin(), is(DEFAULT_BEGIN));
   assertThat(bi.getEnd(), is(DEFAULT_END + 1));
 }