### Question:
BranchPair { @Override public boolean equals(Object obj) { if(obj == null){ return false; } if(obj instanceof BranchPair){ BranchPair otherBranchPair = (BranchPair) obj; if(otherBranchPair.getFirstBranch() == null){ if(this.firstBranch != null){ return false; } }else{ if(!otherBranchPair.getFirstBranch().equals(this.firstBranch)){ return false; } } if(otherBranchPair.getSecondBranch() == null){ if(this.secondBranch != null){ return false; } }else { if(!otherBranchPair.getSecondBranch().equals(this.secondBranch)){ return false; } } return true; } return false; } BranchPair(Branch firstBranch,Branch secondBranch, BytecodeInstruction callSite);  BranchPair(Branch firstBranch,Branch secondBranch, BytecodeInstruction callSite, boolean expression); Branch getFirstBranch(); Branch getSecondBranch(); @Override boolean equals(Object obj); boolean isDependent(); boolean getExpression(); BytecodeInstruction getCallSite();  }### Answer:
@Test public void testEquals(){ BranchPair branchPair1 = new BranchPair(branch1,branch2,callSite); BranchPair branchPair2 = new BranchPair(branch1,branch2,callSite,true); Assert.assertTrue(branchPair1.equals(branchPair2)); Assert.assertFalse(branchPair1.equals(null)); Assert.assertFalse(branchPair1.equals("")); }