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//
// BitArrayTest.cs - NUnit Test Cases for the System.Collections.BitArray class
//
// Author: David Menestrina (dmenest@yahoo.com)
//
using NUnit.Framework;
using System.Collections;
using System;
namespace MonoTests.System.Collections
{
[TestFixture]
public class BitArrayTest
{
private BitArray testBa;
private bool [] testPattern;
private BitArray op1;
private BitArray op2;
private void verifyPattern(BitArray ba, bool[] pattern)
{
Assert.AreEqual (ba.Length, pattern.Length);
for (int i = 0; i < pattern.Length; i++)
Assert.AreEqual (ba[i], pattern[i]);
}
[SetUp]
public void SetUp()
{
testPattern = new bool[70];
int i;
for(i = 0; i < testPattern.Length/2; i++)
testPattern[i] = ((i % 2) == 0);
for(; i < testPattern.Length; i++)
testPattern[i] = ((i % 2) != 0);
testBa = new BitArray(70);
for(i = 0; i < testBa.Length/2; i++)
testBa[i] = ((i % 2) == 0);
for(; i < testBa.Length; i++)
testBa[i] = ((i % 2) != 0);
// for TestAnd, TestOr, TestNot, TestXor
op1 = new BitArray(new int[] { 0x33333333, 0x33333333 });
op2 = new BitArray(new int[] { 0x66666666, 0x66666666 });
}
[Test]
public void TestBoolConstructor()
{
BitArray ba = new BitArray(testPattern);
verifyPattern(ba, testPattern);
}
[Test]
public void TestCopyConstructor()
{
BitArray ba = new BitArray(testBa);
verifyPattern(ba, testPattern);
}
[Test]
public void TestByteConstructor()
{
byte [] byteArr = new byte[] { 0xaa, 0x55, 0xaa, 0x55, 0x80 };
BitArray ba = new BitArray(byteArr);
Assert.AreEqual (ba.Length, byteArr.Length * 8, "Lengths not equal");
// spot check
Assert.IsTrue (ba[7], "7 not true");
Assert.IsTrue (!ba[6], "6 not false");
Assert.IsTrue (!ba[15], "15 not false");
Assert.IsTrue (ba[14], "14 not true");
Assert.IsTrue (ba[39], "39 not true");
Assert.IsTrue (!ba[35], "35 not false");
}
[Test]
public void TestIntConstructor()
{
int [] intArr = new int[] { ~0x55555555, 0x55555551 };
BitArray ba = new BitArray(intArr);
Assert.AreEqual (ba.Length, intArr.Length * 32);
// spot check
Assert.IsTrue (ba[31]);
Assert.IsTrue (!ba[30]);
Assert.IsTrue (!ba[63]);
Assert.IsTrue (ba[62]);
Assert.IsTrue (ba[32]);
Assert.IsTrue (!ba[35]);
}
[Test]
public void TestValConstructor()
{
BitArray ba = new BitArray(64, false);
Assert.AreEqual (ba.Length, 64);
foreach (bool b in ba)
Assert.IsTrue (!b);
ba = new BitArray(64, true);
Assert.AreEqual (ba.Length, 64);
foreach (bool b in ba)
Assert.IsTrue (b);
}
[Test]
public void TestClone()
{
BitArray ba = (BitArray)testBa.Clone();
verifyPattern(ba, testPattern);
// ensure that changes in ba don't get propagated to testBa
ba[0] = false;
ba[1] = false;
ba[2] = false;
verifyPattern(testBa, testPattern);
}
[Test]
public void TestSetLength()
{
int origLen = testBa.Length;
testBa.Length += 33;
Assert.AreEqual (origLen + 33, testBa.Length);
for (int i = origLen; i < testBa.Length; i++)
testBa[i] = true;
testBa.Length -= 33;
verifyPattern(testBa, testPattern);
}
[Test]
public void TestAnd()
{
BitArray result = op1.And(op2);
Assert.AreEqual (result.Length, op1.Length);
for (int i = 0; i < result.Length; )
{
Assert.IsTrue (!result[i++]);
Assert.IsTrue (result[i++]);
Assert.IsTrue (!result[i++]);
Assert.IsTrue (!result[i++]);
}
}
[Test]
public void TestOr()
{
BitArray result = op1.Or(op2);
Assert.AreEqual (result.Length, op1.Length);
for (int i = 0; i < result.Length; )
{
Assert.IsTrue (result[i++]);
Assert.IsTrue (result[i++]);
Assert.IsTrue (result[i++]);
Assert.IsTrue (!result[i++]);
}
}
[Test]
public void TestNot()
{
BitArray result = op1.Not();
Assert.AreEqual (result.Length, op1.Length);
for (int i = 0; i < result.Length; )
{
Assert.IsTrue (!result[i++]);
Assert.IsTrue (!result[i++]);
Assert.IsTrue (result[i++]);
Assert.IsTrue (result[i++]);
}
}
[Test]
public void TestXor()
{
BitArray result = op1.Xor(op2);
Assert.AreEqual (result.Length, op1.Length);
for (int i = 0; i < result.Length; )
{
Assert.IsTrue (result[i++]);
Assert.IsTrue (!result[i++]);
Assert.IsTrue (result[i++]);
Assert.IsTrue (!result[i++]);
}
}
[Test]
public void TestSetAll()
{
testBa.SetAll(false);
foreach(bool b in testBa)
Assert.IsTrue (!b);
testBa.SetAll(true);
foreach(bool b in testBa)
Assert.IsTrue (b);
}
[Test]
public void TestCopyToBool()
{
try {
bool[] barray = new bool[testBa.Length + 10];
testBa.CopyTo(barray, 5);
for (int i = 0; i < testBa.Length; i++)
Assert.AreEqual (testBa[i], barray[i+5]);
}
catch(Exception e){
Assert.Fail ("Unexpected exception thrown: " + e.ToString());
}
}
[Test]
public void CopyToEmptyEmpty () {
BitArray bitarray = new BitArray(0);
int[] intarray = new int[0];
bitarray.CopyTo(intarray, 0);
}
[Test]
public void TestCopyToByte()
{
try {
testBa.Length = 34;
byte[] barray = new byte[5 + 10];
testBa.CopyTo(barray, 5);
for (int i = 5; i < 9; i++)
Assert.AreEqual (0x55, barray[i] & 0xff);
// FIXME: MS fails on the next line. This is because
// we truncated testBa.Length, and MS's internal array still
// has the old bits set. CopyTo() doesn't say specifically
// whether the "junk" bits (bits past Length, but within Length
// rounded up to 32) will be copied as 0, or if those bits are
// undefined.
//Assert.AreEqual (0x01, barray[9] & 0xff);
}
catch(Exception e){
Assert.Fail ("Unexpected exception thrown: " + e.ToString());
}
}
[Test]
public void TestCopyToInt()
{
try {
testBa.Length = 34;
int[] iarray = new int[2 + 10];
testBa.CopyTo(iarray, 5);
Assert.AreEqual (0x55555555, iarray[5]);
// FIXME: Same thing here as in TestCopyToByte
//Assert.AreEqual (0x01, iarray[6]);
}
catch(Exception e){
Assert.Fail ("Unexpected exception thrown: " + e.ToString());
}
}
[Test]
public void TestEnumerator()
{
try {
IEnumerator e = testBa.GetEnumerator();
for (int i = 0; e.MoveNext(); i++)
Assert.AreEqual (e.Current, testPattern[i]);
Assert.IsTrue (!e.MoveNext());
// read, to make sure reading isn't considered a write.
bool b = testBa[0];
e.Reset();
for (int i = 0; e.MoveNext(); i++)
Assert.AreEqual (e.Current, testPattern[i]);
try
{
e.Reset();
testBa[0] = !testBa[0];
e.MoveNext();
Assert.Fail ("IEnumerator.MoveNext() should throw when collection modified.");
}
catch (InvalidOperationException)
{
}
}
catch(Exception ex){
Assert.Fail ("Unexpected exception thrown: " + ex.ToString());
}
}
}
}
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