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using System;
using System.Text;
using System.Collections.Generic;
using System.IO;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace JSCompiler.Core.Tests
{
[TestClass]
public class BaseInputStreamTests
{
[TestMethod]
public void IsEndOfStream_WhenNotEnd_ReturnsFalse()
{
byte[] buff = new byte[3] { 32, 14, 25 };
MemoryStream memStream = new MemoryStream(buff);
BaseInputStream testInputStream = new BaseInputStream(memStream);
bool isEnd;
for(int i = 0; i < 2; i++)
{
isEnd = testInputStream.IsEndOfStream();
testInputStream.Next();
Assert.IsFalse(isEnd);
}
}
[TestMethod]
public void IsEndOfStream_AtBeginningWithoutData_ReturnsTrue()
{
MemoryStream memStream = new MemoryStream();
BaseInputStream testInputStream = new BaseInputStream(memStream);
bool isEnd = testInputStream.IsEndOfStream();
Assert.IsTrue(isEnd);
}
[TestMethod]
public void IsEndOfStream_WhenEnd_ReturnsTrue()
{
byte[] buff = new byte[3] { 32, 14, 25 };
MemoryStream memStream = new MemoryStream(buff);
BaseInputStream testInputStream = new BaseInputStream(memStream);
for (int i = 0; i < 3; i++, testInputStream.Next());
bool isEnd = testInputStream.IsEndOfStream();
Assert.IsTrue(isEnd);
}
[TestMethod]
public void Peek_AtPosition_ReturnsCorrectItemFromStream()
{
byte[] buff = new byte[8] { 32, 14, 25, 14, 12, 51, 25, 33 };
MemoryStream memStream = new MemoryStream(buff);
BaseInputStream testInputStream = new BaseInputStream(memStream);
char item;
for (int i = 0; i < 5; i++, testInputStream.Next())
{
item = testInputStream.Peek();
Assert.AreEqual((char)buff[i], item);
}
}
[TestMethod]
public void Peek_AtEnd_ReturnsEndItem()
{
byte[] buff = new byte[3] { 32, 14, 25 };
MemoryStream memStream = new MemoryStream(buff);
BaseInputStream testInputStream = new BaseInputStream(memStream);
for (int i = 0; i < 3; i++, testInputStream.Next());
char last = testInputStream.Peek();
Assert.AreEqual(0, last);
}
[TestMethod]
[ExpectedException(typeof(EndOfStreamException))]
public void Next_WhenEndStream_ThrowsEndOfStreamException()
{
byte[] buff = new byte[3] { 32, 14, 25 };
MemoryStream memStream = new MemoryStream(buff);
BaseInputStream testInputStream = new BaseInputStream(memStream);
for (int i = 0; i < 4; i++, testInputStream.Next());
}
[TestMethod]
public void Next_WhenBuffersAreSwapped_ReturnsCorrectItem()
{
byte[] buff = new byte[10] { 32, 14, 25, 14, 23, 42, 16, 21, 15, 76 };
MemoryStream memStream = new MemoryStream(buff);
BaseInputStream testInputStream = new BaseInputStream(memStream, 3);
for (int i = 0; i < 10; i++)
{
char curr = testInputStream.Next();
Assert.AreEqual((char)buff[i], curr);
}
}
[TestMethod]
public void Line_NewLinesTracking_ReturnsCorrectNumberOfLines()
{
byte[] buff = new byte[10] { (byte) '\n', 32, 14, 25, 14, (byte) '\n', 42, 16, (byte) '\n', (byte)'\n' };
MemoryStream memStream = new MemoryStream(buff);
BaseInputStream testInputStream = new BaseInputStream(memStream);
for (int i = 0; i < 10; i++, testInputStream.Next());
Assert.AreEqual(4, testInputStream.Line);
}
}
}
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