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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.IO;
using Xunit;
namespace System.IO.Tests
{
public class ReaderTests
{
[Fact]
public static void StringReaderWithNullString()
{
Assert.Throws<ArgumentNullException>(() => new StringReader(null));
}
[Fact]
public static void StringReaderWithEmptyString()
{
// [] Check vanilla construction
//-----------------------------------------------------------
StringReader sr = new StringReader(string.Empty);
Assert.Equal(string.Empty, sr.ReadToEnd());
}
[Fact]
public static void StringReaderWithGenericString()
{
// [] Another vanilla construction
//-----------------------------------------------------------
StringReader sr = new StringReader("Hello\0World");
Assert.Equal("Hello\0World", sr.ReadToEnd());
}
[Fact]
public static void ReadEmptyString() {
StringReader sr = new StringReader(string.Empty);
Assert.Equal(-1, sr.Read());
}
[Fact]
public static void ReadString() {
string str1 = "Hello\0\t\v \\ World";
StringReader sr = new StringReader(str1);
for (int i = 0; i < str1.Length; i++)
{
Assert.Equal((int)str1[i], sr.Read());
}
}
[Fact]
public static void ReadLine()
{
string str1 = "Hello\0\t\v \\ World";
string str2 = str1 + Environment.NewLine + str1;
using (StringReader sr = new StringReader(str1))
{
Assert.Equal(str1, sr.ReadLine());
}
using (StringReader sr = new StringReader(str2))
{
Assert.Equal(str1, sr.ReadLine());
Assert.Equal(str1, sr.ReadLine());
}
}
[Fact]
public static void ReadPseudoRandomString()
{
string str1 = string.Empty;
Random r = new Random(-55);
for (int i = 0; i < 5000; i++)
str1 += (char)r.Next(0, 255);
StringReader sr = new StringReader(str1);
for (int i = 0; i < str1.Length; i++)
{
Assert.Equal((int)str1[i], sr.Read());
}
}
[Fact]
public static void PeekEmptyString()
{
StringReader sr = new StringReader(string.Empty);
Assert.Equal(-1, sr.Peek());
}
[Fact]
public static void PeekString()
{
string str1 = "Hello\0\t\v \\ World";
StringReader sr = new StringReader(str1);
for (int i = 0; i < str1.Length; i++)
{
int test = sr.Peek();
sr.Read();
Assert.Equal((int)str1[i], test);
}
}
[Fact]
public static void PeekPseudoRandomString()
{
string str1 = string.Empty;
Random r = new Random(-55);
for (int i = 0; i < 5000; i++)
str1 += (char)r.Next(0, 255);
StringReader sr = new StringReader(str1);
for (int i = 0; i < str1.Length; i++)
{
int test = sr.Peek();
sr.Read();
Assert.Equal((int)str1[i], test);
}
}
[Fact]
public static void ReadToEndEmptyString()
{
///////////////////////// START TESTS ////////////////////////////
///////////////////////////////////////////////////////////////////
StringReader sr;
sr = new StringReader(string.Empty);
Assert.Equal(string.Empty, sr.ReadToEnd());
}
[Fact]
public static void ReadToEndString() {
string str1 = "Hello\0\t\v \\ World";
StringReader sr = new StringReader(str1);
Assert.Equal(str1, sr.ReadToEnd());
}
[Fact]
public static void ReadToEndPseudoRandom() {
// [] Try with large random strings
//-----------------------------------------------------------
string str1 = string.Empty;
Random r = new Random(-55);
for (int i = 0; i < 10000; i++)
str1 += (char)r.Next(0, 255);
StringReader sr = new StringReader(str1);
Assert.Equal(str1, sr.ReadToEnd());
}
[Fact]
public static void Closed_DisposedExceptions()
{
StringReader sr = new StringReader("abcdefg");
sr.Close();
ValidateDisposedExceptions(sr);
}
[Fact]
public static void Disposed_DisposedExceptions()
{
StringReader sr = new StringReader("abcdefg");
sr.Dispose();
ValidateDisposedExceptions(sr);
}
private static void ValidateDisposedExceptions(StringReader sr)
{
Assert.Throws<ObjectDisposedException>(() => { sr.Peek(); });
Assert.Throws<ObjectDisposedException>(() => { sr.Read(); });
Assert.Throws<ObjectDisposedException>(() => { sr.Read(new char[10], 0 , 1); });
}
}
}
|
