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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.IO;
using System.Web.Razor.Parser;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Web.Razor.Test.Text
{
public class TextReaderExtensionsTest
{
[Fact]
public void ReadUntilWithCharThrowsArgNullIfReaderNull()
{
Assert.ThrowsArgumentNull(() => TextReaderExtensions.ReadUntil(null, '@'), "reader");
}
[Fact]
public void ReadUntilInclusiveWithCharThrowsArgNullIfReaderNull()
{
Assert.ThrowsArgumentNull(() => TextReaderExtensions.ReadUntil(null, '@', inclusive: true), "reader");
}
[Fact]
public void ReadUntilWithMultipleTerminatorsThrowsArgNullIfReaderNull()
{
Assert.ThrowsArgumentNull(() => TextReaderExtensions.ReadUntil(null, '/', '>'), "reader");
}
[Fact]
public void ReadUntilInclusiveWithMultipleTerminatorsThrowsArgNullIfReaderNull()
{
// NOTE: Using named parameters would be difficult here, hence the inline comment
Assert.ThrowsArgumentNull(() => TextReaderExtensions.ReadUntil(null, /* inclusive */ true, '/', '>'), "reader");
}
[Fact]
public void ReadUntilWithPredicateThrowsArgNullIfReaderNull()
{
Assert.ThrowsArgumentNull(() => TextReaderExtensions.ReadUntil(null, c => true), "reader");
}
[Fact]
public void ReadUntilInclusiveWithPredicateThrowsArgNullIfReaderNull()
{
Assert.ThrowsArgumentNull(() => TextReaderExtensions.ReadUntil(null, c => true, inclusive: true), "reader");
}
[Fact]
public void ReadUntilWithPredicateThrowsArgExceptionIfPredicateNull()
{
Assert.ThrowsArgumentNull(() => TextReaderExtensions.ReadUntil(new StringReader("Foo"), (Predicate<char>)null), "condition");
}
[Fact]
public void ReadUntilInclusiveWithPredicateThrowsArgExceptionIfPredicateNull()
{
Assert.ThrowsArgumentNull(() => TextReaderExtensions.ReadUntil(new StringReader("Foo"), (Predicate<char>)null, inclusive: true), "condition");
}
[Fact]
public void ReadWhileWithPredicateThrowsArgNullIfReaderNull()
{
Assert.ThrowsArgumentNull(() => TextReaderExtensions.ReadWhile(null, c => true), "reader");
}
[Fact]
public void ReadWhileInclusiveWithPredicateThrowsArgNullIfReaderNull()
{
Assert.ThrowsArgumentNull(() => TextReaderExtensions.ReadWhile(null, c => true, inclusive: true), "reader");
}
[Fact]
public void ReadWhileWithPredicateThrowsArgNullIfPredicateNull()
{
Assert.ThrowsArgumentNull(() => TextReaderExtensions.ReadWhile(new StringReader("Foo"), (Predicate<char>)null), "condition");
}
[Fact]
public void ReadWhileInclusiveWithPredicateThrowsArgNullIfPredicateNull()
{
Assert.ThrowsArgumentNull(() => TextReaderExtensions.ReadWhile(new StringReader("Foo"), (Predicate<char>)null, inclusive: true), "condition");
}
[Fact]
public void ReadUntilWithCharReadsAllTextUpToSpecifiedCharacterButNotPast()
{
RunReaderTest("foo bar baz @biz", "foo bar baz ", '@', r => r.ReadUntil('@'));
}
[Fact]
public void ReadUntilWithCharWithInclusiveFlagReadsAllTextUpToSpecifiedCharacterButNotPastIfInclusiveFalse()
{
RunReaderTest("foo bar baz @biz", "foo bar baz ", '@', r => r.ReadUntil('@', inclusive: false));
}
[Fact]
public void ReadUntilWithCharWithInclusiveFlagReadsAllTextUpToAndIncludingSpecifiedCharacterIfInclusiveTrue()
{
RunReaderTest("foo bar baz @biz", "foo bar baz @", 'b', r => r.ReadUntil('@', inclusive: true));
}
[Fact]
public void ReadUntilWithCharReadsToEndIfSpecifiedCharacterNotFound()
{
RunReaderTest("foo bar baz", "foo bar baz", -1, r => r.ReadUntil('@'));
}
[Fact]
public void ReadUntilWithMultipleTerminatorsReadsUntilAnyTerminatorIsFound()
{
RunReaderTest("<bar/>", "<bar", '/', r => r.ReadUntil('/', '>'));
}
[Fact]
public void ReadUntilWithMultipleTerminatorsHonorsInclusiveFlagWhenFalse()
{
// NOTE: Using named parameters would be difficult here, hence the inline comment
RunReaderTest("<bar/>", "<bar", '/', r => r.ReadUntil( /* inclusive */ false, '/', '>'));
}
[Fact]
public void ReadUntilWithMultipleTerminatorsHonorsInclusiveFlagWhenTrue()
{
// NOTE: Using named parameters would be difficult here, hence the inline comment
RunReaderTest("<bar/>", "<bar/", '>', r => r.ReadUntil( /* inclusive */ true, '/', '>'));
}
[Fact]
public void ReadUntilWithPredicateStopsWhenPredicateIsTrue()
{
RunReaderTest("foo bar baz 0 zoop zork zoink", "foo bar baz ", '0', r => r.ReadUntil(c => Char.IsDigit(c)));
}
[Fact]
public void ReadUntilWithPredicateHonorsInclusiveFlagWhenFalse()
{
RunReaderTest("foo bar baz 0 zoop zork zoink", "foo bar baz ", '0', r => r.ReadUntil(c => Char.IsDigit(c), inclusive: false));
}
[Fact]
public void ReadUntilWithPredicateHonorsInclusiveFlagWhenTrue()
{
RunReaderTest("foo bar baz 0 zoop zork zoink", "foo bar baz 0", ' ', r => r.ReadUntil(c => Char.IsDigit(c), inclusive: true));
}
[Fact]
public void ReadWhileWithPredicateStopsWhenPredicateIsFalse()
{
RunReaderTest("012345a67890", "012345", 'a', r => r.ReadWhile(c => Char.IsDigit(c)));
}
[Fact]
public void ReadWhileWithPredicateHonorsInclusiveFlagWhenFalse()
{
RunReaderTest("012345a67890", "012345", 'a', r => r.ReadWhile(c => Char.IsDigit(c), inclusive: false));
}
[Fact]
public void ReadWhileWithPredicateHonorsInclusiveFlagWhenTrue()
{
RunReaderTest("012345a67890", "012345a", '6', r => r.ReadWhile(c => Char.IsDigit(c), inclusive: true));
}
private static void RunReaderTest(string testString, string expectedOutput, int expectedPeek, Func<TextReader, string> action)
{
// Arrange
StringReader reader = new StringReader(testString);
// Act
string read = action(reader);
// Assert
Assert.Equal(expectedOutput, read);
if (expectedPeek == -1)
{
Assert.True(reader.Peek() == -1, "Expected that the reader would be positioned at the end of the input stream");
}
else
{
Assert.Equal((char)expectedPeek, (char)reader.Peek());
}
}
}
}
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