private static string ReadAllAttributes(string input)
{
StringBuilder output = new StringBuilder();
StringReader sr = new StringReader(input);
HtmlTextReader reader = new HtmlTextReader(sr);
while (sr.Peek() >= 0)
{
string name = reader.ReadAttributeName();
string value = reader.ReadAttributeValue();
if (!string.IsNullOrEmpty(name))
{
output.Append(output.Length > 0 ? " " : "");
output.Append(name + "='" + value + "'");
}
}
return(output.ToString());
}
public void ReadQuotedAttribute()
{
string input;
HtmlTextReader reader;
string output;
// Ensure we parse to end of single quotes...
input = " ='abc' ";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abc", output);
// Ensure we parse to end of double quotes...
input = " =\"abc\" ";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abc", output);
// Ignore double quotes in the middle
input = " ='abc\"def' ";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abc\"def", output);
// Ignore end tag in the middle of quotes
input = " ='abc>def' ";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abc>def", output);
// Parse until end of string with open quote
input = "= 'abcdef ";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abcdef ", output);
// Parse until end of string with open quote
input = "= \"abcdef ";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abcdef ", output);
// Not checking whitespace inside quotes
input = " =\"abcdef ";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abcdef ", output);
// Ignore single quotes in the middle of double quotes
input = " =\"abc'def\" ";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abc'def", output);
// Ignore end tag in the middle of quotes
input = " =\"abc>def\" ";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abc>def", output);
// Ensure we don't consume the >.
input = " ='abcdef'>";
StringReader sr = new StringReader(input);
reader = new HtmlTextReader(sr);
output = reader.ReadAttributeValue();
Assert.AreEqual("abcdef", output);
Assert.AreEqual('>', (char)reader.Peek());
}
public void ReadAttrNameAndVal()
{
string input;
StringReader sr;
HtmlTextReader reader;
input = "class='red' ";
sr = new StringReader(input);
reader = new HtmlTextReader(sr);
Assert.AreEqual("class", reader.ReadAttributeName());
Assert.AreEqual("red", reader.ReadAttributeValue());
input = "class = \"red\" ";
sr = new StringReader(input);
reader = new HtmlTextReader(sr);
Assert.AreEqual("class", reader.ReadAttributeName());
Assert.AreEqual("red", reader.ReadAttributeValue());
input = " class =red ";
sr = new StringReader(input);
reader = new HtmlTextReader(sr);
Assert.AreEqual("class", reader.ReadAttributeName());
Assert.AreEqual("red", reader.ReadAttributeValue());
input = " class = red ";
sr = new StringReader(input);
reader = new HtmlTextReader(sr);
Assert.AreEqual("class", reader.ReadAttributeName());
Assert.AreEqual("red", reader.ReadAttributeValue());
input = " class = 'red' ";
sr = new StringReader(input);
reader = new HtmlTextReader(sr);
Assert.AreEqual("class", reader.ReadAttributeName());
Assert.AreEqual("red", reader.ReadAttributeValue());
// Make sure forward slashes are skipped in the right places...
input = " /class = /red ";
sr = new StringReader(input);
reader = new HtmlTextReader(sr);
Assert.AreEqual("class", reader.ReadAttributeName());
Assert.AreEqual("/red", reader.ReadAttributeValue());
// Make sure forward slashes are skipped in the right places...
input = " class/ = red ";
sr = new StringReader(input);
reader = new HtmlTextReader(sr);
Assert.AreEqual("class", reader.ReadAttributeName());
Assert.AreEqual("", reader.ReadAttributeValue());
Assert.AreEqual("=", reader.ReadAttributeName());
Assert.AreEqual("", reader.ReadAttributeValue());
Assert.AreEqual("red", reader.ReadAttributeName());
Assert.AreEqual("", reader.ReadAttributeValue());
// Make sure forward slashes are skipped in the right places...
input = " /class /= /red ";
sr = new StringReader(input);
reader = new HtmlTextReader(sr);
Assert.AreEqual("class", reader.ReadAttributeName());
Assert.AreEqual(String.Empty, reader.ReadAttributeValue());
Assert.AreEqual("=", reader.ReadAttributeName());
Assert.AreEqual(String.Empty, reader.ReadAttributeValue());
Assert.AreEqual("red", reader.ReadAttributeName());
Assert.AreEqual(String.Empty, reader.ReadAttributeValue());
}
public void ReadUnquotedAttribute()
{
string input;
HtmlTextReader reader;
string output;
// no whitespace
input = "=abc";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abc", output);
// Starting whitespace
input = " =abc";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abc", output);
// Starting whitespace
input = " \t\n\r=abc";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abc", output);
// Ending whitespace
input = "=abc ";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abc", output);
// Whitespace start and end
input = " = abc ";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abc", output);
// Whitespace start and end
input = " =\t\n\rabc \n\r";
reader = new HtmlTextReader(new StringReader(input));
output = reader.ReadAttributeValue();
Assert.AreEqual("abc", output);
// Whitespace end tag in the middle. Ensure
// we don't consume the char.
input = "= abc>def ";
StringReader sr = new StringReader(input);
reader = new HtmlTextReader(sr);
output = reader.ReadAttributeValue();
Assert.AreEqual("abc", output);
Assert.AreEqual('d', (char)reader.Peek());
Assert.AreEqual(ParseState.Text, reader.ParseState);
// Ensure we don't consume the last space.
input = " =abcdef ";
sr = new StringReader(input);
reader = new HtmlTextReader(sr);
output = reader.ReadAttributeValue();
Assert.AreEqual("abcdef", output);
Assert.AreEqual(' ', (char)reader.Peek());
}