public string GenerateTests(
string val, RegexOptions options, bool runSubTreeTests, string testName,
bool allowIndexOutOfRange, bool allowNullReference, bool allowOutOfMemory)
{
// Actually call into our regex APIs to produce figure out the tree produced.
// Then spit out a test that does the same, encoding the tree as the expected
var builder = new StringBuilder();
builder.AppendLine("[Fact]");
builder.AppendLine("public void " + testName + "()");
builder.AppendLine("{");
builder.Append(@" Test(");
var escaped = val.Replace("\"", "\"\"");
var quoted = "" + '@' + '"' + escaped + '"';
builder.Append(quoted);
var token = GetStringToken(val);
var allChars = _service.TryConvertToVirtualChars(token);
var tree = RegexParser.TryParse(allChars, options);
var actual = TreeToText(token.SyntaxTree.GetText(), tree).Replace("\"", "\"\"");
builder.Append(", " + '@' + '"');
builder.Append(actual);
builder.Append('"');
builder.Append(", RegexOptions." + options.ToString());
if (!runSubTreeTests)
{
builder.Append(", runSubTreeTests: false");
}
if (allowIndexOutOfRange)
{
builder.Append(", allowIndexOutOfRange: true");
}
if (allowNullReference)
{
builder.Append(", allowNullReference: true");
}
if (allowOutOfMemory)
{
builder.Append(", allowOutOfMemory: true");
}
builder.AppendLine(");");
builder.AppendLine("}");
return(builder.ToString());
}
private (SyntaxToken, RegexTree, VirtualCharSequence) JustParseTree(
string stringText, RegexOptions options, bool conversionFailureOk)
{
var token = GetStringToken(stringText);
var allChars = _service.TryConvertToVirtualChars(token);
if (allChars.IsDefault)
{
Assert.True(conversionFailureOk, "Failed to convert text to token.");
return(token, null, allChars);
}
var tree = RegexParser.TryParse(allChars, options);
return(token, tree, allChars);
}