public async Task Diagnostic_InvalidRegexPattern(string pattern)
{
IReadOnlyList<Diagnostic> diagnostics = await RegexGeneratorHelper.RunGenerator($@"
using System.Text.RegularExpressions;
partial class C
{{
[RegexGenerator({pattern})]
private static partial Regex InvalidPattern();
}}
");
Assert.Equal("SYSLIB1042", Assert.Single(diagnostics).Id);
}
public async Task Diagnostic_MultipleAttributes()
{
IReadOnlyList<Diagnostic> diagnostics = await RegexGeneratorHelper.RunGenerator(@"
using System.Text.RegularExpressions;
partial class C
{
[RegexGenerator(""ab"")]
[RegexGenerator(""abc"")]
private static partial Regex MultipleAttributes();
}
");
Assert.Equal("SYSLIB1041", Assert.Single(diagnostics).Id);
}
public async Task Diagnostic_MalformedCtor(string attribute)
{
// Validate the generator doesn't crash with an incomplete attribute
IReadOnlyList<Diagnostic> diagnostics = await RegexGeneratorHelper.RunGenerator($@"
using System.Text.RegularExpressions;
partial class C
{{
{attribute}
private static partial Regex MultipleAttributes();
}}
");
if (diagnostics.Count != 0)
{
Assert.Contains(Assert.Single(diagnostics).Id, new[] { "SYSLIB1040", "SYSLIB1042" });
}
}
