/// <summary>
/// Helper method to VerifyDiagnosticResult that checks the location of a diagnostic and compares it with the location in the expected DiagnosticResult.
/// </summary>
/// <param name="analyzer">The analyzer that was being run on the sources</param>
/// <param name="diagnostic">The diagnostic that was found in the code</param>
/// <param name="actual">The Location of the Diagnostic found in the code</param>
/// <param name="expected">The DiagnosticResultLocation that should have been found</param>
private static VerifyDiagnosticAnalyzerResult VerifyDiagnosticLocation(
DiagnosticAnalyzer analyzer,
Diagnostic diagnostic,
Location actual,
DiagnosticResultLocation expected)
{
var actualSpan = actual.GetLineSpan();
var isInExpectedFile = actualSpan.Path == expected.Path ||
(actualSpan.Path != null &&
actualSpan.Path.Contains("Test0.") &&
expected.Path.Contains("Test."));
if (!isInExpectedFile)
{
string msg = GetNotInExpectedFileMessage(analyzer, diagnostic, expected, actualSpan);
return(VerifyDiagnosticAnalyzerResult.Fail(msg));
}
var actualLinePosition = actualSpan.StartLinePosition;
// Only check line position if there is an actual line in the real diagnostic
if (actualLinePosition.Line > 0)
{
if (actualLinePosition.Line + 1 != expected.Line)
{
string msg = GetNotInExpectedLineMessage(analyzer, diagnostic, expected, actualLinePosition);
return(VerifyDiagnosticAnalyzerResult.Fail(msg));
}
}
// Only check column position if there is an actual column position in the real diagnostic
if (actualLinePosition.Character > 0)
{
if (actualLinePosition.Character + 1 != expected.Column)
{
string msg = GetNotInExpectedColumn(analyzer, diagnostic, expected, actualLinePosition);
return(VerifyDiagnosticAnalyzerResult.Fail(msg));
}
}
return(VerifyDiagnosticAnalyzerResult.Ok());
}
/// <summary>
/// Checks each of the actual Diagnostics found and compares them with the corresponding DiagnosticResult in the array of expected results.
/// Diagnostics are considered equal only if the DiagnosticResultLocation, Id, Severity, and Message of the DiagnosticResult match the actual diagnostic.
/// </summary>
/// <param name="actualResults">The Diagnostics found by the compiler after running the analyzer on the source code</param>
/// <param name="analyzer">The analyzer that was being run on the sources</param>
/// <param name="expectedResults">Diagnostic Results that should have appeared in the code</param>
public static VerifyDiagnosticAnalyzerResult VerifyDiagnosticResults(
this DiagnosticAnalyzer analyzer,
IEnumerable <Diagnostic> actualResults,
DiagnosticResult[] expectedResults)
{
var expectedCount = expectedResults.Count();
var actualCount = actualResults.Count();
if (expectedCount != actualCount)
{
var diagnosticsOutput = actualResults.Any() ? FormatDiagnostics(analyzer, actualResults.ToArray()) : " NONE.";
string msg = GetMismatchNumberOfDiagnosticsMessage(expectedCount, actualCount, diagnosticsOutput);
return(VerifyDiagnosticAnalyzerResult.Fail(msg));
}
for (var i = 0; i < expectedResults.Length; i++)
{
var actual = actualResults.ElementAt(i);
var expected = expectedResults[i];
if (expected.Line == -1 && expected.Column == -1)
{
if (actual.Location != Location.None)
{
string msg = GetExpectedDiagnosticWithNoLocation(analyzer, actual);
return(VerifyDiagnosticAnalyzerResult.Fail(msg));
}
}
else
{
var locationResult = VerifyDiagnosticLocation(analyzer, actual, actual.Location, expected.Locations.First());
if (!locationResult.Success)
{
return(locationResult);
}
var additionalLocations = actual.AdditionalLocations.ToArray();
if (additionalLocations.Length != expected.Locations.Length - 1)
{
string msg = GetNotExpectedLocation(analyzer, actual, expected, additionalLocations);
return(VerifyDiagnosticAnalyzerResult.Fail(msg));
}
for (var j = 0; j < additionalLocations.Length; ++j)
{
locationResult = VerifyDiagnosticLocation(analyzer, actual, additionalLocations[j], expected.Locations[j + 1]);
if (!locationResult.Success)
{
return(locationResult);
}
}
}
if (actual.Id != expected.Id)
{
string msg = GetNoExpectedDiagnosticId(analyzer, actual, expected);
return(VerifyDiagnosticAnalyzerResult.Fail(msg));
}
if (actual.Severity != expected.Severity)
{
string msg = GetNotExpectedSeverityMessage(analyzer, actual, expected);
return(VerifyDiagnosticAnalyzerResult.Fail(msg));
}
if (actual.GetMessage() != expected.Message)
{
string msg = GetNotExcpectedMessage(analyzer, actual, expected);
return(VerifyDiagnosticAnalyzerResult.Fail(msg));
}
}
return(VerifyDiagnosticAnalyzerResult.Ok());
}