protected override void CreateCollectionFixture(Type fixtureType)
{
var ctors = fixtureType.GetTypeInfo().DeclaredConstructors.Where(ci => !ci.IsStatic && ci.IsPublic).ToList();
if (ctors.Count != 1)
{
Aggregator.Add(new TestClassException("Collection fixture type '" + fixtureType.FullName + "' may only define a single public constructor."));
}
else
{
var ctor = ctors[0];
var missingParameters = new List <ParameterInfo>();
var ctorArgs = ctor.GetParameters().Select(p =>
{
if (!CollectionFixtureMappings.TryGetValue(p.ParameterType, out var arg))
{
missingParameters.Add(p);
}
return(arg);
}).ToArray();
if (missingParameters.Count > 0)
{
var parameters = string.Join(", ", missingParameters.Select(p => $"{p.ParameterType.Name} {p.Name}"));
Aggregator.Add(new TestClassException(
$"Class fixture type '{fixtureType.FullName}' had one or more unresolved constructor arguments: {parameters}"
));
}
else
{
Aggregator.Run(() => CollectionFixtureMappings[fixtureType] = ctor.Invoke(ctorArgs));
}
}
}
protected override Task BeforeTestCollectionFinishedAsync()
{
// We need to remove the assembly fixtures so they won't get disposed.
foreach (var mapping in _assemblyFixtureMappings)
{
CollectionFixtureMappings.Remove(mapping.Key);
}
return(base.BeforeTestCollectionFinishedAsync());
}
protected override async Task AfterTestCollectionStartingAsync()
{
await base.AfterTestCollectionStartingAsync();
foreach (var mapping in _assemblyFixtureMappings)
{
CollectionFixtureMappings.Add(mapping.Key, mapping.Value);
}
}
protected override async Task AfterTestCollectionStartingAsync()
{
await base.AfterTestCollectionStartingAsync();
// note: We pass the assembly fixtures into the runner as ICollectionFixture<> - this seems to work OK without any
// drawbacks. It's reasonable that we could add IAssemblyFixture<> and related plumbing if it ever became required.
//
// The reason for assembly fixture is when we want to start/stop something as the project scope - tests can only be
// in one test collection at a time.
foreach (var mapping in _assemblyFixtureMappings)
{
CollectionFixtureMappings.Add(mapping.Key, mapping.Value);
}
}