/// <summary>
/// Annotates a type as being a test fixture conditional on a connection being available.
/// </summary>
/// <param name="target">The type where an <see cref="IDbConnection"/> instance can be retrieved.</param>
/// <param name="propertyName">The name of the property in <paramref name="target"/> where an <see cref="IDbConnection"/> instance can be retrieved.</param>
/// <param name="ignoreMessage">The message to display when a test has been skipped due a missing connection.</param>
public DatabaseTestFixtureAttribute(Type target, string propertyName, string ignoreMessage)
{
if (target == null || string.IsNullOrWhiteSpace(propertyName) || string.IsNullOrWhiteSpace(ignoreMessage))
{
return;
}
var propCache = TypeCache.GetOrAdd(target, new ConcurrentDictionary <string, MethodInfo?>());
var getMethod = propCache.GetOrAdd(propertyName, propName =>
{
var propInfo = target.GetProperty(propName, SearchFlags);
if (propInfo != null && (!IDbConnectionFactoryType.IsAssignableFrom(propInfo.PropertyType) || propInfo.GetGetMethod() == null))
{
propInfo = null;
}
return(propInfo?.GetGetMethod());
});
if (getMethod == null)
{
return;
}
if (ResultCache.TryGetValue(getMethod, out var cachedResult) && !cachedResult)
{
Ignore = ignoreMessage;
return;
}
IDbConnectionFactory factory;
try
{
var methodResult = getMethod.Invoke(null, Array.Empty <object>());
if (methodResult is null || !(methodResult is IDbConnectionFactory connFactory))
{
ResultCache.AddOrUpdate(getMethod, false, (_, __) => false);
Ignore = ignoreMessage;
return;
}
factory = connFactory;
}
catch
{
ResultCache.AddOrUpdate(getMethod, false, (_, __) => false);
Ignore = ignoreMessage;
return;
}
var hasConnection = false;
try
{
using var connection = factory.OpenConnection();
hasConnection = true;
}
catch
{
// ignore any connection failure
}
var isEnabled = ResultCache.AddOrUpdate(getMethod, hasConnection, (_, __) => hasConnection);
if (!isEnabled)
{
Ignore = ignoreMessage;
}
}