public AggregateTraceSourceSpec() { this.first = new Mock<ITraceSource> { DefaultValue = DefaultValue.Mock }; this.second = new Mock<ITraceSource> { DefaultValue = DefaultValue.Mock }; this.first.SetupAllProperties(); this.second.SetupAllProperties(); this.aggregate = new AggregateTraceSource("Tracer", new[] { this.first.Object, this.second.Object }); }