public async Task HeartsBeating_AllReturnFalse_IfInternalException()
{
var heartbeat = new ApiHeartbeat(
this._exchangeRateApi,
this._marketApi,
this._ruleApi,
this._enrichmentApi,
this._logger);
A.CallTo(() => this._exchangeRateApi.HeartBeatingAsync(A <CancellationToken> .Ignored))
.Throws <ArgumentNullException>();
A.CallTo(() => this._marketApi.HeartBeatingAsync(A <CancellationToken> .Ignored)).Returns(Task.FromResult(true));
A.CallTo(() => this._ruleApi.HeartBeatingAsync(A <CancellationToken> .Ignored)).Returns(Task.FromResult(true));
var result = await heartbeat.HeartsBeating();
Assert.AreEqual(result, false);
}