105 lines
3.7 KiB
C#
105 lines
3.7 KiB
C#
using EpsonPrintService;
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using Inspectron.Epson;
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using Inspectron.Epson.PrintServer.Telemetry;
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namespace Inspectron.Epson.Tests.Telemetry;
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public class InsinTelemetryDiscoveredPrintersReceiverTests
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{
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private sealed class RecordingTelemetry : IInsinTelemetry
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{
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public List<(string Kind, string Message)> Events { get; } = new();
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public void Emit(string kind, string message) => Events.Add((kind, message));
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}
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private sealed class CountingInner : IDiscoveredPrintersReceiver
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{
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public int Calls;
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public Task OnPrintersDiscoveredAsync(IReadOnlyList<DiscoveredPrinter> printers)
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{
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Calls++;
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return Task.CompletedTask;
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}
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}
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private static DiscoveredPrinter Printer(string ip, string model = "TM-T30III") =>
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new() { IPAddress = ip, ModelName = model };
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[Fact]
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public async Task First_sighting_emits_discovered_and_online()
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{
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var telemetry = new RecordingTelemetry();
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var inner = new CountingInner();
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var sut = new InsinTelemetryDiscoveredPrintersReceiver(inner, telemetry);
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await sut.OnPrintersDiscoveredAsync(new[] { Printer("192.168.1.10") });
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Assert.Equal(1, inner.Calls);
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Assert.Collection(telemetry.Events,
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e => Assert.Equal("printer.discovered", e.Kind),
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e => Assert.Equal("printer.online", e.Kind));
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Assert.Contains("printer=192.168.1.10", telemetry.Events[0].Message);
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Assert.Contains("model=TM-T30III", telemetry.Events[0].Message);
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}
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[Fact]
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public async Task Repeat_sighting_emits_nothing()
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{
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var telemetry = new RecordingTelemetry();
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var sut = new InsinTelemetryDiscoveredPrintersReceiver(new CountingInner(), telemetry);
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await sut.OnPrintersDiscoveredAsync(new[] { Printer("192.168.1.10") });
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telemetry.Events.Clear();
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await sut.OnPrintersDiscoveredAsync(new[] { Printer("192.168.1.10") });
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Assert.Empty(telemetry.Events);
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}
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[Fact]
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public async Task Disappearance_emits_offline()
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{
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var telemetry = new RecordingTelemetry();
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var sut = new InsinTelemetryDiscoveredPrintersReceiver(new CountingInner(), telemetry);
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await sut.OnPrintersDiscoveredAsync(new[] { Printer("192.168.1.10") });
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telemetry.Events.Clear();
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await sut.OnPrintersDiscoveredAsync(Array.Empty<DiscoveredPrinter>());
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Assert.Single(telemetry.Events);
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Assert.Equal("printer.offline", telemetry.Events[0].Kind);
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Assert.Equal("printer=192.168.1.10", telemetry.Events[0].Message);
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}
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[Fact]
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public async Task Reappearance_emits_online_only_not_discovered()
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{
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var telemetry = new RecordingTelemetry();
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var sut = new InsinTelemetryDiscoveredPrintersReceiver(new CountingInner(), telemetry);
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await sut.OnPrintersDiscoveredAsync(new[] { Printer("192.168.1.10") });
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await sut.OnPrintersDiscoveredAsync(Array.Empty<DiscoveredPrinter>());
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telemetry.Events.Clear();
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await sut.OnPrintersDiscoveredAsync(new[] { Printer("192.168.1.10") });
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Assert.Single(telemetry.Events);
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Assert.Equal("printer.online", telemetry.Events[0].Kind);
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}
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[Fact]
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public async Task Telemetry_failures_do_not_break_inner()
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{
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var telemetry = new ThrowingTelemetry();
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var inner = new CountingInner();
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var sut = new InsinTelemetryDiscoveredPrintersReceiver(inner, telemetry);
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await sut.OnPrintersDiscoveredAsync(new[] { Printer("192.168.1.10") });
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Assert.Equal(1, inner.Calls);
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}
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private sealed class ThrowingTelemetry : IInsinTelemetry
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{
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public void Emit(string kind, string message) => throw new InvalidOperationException("boom");
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}
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}
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