117 lines
3.9 KiB
C#
117 lines
3.9 KiB
C#
using KronaStaffTerminal.Models;
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using KronaStaffTerminal.Services;
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using KronaStaffTerminal.Tests.Mocks;
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using Xunit;
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namespace KronaStaffTerminal.Tests;
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public class ScannerRecoveryTests
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{
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[Fact]
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public void Scanner_SimulatesUsbDisconnectAndFiresConnectionLost()
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{
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using var scanner = new MockFingerprintScanner();
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scanner.Connect(0, Array.Empty<(int, string)>());
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Assert.True(scanner.IsConnected);
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Assert.Equal(ScannerState.Connected, scanner.State);
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var connectionLostFired = false;
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ScannerState? reportedState = null;
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scanner.ConnectionLost += () => connectionLostFired = true;
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scanner.StateChanged += (state, _) => reportedState = state;
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// Simulate physical USB drop
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scanner.SimulateDisconnect();
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Assert.False(scanner.IsConnected);
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Assert.Equal(ScannerState.Disconnected, scanner.State);
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Assert.True(connectionLostFired);
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Assert.Equal(ScannerState.Disconnected, reportedState);
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}
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[Fact]
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public void Scanner_SimulatesUsbReconnectAndRestoresReadyState()
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{
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using var scanner = new MockFingerprintScanner();
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scanner.Connect(0, Array.Empty<(int, string)>());
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scanner.SimulateDisconnect();
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Assert.Equal(ScannerState.Disconnected, scanner.State);
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ScannerState? reportedState = null;
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scanner.StateChanged += (state, _) => reportedState = state;
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// Simulate USB re-plug
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scanner.SimulateReconnect();
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Assert.True(scanner.IsConnected);
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Assert.Equal(ScannerState.Connected, scanner.State);
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Assert.Equal(ScannerState.Connected, reportedState);
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}
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[Fact]
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public void AdminPinVerification_OperatesNormallyWhenScannerIsDisconnected()
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{
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using var scanner = new MockFingerprintScanner();
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scanner.SimulateDisconnect();
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Assert.Equal(ScannerState.Disconnected, scanner.State);
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// Verify that AdminPinService functions 100% independently of hardware scanner state
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var (salt, hash, iterations) = AdminPinService.Hash("5555");
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var settings = new TerminalSettings
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{
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AdminPinSalt = salt,
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AdminPinHash = hash,
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AdminPinIterations = iterations
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};
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var now = DateTimeOffset.UtcNow;
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var allowed = AdminPinService.VerifyAndRecord(
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"5555", settings, now, out var error, out var rehashNeeded);
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Assert.True(allowed);
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Assert.Null(error);
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Assert.False(rehashNeeded);
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}
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[Fact]
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public async Task Scanner_AutoReconnectLogic_CallsConnectSuccessfully()
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{
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using var scanner = new MockFingerprintScanner();
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scanner.Connect(0, Array.Empty<(int, string)>());
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Assert.Equal(1, scanner.ConnectCallCount);
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var reconnectTcs = new TaskCompletionSource();
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scanner.ConnectionLost += async () =>
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{
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// Simulate typical application retry loop
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int retries = 0;
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while (retries < 5)
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{
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await Task.Delay(10, TestContext.Current.CancellationToken);
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try
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{
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scanner.Connect(0, Array.Empty<(int, string)>());
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if (scanner.IsConnected)
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{
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reconnectTcs.TrySetResult();
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return;
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}
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}
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catch { }
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retries++;
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}
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reconnectTcs.TrySetException(new Exception("Failed to reconnect"));
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};
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scanner.SimulateDisconnect();
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// Emulate the hardware coming back after a short delay
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await Task.Delay(20, TestContext.Current.CancellationToken);
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scanner.AddVirtualDevice(0, "SLK20R", "SERIAL"); // ensure device is discoverable if it was cleared
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await reconnectTcs.Task;
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Assert.True(scanner.ConnectCallCount > 1);
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Assert.Equal(ScannerState.Connected, scanner.State);
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}
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}
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