test(app): add docker and main window view model tests

tests/Vantage.App.Tests/ViewModelBindingTests.cs

@@ -0,0 +1,62 @@
+using Vantage.App.Tests.Fakes;
+using Vantage.App.ViewModels;
+using Vantage.Core.Models;
+using Xunit;
+
+namespace Vantage.App.Tests;
+
+public class ViewModelBindingTests
+{
+    [Fact]
+    public void HostViewModel_ApplyMetricsUpdatesTextsAndHistory()
+    {
+        var host = new HostViewModel(new HostConfig { Name = "node", Address = "10.0.0.5", Username = "root", Port = 22 }, historyLength: 10);
+
+        host.ApplyMetrics(new HostMetrics
+        {
+            CpuUsagePercent = 42.5,
+            MemoryUsedBytes = 4L * 1024 * 1024 * 1024,
+            MemoryTotalBytes = 8L * 1024 * 1024 * 1024,
+            DiskUsedBytes = 50L * 1024 * 1024 * 1024,
+            DiskTotalBytes = 100L * 1024 * 1024 * 1024,
+            Load1 = 0.8,
+            Load5 = 0.6,
+            Load15 = 0.4,
+            Uptime = TimeSpan.FromHours(50)
+        });
+
+        Assert.Equal(42.5, host.CpuUsagePercent);
+        Assert.Equal(50.0, host.MemoryUsedPercent);
+        Assert.Single(host.CpuPoints);
+        Assert.Equal("4.0 GiB / 8.0 GiB", host.MemoryText);
+        Assert.True(host.IsOnline);
+        Assert.Equal("node", host.Name);
+        Assert.Equal("root@10.0.0.5:22", host.Endpoint);
+    }
+
+    [Fact]
+    public void HostViewModel_ApplyErrorMarksOffline()
+    {
+        var host = new HostViewModel(new HostConfig { Name = "node" }, historyLength: 10);
+
+        host.ApplyError("connection refused");
+
+        Assert.False(host.IsOnline);
+        Assert.Equal("connection refused", host.LastError);
+        Assert.Equal("Unreachable", host.StatusText);
+    }
+
+    [Fact]
+    public async Task HealthCheckViewModel_RunAppliesResult()
+    {
+        var config = new HealthCheckConfig { Name = "web", Kind = HealthKind.Http, Target = "https://x" };
+        var checker = new FakeHealthChecker(HealthCheckResult.Up(12.4, "HTTP 200 OK"));
+        var viewModel = new HealthCheckViewModel(config, checker);
+
+        await viewModel.RunCommand.ExecuteAsync(null);
+
+        Assert.Equal(HealthStatus.Up, viewModel.Status);
+        Assert.StartsWith("Up", viewModel.StatusText);
+        Assert.Equal("12 ms", viewModel.LatencyText);
+    }
+}