test(focas): integration test for cnc_getfigure position scaling via focas-mock

tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.FOCAS.IntegrationTests/Series/WireBackendCoverageTests.cs

@@ -237,6 +237,73 @@ public sealed class WireBackendCoverageTests
         }
     }
 
+    /// <summary>
+    ///     Verifies that per-axis position figures fetched via <c>cnc_getfigure</c> (wire command
+    ///     0x00D3) scale the published <c>AbsolutePosition</c>, and that the auto figure wins over
+    ///     the configured <c>PositionDecimalPlaces</c> fallback knob.
+    ///     Seed: X axis absolute = 12345, figure = 3  →  published value = 12.345 (÷ 10^3).
+    ///     Config knob = 1  →  fallback would give 1234.5.  12.345 uniquely proves the wire path.
+    /// </summary>
+    [Fact]
+    public async Task Position_figures_scale_axis_via_wire_backend()
+    {
+        if (_fx.SkipReason is not null) Assert.Skip(_fx.SkipReason);
+        var ct = TestContext.Current.CancellationToken;
+
+        await _fx.LoadProfileAsync("FWLIB64", ct);
+        await _fx.PatchStateAsync(new
+        {
+            axis_names = new[] { "X" },
+            dynamic = new
+            {
+                alarm = 0, prgnum = 1, prgmnum = 1, seqnum = 1,
+                actf = 0, acts = 0,
+                axes = new
+                {
+                    X = new { absolute = 12345, machine = 12345, relative = 0, distance = 0 },
+                },
+            },
+            // Per-axis decimal-place figures for cnc_getfigure (command 0x00D3).
+            // The mock's _wire_position_figures() reads state["position_figures"][axisName].
+            position_figures = new { X = 3 },
+        }, ct);
+
+        // PositionDecimalPlaces = 1 is intentionally different from the auto figure (3)
+        // so the assertion 12.345 uniquely proves the cnc_getfigure path won.
+        var driver = new FocasDriver(new FocasDriverOptions
+        {
+            Devices = [new FocasDeviceOptions(DeviceHost, PositionDecimalPlaces: 1)],
+            Tags = [],
+            Probe = new FocasProbeOptions { Enabled = false },
+            FixedTree = new FocasFixedTreeOptions
+            {
+                Enabled = true,
+                PollInterval = TimeSpan.FromMilliseconds(100),
+                ProgramPollInterval = TimeSpan.Zero,
+                TimerPollInterval = TimeSpan.Zero,
+            },
+        }, driverInstanceId: "wire-figures", clientFactory: new WireFocasClientFactory());
+
+        await using (driver)
+        {
+            await driver.InitializeAsync("{}", ct);
+
+            await WaitFor(() =>
+                driver.GetDeviceState(DeviceHost)?.LastFixedSnapshots
+                    .ContainsKey($"{DeviceHost}/Axes/X/AbsolutePosition") == true,
+                TimeSpan.FromSeconds(5));
+
+            var state = driver.GetDeviceState(DeviceHost);
+            state.ShouldNotBeNull();
+            var published = state.LastFixedSnapshots[$"{DeviceHost}/Axes/X/AbsolutePosition"];
+
+            // 12345 ÷ 10^3 = 12.345  →  auto figure (3) won.
+            // 12345 ÷ 10^1 = 1234.5  →  would mean config knob (1) was used instead.
+            // 12345 ÷ 10^0 = 12345.0 →  would mean no scaling at all.
+            published.ShouldBe(12.345, tolerance: 0.0001);
+        }
+    }
+
     private static async Task WaitFor(Func<bool> pred, TimeSpan timeout)
     {
         var deadline = DateTime.UtcNow + timeout;