Weighing: Add Gassner scale and update tests

Tests/WeighingTests/ScaleTestBadenL320.cs

@@ -0,0 +1,70 @@
+using Elwig.Helpers.Weighing;
+
+namespace Tests.WeighingTests {
+    [TestFixture]
+    public class ScaleTestBadenL320 {
+
+        private EventMockScale? Mock;
+        private AveryEventScale? Scale;
+
+        private static (string, bool) ScaleHandler(int weight, string? error, int identNr) {
+            var modes = error?.Split(';') ?? [];
+            var invalid = modes.Contains("invalid");
+            var unit = modes.Contains("unit");
+
+            if (invalid) {
+                return ("abcd\r\n", false);
+            }
+
+            bool incr = true;
+            return ($" {new DateTime(2020, 9, 28, 9, 8, 0):dd.MM.yy HH:mm} {identNr,4} {weight,9}{(unit ? "lb" : "kg")} \r\n", incr);
+        }
+
+        [OneTimeSetUp]
+        public void SetupScale() {
+            Mock = new EventMockScale(12345, ScaleHandler);
+            Scale = new("1", "L320", "tcp://127.0.0.1:12345");
+        }
+
+        [OneTimeTearDown]
+        public void TeardownScale() {
+            Mock?.Dispose();
+            Scale?.Dispose();
+        }
+
+        [SetUp]
+        public void ResetScale() {
+            Mock!.IdentNr = 0;
+            Mock!.Weight = 0;
+            Mock!.Error = null;
+        }
+
+        [Test]
+        public async Task Test_01_Normal() {
+            WeighingResult? res = null;
+            Scale!.WeighingEvent += (sender, evt) => {
+                res = evt.Result;
+            };
+
+            await Mock!.Weigh(2345);
+            await Task.Delay(100);
+            Assert.That(res, Is.Not.Null);
+            Assert.That(res, Is.EqualTo(new WeighingResult {
+                Weight = 2345, WeighingId = "1",
+                FullWeighingId = $"2020-09-28/1",
+                Date = new DateOnly(2020, 9, 28), Time = new TimeOnly(9, 8),
+            }));
+
+            await Mock!.Weigh(4215);
+            await Task.Delay(100);
+            Assert.That(res, Is.Not.Null);
+            Assert.That(res, Is.EqualTo(new WeighingResult {
+                Weight = 4215,
+                WeighingId = "2",
+                FullWeighingId = $"2020-09-28/2",
+                Date = new DateOnly(2020, 9, 28),
+                Time = new TimeOnly(9, 8),
+            }));
+        }
+    }
+}