Tests: Add UnitTests folder

Tests/UnitTests/DocumentTests/CreditNoteTest.cs

@@ -0,0 +1,44 @@
+using Elwig.Documents;
+using Elwig.Helpers;
+using Elwig.Models.Dtos;
+using Microsoft.EntityFrameworkCore;
+
+namespace Tests.UnitTests.DocumentTests {
+    [TestFixture]
+    public class CreditNoteTest {
+
+        [Test]
+        public async Task Test_01_VirtualCreditNote() {
+            using var ctx = new AppDbContext();
+            var m = await ctx.Members.FindAsync(101);
+            var p = await ctx.MemberPayments.Where(p => p.Year == 2020 && p.AvNr == 1).SingleAsync();
+            var data = await CreditNoteDeliveryData.ForPaymentVariant(ctx.CreditNoteDeliveryRows, ctx.PaymentVariants, 2020, 1);
+            using var doc = new CreditNote(ctx, p, data[m!.MgNr], false, false, false, false,
+                ctx.GetMemberUnderDelivery(2020, m!.MgNr).GetAwaiter().GetResult());
+            var text = await Utils.GeneratePdfText(doc);
+            Assert.Multiple(() => {
+                Assert.That(text, Contains.Substring("""
+                    MUSTERMANN Max
+                    Winzerstraße 1
+                    2223 Hohenruppersdorf
+                    """));
+                Assert.That(text, Contains.Substring("0123463"));  // Betriebsnummer
+                Assert.That(text, Contains.Substring("pauschaliert"));
+                Assert.That(text, Contains.Substring($"Wolkersdorf, am {Elwig.Helpers.Utils.Today:dd.MM.yyyy}"));
+                Assert.That(text, Contains.Substring("Traubengutschrift Max Mustermann – Probevariante"));
+                Assert.That(text, Contains.Substring("AT81 1234 5678 9012 3457"));
+                Assert.That(text, Contains.Substring("""
+                    20201001X001 1 Grüner Veltliner 73 15,0 ungeb.: 3 219 0,5000 - - 1 609,50
+                    20201001X003 1 Grüner Veltliner abgew. 75 15,4 ungeb.: 2 561 - -
+                    20201001X003 2 Grüner Veltliner Kabinett / abgew.
+                    87 17,6 ungeb.: 3 129 - -
+                    20201001X003 3 Grüner Veltliner abgew. 79 16,1 ungeb.: 1 280 - -
+                    20201001X005 1 Welschriesling 84 17,0 ungeb.: 3 192 - -
+                    20201001X005 2 Welschriesling 84 17,1 ungeb.: 2 190 - -
+                    """));
+                Assert.That(text, Contains.Substring("Gesamtbetrag: € 1 000,00"));
+                Assert.That(text, Contains.Substring("Auszahlungsbetrag: € 1 000,00"));
+            });
+        }
+    }
+}