Tests: Add tests for documents

Tests/DocumentTests/DeliveryNoteTest.cs

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+using Elwig.Documents;
+using Elwig.Helpers;
+
+namespace Tests.DocumentTests {
+    [TestFixture]
+    public class DeliveryNoteTest {
+
+        private readonly AppDbContext Context = new();
+
+        [Test]
+        public async Task Test_01_OneDeliveryPart() {
+            var d = await Context.Deliveries.FindAsync(2020, 1);
+            using var doc = new DeliveryNote(d!, Context);
+            var text = await Utils.GeneratePdfText(doc);
+            Console.Write(text);
+            Assert.Multiple(() => {
+                Assert.That(text, Contains.Substring("""
+                MUSTERMANN Max
+                Winzerstraße 1
+                2223 Hohenruppersdorf
+                """));
+                Assert.That(text, Contains.Substring("1472583"));  // Betriebsnummer
+                Assert.That(text, Contains.Substring("pauschaliert"));
+                Assert.That(text, Contains.Substring($"Wolkersdorf, am {DateTime.Now:dd.MM.yyyy}"));
+                Assert.That(text, Contains.Substring("Traubenübernahmeschein Nr. 20201001X001"));
+                // TODO
+                Assert.That(text, Contains.Substring("Ich bin der Text, der auf einem Traubenübernahmeschein steht!"));
+            });
+        }
+    }
+}

Tests/DocumentTests/Setup.cs

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+using Elwig.Helpers;
+using System.Reflection;
+using Microsoft.Data.Sqlite;
+using Elwig.Helpers.Printing;
+
+namespace Tests.DocumentTests {
+    [SetUpFixture]
+    public class Setup {
+
+        private SqliteConnection? Connection;
+
+        [OneTimeSetUp]
+        public async Task SetupDatabase() {
+            Connection = await AppDbContext.ConnectAsync();
+            await AppDbContext.ExecuteEmbeddedScript(Connection, Assembly.GetExecutingAssembly(), "Tests.Resources.Sql.DocumentInsert.sql");
+        }
+
+        [OneTimeTearDown]
+        public async Task TeardownDatabase() {
+            if (Connection == null) return;
+            await AppDbContext.ExecuteEmbeddedScript(Connection, Assembly.GetExecutingAssembly(), "Tests.Resources.Sql.DocumentDelete.sql");
+            await Connection.DisposeAsync();
+            Connection = null;
+        }
+
+        [OneTimeSetUp]
+        public async Task SetupPrinting() {
+            await Html.Init();
+            await Pdf.Init();
+        }
+
+        [OneTimeTearDown]
+        public void TeardownPrinting() {
+            // no teardown needed yet
+        }
+    }
+}

Tests/DocumentTests/Utils.cs

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+using Elwig.Documents;
+using NReco.PdfRenderer;
+
+namespace Tests.DocumentTests {
+    public static class Utils {
+
+        private static readonly string FileName = Path.Combine(Path.GetTempPath(), "test_document.pdf");
+
+        public static async Task<string> GeneratePdfText(Document doc) {
+            await doc.Generate();
+            try {
+                doc.SaveTo(FileName);
+                var conv = new PdfToTextConverter { CustomArgs = "-raw " };
+                return conv.GenerateText(FileName);
+            } finally {
+                File.Delete(FileName);
+            }
+        }
+    }
+}