Major advancements

Added a couple of test to check for acurate behavior in certain conditions
Added the capability to check if a database was modified
New commandline arguments

src/Pacserver.Tests/checkForNewerStuffTest.cs

@@ -0,0 +1,60 @@
+using Pacserver.Utils;
+
+namespace Pacserver.Tests;
+
+public class checkForNewerStuffTest {
+    [Fact]
+    public void checkForNewerPackages_throwsExceptionIfNoFilesExist() {
+        // Arrange
+        PacserverUtils utils = new PacserverUtils();
+
+        // Act
+        Action act = () => utils.diff("/tmp/before_update.txt", "/tmp/after_update.txt");
+
+        // Assert
+        act.Should().Throw<FileNotFoundException>().WithMessage("Necessary files could not be found");
+    }
+
+    [Fact]
+    public void getEveryPackageNameAndVersionViaFolderName_createsFiles() {
+        // Arrange
+        PacserverUtils utils = new PacserverUtils();
+        utils.readPacmanConfig();
+
+        // Act
+        utils.getEveryPackageNameAndVersionViaFolderName("/tmp/before_update.txt");
+        utils.getEveryPackageNameAndVersionViaFolderName("/tmp/after_update.txt");
+
+        // Assert
+        File.Exists("/tmp/before_update.txt").Should().BeTrue();
+        File.Exists("/tmp/after_update.txt").Should().BeTrue();
+    }
+
+    [Fact]
+    public void packageNamesAndVersion_notEmpty() {
+        // Arrange
+        PacserverUtils utils = new PacserverUtils();
+        utils.readPacmanConfig();
+        utils.getEveryPackageNameAndVersionViaFolderName("/tmp/before_update.txt");
+
+        // Act
+        List<String> packageList = utils.packageNamesAndVersion;
+
+        // Assert
+        packageList.Should().NotBeNullOrEmpty();
+    }
+
+    [Fact]
+    public void getEveryPackageNameAndVersionViaFolderName_throwsExceptionIfListIsEmpty() {
+        // Arrange
+        PacserverUtils utils = new PacserverUtils();
+        Directory.CreateDirectory("/tmp/local");
+        utils.pacmanDatabaseDirectory = "/tmp/";
+
+        // Act
+        Action act = () => utils.getEveryPackageNameAndVersionViaFolderName("/tmp/before_update.txt");
+
+        // Assert
+        act.Should().Throw<Exception>().WithMessage("How did you execute this without any packages?");
+    }
+}