Add tests for checking if necessary values are set

Author: nihas101

src/main/java/de/nihas101/imageToPdfConverter/gui/controller/MainWindowController.java

@@ -165,13 +165,17 @@ public void chooseDirectory(ActionEvent actionEvent) {
             givenDirectory = createDirectoryChooser(mainWindow.imageToPdfOptions.getIteratorOptions())
                     .showDialog(directoryButton.getScene().getWindow());
 
-        if (givenDirectory != null) {
+        setupChosenDirectory(givenDirectory);
+
+        actionEvent.consume();
+    }
+
+    public void setupChosenDirectory(File directory) {
+        if (directory != null) {
             buildProgressBar.setProgress(0);
-            mainWindow.chosenDirectory = givenDirectory;
+            mainWindow.chosenDirectory = directory;
             startSetupIteratorThread();
         }
-
-        actionEvent.consume();
     }
 
     private boolean userWantsAZipFile() {
@@ -350,7 +354,7 @@ private void startPdfBuilderThread(PdfBuilder pdfBuilder) {
     /**
      * @return True if a all necessary values for building the PDF are set, false otherwise
      */
-    private boolean valuesSetForBuilding() {
+    public boolean valuesSetForBuilding() {
         if (mainWindow.getDirectoryIterator() == null) {
             notifyUser("Please choose a directory", RED);
             return false;

src/test/java/de/nihas101/imageToPdfConverter/gui/controller/MainWindowTest.kt

@@ -110,4 +110,29 @@ class MainWindowTest : ApplicationTest() {
     fun clearAllNoSetup() {
         clickOn("#clearAllButton")
     }
+
+    @Test
+    fun setupDirectory() {
+        mainWindowController!!.setupChosenDirectory(File("src/test/resources/images"))
+
+        assertEquals(true, mainWindow!!.chosenDirectory.exists())
+        assertEquals(true, mainWindow!!.chosenDirectory.isDirectory)
+    }
+
+    @Test
+    fun valuesSetFalse() {
+        assertEquals(false, mainWindowController!!.valuesSetForBuilding())
+    }
+
+    @Test
+    fun valuesSetTrue() {
+        setupDirectoryIterator("src/test/resources/images")
+        assertEquals(true, mainWindowController!!.valuesSetForBuilding())
+    }
+
+    @Test
+    fun valuesSetNoFiles() {
+        setupDirectoryIterator("src/test/resources/images/doesntExist")
+        assertEquals(false, mainWindowController!!.valuesSetForBuilding())
+    }
 }