Resolve "Create tests for write to file"

Closes #40 (closed)

src/main/java/edu/ntnu/stud/Model/FileHandler/FileHandling.java

@@ -18,7 +18,6 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
 
-
 /*
  * Class for handling configuration file for chaos game.
  *
@@ -118,7 +117,7 @@ public class FileHandling {
 
     Complex point = new Complex(doubles.get(0), doubles.get(1));
     int sign = 1;
-    //int sign = doubles.get(2).intValue();
+    // int sign = doubles.get(2).intValue();
 
     return new JuliaTransform(point, sign);
   }
@@ -191,6 +190,18 @@ public class FileHandling {
     }
   }
 
+  /**
+   * Deletes a transform file.
+   *
+   * @param filename The name of the file to delete.
+   * @throws Exception if the file cannot be deleted.
+   */
+  public static void deleteFile(String filename) throws Exception {
+    if (!new java.io.File(filename).delete()) {
+      throw new Exception("File could not be deleted");
+    }
+  }
+
   /**
    * Converts a vector to a string.
    *
@@ -208,17 +219,22 @@ public class FileHandling {
    * @return The affine transform as a string.
    */
   private static String affineTransformToString(AffineTransform2D transform) {
-    return transform.getMatrix().getMatrix()[0]
-        + ", "
-        + transform.getMatrix().getMatrix()[1]
-        + ", "
-        + transform.getMatrix().getMatrix()[2]
-        + ", "
-        + transform.getMatrix().getMatrix()[3]
-        + ", "
-        + transform.getVector().getVector()[0]
-        + ", "
-        + transform.getVector().getVector()[1];
+    StringBuilder matrixString = new StringBuilder();
+
+    for (int i = 0; i < transform.getMatrix().getMatrix().length; i++) {
+      for (int j = 0; j < transform.getMatrix().getMatrix().length; j++) {
+        matrixString.append(transform.getMatrix().getMatrix()[i][j]).append(", ");
+      }
+    }
+
+    for (double vectorComponent : transform.getVector().getVector()) {
+      matrixString.append(vectorComponent).append(", ");
+    }
+
+    // remove last comma and space
+    matrixString.delete(matrixString.length() - 2, matrixString.length());
+
+    return matrixString.toString();
   }
 
   /**