// This program tests stage 3 of the LetterInventory class. 
// The add and subtract methods

import java.util.*;
import java.io.*;

public class Test3 {
   public static String[] LETTERS1 = new String[] {"aaggghhhh", "hello", "Four score and seven years ago", "Mitt Romney", "Cellar Door", "one day at a time"};
   public static String[] LETTERS2 = new String[] {"ggg", "", "See your greed!", "inert", "Old Car Lore", "a stich in time"};
   public static final int GETS_PER_LINE = 5;
   
   public static void main(String[] args) {     
      for (int i = 0; i < LETTERS1.length; i++) {
         String s1 = LETTERS1[i];
         String s2 = LETTERS2[i];
         System.out.println("Testing these two strings:");
         System.out.println("    i1: \"" + s1 + "\"");
         System.out.println("    i2: \"" + s2 + "\"");
         System.out.println("constructing i1 and i2");
         System.out.println();
         LetterInventory i1 = null;
         LetterInventory i2 = null;
         try {
            i1 = new LetterInventory(s1);
            i2 = new LetterInventory(s2);
         } catch (Exception e) {
            System.out.println("failed");
            System.out.println("    threw exception: " + e);
            int line = e.getStackTrace()[0].getLineNumber();
            System.out.println("    in LetterInventory line#" + line);
            System.exit(1);
         }
      
         System.out.println("testing i1.add(i2)");
         System.out.println("\ti1: \"" + s1 + "\"");
         System.out.println("\ti2: \"" + s2 + "\"");
         System.out.println("\tli = i1.add(i2)");
         try {
            LetterInventory test = i1.add(i2);
            check(test);
         } catch (Exception e) {
            System.out.println("add failed");
            System.out.println("    threw exception: " + e);
            int line = e.getStackTrace()[0].getLineNumber();
            System.out.println("    in LetterInventory line#" + line);
            System.exit(1);
         }
      
         System.out.println("testing i2.add(i1)");
         System.out.println("\ti1: \"" + s1 + "\"");
         System.out.println("\ti2: \"" + s2 + "\"");
         System.out.println("\tli = i2.add(i1)");
         try {
            LetterInventory test = i2.add(i1);
            check(test);
         } catch (Exception e) {
            System.out.println("add failed");
            System.out.println("    threw exception: " + e);
            int line = e.getStackTrace()[0].getLineNumber();
            System.out.println("    in LetterInventory line#" + line);
            System.exit(1);
         }
      
         System.out.println("testing i1.subtract(i2)");
         System.out.println("\ti1: \"" + s1 + "\"");
         System.out.println("\ti2: \"" + s2 + "\"");
         System.out.println("\tli = i1.subtract(i2)");
         try {
            LetterInventory test = i1.subtract(i2);
            check(test);
         } catch (Exception e) {
            System.out.println("subtract failed");
            System.out.println("    threw exception: " + e);
            int line = e.getStackTrace()[0].getLineNumber();
            System.out.println("    in LetterInventory line#" + line);
            System.exit(1);
         }
      
         System.out.println("testing i2.subtract(i1)");
         System.out.println("\ti1: \"" + s1 + "\"");
         System.out.println("\ti2: \"" + s2 + "\"");
         System.out.println("\tli = i2.subtract(i1)");
         try {
            LetterInventory test = i2.subtract(i1);
            check(test);
         } catch (Exception e) {
            System.out.println("subtract failed");
            System.out.println("    threw exception: " + e);
            int line = e.getStackTrace()[0].getLineNumber();
            System.out.println("    in LetterInventory line#" + line);
            System.exit(1);
         }
         System.out.println();
      }
   }

   // post: prints out the provided letter inventories
   // toString, size, isEmpty, and get calls
   public static void check(LetterInventory tester) {
      if (tester == null) {
         System.out.println("\tli = null");
      } else {
         testToString(tester);
         testSize(tester);
         testIsEmpty(tester);
         testGet(tester);
         System.out.println("");
         System.out.println("");
      }
   
   }

   // post: prints out the result of calling .toString()
   public static void testToString(LetterInventory tester) {
      String test = "";
      try {
         test = tester.toString();
      } catch (Exception e) {
         System.out.println("toString failed");
         System.out.println("    threw exception: " + e);
         int line = e.getStackTrace()[0].getLineNumber();
         System.out.println("    in LetterInventory line#" + line);
         System.exit(1);
      }
      
      System.out.println("\tli.toString() = " + test);
   }

   // post: prints to the screen the result of calling 
   // the provided LetterInventorie's .size() method
   public static void testSize(LetterInventory tester) {
      int test = 0;
      try {
         test = tester.size();
      } catch (Exception e) {
         System.out.println("size failed");
         System.out.println("    threw exception: " + e);
         int line = e.getStackTrace()[0].getLineNumber();
         System.out.println("    in LetterInventory line#" + line);
         System.exit(1);
      }
      
      System.out.println("\tli.size()=" + test);
   }

   // post: prints to the screen the result of calling
   // the provided LetterInventory's .isEmpty() method
   public static void testIsEmpty(LetterInventory tester) {
      boolean test = false;
      try {
         test = tester.isEmpty();
      } catch (Exception e) {
         System.out.println("isEmpty failed");
         System.out.println("    threw exception: " + e);
         int line = e.getStackTrace()[0].getLineNumber();
         System.out.println("    in LetterInventory line#" + line);
         System.exit(1);
      }
      System.out.println("\tli.isEmpty()=" + test);
   }

   // post: prints out the result of calling the provided
   // LetterInventory's .get methods
   public static void testGet(LetterInventory tester) {
      System.out.print("\t");
      for (char ch = 'a'; ch <= 'z'; ch++) {
         // int correct = input.nextInt();
         int test = 0;
         try {
            test = tester.get(ch);
         } catch (Exception e) {
            System.out.println("get failed for '" + ch + "'");
            System.out.println("    threw exception: " + e);
            int line = e.getStackTrace()[0].getLineNumber();
            System.out.println("    in LetterInventory line#" + line);
            System.exit(1);
         }
         
         if ((ch - 'a') % GETS_PER_LINE == 0 && ch != 'a') {
            System.out.println("");
            System.out.print("\t");
         }
         System.out.print("li.get('" + ch + "')=" + test + " ");
      }
   }
}