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

// Program to test solutions to problem #9 on the cse143x midterm, fall 2012.
// Fill in your solution to printCompact, then compile and run the program.

import java.util.*;

public class Test9 {

    public static void printCompact(String s) {
        // fill in your solution here
        // you can also rename the parameter above
    }

    // this is the sample solution
    public static void printCompact2(String s) {
        boolean inWord = false;
        boolean firstWord = true;
        for (int i = 0; i < s.length(); i++) {
            char next = s.charAt(i);
            if (next == ' ') {
                inWord = false;
            } else {  // next != ' '
                if (!inWord) {
                    inWord = true;
                    if (firstWord) {
                        firstWord = false;
                    } else {
                        System.out.print(' ');
                    }
                }
                System.out.print(next);
            }
        }
        System.out.println();
    }

    public static final String END_TEST_TEXT = "end test";
    public static final String TEMP_FILE_NAME = 
        "CSE143_Test2_temporary_file.txt";

    public static void main(String[] args) throws FileNotFoundException {
        // create an output file with correct answers and student answers
        File temp = new File(TEMP_FILE_NAME);
        PrintStream out = new PrintStream(temp);
        PrintStream old = System.out;
        System.setOut(out);
        String[] data = {"this is fun", " four score and seven",
                         "four score and seven ", " four score and seven ",
                         "  this    string    has    lots    of     spaces   ",
                         "hello", " how", "are ", " you ", "", " ", "  ", 
                         "   ", "    ", "     "};
        for (String s : data) {
            System.out.println("\"" + s + "\"");
            printCompact2(s);
            try {
                printCompact(s);
                System.out.println();
            } catch (Exception e) {
                StackTraceElement[] frames = e.getStackTrace();
                int line = frames[frames.length - 2].getLineNumber();
                System.out.println("\nthrew " + e + " at line #" + line);
            }
            System.out.println(END_TEST_TEXT);
        }
        System.out.close();

        // go through the file to compare pairs of answers
        int fail = 0;
        System.setOut(old);
        Scanner input = new Scanner(temp);
        while (input.hasNextLine()) {
            String s = input.nextLine();
            String correct = input.nextLine() + "\\n";
            String yours = null;
            String line = input.nextLine();
            while (!line.equals(END_TEST_TEXT)) {
                if (yours == null) {
                    yours = line;
                } else {
                    yours += line + "\\n";
                }
                line = input.nextLine();
            }
            System.out.println("Testing with s = " + s);
            System.out.println("Correct output: \"" + correct + "\"");
            if (correct.equals(yours)) {
                System.out.println("passed");
            } else {
                System.out.println("Your output: \"" + yours + "\"");
                System.out.println("failed");
                fail++;
            }
            System.out.println();
        }
        if (fail == 0) {
            System.out.println("all tests passed");
        } else {
            System.out.println("failed " + fail + " tests");
        }

        // remove the temporary file
        input.close();
        temp.delete();
    }
}