// Program to test solutions to problem #8 on the cse142 midterm, winter 2019.
// Fill in your solution to printStripped, then compile and run the program.

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

public class Test8 {
    public static void printStripped(String s) {
        // fill in your solution here
        // you can also rename the parameter above
    }

    // this is the sample solution
    public static void printStripped2(String s) {
        boolean inComment = false;
        for (int i = 0; i < s.length(); i++) {
            char next = s.charAt(i);
            if (next == '<') {
                inComment = true;
            } else if (inComment && next == '>') {
                inComment = false;
            } else if (!inComment) {
                System.out.print(next);
            }
        }
        System.out.println();
    }

    private static int count, failCount;

    public static final String END_TEST_TEXT = "end test";
    public static final String TEMP_FILE_NAME = 
        "CSE142_Test8_temporary_file.txt";

    public static void main(String[] args) throws FileNotFoundException {
        int fail = 0;

        // 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 plain text",
             "this has a normal comment <right here> to be removed",
             "this has multiple less-than in a comment <<<<<see?>",
             "this > has <comment>greater than outside a comment >>",
             "<hi>this has <foo> multiple <bar> comments<baz><>.",
             "<a>", "<a><b>", "<a><b><c>", "<a><b><c><d>", "1<a>2<b>3<c>4",
             "<aa>", "<aa><bb>", "<aa><bb><cc>", "1<aa>2<bb>3<cc>4",
             "<hi there> ... <what <  is this?> > > here?",
             "this is <a strange> >> <<example of <<> > <stuff !>"};

        for (String s : data) {
            System.out.println(s);
            try {
                printStripped2(s);
            } catch (Exception e) {
                System.out.println("threw " + e.getClass());
            }
            try {
                printStripped(s);
                System.out.println();
            } catch (Exception e) {
                System.out.println("threw " + e.getClass());
            }
            System.out.println(END_TEST_TEXT);
        }
        System.out.close();

        // go through the file to compare pairs of answers
        System.setOut(old);
        Scanner input = new Scanner(temp);
        while (input.hasNextLine()) {
            String s = input.nextLine();
            String correct = input.nextLine() + "\\n";
            String yours = "";
            for (;;) {
                String line = input.nextLine();
                if (line.equals(END_TEST_TEXT))
                    break;
                yours += line + "\\n";
            }
            yours = yours.substring(0, yours.length() - 2);
            System.out.println("Testing \"" + s + "\"");
            System.out.println("Correct output:");
            System.out.println(correct);
            if (correct.equals(yours)) {
                System.out.println("passed");
            } else {
                fail++;
                System.out.println("Your output:");
                System.out.println(yours);
                System.out.println("failed");
            }
            System.out.println();
        }

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

        if (fail == 0) {
            System.out.println("passed all tests");
        } else {
            System.out.println("failed " + fail + " of " + data.length +
                               " tests");
        }
    }
}