/* Grader for CS211 Assignment 4 -- enumerating tags and links*/
import java.io.*;
import java.net.*;
public class Main {
public static String fileName = "graded.txt"; // Output file name
// Modify for your computer
// The location of the 4 html testing files. Modify the path for your computer
public static String inputFile1 = "links1.html";
public static String inputFile2 = "links2.html";
public static String inputFile3 = "links3.html";
public static String inputFile4 = "links4.html";
public static PrintStream out= null; // The output file
public static URL url = null; // The url of the current html file
public static BufferedReader br = null; // The BufferedReader for the current html file
public static int numTags = 0; // A counter for the number of tags in a file
public static int numLinks = 0; // A counter for the number of links in a file
public static int pointsTE= 0; // points deducted automatically during TagEnumerationCheck
public static int pointsLE= 0; // points deducted automatically during LinkEnumerationCheck
public static void main(String args[]) throws IOException {
createOut(); // Initialize the output file (static variable out)
System.out.println("createout completed");
testTagEnumeration();
System.out.println("TagEnumeration testing complete");
out.println("Points deducted by automatic tester: " + pointsTE);
out.println("");
out.println("");
testLinkEnumeration();
System.out.println("LinkEnumeration testing complete");
out.println("Points deducted by automatic tester: " + pointsLE);
out.println("");
out.println("");
}
// Test class TagEnumeration, writing output to output file out
public static void testTagEnumeration() {
out.println("Checking TagEnumeration Automatically. Messages printed (with points deducted) " +
"if errors found.");
// Test an empty file
createIn1();
TagEnumeration te = null;
try {
te = new TagEnumeration(br);
} catch (Exception e) {messTE(2, "TagEnumeration constructor did not initialize correctly"); }
// Test constructor
if (te == null) {messTE(2, "TagEnumeration constructor did not initialize correctly"); }
// Test the case where there are no tags
try {
if (te.hasMoreElements()) {
messTE(2, "hasMoreElements() returned true on a file with no tags");
}
} catch (Exception e){
messTE(2, "exception calling hasMoreElements");
}
// Test a file that has tags, but no link
createIn2();
try {
te = new TagEnumeration(br);
} catch (Exception e) {messTE(2, "TagEnumeration constructor did not initialize correctly"); }
numTags = 0;
if (te != null) {
// Test that hasMoreElements() returns true when there are more tags
if( !te.hasMoreElements()) {
messTE(2, "hasMoreElements() returned false when there remained tags");
}
// Test that nextElement() returns something
try {
String elt = (String)te.nextElement();
if (elt == null) {
messTE(2, "nextElement() returned null when there was a tag to return");
messTE(2, "an incorrect tag was returned");
}
// Test that the tags have the right form (ie < blahblahblah >)
else {
if( !elt.equals("<HTML>") ) {
messTE(2, "an incorrect tag was returned" );
}
numTags++;
}
} catch (Exception e) {
messTE(5, "unexpected exception disabled a few automatic tests: " + e);
}
// Test that they get all the tags in the file
while( te.hasMoreElements() ) {
numTags++;
te.nextElement();
}
if( numTags != 2 ) {
messTE(2, "incorrect number of tags returned");
}
} else {
// they already were docked marks in this case
messTE(8, "Constructor returned null, so unable to check automated tests");
}
// Test a file with a tag that spans more than one line
createIn3();
try {
te = new TagEnumeration(br);
} catch (Exception e)
{messTE(2, "TagEnumeration constructor did not initialize correctly"); }
try {te.hasMoreElements();
te.nextElement();
te.hasMoreElements();
String elt = (String)te.nextElement(); // Gets the tag spanning two lines (hopefully)
if( !elt.equals("<BODY BGCOLOR=\"#400080\" TEXT=\"#FFFFFF\" LINK=\"#FFFFFF\" VLINK=\"#FFFFFF\" ALINK=\"#FFFFFF\">") ) {
messTE(2, "tag longer than one line set incorrectly");
}
} catch (Exception e) {
messTE(5, "unexpected exception in trying tags longer than one line: " + e);
}
}
// Add pts to static variable pointsTE and print message m on output file out
public static void messTE(int pts, String m) {
pointsTE= pointsTE + pts;
out.println(" -" + pts + ". " + m);
}
// Test class LinkEnumeration, writing output to output file out
public static void testLinkEnumeration() {
out.println("Checking LinkEnumeration Automatically. Messages printed (with points deducted) " +
"if errors found.");
// Test a file with tags, but no links
createIn2();
LinkEnumeration le = null;
try {
le = new LinkEnumeration(br);
} catch (Exception e) {messTE(2, "LinkEnumeration constructor did not initialize correctly"); }
// Test constructor
if (le == null) {messLE(2, "LinkEnumeration constructor did not initialize correctly"); }
// Test the case where there are no links
try {
if (le.hasMoreElements()) {
messLE(2, "hasMoreElements() returned true on a file with no links");
}
} catch (Exception e){
messLE(2, "exception calling hasMoreElements");
}
// Test file with a tag that spans more than one line
createIn3();
try {
le = new LinkEnumeration(br);
} catch (Exception e) {messTE(2, "LinkEnumeration constructor did not initialize correctly"); }
numLinks = 0;
try {
// Test that hasMoreElements() returns true when there are more links
if( !le.hasMoreElements() ) {
messLE(2, "hasMoreElements() returned false when there remained links");
}
// Test that nextElement() returns something
try {
String elt = (String)le.nextElement();
if (elt == null) {
messLE(2, "nextElement() returned null when there was a link to return");
messLE(2, "an incorrect link was returned");
}
// Test that the link returned was indeed correct
else {
if( !elt.equals("http://www.runnersworld.com/")) {
messLE(2, "link incorrect: " + elt);
}
numLinks++;
}
} catch (Exception e) {
messLE(5, "unexpected exception disabled some automatic tests: " + e);
}
// Test that they get all the tags in the file
while( le.hasMoreElements() ) {
numLinks++;
le.nextElement();
}
if( numLinks != 3 ) {
messLE(2, "incorrect number of links returned");
}
} catch (Exception e) {
messLE(5, "unexpected exception in trying tags longer than one line: " + e);
}
// Test a file with a link with a lot of whitespace in the tag
createIn4();
try {
le = new LinkEnumeration(br);
} catch (Exception e) {messTE(2, "LinkEnumeration constructor did not initialize correctly"); }
try {le.hasMoreElements(); // Gries added
String elt = (String)le.nextElement();
if( !elt.equals("http://www.runnersworld.com/") ) {
messLE(2, "tag with whitespace caused incorrect link to be returned");
}
} catch (Exception e) {
messLE(5, "unexpected exception trying to check links with whitespace: " + e);
}
}
// Add pts to static variable pointsSV and print message m on output file out
public static void messLE(int pts, String m) {
pointsLE= pointsLE + pts;
out.println(" -" + pts + ". " + m);
}
// Store the file to output in static variable out and print its name in
// Java console. throws IOException
public static void createOut() throws IOException {
File outputFile= new File(fileName);
out= new PrintStream(new FileOutputStream(outputFile));
System.out.println("Writing to file " + outputFile.getPath());
}
/** = a reader for URL url (which must not be null). If the protocol
is not http or file, null is returned. */
public static BufferedReader getReader() {
try {
InputStream is = url.openStream();
InputStreamReader isr = new InputStreamReader(is);
return new BufferedReader(isr);
} catch (IOException e) {
return null;
}
}
// Create the buffered reader for the first html file
public static void createIn1() {
try {
br= new BufferedReader(new FileReader(inputFile1));
} catch (Exception e) {
System.out.println("Error in createIn1: " +e);
}
}
// Create the buffered reader for the second html file
public static void createIn2() {
try {
br= new BufferedReader(new FileReader(inputFile2));
} catch (Exception e) {
System.out.println("Error in createIn2: " +e);
}
}
// Create the buffered reader for the third html file
public static void createIn3() {
try {
br= new BufferedReader(new FileReader(inputFile3));
} catch (Exception e) {
System.out.println("Error in createIn3: " +e);
}
}
// Create the buffered reader for the fourth html file
public static void createIn4() {
try {
br= new BufferedReader(new FileReader(inputFile4));
} catch (Exception e) {
System.out.println("Error in createIn4: " +e);
}
}
}