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package model.html;
import org.javatuples.Pair;
import org.junit.jupiter.api.Test;
import java.util.*;
import static org.junit.jupiter.api.Assertions.*;
public class HtmlParserTest {
String idiomaticHtml = "<!DOCTYPE html><html><head></head><body><p>Hello, world!</p></body></html>";
String brokenHtml = "<html><foo><bar></bar><><ba";
String trailingTextHtml = "bot<html><foo><bar></bar>ba";
String attributesHtml = "<html><attr hello=\"world\" foo='bar' strange=\"cha\\\"rm\" up='do\\'wn'></attr></html>";
@Test
void testIdiomaticHtml() {
var expected = new ArrayList<Node>();
var expectedChildren = new ArrayList<Node>();
var expectedGrandChildren = new ArrayList<Node>();
var expectedGreatGrandChildren = new ArrayList<Node>();
expected.add(new ElementNode("html", new ArrayList<>(), expectedChildren));
expectedChildren.add(new ElementNode("head"));
expectedChildren.add(new ElementNode("body", new ArrayList<>(), expectedGrandChildren));
expectedGrandChildren.add(new ElementNode("p", new ArrayList<>(), expectedGreatGrandChildren));
expectedGreatGrandChildren.add(new TextNode("Hello, world!"));
var parser = new HtmlParser();
assertEqualsHtml(parser.parseHtml(idiomaticHtml), expected);
}
@Test
void testBrokenHtml() {
var expected = new ArrayList<Node>();
var expectedChildren = new ArrayList<Node>();
var expectedGrandChildren = new ArrayList<Node>();
expected.add(new ElementNode("html", new ArrayList<>(), expectedChildren));
expectedChildren.add(new ElementNode("foo", new ArrayList<>(), expectedGrandChildren));
expectedGrandChildren.add(new ElementNode("bar", new ArrayList<>()));
expectedGrandChildren.add(new TextNode("<>"));
var parser = new HtmlParser();
assertEqualsHtml(parser.parseHtml(brokenHtml), expected);
}
@Test
void testTrailingTextHtml() {
var expected = new ArrayList<Node>();
var expectedChildren = new ArrayList<Node>();
var expectedGrandChildren = new ArrayList<Node>();
expected.add(new TextNode("bot"));
expected.add(new ElementNode("html", new ArrayList<>(), expectedChildren));
expected.add(new TextNode("ba"));
expectedChildren.add(new ElementNode("foo", new ArrayList<>(), expectedGrandChildren));
expectedGrandChildren.add(new ElementNode("bar", new ArrayList<>()));
var parser = new HtmlParser();
assertEqualsHtml(parser.parseHtml(trailingTextHtml), expected);
}
@Test
void testAttributesHtml() {
var expected = new ArrayList<Node>();
var expectedChildren = new ArrayList<Node>();
var expectedAttributes = new ArrayList<Pair<String, String>>();
expected.add(new ElementNode("html", new ArrayList<>(), expectedChildren));
expectedChildren.add(new ElementNode("attr", expectedAttributes));
expectedAttributes.add(new Pair<>("hello", "world"));
expectedAttributes.add(new Pair<>("foo", "bar"));
expectedAttributes.add(new Pair<>("strange", "cha\"rm"));
expectedAttributes.add(new Pair<>("up", "do'wn"));
var parser = new HtmlParser();
var parsed = parser.parseHtml(attributesHtml);
displayHtmlTree(parsed);
assertEqualsHtml(parsed, expected);
}
/**
* Complicated helper function for tests.
*/
private static void assertEqualsHtml(ArrayList<Node> html, ArrayList<Node> expected) {
for (int i = 0; i < html.size(); i++) {
assertEquals(html.get(i).data(), expected.get(i).data());
switch (html.get(i)) {
case ElementNode e ->
assertEqualsHtml(e.children, ((ElementNode) expected.get(i)).children);
default -> {}
}
}
}
/**
* Simple helper function for debugging.
* EFFECTS: prints a representation of the tree to the console for debugging purposes
*/
private void displayHtmlTree(ArrayList<Node> tree) {
for (Node node : tree) {
switch (node) {
case ElementNode e -> {
System.out.print(e.tag + ": ");
for (Node n : e.children) {
System.out.print(n.data() + " ");
}
System.out.println();
displayHtmlTree(e.children);
}
default -> System.out.println("Text: " + node.data());
}
}
}
}
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