Fix jsdom to-port-to-wpts error (#18)

Ref https://github.com/jsdom/jsdom/actions/runs/7352505261

src/js/matcher.js

@@ -2518,7 +2518,8 @@ export class Matcher {
             }
           } else if (!filterLeaves.length) {
             if (targetType === TARGET_ALL) {
-              nodes = collectedNodes;
+              const n = [...nodes];
+              nodes = new Set([...n, ...collectedNodes]);
             } else {
               const [node] = [...collectedNodes];
               nodes.add(node);

src/js/parser.js

@@ -103,6 +103,10 @@ export const preprocess = (...args) => {
   } else if (selector === undefined || selector === null) {
     selector = Object.prototype.toString.call(selector)
       .slice(TYPE_FROM, TYPE_TO).toLowerCase();
+  } else if (Array.isArray(selector)) {
+    selector = selector.join(',');
+  } else if (Object.prototype.hasOwnProperty.call(selector, 'toString')) {
+    selector = selector.toString();
   } else {
     throw new DOMException(`Invalid selector ${selector}`, SYNTAX_ERR);
   }

test/wpt.test.js

@@ -2070,4 +2070,35 @@ describe('local wpt test cases', () => {
       assert.isFalse(res, 'result');
     });
   });
+
+  describe('jsdom: to-port-to-wpts/query-selector-all.js', () => {
+    it('should get matched node(s)', () => {
+      const html = `
+        <span>Hello!<strong>Goodbye!</strong><strong>Hello Again</strong></span>
+        <p>This is an <em>Important</em> paragraph</p>
+      `;
+      document.body.innerHTML = html;
+      const res = document.querySelectorAll(['strong', 'em']);
+      assert.strictEqual(res.length, 3, 'length');
+      assert.strictEqual(res[0].localName, 'strong', 'node');
+      assert.strictEqual(res[1].localName, 'strong', 'node');
+      assert.strictEqual(res[2].localName, 'em', 'node');
+    });
+
+    it('should get matched node(s)', () => {
+      const html = `
+        <span>Hello!<strong>Goodbye!</strong><strong>Hello Again</strong></span>
+        <p>This is an <em>Important</em> paragraph</p>
+      `;
+      document.body.innerHTML = html;
+      const stringifiableObj = {
+        toString() {
+          return 'p';
+        }
+      };
+      const res = document.querySelectorAll(stringifiableObj);
+      assert.strictEqual(res.length, 1, 'length');
+      assert.strictEqual(res[0].localName, 'p', 'node');
+    });
+  });
 });