Add edge case test

Author: asamuzaK

lib/properties/fontFamily.js

@@ -67,6 +67,15 @@ module.exports.parse = function parse(v) {
       valid = true;
       continue;
     }
+    if (
+      i !== "undefined" &&
+      /^(?:[A-Z][A-Za-z\d\\-]+(?:\s+[A-Z][A-Za-z\d\\-]+)*|-?[a-z][a-z-]+)$/.test(i)
+    ) {
+      const j = i.replaceAll("\\", "").replaceAll('"', '\\"').trim();
+      font.push(`"${j}"`);
+      valid = true;
+      continue;
+    }
     if (!valid) {
       return;
     }

test/properties.test.js

@@ -1746,6 +1746,14 @@ describe("font", () => {
     );
   });
 
+  it("font-family should set / get family values", () => {
+    testPropertyValue("font-family", "Times\\ New Roman, serif", '"Times New Roman", serif');
+  });
+
+  it("font-family should set / get family values", () => {
+    testPropertyValue("font-family", '"Times\\ New Roman", serif', '"Times New Roman", serif');
+  });
+
   it("font-family should set / get family values", () => {
     testPropertyValue(
       "font-family",