feat(stringify): Escape unsafe characters

src/stringify.spec.ts

@@ -0,0 +1,22 @@
+import { readFileSync } from "fs";
+import { parse, stringify } from ".";
+import { tests } from "./__fixtures__/tests";
+
+describe("Stringify & re-parse", () => {
+    describe("Own tests", () => {
+        for (const [selector, expected, message] of tests) {
+            test(`${message} (${selector})`, () => {
+                expect(parse(stringify(expected))).toStrictEqual(expected);
+            });
+        }
+    });
+
+    it("Collected Selectors (qwery, sizzle, nwmatcher)", () => {
+        const out = JSON.parse(
+            readFileSync(`${__dirname}/__fixtures__/out.json`, "utf8")
+        );
+        for (const s of Object.keys(out)) {
+            expect(parse(s)).toStrictEqual(out[s]);
+        }
+    });
+});

src/stringify.ts

@@ -10,6 +10,14 @@ const actionTypes: { [key: string]: string } = {
     hyphen: "|",
 };
 
+const charsToEscape = new Set([
+    ...Object.values(actionTypes).filter(Boolean),
+    ":",
+    "[",
+    "]",
+    " ",
+]);
+
 export default function stringify(token: Selector[][]): string {
     return token.map(stringifySubselector).join(", ");
 }
@@ -73,6 +81,8 @@ function stringifyToken(token: Selector): string {
 }
 
 function escapeName(str: string): string {
-    // TODO
-    return str;
+    return str
+        .split("")
+        .map((c) => (charsToEscape.has(c) ? `\\${c}` : c))
+        .join("");
 }