feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

1 files changed, 109 insertions, 0 deletions

diff --git a/vanilla/node_modules/css-tree/lib/definition-syntax/scanner.js b/vanilla/node_modules/css-tree/lib/definition-syntax/scanner.js
new file mode 100644
index 0000000..d0b1895
--- /dev/null
+++ b/vanilla/node_modules/css-tree/lib/definition-syntax/scanner.js
@@ -0,0 +1,109 @@
+import { SyntaxError } from './SyntaxError.js';
+
+const TAB = 9;
+const N = 10;
+const F = 12;
+const R = 13;
+const SPACE = 32;
+const NAME_CHAR = new Uint8Array(128).map((_, idx) =>
+    /[a-zA-Z0-9\-]/.test(String.fromCharCode(idx)) ? 1 : 0
+);
+
+export class Scanner {
+    constructor(str) {
+        this.str = str;
+        this.pos = 0;
+    }
+
+    charCodeAt(pos) {
+        return pos < this.str.length ? this.str.charCodeAt(pos) : 0;
+    }
+    charCode() {
+        return this.charCodeAt(this.pos);
+    }
+    isNameCharCode(code = this.charCode()) {
+        return code < 128 && NAME_CHAR[code] === 1;
+    }
+    nextCharCode() {
+        return this.charCodeAt(this.pos + 1);
+    }
+    nextNonWsCode(pos) {
+        return this.charCodeAt(this.findWsEnd(pos));
+    }
+    skipWs() {
+        this.pos = this.findWsEnd(this.pos);
+    }
+    findWsEnd(pos) {
+        for (; pos < this.str.length; pos++) {
+            const code = this.str.charCodeAt(pos);
+            if (code !== R && code !== N && code !== F && code !== SPACE && code !== TAB) {
+                break;
+            }
+        }
+
+        return pos;
+    }
+    substringToPos(end) {
+        return this.str.substring(this.pos, this.pos = end);
+    }
+    eat(code) {
+        if (this.charCode() !== code) {
+            this.error('Expect `' + String.fromCharCode(code) + '`');
+        }
+
+        this.pos++;
+    }
+    peek() {
+        return this.pos < this.str.length ? this.str.charAt(this.pos++) : '';
+    }
+    error(message) {
+        throw new SyntaxError(message, this.str, this.pos);
+    }
+
+    scanSpaces() {
+        return this.substringToPos(this.findWsEnd(this.pos));
+    }
+    scanWord() {
+        let end = this.pos;
+
+        for (; end < this.str.length; end++) {
+            const code = this.str.charCodeAt(end);
+            if (code >= 128 || NAME_CHAR[code] === 0) {
+                break;
+            }
+        }
+
+        if (this.pos === end) {
+            this.error('Expect a keyword');
+        }
+
+        return this.substringToPos(end);
+    }
+    scanNumber() {
+        let end = this.pos;
+
+        for (; end < this.str.length; end++) {
+            const code = this.str.charCodeAt(end);
+
+            if (code < 48 || code > 57) {
+                break;
+            }
+        }
+
+        if (this.pos === end) {
+            this.error('Expect a number');
+        }
+
+        return this.substringToPos(end);
+    }
+    scanString() {
+        const end = this.str.indexOf('\'', this.pos + 1);
+
+        if (end === -1) {
+            this.pos = this.str.length;
+            this.error('Expect an apostrophe');
+        }
+
+        return this.substringToPos(end + 1);
+    }
+};