test: add tests for resource

Author: cdoublev

lib/parsers.test.js

@@ -298,12 +298,46 @@ describe('parseDashedIdentifier', () => {
 describe('parseImage', () => {
   it.todo('tests');
 });
-describe('parseUrl', () => {
+describe('parseResource', () => {
+  it('returns undefined for invalid values', () => {
+    const invalid = [
+      // Empty (new in CSS Values 4, still valid some browsers)
+      'url()',
+      'url(   )',
+      'url("")',
+      'src("")',
+      'url(', // -> parsed to url("") by browsers
+      // Invalid
+      'uurl(valid.url)',
+      'url(valid.url))',
+      'url(")', // TOFIX (valid at computed time): url(")")
+      "url(')", // TOFIX (valid at computed time): url(')')
+      'url(val"id.url)',
+      "url(val'id.url)",
+      'url(val(id.url)',
+      'url(val)id.url)',
+      'url(\\)', // TOFIX (valid at computed time): url(")")
+      'url(val\\\nid.url)', // ie. not a valid escape sequence
+      'url(var(--url))',
+      'src()', // ie. not a string
+      'src(unquoted)',
+    ];
+    invalid.forEach(input => expect(parsers.parseResource(input)).toBeUndefined());
+  });
+  it('parses a resource with an escape sequence', () => {
+    // \0 is the only valid hexDigit escape sequence in strict mode
+    expect(parsers.parseResource('url(file\\0 \\g.jpg)')).toBe('url("file\\0\\g.jpg")');
+    expect(parsers.parseResource(`url(${String.fromCharCode(33)})`)).toBe('url("!")');
+  });
+  it('returns resource wrapped between double quotes', () => {
+    expect(parsers.parseResource('url(file.jpg)')).toBe('url("file.jpg")');
+    expect(parsers.parseResource("url('file.jpg')")).toBe('url("file.jpg")');
+    expect(parsers.parseResource("src('file.jpg')")).toBe('src("file.jpg")');
+  });
   it('works with custom variable', () => {
-    expect(parsers.parseUrl('var(--url)')).toBe('var(--url)');
-    expect(parsers.parseUrl('src(var(--url))')).toBe('src(var(--url))');
+    expect(parsers.parseResource('var(--url)')).toBe('var(--url)');
+    expect(parsers.parseResource('src(var(--url))')).toBe('src(var(--url))');
   });
-  it.todo('more tests');
 });
 describe('parseString', () => {
   it('returns undefined for invalid values', () => {