fix: throw error when glob returns no results (#207)

Author: JustinBeckwith

package.json

@@ -36,7 +36,7 @@
   },
   "devDependencies": {
     "@types/chai": "^4.2.7",
-    "@types/cheerio": "^0.22.10",
+    "@types/cheerio": "0.22.22",
     "@types/finalhandler": "^1.1.0",
     "@types/glob": "^7.1.3",
     "@types/marked": "^1.2.0",

src/index.ts

@@ -173,6 +173,11 @@ export class LinkChecker extends EventEmitter {
       const paths: string[] = [];
       for (const path of options.path) {
         const expandedPaths = await glob(path);
+        if (expandedPaths.length === 0) {
+          throw new Error(
+            `The provided glob "${path}" returned 0 results. The current working directory is "${process.cwd()}".`
+          );
+        }
         paths.push(...expandedPaths);
       }
       options.path = paths;

test/test.ts

@@ -407,4 +407,13 @@ describe('linkinator', () => {
     assert.ok(results.passed);
     assert.strictEqual(results.links.length, 3);
   });
+
+  it('should throw if a glob provides no paths to scan', async () => {
+    await assert.rejects(
+      check({
+        path: 'test/fixtures/basic/*.md',
+      }),
+      /returned 0 results/
+    );
+  });
 });