Await expect

Author: Mingun

test/cli/run.spec.ts

@@ -647,14 +647,12 @@ Options:
     });
 
     it("produces AST", async() => {
-      const output = await exec({
+      await expect(exec({
         args: ["--ast"],
         stdin: 'foo = "1"',
         exitCode: 0,
         expected: /{.*}/,
-      });
-
-      expect(() => JSON.parse(output)).toMatchObject({
+      }).then(JSON.parse)).resolves.toMatchObject({
         type: "grammar",
         rules: [{
           type: "rule",