add some test coverage

src/language/__tests__/kind-test.ts

@@ -0,0 +1,29 @@
+/* eslint-disable @typescript-eslint/no-unused-expressions */
+import { describe, it } from 'mocha';
+
+import { Kind } from '../index.js';
+
+describe('Kind', () => {
+  it('is a term level namespace with term level enum members', () => {
+    const a: Kind.NAME = Kind.NAME;
+    a;
+    const b: Kind = Kind.NAME;
+    b;
+    const c: Kind = Kind.ARGUMENT;
+    c;
+  });
+  it('is a type level namespace with type level enum members', () => {
+    // @ts-expect-error
+    const a: Kind.NAME = 'bad';
+    a;
+    const b: Kind.NAME = 'Name';
+    b;
+    // @ts-expect-error
+    const c: Kind = 'bad';
+    c;
+    const d: Kind = 'Name';
+    d;
+    const e: Kind = 'Argument';
+    e;
+  });
+});