add failing test for is.class bug

package.json

@@ -21,7 +21,7 @@
 	},
 	"scripts": {
 		"build": "del distribution && tsc",
-		"test": "tsc --noEmit && xo && ava",
+		"test": "tsc --noEmit && xo && ava && node test/test-node.js",
 		"prepare": "npm run build"
 	},
 	"files": [

test/test-node.js

@@ -0,0 +1,15 @@
+import assert from 'node:assert';
+import {test} from 'node:test';
+import is, {assert as isAssert} from '../distribution/index.js';
+
+// Note: this test is separate from the rest of the tests, as it requires
+// preserving whitespace. The tsimp modifies the source and does not
+// properly preserve the intended test case
+test('is.class', () => {
+	const minifiedClass = class{}; // eslint-disable-line keyword-spacing
+	assert.ok(is.class(minifiedClass));
+
+	assert.doesNotThrow(() => {
+		isAssert.class(minifiedClass);
+	});
+});