test parse errors are thrown (#294)

src/lang/abstractSyntaxTree.test.ts

@@ -1,4 +1,5 @@
 import { parser_wasm } from './abstractSyntaxTree'
+import { KCLUnexpectedError } from './errors'
 import { initPromise } from './rust'
 
 beforeAll(() => initPromise)
@@ -1706,3 +1707,19 @@ describe('should recognise callExpresions in binaryExpressions', () => {
     ])
   })
 })
+
+describe('parsing errors', () => {
+  it('should return an error when there is a unexpected closed curly brace', async () => {
+    const code = `const myVar = startSketchAt([}], %)`
+
+    let _theError
+    try {
+      const result = expect(parser_wasm(code))
+      console.log('result', result)
+    } catch (e) {
+      _theError = e
+    }
+    const theError = _theError as any
+    expect(theError).toEqual(new KCLUnexpectedError('Brace', [[29, 30]]))
+  })
+})