Add coverage

Author: FrederikBolding

packages/snaps-sdk/src/internals/structs.test.ts

@@ -8,6 +8,7 @@ import {
   any,
 } from '@metamask/superstruct';
 
+import { nullUnion } from './jsx';
 import {
   enumValue,
   literal,
@@ -18,6 +19,7 @@ import {
 import type { BoxElement } from '../jsx';
 import { Footer, Icon, Text, Button, Box } from '../jsx';
 import {
+  BoldStruct,
   BoxStruct,
   FieldStruct,
   FooterStruct,
@@ -67,6 +69,14 @@ describe('typedUnion', () => {
     BoxStruct,
     typedUnion([TextStruct, FieldStruct]),
   ]);
+  const stringUnion = nullUnion([
+    string(),
+    typedUnion([TextStruct, BoldStruct]),
+  ]);
+  const nonTypedObjectUnion = nullUnion([
+    typedUnion([TextStruct, BoldStruct]),
+    object({ type: literal('bar') }),
+  ]);
 
   it('validates strictly the part of the union that matches the type', () => {
     // @ts-expect-error Invalid props.
@@ -86,6 +96,23 @@ describe('typedUnion', () => {
     );
   });
 
+  it('validates when nested in a union including primitives', () => {
+    // @ts-expect-error Invalid props.
+    const result = validate(Text({}), stringUnion);
+
+    expect(result[0]?.message).toBe(
+      'Expected the value to satisfy a union of `string | union`, but received: [object Object]',
+    );
+  });
+
+  it('validates when nested in a union including non-typed objects', () => {
+    const result = validate({ type: 'abc' }, nonTypedObjectUnion);
+
+    expect(result[0]?.message).toBe(
+      'Expected the value to satisfy a union of `union | object`, but received: [object Object]',
+    );
+  });
+
   it('validates refined elements', () => {
     const refinedUnionStruct = typedUnion([BoxStruct, FooterStruct]);
     const result = validate(