🧪 [Tests] Fix failing tests + bad Vitest config

pkg/earwurm/src/Stack.ts

@@ -18,7 +18,7 @@ export class Stack extends EmittenCommon<StackEventMap> {
   static readonly #loadError = (
     id: StackId,
     path: string,
-    error: string,
+    error: unknown,
   ): StackError => ({
     id,
     message: [`Failed to load: ${path}`, getErrorMessage(error)],
@@ -170,7 +170,7 @@ export class Stack extends EmittenCommon<StackEventMap> {
     ).catch((error) => {
       this.emit(
         'error',
-        Stack.#loadError(this.id, this.path, getErrorMessage(error)),
+        Stack.#loadError(this.id, this.path, error),
       );
 
       return scratchBuffer(this.context);

pkg/earwurm/src/tests/Stack.test.ts

@@ -415,8 +415,7 @@ describe('Stack component', () => {
         id: mockStackId,
         message: [
           `Failed to load: ${mockPath}`,
-          // This string ends with `[object Request]`.
-          expect.stringContaining('Failed to parse URL from'),
+          expect.stringContaining('Failed to execute'),
         ],
       });
     });

pkg/earwurm/vite.config.ts

@@ -4,6 +4,8 @@ import dts from 'vite-plugin-dts';
 
 import pkg from './package.json';
 
+// TODO: We may need a unique `vitest.config.ts` file for this
+// package... but simply adding that file does not appear to work.
 export default defineConfig({
   build: {
     lib: {

vitest.config.ts

@@ -5,10 +5,12 @@ export default mergeConfig(
   viteConfig,
   defineConfig({
     test: {
+      environment: 'happy-dom',
       setupFiles: 'config/tests-setup',
-      sequence: {
-        concurrent: true,
-      },
+      // Not running tests concurrently because we would
+      // need to refactor many tests to more thoroughly reset
+      // between each test.
+      // sequence: {concurrent: true},
     },
   }),
 );