Adjust testing strategy for fixture values

[BioPhoton]

The fixtures should reflect the parsing logic and edge cases should be implemented visibly as over write.

Before:

export function config(outputDir = 'tmp'): CoreConfig {
 return {
 persist: { outputDir },
 // ...
 }
};


 it('should throw if outputDir is invalid', () => {
 const persistConfigMock = persistConfig({outputDir : ' '});

 expect(() => persistConfigSchema.parse(persistConfigMock)).toThrow(
 `path is invalid`,
 );
 });

This is not in sync with the logic like default, validation etc in schemas. A change later already fail in the mock and we have to use visible overwrites for invalid data.

After:

export function config(outputDir = 'tmp'): CoreConfig {
 return {
 persist: persistConfigSchema.parse({ outputDir }),
 // ...
 }
};


 it('should throw if outputDir is invalid', () => {
 const persistConfigMock = persistConfig();
 persistConfigMock.outputDir = ' ';

 expect(() => persistConfigSchema.parse(persistConfigMock)).toThrow(
 `path is invalid`,
 );
 });