[Test] Hashing implementations failing due to uninitialized WorkingKey

[mrpastewart]

Select package

Auth

Which jobs/test(s) are failing

test/hasher_test.dart:BcryptHasher basic bcrypt hashing
test/hasher_test.dart:BcryptHasher bcrypt verification with argon2i hash throws
test/hasher_test.dart:ArgonHasher basic argon2i hashing
test/hasher_test.dart:Argon2IdHasher basic argon2id hashing
test/hash_manager_test.dart:HashManager isHashed returns true for hashed value
test/hash_manager_test.dart:HashManager make delegates to driver
test/hash_manager_test.dart:HashManager check delegates to driver
test/hash_manager_test.dart:HashManager needsRehash delegates to driver
test/hash_manager_test.dart:HashManager info delegates to driver

Reason for failure/description

All failing tests share the same root cause: a LateInitializationError for the '_WorkingKey' field. This error occurs in all three hashing implementations (Bcrypt, Argon2i, and Argon2id) and affects the HashManager tests that depend on these implementations.

Error messages consistently show:

LateInitializationError: Field '_WorkingKey@213300867' has not been initialized.

The error appears in three variants but with the same underlying cause:

"Bcrypt hashing not supported"
"Argon2i hashing not supported"
"Argon2id hashing not supported"

Is this a regression?

No

Media proof

Bad state: Bcrypt hashing not supported: LateInitializationError: Field '_WorkingKey@213300867' has not been initialized.
  package:platform_hashing/src/bcrypt_hasher.dart 41:7  BcryptHasher.make

Bad state: Argon2i hashing not supported: LateInitializationError: Field '_WorkingKey@213300867' has not been initialized.
  package:platform_hashing/src/argon_hasher.dart 57:7  ArgonHasher.make

Bad state: Argon2id hashing not supported: LateInitializationError: Field '_WorkingKey@213300867' has not been initialized.
  package:platform_hashing/src/argon2id_hasher.dart 34:7  Argon2IdHasher.make

Additional context

Additional context:

• Location: packages/hashing/
• The issue appears to be in the initialization of the hashing implementations
• The '_WorkingKey' field is marked as late but never initialized before use
• This affects all hashing algorithms (Bcrypt, Argon2i, Argon2id)
• The error propagates up to the HashManager level, causing failures in higher-level tests
• Key files involved:
  - src/bcrypt_hasher.dart
  - src/argon_hasher.dart
  - src/argon2id_hasher.dart
  - src/hash_manager.dart