Adjusts the iOS implementation of local_auth to use a protocol wrapping
the relevant parts of `LAContext` instead of using `LAContext` directly,
allowing the tests to use a stub implementation instead of OCMock.

The goal is to unblock converting the unit tests to Swift, but even by
itself this actually makes the tests much shorter and easier to
understand.

Part of flutter/flutter#119104

Adjusts the iOS implementation of local_auth to use a protocol wrapping the relevant parts of `LAContext` instead of using `LAContext` directly, allowing the tests to use a stub implementation instead of OCMock.

The goal is to unblock converting the unit tests to Swift, but even by itself this actually makes the tests much shorter and easier to understand.

Part of flutter/flutter#119104

Converts native unit tests from Objective-C to Swift, as a first step
toward an eventual plugin conversion. Since OCMock usage was removed in
a previous PR, the tests are converted essentially directly (the
rewrites were largely mechanical syntax replacement), without any
changes needed to production code.

Part of flutter/flutter#119104

Adjusts the iOS implementation of local_auth to use a protocol wrapping the relevant parts of `LAContext` instead of using `LAContext` directly, allowing the tests to use a stub implementation instead of OCMock.

The goal is to unblock converting the unit tests to Swift, but even by itself this actually makes the tests much shorter and easier to understand.

Part of flutter/flutter#119104

Converts native unit tests from Objective-C to Swift, as a first step toward an eventual plugin conversion. Since OCMock usage was removed in a previous PR, the tests are converted essentially directly (the rewrites were largely mechanical syntax replacement), without any changes needed to production code.

There are a few places where interacting with the Pigeon-generated Obj-C is somewhat awkward because the NSError signature isn't auto-converting to `throw` in cases where we use `NSNumber` wrapping, but all that will get cleaned up when we switch the plugin over to Swift Pigeon generation and have idiomatic Swift APIs that the tests will be calling instead.

Fixes a couple of false positives in the repo tooling surfaced by this PR:
- `darwin/Tests/` wasn't recognized as a test directory.
- Swift tests weren't recognized as exempt from requiring Swift entries in the podspec.

Part of flutter/flutter#119104

Adjusts the iOS implementation of local_auth to use a protocol wrapping the relevant parts of `LAContext` instead of using `LAContext` directly, allowing the tests to use a stub implementation instead of OCMock.

The goal is to unblock converting the unit tests to Swift, but even by itself this actually makes the tests much shorter and easier to understand.

Part of flutter/flutter#119104

Converts native unit tests from Objective-C to Swift, as a first step toward an eventual plugin conversion. Since OCMock usage was removed in a previous PR, the tests are converted essentially directly (the rewrites were largely mechanical syntax replacement), without any changes needed to production code.

There are a few places where interacting with the Pigeon-generated Obj-C is somewhat awkward because the NSError signature isn't auto-converting to `throw` in cases where we use `NSNumber` wrapping, but all that will get cleaned up when we switch the plugin over to Swift Pigeon generation and have idiomatic Swift APIs that the tests will be calling instead.

Fixes a couple of false positives in the repo tooling surfaced by this PR:
- `darwin/Tests/` wasn't recognized as a test directory.
- Swift tests weren't recognized as exempt from requiring Swift entries in the podspec.

Part of flutter/flutter#119104