test: add missing unit tests for adk and core packages

[yashrajshuklaaa]

What

Unit tests for go/adk/pkg/auth and go/adk/pkg/runner. No production code changes.

Changes

• auth/token_test.go: token lifecycle, header injection, TokenRoundTripper.
• runner/adapter_test.go: agentNameFromAppName, splitCSV, buildTokenPropagationPlugin env branching, and CreateRunnerConfig wiring (app-name default, session fallback, missing-model error).

Revision note

Per @EItanya's review: removed tests for core/internal/controller/reconciler/{status,utils}, translator, and service/agent. Their implementation moved or was removed on main, so they no longer compiled. Removed two ShareTools test cases that didn't actually test ShareTools behavior. Removed the mock HTTP server and fixtures since no test called the model; CreateRunnerConfig tests now build the config inline.

Validation

go build, go vet, go test - All pass.

[mesutoezdil]

name says assert, but this just builds an error. confusing name.

[yashrajshuklaaa]

fixed :) @mesutoezdil
PTAL

[mesutoezdil]

comment says omitted, but code sets it to a missing name. pick one wording.

[yashrajshuklaaa]

resolved! thanks for the suggestion.

[yashrajshuklaaa]

@EItanya @supreme-gg-gg the test-e2e failure (TestAgentInstanceActiveTask) looks unrelated to this PR. it's a stream/actor-suspend race in an e2e test and this PR only adds unit tests with no production code changes. Could one of you re-run the job or take a look when you get a chance?

[yashrajshuklaaa]

@EItanya Could you please approve the workflow run so CI can complete?

[EItanya]

🤖 AI-assisted review.

Thanks for putting time into improving test coverage! I think this PR would be more useful if we narrowed it to tests that protect current behavior against regressions.

• Several of the new core tests reference packages or functions that have since been removed. At the current head (05d13d19), the focused test run fails to compile four core packages. Those obsolete cases should be removed.
• The shared-tools tests only assert that an agent is created, but CreateRunnerConfig no longer uses controllerClient or ShareTools. They pass without exercising the behavior their names describe, so those cases can also be removed.
• The runner configuration tests never call the model, so the mock HTTP server and response fixture seem unnecessary.

The auth header assertions and parsing edge cases look worth keeping. Could you trim the PR to focused tests for behavior that still exists, with assertions that would fail if that behavior broke? A smaller suite with clear regression coverage would be a stronger addition.

[yashrajshuklaaa]

@EItanya all fixed. Removed the obsolete core tests, the hollow ShareTools tests, and the unused mock server. PTAL