fix: make hook-project, embedding, and mesh tests hermetic

[MarvinFS]

Three test suites coupled to the developer's environment and failed outside a specific setup. All three fixes are test-only; no production code changes.

test/hook-project.test.ts

Hardcoded the resolved project basename as "agentmemory", so the suite fails for anyone who clones the repo into a directory with a different name (e.g. a fork checked out as agentmemory-lancedb). Now derives the expected basename from the git toplevel the same way resolveProject does. Also fixes a Windows-only assertion that used dir.split('/') instead of path.basename.

test/embedding-provider.test.ts

Asserts "returns null when no API keys are set" and the default embedding dimensions, but the provider resolves keys through getMergedEnv(), which re-reads ~/.agentmemory/.env on every call. A developer with a real key on disk leaks it into those assertions and the tests fail. Now mocks the config env-merge so the tests see only process.env.

test/mesh.test.ts

Let isAllowedUrl() run a real dns.lookup() on *.example.com hostnames, which hangs to the vitest timeout on DNS-restricted CI hosts. Now mocks node:dns/promises so it resolves instantly while isAllowedUrl's own logic still runs.

Verified npm run build clean and npm test green on a fresh main checkout.

Summary by CodeRabbit

• Tests
  • Improved test reliability by isolating environment-dependent behavior and mocking external dependencies to prevent file system and network access during test execution, ensuring consistent test results across different environments.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 175cdefd-3f4c-4824-a098-bdb6aeccc14e

📥 Commits

Reviewing files that changed from the base of the PR and between fd9e3bd and 1f94ba4.

📒 Files selected for processing (3)

• test/embedding-provider.test.ts
• test/hook-project.test.ts
• test/mesh.test.ts

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📝 Walkthrough

Walkthrough

This PR updates three test files to improve test isolation by mocking or deriving environmental factors at runtime. The embedding provider test now mocks the config module to prevent .env file leakage, the hook-project test derives expected basenames at runtime instead of hardcoding them, and the mesh test mocks DNS lookups to avoid network timeouts.

Changes

Test Hermiticity Isolation

Layer / File(s)	Summary
Config mock for embedding provider tests test/embedding-provider.test.ts	vi.mock on ../src/config.js overrides getEnvVar and detectEmbeddingProvider to read only process.env, preventing side effects from on-disk .env files while keeping all existing provider and dimension assertions working.
Hermetic project basename resolution test/hook-project.test.ts	Add expectedRepoBasename() helper using git rev-parse --show-toplevel with fallback to process.cwd() basename; update all resolver assertions to use runtime-computed repoBasename instead of hardcoded "agentmemory" for git, nested, non-git, and default cases.
DNS mock for mesh tests test/mesh.test.ts	Mock node:dns/promises.lookup to return a constant public IP address, preventing real DNS network calls and timeouts when isAllowedUrl() validates non-IP hostnames.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• rohitg00/agentmemory#503: Keeps embedding provider tests hermetic by controlling environment variables and config isolation.
• rohitg00/agentmemory#687: Introduces resolveProject test coverage that this PR makes hermetic through runtime basename resolution.

Suggested reviewers

• rohitg00

Poem

🐰 Hermetic tests, now pure and free,
No env files or DNS to see!
Runtime basenames dance and play,
Isolation wins the test-suite day! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely summarizes the main change: making three test suites (hook-project, embedding, and mesh) hermetic by removing environment dependencies.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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