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cleveragents-core/features/component_resolver.feature
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feat(extensibility): implement pluggable scope chain resolution
Introduce ComponentResolver with a deterministic 3-level scope chain
(plan > project > global) for resolving pluggable Protocol-based
components. The resolver supports caching, thread-safety, config.toml
extension loading, plan metadata loading, introspection APIs, and
security-restricted dynamic imports.

Includes 39 BDD scenarios, 9 Robot Framework integration tests,
ASV benchmarks, and vulture whitelist updates. 100% code coverage
on component_resolver.py; overall coverage at 97.07%.

ISSUES CLOSED: #552
2026-03-07 11:49:14 -05:00

349 lines
16 KiB
Gherkin

@extensibility @component_resolver
Feature: Pluggable Component Resolution with Scope Chain
As a CleverAgents developer
I want a ComponentResolver that resolves pluggable components through a
3-level scope chain (plan > project > global)
So that extension points can be consistently overridden at different scopes
# ---------------------------------------------------------------------------
# Global default resolution
# ---------------------------------------------------------------------------
@scope_chain @global
Scenario: Global default resolution when no overrides exist
Given a fresh ComponentResolver instance
And a global default implementation for a test protocol
When I resolve the test protocol with no plan or project context
Then the resolved component should be the global default
And the resolution scope should be "global"
@scope_chain @global
Scenario: Global default registered at startup is available
Given a fresh ComponentResolver instance
And a global default implementation for a test protocol
Then has_global should return True for the test protocol
@scope_chain @global
Scenario: Resolving unregistered component raises error
Given a fresh ComponentResolver instance
When I attempt to resolve an unregistered protocol
Then a ComponentNotFoundError should be raised
# ---------------------------------------------------------------------------
# Project-level override
# ---------------------------------------------------------------------------
@scope_chain @project
Scenario: Project override takes precedence over global
Given a fresh ComponentResolver instance
And a global default implementation for a test protocol
And a project-level override for project "my-project" for the test protocol
When I resolve the test protocol for project "my-project"
Then the resolved component should be the project override
And the resolution scope should be "project"
@scope_chain @project
Scenario: Project without override falls through to global
Given a fresh ComponentResolver instance
And a global default implementation for a test protocol
When I resolve the test protocol for project "other-project"
Then the resolved component should be the global default
And the resolution scope should be "global"
@scope_chain @project
Scenario: Project override registered via register_project
Given a fresh ComponentResolver instance
And a project-level override for project "my-project" for the test protocol
Then has_project should return True for "my-project" and the test protocol
@scope_chain @project
Scenario: Empty project_id raises error
Given a fresh ComponentResolver instance
When I attempt to register a project override with empty project_id
Then a ComponentRegistrationError should be raised
# ---------------------------------------------------------------------------
# Plan-level override (highest priority)
# ---------------------------------------------------------------------------
@scope_chain @plan
Scenario: Plan override takes highest precedence
Given a fresh ComponentResolver instance
And a global default implementation for a test protocol
And a project-level override for project "my-project" for the test protocol
And a plan-level override for plan "plan-001" for the test protocol
When I resolve the test protocol for plan "plan-001" and project "my-project"
Then the resolved component should be the plan override
And the resolution scope should be "plan"
@scope_chain @plan
Scenario: Plan without override falls through to project then global
Given a fresh ComponentResolver instance
And a global default implementation for a test protocol
And a project-level override for project "my-project" for the test protocol
When I resolve the test protocol for plan "plan-002" and project "my-project"
Then the resolved component should be the project override
And the resolution scope should be "project"
@scope_chain @plan
Scenario: Empty plan_id raises error
Given a fresh ComponentResolver instance
When I attempt to register a plan override with empty plan_id
Then a ComponentRegistrationError should be raised
# ---------------------------------------------------------------------------
# Fallthrough on missing scope
# ---------------------------------------------------------------------------
@scope_chain @fallthrough
Scenario: Missing plan and project falls through to global
Given a fresh ComponentResolver instance
And a global default implementation for a test protocol
When I resolve the test protocol for plan "unknown-plan" and project "unknown-project"
Then the resolved component should be the global default
And the resolution scope should be "global"
@scope_chain @fallthrough
Scenario: Only plan registered without global still resolves from plan
Given a fresh ComponentResolver instance
And a plan-level override for plan "plan-only" for the test protocol
When I resolve the test protocol for plan "plan-only"
Then the resolved component should be the plan override
And the resolution scope should be "plan"
# ---------------------------------------------------------------------------
# Caching
# ---------------------------------------------------------------------------
@scope_chain @caching
Scenario: Resolution is cached per scope
Given a fresh ComponentResolver instance
And a global default implementation for a test protocol
When I resolve the test protocol twice with no context
Then the cache size should be 1
And both resolutions should return the same result
@scope_chain @caching
Scenario: Cache is invalidated on new registration
Given a fresh ComponentResolver instance
And a global default implementation for a test protocol
When I resolve the test protocol with no plan or project context
And I register a project-level override for project "p1" for the test protocol
Then the cache size should be 0
# ---------------------------------------------------------------------------
# Config.toml extension loading
# ---------------------------------------------------------------------------
@scope_chain @config
Scenario: Load project extensions from config mapping
Given a fresh ComponentResolver instance
And an extensions config mapping with a known module path
When I load project extensions for project "ext-project"
Then the extension should be registered at the project scope
# ---------------------------------------------------------------------------
# Plan metadata extension loading
# ---------------------------------------------------------------------------
@scope_chain @config
Scenario: Load plan extensions from metadata mapping
Given a fresh ComponentResolver instance
And a plan metadata mapping with a known module path
When I load plan extensions for plan "ext-plan"
Then the extension should be registered at the plan scope
# ---------------------------------------------------------------------------
# Removal
# ---------------------------------------------------------------------------
@scope_chain @removal
Scenario: Remove global implementation
Given a fresh ComponentResolver instance
And a global default implementation for a test protocol
When I remove the global implementation for the test protocol
Then has_global should return False for the test protocol
@scope_chain @removal
Scenario: Remove project implementation
Given a fresh ComponentResolver instance
And a project-level override for project "rm-project" for the test protocol
When I remove the project implementation for "rm-project" and the test protocol
Then has_project should return False for "rm-project" and the test protocol
@scope_chain @removal
Scenario: Remove plan implementation
Given a fresh ComponentResolver instance
And a plan-level override for plan "rm-plan" for the test protocol
When I remove the plan implementation for "rm-plan" and the test protocol
Then has_plan should return False for "rm-plan" and the test protocol
# ---------------------------------------------------------------------------
# Introspection
# ---------------------------------------------------------------------------
@scope_chain @introspection
Scenario: List global types
Given a fresh ComponentResolver instance
And a global default implementation for a test protocol
Then list_global_types should include the test protocol name
@scope_chain @introspection
Scenario: List project types
Given a fresh ComponentResolver instance
And a project-level override for project "intro-project" for the test protocol
Then list_project_types for "intro-project" should include the test protocol name
@scope_chain @introspection
Scenario: List plan types
Given a fresh ComponentResolver instance
And a plan-level override for plan "intro-plan" for the test protocol
Then list_plan_types for "intro-plan" should include the test protocol name
# ---------------------------------------------------------------------------
# Clear
# ---------------------------------------------------------------------------
@scope_chain @clear
Scenario: Clear removes all registrations
Given a fresh ComponentResolver instance
And a global default implementation for a test protocol
And a project-level override for project "c-project" for the test protocol
And a plan-level override for plan "c-plan" for the test protocol
When I clear the resolver
Then has_global should return False for the test protocol
And has_project should return False for "c-project" and the test protocol
And has_plan should return False for "c-plan" and the test protocol
# ---------------------------------------------------------------------------
# Extension point catalog
# ---------------------------------------------------------------------------
@scope_chain @catalog
Scenario: Register and list extension points
Given a fresh ComponentResolver instance
When I register an extension point for the test protocol
Then list_extension_points should include the test protocol
# ---------------------------------------------------------------------------
# None implementation rejected
# ---------------------------------------------------------------------------
@scope_chain @validation
Scenario: Registering None as global raises error
Given a fresh ComponentResolver instance
When I attempt to register None as a global implementation
Then a ComponentRegistrationError should be raised
@scope_chain @validation
Scenario: Registering None as project implementation raises error
Given a fresh ComponentResolver instance
When I attempt to register None as a project implementation
Then a ComponentRegistrationError should be raised
@scope_chain @validation
Scenario: Registering None as plan implementation raises error
Given a fresh ComponentResolver instance
When I attempt to register None as a plan implementation
Then a ComponentRegistrationError should be raised
# ---------------------------------------------------------------------------
# Security: Module prefix restriction
# ---------------------------------------------------------------------------
@scope_chain @security
Scenario: Import from disallowed module prefix raises error
Given a fresh ComponentResolver instance
When I attempt to import a component from "evil_module:Hacker"
Then a ComponentRegistrationError should be raised
@scope_chain @security
Scenario: Import with invalid format raises error
Given a fresh ComponentResolver instance
When I attempt to import a component from "no_colon_here"
Then a ComponentRegistrationError should be raised
# ---------------------------------------------------------------------------
# Edge cases: unknown extension names and failed imports
# ---------------------------------------------------------------------------
@scope_chain @config @edge
Scenario: Load project extensions with unknown type name skips gracefully
Given a fresh ComponentResolver instance
And an extensions config with an unknown extension type name
When I load project extensions with unknown type for project "edge-proj"
Then the loaded extensions list should be empty
@scope_chain @config @edge
Scenario: Load project extensions with bad module path logs warning
Given a fresh ComponentResolver instance
And an extensions config with a bad module path
When I load project extensions with bad path for project "bad-proj"
Then the loaded extensions list should be empty
@scope_chain @config @edge
Scenario: Load plan extensions with unknown type name skips gracefully
Given a fresh ComponentResolver instance
And a plan metadata with an unknown extension type name
When I load plan extensions with unknown type for plan "edge-plan"
Then the loaded extensions list should be empty
@scope_chain @config @edge
Scenario: Load plan extensions with bad module path logs warning
Given a fresh ComponentResolver instance
And a plan metadata with a bad module path
When I load plan extensions with bad path for plan "bad-plan"
Then the loaded extensions list should be empty
# ---------------------------------------------------------------------------
# Edge cases: remove from non-existent scope
# ---------------------------------------------------------------------------
@scope_chain @removal @edge
Scenario: Remove project from non-existent project returns False
Given a fresh ComponentResolver instance
When I remove the project implementation for "nonexistent" and the test protocol
Then the component resolver removal result should be False
@scope_chain @removal @edge
Scenario: Remove plan from non-existent plan returns False
Given a fresh ComponentResolver instance
When I remove the plan implementation for "nonexistent" and the test protocol
Then the component resolver removal result should be False
# ---------------------------------------------------------------------------
# Edge cases: list types for non-existent scopes
# ---------------------------------------------------------------------------
@scope_chain @introspection @edge
Scenario: List project types for non-existent project returns empty
Given a fresh ComponentResolver instance
Then list_project_types for "nonexistent" should be empty
@scope_chain @introspection @edge
Scenario: List plan types for non-existent plan returns empty
Given a fresh ComponentResolver instance
Then list_plan_types for "nonexistent" should be empty
# ---------------------------------------------------------------------------
# Edge case: _ScopeRegistry.remove returns False for missing type
# ---------------------------------------------------------------------------
@scope_chain @removal @edge
Scenario: Remove non-existent type from global returns False
Given a fresh ComponentResolver instance
When I remove the global implementation for the test protocol
Then the component resolver removal result should be False
# ---------------------------------------------------------------------------
# Edge case: invalidate_cache explicitly
# ---------------------------------------------------------------------------
@scope_chain @caching @edge
Scenario: Explicit invalidate_cache clears all cached entries
Given a fresh ComponentResolver instance
And a global default implementation for a test protocol
When I resolve the test protocol with no plan or project context
And I explicitly invalidate the cache
Then the cache size should be 0