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cleveragents-core/features/decomposition_service_coverage_boost.feature

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Gherkin

Feature: DecompositionService uncovered code path coverage
As a developer
I want to exercise the uncovered branches in decomposition_service.py
So that clustering fallback chains and decision recording edge cases are tested
Background:
Given a fresh decomposition service instance
# --- Lines 236-239: Language clustering fallback ---
# When cluster_by_directory returns a single cluster, the service
# should fall through to cluster_by_language.
Scenario: Falls back to language clustering when directory clustering yields one cluster
Given a file set that directory-clusters into one group but language-clusters into many
When I run decomposition on those files
Then at least one node should use the language clustering strategy
# --- Lines 242-245: Size clustering fallback ---
# When both directory and language clustering return a single cluster,
# the service should fall through to cluster_by_size.
Scenario: Falls back to size clustering when directory and language clustering both yield one cluster
Given a file set where directory and language clustering each yield one group
When I run decomposition on those files
Then at least one node should use the size clustering strategy
# --- Lines 249-264: Complete fallback with warning ---
# When ALL clustering strategies produce zero clusters, the service
# emits a warning log and creates a single FALLBACK node.
Scenario: Creates fallback node with warning when all clustering strategies return empty
Given a file set where all clustering strategies return empty lists
When I run decomposition on those files
Then the result should contain a fallback strategy node
And a decomposition fallback warning should have been logged
# --- Line 320: record_decisions early return when decision_service is None ---
Scenario: record_decisions returns immediately when no decision service is injected
Given a decomposition service without a decision service
And a trivial decomposition result
When I call record_decisions with plan id "plan-00001"
Then no exception should be raised from record_decisions
# --- Combined: language fallback produces correct strategy label ---
Scenario: Language fallback strategy label appears in result metrics
Given a file set that directory-clusters into one group but language-clusters into many
When I run decomposition on those files and collect metrics
Then the result total_nodes metric should be present
And the result leaf_nodes metric should be present
# --- Combined: size fallback with deep recursion is bounded by max_depth ---
Scenario: Size clustering fallback respects max_depth limit
Given a file set where directory and language clustering each yield one group
When I run decomposition with max_depth 1 on those files
Then the result max_depth_reached should be at most 1