Tests: Significantly improved coverage of the unit tests

features/database_models_uncovered_branches.feature

@@ -0,0 +1,51 @@
+@phase1 @database @models @uncovered_branches
+Feature: Database models uncovered branch coverage
+  As a developer
+  I want to exercise uncovered branches in database model from_domain methods
+  So that branch and line coverage improves for models.py
+
+  # -------------------------------------------------------------------
+  # LifecyclePlanModel.from_domain: empty arguments (L948 loop zero iterations)
+  # -------------------------------------------------------------------
+
+  @plan @from_domain @empty_arguments
+  Scenario: PlanModel from_domain with empty arguments produces no argument rows
+    Given db models branch a Plan domain object with empty arguments
+    When db models branch the plan is converted via LifecyclePlanModel from_domain
+    Then db models branch the resulting plan model has no argument rows
+
+  # -------------------------------------------------------------------
+  # ToolModel.from_domain: dict-based tool (L1665-1666 dict branch of _get)
+  # -------------------------------------------------------------------
+
+  @tool @from_domain @dict_tool
+  Scenario: ToolModel from_domain accepts a plain dict and reads fields via dict.get
+    Given db models branch a plain dict describing a tool
+    When db models branch the dict is converted via ToolModel from_domain
+    Then db models branch the resulting tool model has the expected name and description
+
+  @tool @from_domain @dict_tool_bindings
+  Scenario: ToolModel from_domain with dict tool and resource bindings
+    Given db models branch a plain dict describing a tool with resource bindings
+    When db models branch the binding dict is converted via ToolModel from_domain
+    Then db models branch the resulting tool model has resource binding rows
+
+  # -------------------------------------------------------------------
+  # SessionModel.from_domain: non-empty messages (L1920-1921)
+  # -------------------------------------------------------------------
+
+  @session @from_domain @messages
+  Scenario: SessionModel from_domain populates child message models
+    Given db models branch a Session domain object with two messages
+    When db models branch the session is converted via SessionModel from_domain
+    Then db models branch the resulting session model has two message children
+
+  # -------------------------------------------------------------------
+  # SkillModel class columns: short_name, description (L2131-2132)
+  # -------------------------------------------------------------------
+
+  @skill @from_domain @columns
+  Scenario: SkillModel from_domain populates short_name and description columns
+    Given db models branch a Skill domain dict with name and description
+    When db models branch the skill dict is converted via SkillModel from_domain
+    Then db models branch the resulting skill model has correct short_name and description