fix: updates Assessment Platform to remove empty component array

Assessment Platform is a required field under Assessment Assests
but component are not. This updated that field to ensure there are
no empty component lists.

Signed-off-by: Jennifer Power <[email protected]>

Author: jpower432

models/plans/plan.go

@@ -115,11 +115,7 @@ func GenerateAssessmentPlan(ctx context.Context, comps []components.Component, i
 	}
 
 	assessmentAssets := AssessmentAssets(comps)
-	taskAssessmentSubject := oscalTypes.AssessmentSubject{
-		IncludeSubjects: &subjectSelectors,
-		Type:            defaultSubjectType,
-	}
-	*ruleBasedTask.Subjects = append(*ruleBasedTask.Subjects, taskAssessmentSubject)
+	*ruleBasedTask.Subjects = append(*ruleBasedTask.Subjects, oscalTypes.AssessmentSubject{IncludeSubjects: &subjectSelectors})
 
 	metadata := models.NewSampleMetadata()
 	metadata.Title = options.title
@@ -151,7 +147,7 @@ func newTask() oscalTypes.Task {
 		UUID:                 uuid.NewUUID(),
 		Title:                "Automated Assessment",
 		Type:                 defaultTaskType,
-		Description:          "Evaluation of defined rules for components.",
+		Description:          "Evaluation of defined rules for applicable comps.",
 		Subjects:             &[]oscalTypes.AssessmentSubject{},
 		AssociatedActivities: &[]oscalTypes.AssociatedActivity{},
 	}
@@ -296,12 +292,20 @@ func AssessmentAssets(comps []components.Component) oscalTypes.AssessmentAssets
 
 		}
 	}
+
 	// AssessmentPlatforms is a required field under AssessmentAssets
 	assessmentPlatform := oscalTypes.AssessmentPlatform{
-		UUID:           uuid.NewUUID(),
-		Title:          models.SampleRequiredString,
-		UsesComponents: &usedComponents,
+		UUID:  uuid.NewUUID(),
+		Title: models.SampleRequiredString,
+	}
+
+	if len(usedComponents) == 0 {
+		return oscalTypes.AssessmentAssets{
+			AssessmentPlatforms: []oscalTypes.AssessmentPlatform{assessmentPlatform},
+		}
 	}
+
+	assessmentPlatform.UsesComponents = &usedComponents
 	assessmentAssets := oscalTypes.AssessmentAssets{
 		Components:          &systemComponents,
 		AssessmentPlatforms: []oscalTypes.AssessmentPlatform{assessmentPlatform},