Function TestReconcileContainers_DependsOnScaleDown

pkg/compose/reconcile_test.go:624–667

TestReconcileContainers_DependsOnScaleDown verifies that scale-down of a service still propagates through serviceNodes, so a dependent service waits for the scale-down's RemoveContainer to finish before starting its own ops.

(t *testing.T)

// service still propagates through serviceNodes, so a dependent service waits
// for the scale-down's RemoveContainer to finish before starting its own ops.
func TestReconcileContainers_DependsOnScaleDown(t *testing.T) {
	svc := types.ServiceConfig{Name: "db", Scale: intPtr(0)}
	hash := mustServiceHash(t, svc)

	project := &types.Project{
		Name: "myproject",
		Services: types.Services{
			"db": svc,
			"web": {
				Name:  "web",
				Scale: intPtr(1),
				DependsOn: types.DependsOnConfig{
					"db": {Condition: types.ServiceConditionStarted},
				},
			},
		},
	}
	observed := &ObservedState{
		ProjectName: "myproject",
		Containers: map[string][]ObservedContainer{
			"db": {{
				ID: "c1", Number: 1, State: container.StateRunning, ConfigHash: hash,
				Summary: container.Summary{
					ID: "c1", State: container.StateRunning,
					Labels: map[string]string{api.ServiceLabel: "db", api.ContainerNumberLabel: "1", api.ConfigHashLabel: hash},
				},
			}},
		},
		Networks: map[string]ObservedNetwork{},
		Volumes:  map[string]ObservedVolume{},
	}

	plan, err := reconcile(t.Context(), project, observed, defaultReconcileOptions(), noPrompt)
	assert.NilError(t, err)

	// db scales 1→0: Stop+Remove. web's CreateContainer must depend on the
	// Remove (#2), proving serviceNodes is updated even when only scale-down
	// happens for the dependency.
	assert.Equal(t, plan.String(), strings.TrimSpace(`
[] -> #1 service:db:1, StopContainer, scale down
[1] -> #2 service:db:1, RemoveContainer, scale down
[2] -> #3 service:web:1, CreateContainer, no existing container
`)+"\n")
}

func TestReconcileOrphans(t *testing.T) {
	project := &types.Project{