Function TestReconcileContainers_DependsOnChain

pkg/compose/reconcile_test.go:589–619

TestReconcileContainers_DependsOnChain verifies that a dependent service's container creation depends on the last plan node of the service it depends on (via reconciler.serviceNodes). Without this, services declared in depends_on could start before their dependencies' operations complete.

(t *testing.T)

// on (via reconciler.serviceNodes). Without this, services declared in
// depends_on could start before their dependencies' operations complete.
func TestReconcileContainers_DependsOnChain(t *testing.T) {
	project := &types.Project{
		Name: "myproject",
		Services: types.Services{
			"db": {Name: "db", Scale: intPtr(1)},
			"web": {
				Name:  "web",
				Scale: intPtr(1),
				DependsOn: types.DependsOnConfig{
					"db": {Condition: types.ServiceConditionStarted},
				},
			},
		},
	}
	observed := &ObservedState{
		ProjectName: "myproject",
		Containers:  map[string][]ObservedContainer{},
		Networks:    map[string]ObservedNetwork{},
		Volumes:     map[string]ObservedVolume{},
	}

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

	// db has no dependencies, so its CreateContainer has no deps.
	// web depends on db, so its CreateContainer must depend on db's node #1.
	assert.Equal(t, plan.String(), strings.TrimSpace(`
[] -> #1 service:db:1, CreateContainer, no existing container
[1] -> #2 service:web:1, CreateContainer, no existing container
`)+"\n")
}

// TestReconcileContainers_DependsOnScaleDown verifies that scale-down of a
// service still propagates through serviceNodes, so a dependent service waits