#387 fix: switch to image id map and add additional tests

internal/actions/mocks/container.go

@@ -0,0 +1,28 @@
+package mocks
+
+import (
+	"github.com/containrrr/watchtower/pkg/container"
+	"github.com/docker/docker/api/types"
+	container2 "github.com/docker/docker/api/types/container"
+	"time"
+)
+
+func CreateMockContainer(id string, name string, image string, created time.Time) container.Container {
+	content := types.ContainerJSON{
+		ContainerJSONBase: &types.ContainerJSONBase{
+			ID:      id,
+			Image:   image,
+			Name:    name,
+			Created: created.String(),
+		},
+		Config: &container2.Config{
+			Labels: make(map[string]string),
+		},
+	}
+	return *container.NewContainer(
+		&content,
+		&types.ImageInspect{
+			ID: image,
+		},
+	)
+}