feat: check container config before update (#925)

* feat: check container config before restart
* fix: only skip when hostconfig and config differ
* fix: update test mocks to not fail tests
* test: add verify config tests

pkg/container/container.go

@@ -258,3 +258,32 @@ func (c Container) HasImageInfo() bool {
 func (c Container) ImageInfo() *types.ImageInspect {
 	return c.imageInfo
 }
+
+// VerifyConfiguration checks the container and image configurations for nil references to make sure
+// that the container can be recreated once deleted
+func (c Container) VerifyConfiguration() error {
+	if c.imageInfo == nil {
+		return errorNoImageInfo
+	}
+
+	containerInfo := c.ContainerInfo()
+	if containerInfo == nil {
+		return errorInvalidConfig
+	}
+
+	containerConfig := containerInfo.Config
+	if containerConfig == nil {
+		return errorInvalidConfig
+	}
+
+	hostConfig := containerInfo.HostConfig
+	if hostConfig == nil {
+		return errorInvalidConfig
+	}
+
+	if len(hostConfig.PortBindings) > 0 && containerConfig.ExposedPorts == nil {
+		return errorNoExposedPorts
+	}
+
+	return nil
+}