Always consider using a dedicated preproduction environment to test changes before going live with them.

在将更改投入生产应用之前，始终考虑使用专用的生产前环境来测试更改。

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I started relying heavily on functional tests (over unit tests) which allowed me to test changes as a user would.

我开始严重依赖功能测试，而且超过了对单元测试的依赖，这让我能像用户那样测试应用中的变化。

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In this way, every time any property on the component under test changes value, it can be seen by the operator immediately.

这样，每当被测试的组件修改属性值时，操作员都可以立即觉察到。

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The FAA has also approved limited test flights for two aircraft to test the changes in the batteries.

BBC: Dreamliner battery redesign approved by FAA

For riders who decide to progress to the full test, more changes are afoot next January, when a new, single-part on-road test will be phased in.

BBC: The rush to the scooter

The Australian Greens, and some Labor parliamentarians, want a public-interest test to govern changes in media ownership.

ECONOMIST: Fears grow for a newspaper group��s editorial independence