There is one further test feature to mention: the ability to execute a test with specified authentication credentials.

还有一个测试功能需要说明：即使用指定的身份验证凭据执行测试的能力。

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Visual Studio 2010 Ultimate provides a built-in load test feature that allows for web performance and stress testing with up to 250 virtual users.

Visual Studio 2010 Ultimate提供了一个内置的负载测试特性，允许以最多250个虚拟用户进行Web性能和压力测试。

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For example, with the unit test feature, developers can have easier access to modern versions of IBM middleware in the unit test environment without having to wait for mainframe system upgrades.

例如，借助Unit Test特性，开发人员能够更轻松地访问单元测试环境中的IBM中间件的现代版本，而无需等待大型机更新。

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Folks who have had a chance to test the feature have been impressed.

CNN: Coming to your phone: High-definition voice

It also gave users seven days to test the feature before it went live on the site, allowing them to erase parts of their profile or tweak privacy settings.

WSJ: Facebook's New R&D Machine

McNierney acknowledged that most customers may bypass the hand cranks but he insisted they are usable. (Six minutes of hand-cranking should produce an hour of run-time.) To test the feature, the organization took out the tablet batteries to see whether the devices could run just by hand crank.

FORBES: A Look At OLPC's XO 3.0 Tablet's Solar And Kinetic Chargers