Because we want our tests to run quickly, we need to design our tests to run in parallel, potentially across many different servers. We may also want to run different categories of tests in parallel. For example, when a build passes our acceptance tests, we may run our performance testing in parallel with our security testing, as shown in Figure 10.3. We may or may not allow manual exploratory testing until the build has passed all our automated tests—which enables faster feedback but may also allow manual testing on builds that will eventually fail. Figure 10.3: Running Automated and Manual
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