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Rollup merge of #38112 - tarka:book-testing-fix, r=steveklabnik 

Minor fix to testing concurrency section
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Corey Farwell 2016-12-03 15:39:53 -05:00 committed by GitHub
parent fa1af0c260 d950ca175a
commit 3231641f44
1 changed files with 5 additions and 5 deletions
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@ -589,11 +589,11 @@ please see the [Documentation chapter](documentation.html).
# Testing and concurrency # Testing and concurrency
One thing that is important to note when writing tests are run concurrently One thing that is important to note when writing tests is that they may be run
using threads. For this reason you should take care that your tests are written concurrently using threads. For this reason you should take care that your tests
in such a way as to not depend on each-other, or on any shared state. "Shared are written in such a way as to not depend on each-other, or on any shared
state" can also include the environment, such as the current working directory, state. "Shared state" can also include the environment, such as the current
or environment variables. working directory, or environment variables.
If this is an issue it is possible to control this concurrency, either by If this is an issue it is possible to control this concurrency, either by
setting the environment variable `RUST_TEST_THREADS`, or by passing the argument setting the environment variable `RUST_TEST_THREADS`, or by passing the argument