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Remove only the unimportant printlns and not the error message which … #3727

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Remove only the unimportant printlns and not the error message which … #3727

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3 changes: 2 additions & 1 deletion src/ch12-04-testing-the-librarys-functionality.md
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Expand Up @@ -28,7 +28,8 @@ lines that match the query. We’ll add this functionality in a function called
### Writing a Failing Test

Because we don’t need them anymore, let’s remove the `println!` statements from
*src/lib.rs* and *src/main.rs* that we used to check the program’s behavior.
*src/lib.rs* and *src/main.rs* that we used to check the program’s behavior
except the error message which will still be used as feedback to the user.
Then, in *src/lib.rs*, add a `tests` module with a test function, as we did in
[Chapter 11][ch11-anatomy]<!-- ignore -->. The test function specifies the
behavior we want the `search` function to have: it will take a query and the
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