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Diffstat (limited to 'doc/development/testing_guide/end_to_end/best_practices.md')
| -rw-r--r-- | doc/development/testing_guide/end_to_end/best_practices.md | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/development/testing_guide/end_to_end/best_practices.md b/doc/development/testing_guide/end_to_end/best_practices.md index 2b4212a0172..15520d8a6b1 100644 --- a/doc/development/testing_guide/end_to_end/best_practices.md +++ b/doc/development/testing_guide/end_to_end/best_practices.md @@ -223,6 +223,15 @@ In summary: - **Do**: Split tests across separate files, unless the tests share expensive setup. - **Don't**: Put new tests in an existing file without considering the impact on parallelization. +## `let` variables vs instance variables + +By default, follow the [testing best practices](../best_practices.md#subject-and-let-variables) when using `let` +or instance variables. However, in end-to-end tests, set-ups such as creating resources are expensive. +If you use `let` to store a resource, it will be created for each example separately. +If the resource can be shared among multiple examples, use an instance variable in the `before(:all)` +block instead of `let` to save run time. +When the variable cannot be shared by multiple examples, use `let`. + ## Limit the use of the UI in `before(:context)` and `after` hooks Limit the use of `before(:context)` hooks to perform setup tasks with only API calls, |