How can I make Mix run only specific tests from my suite of tests?

Question

When running mix test all tests are executed

robkuz robkuz · Accepted Answer · 2014-10-01T20:36:09

There are 5 ways to run only specific tests with Elixir

run a single file with mix test path_to_your_tests/your_test_file.exs
This will run all test defined in your_test_file.exs
run a specific test from a specific test file by adding a colon and the line number of that test
for example mix test path_to_your_tests/your_test_file.exs:12 will run the test at line 12 of your_test_file.exs
define a tag to exclude on your test methods
```
defmodule MyTests do
    @tag disabled: true
    test "some test" do
        #testtesttest
    end
end
```
on the command line execute your tests like this
mix test --exclude disabled
define a tag to include on your test methods
```
defmodule MyTests do
    @tag mustexec: true
    test "some test" do
        #testtesttest
    end
end
```
on the command line execute your tests like this
mix test --only mustexec
Generally exclude some tagged tests by adding this to your test/test_helper.exsfile
ExUnit.configure exclude: [disabled: true]

Warning: Mix has an --include directive. This directive is NOT the same as the --only directive. Include is used to break the general configuration (exclusion) from the test/test_helper.exsfile described under 4).

For some reason googling for elixir mix include testsor the like never shows up on my search results therefore I have written this entry and its answer. For more info, see the Mix documentation.

How can I make Mix run only specific tests from my suite of tests?

1 Answers