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testing-run.md

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titletypedescriptionnumprevious-pagenext-page
How to run tests?
section
Running the MUnit tests
4
testing-suite
testing-run-only

{% include markdown.html path="_markdown/install-munit.md" %}

Running the tests

You can run all of your test suites with a single command.

{% tabs munit-unit-test-4 class=tabs-build-tool %} {% tab 'Scala CLI' %} Using Scala CLI, the following command runs all the tests in the folder example:

scala-cli test example # Compiling project (test, Scala 3.2.1, JVM) # Compiled project (test, Scala 3.2.1, JVM) # MyTests: # + sum of two integers 0.009s

{% endtab %} {% tab 'sbt' %} In the sbt shell, the following command runs all the tests of the project example:

sbt:example> test # MyTests: # + sum of two integers 0.006s # [info] Passed: Total 1, Failed 0, Errors 0, Passed 1 # [success] Total time: 0 s, completed Nov 11, 2022 12:54:08 PM

{% endtab %} {% tab 'Mill' %} In Mill, the following command runs all the tests of the module example:

./mill example.test.test # [71/71] example.test.test # MyTests: # + sum of two integers 0.008s

{% endtab %} {% endtabs %}

The test report, printed in the console, shows the status of each test. The + symbol before a test name shows that the test passed successfully.

Add and run a failing test to see how a failure looks:

{% tabs assertions-1 class=tabs-scala-version %} {% tab 'Scala 2' %}

test("failing test") { valobtained=2+3valexpected=4 assertEquals(obtained, expected) }

{% endtab %} {% tab 'Scala 3' %}

test("failing test") { valobtained=2+3valexpected=4 assertEquals(obtained, expected) }

{% endtab %} {% endtabs %}

# MyTests: # + sum of two integers 0.008s # ==> X MyTests.failing test 0.015s munit.ComparisonFailException: ./MyTests.test.scala:13 # 12: val expected = 4 # 13: assertEquals(obtained, expected) # 14: } # values are not the same # => Obtained # 5 # => Diff (- obtained, + expected) # -5 # +4 # at munit.Assertions.failComparison(Assertions.scala:274)

The line starting with ==> X indicates that the test named failing test fails. The following lines show where and how it failed. Here it shows that the obtained value is 5, where 4 was expected.

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