How to run a single unit test method from command line while targeting a specific Gradle build flavor

Question

I am trying to run just a single Android test case from the command line.

From the IDE I can just right click and run, but from CLI with the following it fails:

./gradlew test --tests "com.xyz.b.module.TestClass.testToRun"

Error:

> Unknown command-line option '--tests'.

How can I run a single UNIT TEST method? I want to emphasis that I want to run a single unit test, not an instrumentation test from command line.

Update: I have a camera app. Imagine that I have a build variant called usCameraDebug. (That means united states camera debug) Now can you tell me how to run a single test case i called mySingleTest?

I tried this as you mentioned: ./gradlew test --tests "*mySingleTest"

and ./gradlew app:usCameraDebug test --tests "*mySingleTest"

and also: ./gradlew app:usCameraDebugUnitTest --tests "*mySingleTest" but it . does not work. caan you tell me exactly what to type based on my build variant. its in a module called "app" as defaulted.

Here is the test I want to run:

package  com.xyz.cameras.parts
    @Test
        fun mySingleTest(){
            assertEquals(12,13)
        }

Answer 1

You need to specify a wildcard in the pattern while looking for the test name, and make sure to use module + flavor. --tests will not work with ./gradlew test or ./gradlew check

Try this pattern -> ./gradlew :<module>:<flavor> --tests "*textThatTestNameContains*"

Example -> ./gradlew :profile:testDebug --tests "*my_profile*" will run this test:

@Test
public void my_profile_pageview()

Additionally, running with --info flag helps to see the tests themselves or --debug for more output. e.g. ./gradlew --info :profile:testDebug --tests "*my_profile*"