Migrate GetCharactersPageUseCaseTest to runTest and add kotlinx-coroutines-test dependency to domain module.

build-logic/convention/src/main/kotlin/com/example/architecture/convention/DomainModuleConventionPlugin.kt

@@ -20,8 +20,10 @@ class DomainModuleConventionPlugin : Plugin<Project> {
             add("implementation", libs.findLibrary("kotlinx-coroutines-core").get())
             add("testImplementation", libs.findLibrary("junit-jupiter-api").get())
             add("testImplementation", libs.findLibrary("assertk").get())
-            // Domain doesn't consume the `unit-test` bundle, so MockK is added explicitly here.
+            // Domain doesn't consume the `unit-test` bundle, so MockK and the coroutines
+            // test artifact are added explicitly here.
             add("testImplementation", libs.findLibrary("mockk").get())
+            add("testImplementation", libs.findLibrary("kotlinx-coroutines-test").get())
             add("testRuntimeOnly", libs.findLibrary("junit-jupiter-engine").get())
             // Gradle 9 dropped the bundled launcher; JUnit 5 won't start without it.
             add("testRuntimeOnly", libs.findLibrary("junit-platform-launcher").get())

feature/characters/domain/src/test/kotlin/com/example/architecture/feature/characters/domain/usecase/GetCharactersPageUseCaseTest.kt

@@ -12,7 +12,7 @@ import com.example.architecture.feature.characters.domain.model.CharactersPage
 import io.mockk.coEvery
 import io.mockk.coVerify
 import io.mockk.mockk
-import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.test.runTest
 import org.junit.jupiter.api.Test
 
 /**
@@ -27,7 +27,7 @@ class GetCharactersPageUseCaseTest {
     private val useCase = GetCharactersPageUseCase(repository)
 
     @Test
-    fun `returns the repository page on success`() = runBlocking {
+    fun `returns the repository page on success`() = runTest {
         val page = CharactersPage(characters = listOf(domainCharacter(1)), nextPage = 2)
         coEvery { repository.getCharacters(1) } returns Result.Success(page)
 
@@ -37,7 +37,7 @@ class GetCharactersPageUseCaseTest {
     }
 
     @Test
-    fun `propagates the repository error`() = runBlocking {
+    fun `propagates the repository error`() = runTest {
         coEvery { repository.getCharacters(1) } returns Result.Error(DataError.Network.SERVER_ERROR)
 
         val result = useCase(page = 1)
@@ -47,7 +47,7 @@ class GetCharactersPageUseCaseTest {
     }
 
     @Test
-    fun `forwards the requested page number`() = runBlocking {
+    fun `forwards the requested page number`() = runTest {
         coEvery { repository.getCharacters(any()) } returns
             Result.Success(CharactersPage(characters = emptyList(), nextPage = null))