test(planet-selection): add unit tests forPlanetSelectionScreen compo…

…sable

app/src/androidTest/java/com/github/lookupgroup27/lookup/ui/planetselection/PlanetSelectionScreenTest.kt

@@ -0,0 +1,79 @@
+package com.github.lookupgroup27.lookup.ui.planetselection
+
+import androidx.compose.ui.test.*
+import androidx.compose.ui.test.junit4.createComposeRule
+import com.github.lookupgroup27.lookup.model.map.planets.PlanetsRepository
+import com.github.lookupgroup27.lookup.ui.navigation.NavigationActions
+import com.github.lookupgroup27.lookup.ui.navigation.Screen
+import io.mockk.*
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+
+class PlanetSelectionScreenTest {
+
+  @get:Rule val composeTestRule = createComposeRule()
+
+  private lateinit var viewModel: PlanetSelectionViewModel
+  private lateinit var navigationActions: NavigationActions
+  private lateinit var planetsRepository: PlanetsRepository
+
+  @Before
+  fun setUp() {
+
+    planetsRepository = PlanetsRepository(mockk(), mockk(), "")
+
+    // Mock the ViewModel with PlanetsRepository
+    viewModel = spyk(PlanetSelectionViewModel(planetsRepository))
+
+    // Mock NavigationActions
+    navigationActions = mockk(relaxed = true)
+  }
+
+  @Test
+  fun testBackButtonNavigatesToMenu() {
+    composeTestRule.setContent {
+      PlanetSelectionScreen(viewModel = viewModel, navigationActions = navigationActions)
+    }
+
+    composeTestRule.onNodeWithTag("go_back_button").performClick()
+
+    verify { navigationActions.navigateTo(Screen.MENU) }
+  }
+
+  @Test
+  fun testPlanetSelectionUpdatesPlanetName() {
+    composeTestRule.setContent {
+      PlanetSelectionScreen(viewModel = viewModel, navigationActions = navigationActions)
+    }
+
+    // Select Mars
+    composeTestRule.onNodeWithContentDescription("Mars button").performClick()
+
+    // Check if the planet name is updated
+    composeTestRule.onNodeWithTag("planet_name").assertTextEquals("Mars")
+  }
+
+  @Test
+  fun testInitialPlanetDisplayedCorrectly() {
+    composeTestRule.setContent {
+      PlanetSelectionScreen(viewModel = viewModel, navigationActions = navigationActions)
+    }
+
+    // Check if the initially selected planet (Moon) is displayed
+    composeTestRule.onNodeWithTag("planet_name").assertTextEquals("Moon")
+  }
+
+  @Test
+  fun testPlanetSurfaceViewUpdatesOnPlanetChange() {
+    composeTestRule.setContent {
+      PlanetSelectionScreen(viewModel = viewModel, navigationActions = navigationActions)
+    }
+
+    // Select Jupiter
+    composeTestRule.onNodeWithContentDescription("Jupiter button").performClick()
+
+    // Verify if the planet name is updated to Jupiter
+    composeTestRule.onNodeWithTag("planet_name").assertTextEquals("Jupiter")
+  }
+}

app/src/main/java/com/github/lookupgroup27/lookup/ui/planetselection/PlanetSelectionScreen.kt

@@ -66,7 +66,10 @@ fun PlanetSelectionScreen(
               color = White,
               fontSize = 50.sp,
               fontWeight = FontWeight.Light,
-              modifier = Modifier.padding(20.dp).align(Alignment.CenterHorizontally))
+              modifier =
+                  Modifier.padding(20.dp)
+                      .align(Alignment.CenterHorizontally)
+                      .testTag("planet_name"))
         }
       },
       content = {