Remove loading from screenshot tests

app/src/testDemo/kotlin/com/google/samples/apps/nowinandroid/ui/SnackbarScreenshotTests.kt

@@ -22,7 +22,9 @@ import androidx.compose.material3.SnackbarDuration.Indefinite
 import androidx.compose.material3.SnackbarHostState
 import androidx.compose.material3.windowsizeclass.ExperimentalMaterial3WindowSizeClassApi
 import androidx.compose.material3.windowsizeclass.WindowSizeClass
+import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.ui.platform.LocalInspectionMode
 import androidx.compose.ui.test.DeviceConfigurationOverride
 import androidx.compose.ui.test.ForcedSize
 import androidx.compose.ui.test.junit4.createAndroidComposeRule
@@ -60,6 +62,7 @@ import org.robolectric.RobolectricTestRunner
 import org.robolectric.annotation.Config
 import org.robolectric.annotation.GraphicsMode
 import org.robolectric.annotation.LooperMode
+import java.util.TimeZone
 import javax.inject.Inject
 
 /**
@@ -135,6 +138,12 @@ class SnackbarScreenshotTests {
         }
     }
 
+    @Before
+    fun setTimeZone() {
+        // Make time zone deterministic in tests
+        TimeZone.setDefault(TimeZone.getTimeZone("UTC"))
+    }
+
     @Test
     fun phone_noSnackbar() {
         val snackbarHostState = SnackbarHostState()
@@ -207,22 +216,26 @@ class SnackbarScreenshotTests {
     ) {
         lateinit var scope: CoroutineScope
         composeTestRule.setContent {
-            scope = rememberCoroutineScope()
-
-            DeviceConfigurationOverride(
-                DeviceConfigurationOverride.ForcedSize(DpSize(width, height)),
+            CompositionLocalProvider(
+                LocalInspectionMode provides true,
             ) {
-                BoxWithConstraints {
-                    val appState = rememberNiaAppState(
-                        windowSizeClass = WindowSizeClass.calculateFromSize(
-                            DpSize(maxWidth, maxHeight),
-                        ),
-                        networkMonitor = networkMonitor,
-                        userNewsResourceRepository = userNewsResourceRepository,
-                        timeZoneMonitor = timeZoneMonitor,
-                    )
-                    NiaTheme {
-                        NiaApp(appState, snackbarHostState, false, {}, {})
+                scope = rememberCoroutineScope()
+
+                DeviceConfigurationOverride(
+                    DeviceConfigurationOverride.ForcedSize(DpSize(width, height)),
+                ) {
+                    BoxWithConstraints {
+                        val appState = rememberNiaAppState(
+                            windowSizeClass = WindowSizeClass.calculateFromSize(
+                                DpSize(maxWidth, maxHeight),
+                            ),
+                            networkMonitor = networkMonitor,
+                            userNewsResourceRepository = userNewsResourceRepository,
+                            timeZoneMonitor = timeZoneMonitor,
+                        )
+                        NiaTheme {
+                            NiaApp(appState, snackbarHostState, false, {}, {})
+                        }
                     }
                 }
             }