Add SavedState UI Test for Common Target

eungabi/src/desktopTest/kotlin/com/easternkite/eungabi/navigation/EunGabiSavedStateTest.kt

@@ -0,0 +1,66 @@
+package com.easternkite.eungabi.navigation
+
+import androidx.compose.material3.Button
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.test.ExperimentalTestApi
+import androidx.compose.ui.test.assertTextEquals
+import androidx.compose.ui.test.onNodeWithTag
+import androidx.compose.ui.test.performClick
+import androidx.compose.ui.test.runComposeUiTest
+import androidx.lifecycle.SavedStateHandle
+import androidx.lifecycle.ViewModel
+import kotlin.test.Test
+
+class EunGabiSavedStateTest {
+    @OptIn(ExperimentalTestApi::class)
+    @Test
+    fun savedStateTest() =
+        runComposeUiTest {
+            setContent {
+                HiltNavHost()
+            }
+            waitForIdle()
+            onNodeWithTag("MainButton").performClick()
+            waitForIdle()
+            onNodeWithTag("state").assertTextEquals("SecondState")
+        }
+}
+
+@Composable
+fun HiltNavHost(modifier: Modifier = Modifier) {
+    val controller = rememberEunGabiController()
+    EunGabiNavHost(
+        modifier = modifier,
+        controller = controller,
+        startDestination = "Main"
+    ) {
+        composable("Main") {
+            Button(
+                onClick = { controller.navigate("Second?state=SecondState") },
+                modifier = Modifier.testTag("MainButton")
+            ) {
+                Text("Main")
+            }
+        }
+        composable("Second") {
+            HiltView()
+        }
+    }
+}
+
+@Composable
+fun HiltView(viewModel: TestSavedStateViewModel = eunGabiViewModel { TestSavedStateViewModel(it) }) {
+    val state by viewModel.state.collectAsState()
+    Text(text = state, modifier = Modifier.testTag("state"))
+}
+
+class TestSavedStateViewModel(
+    savedStateHandle: SavedStateHandle
+) : ViewModel() {
+    val state = savedStateHandle.getStateFlow("state", "state")
+}