Add unit tests for SettingsSlider widget.

Bug: 241857459
Test: unit tests
Change-Id: I80acdeaf08bb1078fc1d0f3dbe09569bd9c96d0b

packages/SettingsLib/Spa/gallery/src/com/android/settingslib/spa/gallery/page/SliderPage.kt

@@ -30,11 +30,11 @@ import androidx.compose.ui.tooling.preview.Preview
 import com.android.settingslib.spa.framework.api.SettingsPageProvider
 import com.android.settingslib.spa.framework.compose.navigator
 import com.android.settingslib.spa.framework.theme.SettingsTheme
+import com.android.settingslib.spa.widget.SettingsSlider
+import com.android.settingslib.spa.widget.SettingsSliderModel
 import com.android.settingslib.spa.widget.preference.Preference
 import com.android.settingslib.spa.widget.preference.PreferenceModel
 import com.android.settingslib.spa.widget.scaffold.RegularScaffold
-import com.android.settingslib.spa.widget.ui.SettingsSlider
-import com.android.settingslib.spa.widget.ui.SettingsSliderModel
 
 private const val TITLE = "Sample Slider"
 

packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/SettingsSlider.kt

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.android.settingslib.spa.widget.ui
+package com.android.settingslib.spa.widget
 
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.AccessAlarm

packages/SettingsLib/Spa/tests/src/com/android/settingslib/spa/widget/SettingsSliderTest.kt

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settingslib.spa.widget
+
+import androidx.compose.ui.test.assertIsDisplayed
+import androidx.compose.ui.test.junit4.createComposeRule
+import androidx.compose.ui.test.onNodeWithText
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class SettingsSliderTest {
+    @get:Rule
+    val composeTestRule = createComposeRule()
+
+    @Test
+    fun title_displayed() {
+        composeTestRule.setContent {
+            SettingsSlider(object : SettingsSliderModel {
+                override val title = "Slider"
+                override val initValue = 40
+            })
+        }
+
+        composeTestRule.onNodeWithText("Slider").assertIsDisplayed()
+    }
+
+    // TODO: Add more unit tests for SettingsSlider widget.
+}