diff --git a/tests/multivalentTests/src/com/android/launcher3/util/SystemUiControllerTest.kt b/tests/multivalentTests/src/com/android/launcher3/util/SystemUiControllerTest.kt
new file mode 100644
index 0000000..612fcd4
--- /dev/null
+++ b/tests/multivalentTests/src/com/android/launcher3/util/SystemUiControllerTest.kt
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2024 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.launcher3.util
+
+import android.view.View
+import android.view.View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+import android.view.Window
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.android.launcher3.util.SystemUiController.FLAG_DARK_NAV
+import com.android.launcher3.util.SystemUiController.FLAG_DARK_STATUS
+import com.android.launcher3.util.SystemUiController.FLAG_LIGHT_NAV
+import com.android.launcher3.util.SystemUiController.FLAG_LIGHT_STATUS
+import com.android.launcher3.util.SystemUiController.UI_STATE_BASE_WINDOW
+import com.android.launcher3.util.SystemUiController.UI_STATE_SCRIM_VIEW
+import com.google.common.truth.Truth.assertThat
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.ArgumentMatchers.anyInt
+import org.mockito.ArgumentMatchers.eq
+import org.mockito.Mock
+import org.mockito.Mockito.never
+import org.mockito.Mockito.verify
+import org.mockito.Mockito.`when`
+import org.mockito.MockitoAnnotations
+
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+class SystemUiControllerTest {
+
+    @Mock private lateinit var window: Window
+    @Mock private lateinit var decorView: View
+
+    private lateinit var underTest: SystemUiController
+
+    @Before
+    fun setup() {
+        MockitoAnnotations.initMocks(this)
+        `when`(window.decorView).thenReturn(decorView)
+        underTest = SystemUiController(window)
+    }
+
+    @Test
+    fun test_default_state() {
+        assertThat(underTest.toString()).isEqualTo("mStates=[0, 0, 0, 0, 0]")
+    }
+
+    @Test
+    fun update_state_base_window_light() {
+        underTest.updateUiState(UI_STATE_BASE_WINDOW, /* isLight= */ true)
+
+        val visibility =
+            View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR or View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
+        verify(decorView).systemUiVisibility = eq(visibility)
+        assertThat(underTest.baseSysuiVisibility).isEqualTo(visibility)
+        val flag = FLAG_LIGHT_NAV or FLAG_LIGHT_STATUS
+        assertThat(underTest.toString()).isEqualTo("mStates=[$flag, 0, 0, 0, 0]")
+    }
+
+    @Test
+    fun update_state_scrim_view_light() {
+        underTest.updateUiState(UI_STATE_SCRIM_VIEW, /* isLight= */ true)
+
+        verify(decorView).systemUiVisibility =
+            eq(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR or View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR)
+        assertThat(underTest.baseSysuiVisibility).isEqualTo(0)
+        val flag = FLAG_LIGHT_NAV or FLAG_LIGHT_STATUS
+        assertThat(underTest.toString()).isEqualTo("mStates=[0, $flag, 0, 0, 0]")
+    }
+
+    @Test
+    fun update_state_base_window_dark() {
+        underTest.updateUiState(UI_STATE_BASE_WINDOW, /* isLight= */ false)
+
+        verify(decorView, never()).systemUiVisibility = anyInt()
+        assertThat(underTest.baseSysuiVisibility).isEqualTo(0)
+        val flag = FLAG_DARK_NAV or FLAG_DARK_STATUS
+        assertThat(underTest.toString()).isEqualTo("mStates=[$flag, 0, 0, 0, 0]")
+    }
+
+    @Test
+    fun update_state_scrim_view_dark() {
+        underTest.updateUiState(UI_STATE_SCRIM_VIEW, /* isLight= */ false)
+
+        verify(decorView, never()).systemUiVisibility = anyInt()
+        assertThat(underTest.baseSysuiVisibility).isEqualTo(0)
+        val flag = FLAG_DARK_NAV or FLAG_DARK_STATUS
+        assertThat(underTest.toString()).isEqualTo("mStates=[0, $flag, 0, 0, 0]")
+    }
+
+    @Test
+    fun get_base_sysui_visibility() {
+        `when`(decorView.systemUiVisibility).thenReturn(SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN)
+
+        assertThat(underTest.baseSysuiVisibility).isEqualTo(SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN)
+    }
+
+    @Test
+    fun update_state_base_window_light_with_existing_visibility() {
+        `when`(decorView.systemUiVisibility).thenReturn(SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN)
+
+        underTest.updateUiState(UI_STATE_BASE_WINDOW, /* isLight= */ true)
+
+        val visibility =
+            View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR or
+                View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR or
+                SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+        assertThat(underTest.baseSysuiVisibility).isEqualTo(visibility)
+        verify(decorView).systemUiVisibility = eq(visibility)
+    }
+}