Add Volume Panel tests

Bug: 318080198
Flag: aconfig new_volume_panel DISABLED
Test: atest BottombarViewModelTest
Test: atest ComponentsInteractorImplTest
Test: atest ComponentsFactoryTest
Test: atest VolumePanelViewModelTest
Test: atest DefaultComponentsLayoutManagerTest
Change-Id: I7929a8e8923bd9e1ae7bdc1d6b131a69b4a69c26

10 files changed, 626 insertions, 8 deletions

diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/component/bottombar/ui/viewmodel/BottomBarViewModelTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/component/bottombar/ui/viewmodel/BottomBarViewModelTest.kt
new file mode 100644
index 000000000000..471c8d851879
--- /dev/null
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/component/bottombar/ui/viewmodel/BottomBarViewModelTest.kt
@@ -0,0 +1,90 @@
+/*
+ * 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.systemui.volume.panel.component.bottombar.ui.viewmodel
+
+import android.content.Intent
+import android.provider.Settings
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.coroutines.collectLastValue
+import com.android.systemui.kosmos.testScope
+import com.android.systemui.plugins.activityStarter
+import com.android.systemui.testKosmos
+import com.android.systemui.util.mockito.capture
+import com.android.systemui.util.mockito.eq
+import com.android.systemui.volume.panel.volumePanelViewModel
+import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runCurrent
+import kotlinx.coroutines.test.runTest
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.ArgumentCaptor
+import org.mockito.Captor
+import org.mockito.Mockito.verify
+import org.mockito.junit.MockitoJUnit
+
+@OptIn(ExperimentalCoroutinesApi::class)
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+class BottomBarViewModelTest : SysuiTestCase() {
+
+    @JvmField @Rule var mockitoRule = MockitoJUnit.rule()
+
+    @Captor private lateinit var intentCaptor: ArgumentCaptor<Intent>
+
+    private val kosmos = testKosmos()
+
+    private lateinit var underTest: BottomBarViewModel
+
+    private fun initUnderTest() {
+        underTest = with(kosmos) { BottomBarViewModel(activityStarter, volumePanelViewModel) }
+    }
+
+    @Test
+    fun onDoneClicked_hidesPanel() {
+        with(kosmos) {
+            testScope.runTest {
+                initUnderTest()
+                underTest.onDoneClicked()
+                runCurrent()
+
+                val volumePanelState by collectLastValue(volumePanelViewModel.volumePanelState)
+                assertThat(volumePanelState!!.isVisible).isFalse()
+            }
+        }
+    }
+
+    @Test
+    fun onSettingsClicked_dismissesPanelAndNavigatesToSettings() {
+        with(kosmos) {
+            testScope.runTest {
+                initUnderTest()
+                underTest.onSettingsClicked()
+
+                runCurrent()
+
+                val volumePanelState by collectLastValue(volumePanelViewModel.volumePanelState)
+                assertThat(volumePanelState!!.isVisible).isFalse()
+                verify(activityStarter).startActivity(capture(intentCaptor), eq(true))
+                assertThat(intentCaptor.value.action).isEqualTo(Settings.ACTION_SOUND_SETTINGS)
+            }
+        }
+    }
+}
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/domain/interactor/ComponentsInteractorImplTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/domain/interactor/ComponentsInteractorImplTest.kt
new file mode 100644
index 000000000000..6256eece65dd
--- /dev/null
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/domain/interactor/ComponentsInteractorImplTest.kt
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2023 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.systemui.volume.panel.domain.interactor
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.coroutines.collectLastValue
+import com.android.systemui.kosmos.Kosmos
+import com.android.systemui.kosmos.testScope
+import com.android.systemui.volume.panel.availableCriteria
+import com.android.systemui.volume.panel.criteriaByKey
+import com.android.systemui.volume.panel.defaultCriteria
+import com.android.systemui.volume.panel.domain.model.ComponentModel
+import com.android.systemui.volume.panel.enabledComponents
+import com.android.systemui.volume.panel.shared.model.VolumePanelComponentKey
+import com.android.systemui.volume.panel.unavailableCriteria
+import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.test.runTest
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+class ComponentsInteractorImplTest : SysuiTestCase() {
+
+    private val kosmos = Kosmos()
+
+    private lateinit var underTest: ComponentsInteractor
+
+    private fun initUnderTest() {
+        underTest =
+            with(kosmos) {
+                ComponentsInteractorImpl(
+                    enabledComponents,
+                    defaultCriteria,
+                    testScope.backgroundScope,
+                    criteriaByKey,
+                )
+            }
+    }
+
+    @Test
+    fun componentsAvailability_checked() {
+        with(kosmos) {
+            testScope.runTest {
+                enabledComponents =
+                    setOf(
+                        BOTTOM_BAR,
+                        COMPONENT_1,
+                        COMPONENT_2,
+                    )
+                criteriaByKey =
+                    mapOf(
+                        BOTTOM_BAR to availableCriteria,
+                        COMPONENT_1 to unavailableCriteria,
+                        COMPONENT_2 to availableCriteria,
+                    )
+                initUnderTest()
+
+                val components by collectLastValue(underTest.components)
+
+                assertThat(components)
+                    .containsExactly(
+                        ComponentModel(BOTTOM_BAR, true),
+                        ComponentModel(COMPONENT_1, false),
+                        ComponentModel(COMPONENT_2, true),
+                    )
+            }
+        }
+    }
+
+    @Test
+    fun noCriteria_fallbackToDefaultCriteria() {
+        with(kosmos) {
+            testScope.runTest {
+                enabledComponents =
+                    setOf(
+                        BOTTOM_BAR,
+                        COMPONENT_1,
+                        COMPONENT_2,
+                    )
+                criteriaByKey =
+                    mapOf(
+                        BOTTOM_BAR to availableCriteria,
+                        COMPONENT_2 to availableCriteria,
+                    )
+                defaultCriteria = unavailableCriteria
+                initUnderTest()
+
+                val components by collectLastValue(underTest.components)
+
+                assertThat(components)
+                    .containsExactly(
+                        ComponentModel(BOTTOM_BAR, true),
+                        ComponentModel(COMPONENT_1, false),
+                        ComponentModel(COMPONENT_2, true),
+                    )
+            }
+        }
+    }
+
+    private companion object {
+        const val BOTTOM_BAR: VolumePanelComponentKey = "test_bottom_bar"
+        const val COMPONENT_1: VolumePanelComponentKey = "test_component:1"
+        const val COMPONENT_2: VolumePanelComponentKey = "test_component:2"
+    }
+}
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/ui/composable/ComponentsFactoryTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/ui/composable/ComponentsFactoryTest.kt
new file mode 100644
index 000000000000..3dbf23e3dc58
--- /dev/null
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/ui/composable/ComponentsFactoryTest.kt
@@ -0,0 +1,63 @@
+/*
+ * 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.systemui.volume.panel.ui.composable
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.testKosmos
+import com.android.systemui.volume.panel.componentByKey
+import com.android.systemui.volume.panel.mockVolumePanelUiComponentProvider
+import com.android.systemui.volume.panel.shared.model.VolumePanelComponentKey
+import com.google.common.truth.Truth
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+class ComponentsFactoryTest : SysuiTestCase() {
+
+    private val kosmos = testKosmos()
+
+    private lateinit var underTest: ComponentsFactory
+
+    private fun initUnderTest() {
+        underTest = ComponentsFactory(kosmos.componentByKey)
+    }
+
+    @Test
+    fun existingComponent_created() {
+        kosmos.componentByKey = mapOf(TEST_COMPONENT to kosmos.mockVolumePanelUiComponentProvider)
+        initUnderTest()
+
+        val component = underTest.createComponent(TEST_COMPONENT)
+
+        Truth.assertThat(component).isNotNull()
+    }
+
+    @Test(expected = IllegalArgumentException::class)
+    fun componentAbsence_throws() {
+        kosmos.componentByKey = emptyMap()
+        initUnderTest()
+
+        underTest.createComponent(TEST_COMPONENT)
+    }
+
+    private companion object {
+        const val TEST_COMPONENT: VolumePanelComponentKey = "test_component"
+    }
+}
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/ui/viewmodel/DefaultComponentsLayoutManagerTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/ui/viewmodel/DefaultComponentsLayoutManagerTest.kt
index e5fb9426e8e2..35d96989e35d 100644
--- a/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/ui/viewmodel/DefaultComponentsLayoutManagerTest.kt
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/ui/viewmodel/DefaultComponentsLayoutManagerTest.kt
@@ -16,7 +16,78 @@
 
 package com.android.systemui.volume.panel.ui.viewmodel
 
-class DefaultComponentsLayoutManagerTest {
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.testKosmos
+import com.android.systemui.volume.panel.mockVolumePanelUiComponent
+import com.android.systemui.volume.panel.shared.model.VolumePanelComponentKey
+import com.android.systemui.volume.panel.ui.layout.ComponentsLayoutManager
+import com.android.systemui.volume.panel.ui.layout.DefaultComponentsLayoutManager
+import com.google.common.truth.Truth
+import org.junit.Test
+import org.junit.runner.RunWith
 
-    // TODO(b/318080198) Write tests
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+class DefaultComponentsLayoutManagerTest : SysuiTestCase() {
+
+    private val kosmos = testKosmos()
+    private val underTest: ComponentsLayoutManager = DefaultComponentsLayoutManager()
+
+    @Test
+    fun bottomBar_isSet() {
+        val bottomBarComponentState =
+            ComponentState(BOTTOM_BAR, kosmos.mockVolumePanelUiComponent, false)
+        val layout =
+            underTest.layout(
+                VolumePanelState(0, false),
+                setOf(
+                    bottomBarComponentState,
+                    ComponentState(COMPONENT_1, kosmos.mockVolumePanelUiComponent, false),
+                    ComponentState(COMPONENT_2, kosmos.mockVolumePanelUiComponent, false),
+                )
+            )
+
+        Truth.assertThat(layout.bottomBarComponent).isEqualTo(bottomBarComponentState)
+    }
+
+    @Test
+    fun componentsAreInOrder() {
+        val bottomBarComponentState =
+            ComponentState(BOTTOM_BAR, kosmos.mockVolumePanelUiComponent, false)
+        val component1State = ComponentState(COMPONENT_1, kosmos.mockVolumePanelUiComponent, false)
+        val component2State = ComponentState(COMPONENT_2, kosmos.mockVolumePanelUiComponent, false)
+        val layout =
+            underTest.layout(
+                VolumePanelState(0, false),
+                setOf(
+                    bottomBarComponentState,
+                    component1State,
+                    component2State,
+                )
+            )
+
+        Truth.assertThat(layout.contentComponents[0]).isEqualTo(component1State)
+        Truth.assertThat(layout.contentComponents[1]).isEqualTo(component2State)
+    }
+
+    @Test(expected = IllegalStateException::class)
+    fun bottomBarAbsence_throwsException() {
+        val component1State = ComponentState(COMPONENT_1, kosmos.mockVolumePanelUiComponent, false)
+        val component2State = ComponentState(COMPONENT_2, kosmos.mockVolumePanelUiComponent, false)
+        underTest.layout(
+            VolumePanelState(0, false),
+            setOf(
+                component1State,
+                component2State,
+            )
+        )
+    }
+
+    private companion object {
+        const val BOTTOM_BAR: VolumePanelComponentKey = "bottom_bar"
+        const val COMPONENT_1: VolumePanelComponentKey = "test_component:1"
+        const val COMPONENT_2: VolumePanelComponentKey = "test_component:2"
+    }
 }
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/ui/viewmodel/VolumePanelViewModelTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/ui/viewmodel/VolumePanelViewModelTest.kt
index 9795237a3e7e..c4c9cc608afa 100644
--- a/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/ui/viewmodel/VolumePanelViewModelTest.kt
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/ui/viewmodel/VolumePanelViewModelTest.kt
@@ -16,7 +16,120 @@
 
 package com.android.systemui.volume.panel.ui.viewmodel
 
-class VolumePanelViewModelTest {
+import android.content.res.Configuration
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.coroutines.collectLastValue
+import com.android.systemui.kosmos.testScope
+import com.android.systemui.statusbar.policy.fakeConfigurationController
+import com.android.systemui.testKosmos
+import com.android.systemui.volume.panel.componentByKey
+import com.android.systemui.volume.panel.componentsLayoutManager
+import com.android.systemui.volume.panel.criteriaByKey
+import com.android.systemui.volume.panel.dagger.factory.KosmosVolumePanelComponentFactory
+import com.android.systemui.volume.panel.mockVolumePanelUiComponentProvider
+import com.android.systemui.volume.panel.shared.model.VolumePanelComponentKey
+import com.android.systemui.volume.panel.ui.layout.FakeComponentsLayoutManager
+import com.android.systemui.volume.panel.unavailableCriteria
+import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runCurrent
+import kotlinx.coroutines.test.runTest
+import org.junit.Test
+import org.junit.runner.RunWith
 
-    // TODO(b/318080198) Write tests
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+@OptIn(ExperimentalCoroutinesApi::class)
+class VolumePanelViewModelTest : SysuiTestCase() {
+
+    private val kosmos =
+        testKosmos().apply {
+            componentsLayoutManager = FakeComponentsLayoutManager { it.key == BOTTOM_BAR }
+        }
+
+    private val testableResources = context.orCreateTestableResources
+
+    private lateinit var underTest: VolumePanelViewModel
+
+    private fun initUnderTest() {
+        underTest =
+            VolumePanelViewModel(
+                testableResources.resources,
+                KosmosVolumePanelComponentFactory(kosmos),
+                kosmos.fakeConfigurationController,
+            )
+    }
+
+    @Test
+    fun dismissingPanel_changesVisibility() {
+        with(kosmos) {
+            testScope.runTest {
+                initUnderTest()
+                assertThat(underTest.volumePanelState.value.isVisible).isTrue()
+
+                underTest.dismissPanel()
+                runCurrent()
+
+                assertThat(underTest.volumePanelState.value.isVisible).isFalse()
+            }
+        }
+    }
+
+    @Test
+    fun orientationChanges_panelOrientationChanges() {
+        with(kosmos) {
+            testScope.runTest {
+                initUnderTest()
+                val volumePanelState by collectLastValue(underTest.volumePanelState)
+                testableResources.overrideConfiguration(
+                    Configuration().apply { orientation = Configuration.ORIENTATION_PORTRAIT }
+                )
+                assertThat(volumePanelState!!.orientation)
+                    .isEqualTo(Configuration.ORIENTATION_PORTRAIT)
+
+                fakeConfigurationController.onConfigurationChanged(
+                    Configuration().apply { orientation = Configuration.ORIENTATION_LANDSCAPE }
+                )
+                runCurrent()
+
+                assertThat(volumePanelState!!.orientation)
+                    .isEqualTo(Configuration.ORIENTATION_LANDSCAPE)
+            }
+        }
+    }
+
+    @Test
+    fun components_areReturned() {
+        with(kosmos) {
+            testScope.runTest {
+                componentByKey =
+                    mapOf(
+                        COMPONENT_1 to mockVolumePanelUiComponentProvider,
+                        COMPONENT_2 to mockVolumePanelUiComponentProvider,
+                        BOTTOM_BAR to mockVolumePanelUiComponentProvider,
+                    )
+                criteriaByKey = mapOf(COMPONENT_2 to unavailableCriteria)
+                initUnderTest()
+
+                val componentsLayout by collectLastValue(underTest.componentsLayout)
+                runCurrent()
+
+                assertThat(componentsLayout!!.contentComponents).hasSize(2)
+                assertThat(componentsLayout!!.contentComponents[0].key).isEqualTo(COMPONENT_1)
+                assertThat(componentsLayout!!.contentComponents[0].isVisible).isTrue()
+                assertThat(componentsLayout!!.contentComponents[1].key).isEqualTo(COMPONENT_2)
+                assertThat(componentsLayout!!.contentComponents[1].isVisible).isFalse()
+                assertThat(componentsLayout!!.bottomBarComponent.key).isEqualTo(BOTTOM_BAR)
+                assertThat(componentsLayout!!.bottomBarComponent.isVisible).isTrue()
+            }
+        }
+    }
+
+    private companion object {
+        const val BOTTOM_BAR: VolumePanelComponentKey = "test_bottom_bar"
+        const val COMPONENT_1: VolumePanelComponentKey = "test_component:1"
+        const val COMPONENT_2: VolumePanelComponentKey = "test_component:2"
+    }
 }
diff --git a/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/policy/ConfigurationControllerKosmos.kt b/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/policy/ConfigurationControllerKosmos.kt
index 18a2f9482df8..33ed7e61de4d 100644
--- a/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/policy/ConfigurationControllerKosmos.kt
+++ b/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/policy/ConfigurationControllerKosmos.kt
@@ -20,3 +20,5 @@ import com.android.systemui.kosmos.Kosmos
 import com.android.systemui.util.mockito.mock
 
 val Kosmos.configurationController by Kosmos.Fixture { mock<ConfigurationController>() }
+val Kosmos.fakeConfigurationController: FakeConfigurationController by
+    Kosmos.Fixture { FakeConfigurationController() }
diff --git a/packages/SystemUI/tests/utils/src/com/android/systemui/volume/panel/VolumePanelKosmos.kt b/packages/SystemUI/tests/utils/src/com/android/systemui/volume/panel/VolumePanelKosmos.kt
new file mode 100644
index 000000000000..d3410737a432
--- /dev/null
+++ b/packages/SystemUI/tests/utils/src/com/android/systemui/volume/panel/VolumePanelKosmos.kt
@@ -0,0 +1,72 @@
+/*
+ * 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.systemui.volume.panel
+
+import android.content.res.mainResources
+import com.android.systemui.kosmos.Kosmos
+import com.android.systemui.kosmos.testScope
+import com.android.systemui.statusbar.policy.fakeConfigurationController
+import com.android.systemui.util.mockito.mock
+import com.android.systemui.volume.panel.dagger.factory.KosmosVolumePanelComponentFactory
+import com.android.systemui.volume.panel.domain.ComponentAvailabilityCriteria
+import com.android.systemui.volume.panel.domain.TestComponentAvailabilityCriteria
+import com.android.systemui.volume.panel.domain.interactor.ComponentsInteractor
+import com.android.systemui.volume.panel.domain.interactor.ComponentsInteractorImpl
+import com.android.systemui.volume.panel.shared.model.VolumePanelComponentKey
+import com.android.systemui.volume.panel.shared.model.VolumePanelUiComponent
+import com.android.systemui.volume.panel.ui.composable.ComponentsFactory
+import com.android.systemui.volume.panel.ui.layout.ComponentsLayoutManager
+import com.android.systemui.volume.panel.ui.viewmodel.VolumePanelViewModel
+import javax.inject.Provider
+
+val Kosmos.mockVolumePanelUiComponent: VolumePanelUiComponent by Kosmos.Fixture { mock {} }
+val Kosmos.mockVolumePanelUiComponentProvider: Provider<VolumePanelUiComponent> by
+    Kosmos.Fixture { Provider { mockVolumePanelUiComponent } }
+var Kosmos.componentByKey: Map<VolumePanelComponentKey, Provider<VolumePanelUiComponent>> by
+    Kosmos.Fixture { emptyMap() }
+val Kosmos.componentsFactory: ComponentsFactory by
+    Kosmos.Fixture { ComponentsFactory(componentByKey) }
+
+var Kosmos.componentsLayoutManager: ComponentsLayoutManager by Kosmos.Fixture()
+var Kosmos.enabledComponents: Collection<VolumePanelComponentKey> by
+    Kosmos.Fixture { componentByKey.keys }
+val Kosmos.unavailableCriteria: Provider<ComponentAvailabilityCriteria> by
+    Kosmos.Fixture { Provider { TestComponentAvailabilityCriteria(false) } }
+val Kosmos.availableCriteria: Provider<ComponentAvailabilityCriteria> by
+    Kosmos.Fixture { Provider { TestComponentAvailabilityCriteria(true) } }
+var Kosmos.defaultCriteria: Provider<ComponentAvailabilityCriteria> by
+    Kosmos.Fixture { availableCriteria }
+var Kosmos.criteriaByKey: Map<VolumePanelComponentKey, Provider<ComponentAvailabilityCriteria>> by
+    Kosmos.Fixture { emptyMap() }
+var Kosmos.componentsInteractor: ComponentsInteractor by
+    Kosmos.Fixture {
+        ComponentsInteractorImpl(
+            enabledComponents,
+            defaultCriteria,
+            testScope.backgroundScope,
+            criteriaByKey,
+        )
+    }
+
+var Kosmos.volumePanelViewModel: VolumePanelViewModel by
+    Kosmos.Fixture {
+        VolumePanelViewModel(
+            mainResources,
+            KosmosVolumePanelComponentFactory(this),
+            fakeConfigurationController,
+        )
+    }
diff --git a/packages/SystemUI/tests/utils/src/com/android/systemui/volume/panel/dagger/factory/KosmosVolumePanelComponentFactory.kt b/packages/SystemUI/tests/utils/src/com/android/systemui/volume/panel/dagger/factory/KosmosVolumePanelComponentFactory.kt
new file mode 100644
index 000000000000..49041ed0d652
--- /dev/null
+++ b/packages/SystemUI/tests/utils/src/com/android/systemui/volume/panel/dagger/factory/KosmosVolumePanelComponentFactory.kt
@@ -0,0 +1,45 @@
+/*
+ * 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.systemui.volume.panel.dagger.factory
+
+import com.android.systemui.kosmos.Kosmos
+import com.android.systemui.kosmos.testScope
+import com.android.systemui.volume.panel.componentsFactory
+import com.android.systemui.volume.panel.componentsInteractor
+import com.android.systemui.volume.panel.componentsLayoutManager
+import com.android.systemui.volume.panel.dagger.VolumePanelComponent
+import com.android.systemui.volume.panel.domain.interactor.ComponentsInteractor
+import com.android.systemui.volume.panel.ui.composable.ComponentsFactory
+import com.android.systemui.volume.panel.ui.layout.ComponentsLayoutManager
+import com.android.systemui.volume.panel.ui.viewmodel.VolumePanelViewModel
+import kotlinx.coroutines.CoroutineScope
+
+class KosmosVolumePanelComponentFactory(private val kosmos: Kosmos) : VolumePanelComponentFactory {
+
+    override fun create(viewModel: VolumePanelViewModel): VolumePanelComponent =
+        object : VolumePanelComponent {
+
+            override fun coroutineScope(): CoroutineScope = kosmos.testScope.backgroundScope
+
+            override fun componentsInteractor(): ComponentsInteractor = kosmos.componentsInteractor
+
+            override fun componentsFactory(): ComponentsFactory = kosmos.componentsFactory
+
+            override fun componentsLayoutManager(): ComponentsLayoutManager =
+                kosmos.componentsLayoutManager
+        }
+}
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/domain/interactor/ComponentsInteractorTest.kt b/packages/SystemUI/tests/utils/src/com/android/systemui/volume/panel/domain/TestComponentAvailabilityCriteria.kt
index dbff63f355c8..5ab92745ae69 100644
--- a/packages/SystemUI/multivalentTests/src/com/android/systemui/volume/panel/domain/interactor/ComponentsInteractorTest.kt
+++ b/packages/SystemUI/tests/utils/src/com/android/systemui/volume/panel/domain/TestComponentAvailabilityCriteria.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2023 The Android Open Source Project
+ * 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.
@@ -14,9 +14,12 @@
  * limitations under the License.
  */
 
-package com.android.systemui.volume.panel.domain.interactor
+package com.android.systemui.volume.panel.domain
 
-class ComponentsInteractorTest {
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.flowOf
 
-    // TODO(b/318080198) Write tests
+class TestComponentAvailabilityCriteria(val isAvailable: Boolean) : ComponentAvailabilityCriteria {
+
+    override fun isAvailable(): Flow<Boolean> = flowOf(isAvailable)
 }
diff --git a/packages/SystemUI/tests/utils/src/com/android/systemui/volume/panel/ui/layout/FakeComponentsLayoutManager.kt b/packages/SystemUI/tests/utils/src/com/android/systemui/volume/panel/ui/layout/FakeComponentsLayoutManager.kt
new file mode 100644
index 000000000000..655d8f7ad952
--- /dev/null
+++ b/packages/SystemUI/tests/utils/src/com/android/systemui/volume/panel/ui/layout/FakeComponentsLayoutManager.kt
@@ -0,0 +1,37 @@
+/*
+ * 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.systemui.volume.panel.ui.layout
+
+import com.android.systemui.volume.panel.ui.viewmodel.ComponentState
+import com.android.systemui.volume.panel.ui.viewmodel.VolumePanelState
+
+class FakeComponentsLayoutManager(
+    private val isBottomBar: (components: ComponentState) -> Boolean
+) : ComponentsLayoutManager {
+
+    override fun layout(
+        volumePanelState: VolumePanelState,
+        components: Collection<ComponentState>
+    ): ComponentsLayout {
+        return ComponentsLayout(
+            components
+                .filter { componentState -> !isBottomBar(componentState) }
+                .sortedBy { it.key },
+            components.find(isBottomBar)!!,
+        )
+    }
+}