Add libraries/emoji/test module with picker fakes

features/messages/impl/build.gradle.kts

@@ -107,5 +107,6 @@ dependencies {
     testImplementation(projects.features.poll.test)
     testImplementation(projects.libraries.eventformatter.test)
     testImplementation(projects.libraries.emoji.impl)
+    testImplementation(projects.libraries.emoji.test)
     testImplementation(projects.libraries.slashcommands.test)
 }

features/messages/impl/src/test/kotlin/io/element/android/features/messages/impl/timeline/components/customreaction/CustomReactionPresenterTest.kt

@@ -11,9 +11,8 @@ package io.element.android.features.messages.impl.timeline.components.customreac
 import com.google.common.truth.Truth.assertThat
 import io.element.android.features.messages.impl.timeline.aTimelineItemEvent
 import io.element.android.features.messages.impl.timeline.aTimelineItemReactions
-import io.element.android.libraries.emoji.api.picker.EmojiPickerPresenter
 import io.element.android.libraries.emoji.api.recentemojis.EmptyGetRecentEmojis
-import io.element.android.libraries.emoji.impl.picker.anEmojiPickerState
+import io.element.android.libraries.emoji.test.fakeEmojiPickerPresenterFactory
 import io.element.android.libraries.matrix.test.AN_EVENT_ID
 import io.element.android.tests.testutils.WarmUpRule
 import io.element.android.tests.testutils.test
@@ -26,7 +25,7 @@ class CustomReactionPresenterTest {
     val warmUpRule = WarmUpRule()
 
     private val presenter = CustomReactionPresenter(
-        emojiPickerPresenterFactory = EmojiPickerPresenter.Factory { EmojiPickerPresenter { anEmojiPickerState() } },
+        emojiPickerPresenterFactory = fakeEmojiPickerPresenterFactory(),
         getRecentEmojis = EmptyGetRecentEmojis,
     )
 

libraries/emoji/test/build.gradle.kts

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2026 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+plugins {
+    id("io.element.android-compose-library")
+}
+
+android {
+    namespace = "io.element.android.libraries.emoji.test"
+}
+
+dependencies {
+    api(projects.libraries.emoji.api)
+    implementation(projects.libraries.architecture)
+}

libraries/emoji/test/src/main/kotlin/io/element/android/libraries/emoji/test/FakeEmojiPickerPresenter.kt

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2026 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.libraries.emoji.test
+
+import io.element.android.libraries.emoji.api.picker.EmojiPickerPresenter
+import io.element.android.libraries.emoji.api.picker.EmojiPickerState
+
+fun fakeEmojiPickerPresenter(
+    state: EmojiPickerState = FakeEmojiPickerState(),
+): EmojiPickerPresenter = EmojiPickerPresenter { state }
+
+fun fakeEmojiPickerPresenterFactory(
+    presenter: EmojiPickerPresenter = fakeEmojiPickerPresenter(),
+): EmojiPickerPresenter.Factory = EmojiPickerPresenter.Factory { presenter }

libraries/emoji/test/src/main/kotlin/io/element/android/libraries/emoji/test/FakeEmojiPickerState.kt

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2026 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.libraries.emoji.test
+
+import io.element.android.libraries.emoji.api.picker.EmojiPickerState
+
+/**
+ * Minimal [EmojiPickerState] for use in tests that don't render the picker (typically presenter
+ * tests).
+ */
+data class FakeEmojiPickerState(
+    override val isReady: Boolean = true,
+) : EmojiPickerState