Add libraries/emoji/test module with picker fakes

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