review: Add unit test for notificationFormater

libraries/eventformatter/impl/src/test/kotlin/io/element/android/libraries/eventformatter/impl/RtcNotificationContentFormatterTest.kt

@@ -0,0 +1,99 @@
+/*
+ * 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.eventformatter.impl
+
+import android.content.Context
+import com.google.common.truth.Truth.assertThat
+import io.element.android.libraries.matrix.api.notification.CallIntent
+import io.element.android.libraries.matrix.api.timeline.item.event.CallNotifyContent
+import io.element.android.libraries.matrix.test.A_USER_ID_2
+import io.element.android.libraries.matrix.test.A_USER_ID_3
+import io.element.android.libraries.matrix.test.FakeMatrixClient
+import io.element.android.services.toolbox.impl.strings.AndroidStringProvider
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.RuntimeEnvironment
+import org.robolectric.annotation.Config
+import kotlin.toString
+
+@Suppress("LargeClass")
+@RunWith(RobolectricTestRunner::class)
+class RtcNotificationContentFormatterTest {
+    private lateinit var context: Context
+    private lateinit var fakeMatrixClient: FakeMatrixClient
+    private lateinit var formatter: RtcNotificationContentFormatter
+
+    @Before
+    fun setup() {
+        context = RuntimeEnvironment.getApplication() as Context
+        fakeMatrixClient = FakeMatrixClient()
+        val stringProvider = AndroidStringProvider(context.resources)
+        formatter = RtcNotificationContentFormatter(
+            fakeMatrixClient,
+            stringProvider
+        )
+    }
+
+    @Test
+    @Config(qualifiers = "en")
+    fun `Should not display declined info in rooms`() {
+        val result = formatter.format(
+            CallNotifyContent(
+                CallIntent.VIDEO,
+                declinedBy = listOf(A_USER_ID_2, A_USER_ID_3)
+            ),
+            false
+        )
+        val expected = "Call started"
+        assertThat(result.toString()).isEqualTo(expected)
+    }
+
+    @Test
+    @Config(qualifiers = "en")
+    fun `Declined by me variant`() {
+        val result = formatter.format(
+            CallNotifyContent(
+                CallIntent.VIDEO,
+                declinedBy = listOf(fakeMatrixClient.sessionId)
+            ),
+            true
+        )
+        val expected = "You declined a call"
+        assertThat(result.toString()).isEqualTo(expected)
+    }
+
+    @Test
+    @Config(qualifiers = "en")
+    fun `Declined by other variant`() {
+        val result = formatter.format(
+            CallNotifyContent(
+                CallIntent.VIDEO,
+                declinedBy = listOf(A_USER_ID_2)
+            ),
+            true
+        )
+        val expected = "Call declined"
+        assertThat(result.toString()).isEqualTo(expected)
+    }
+
+    @Test
+    @Config(qualifiers = "en")
+    fun `Call started in DM`() {
+        val result = formatter.format(
+            CallNotifyContent(
+                CallIntent.AUDIO,
+                declinedBy = listOf()
+            ),
+            true
+        )
+        val expected = "Call started"
+        assertThat(result.toString()).isEqualTo(expected)
+    }
+}