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Fix tests.

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This commit is contained in:
Benoit Marty
2024-05-15 11:55:08 +02:00
parent eb32773434
commit d689c778c6
4 changed files with 100 additions and 114 deletions
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20
features/roomdetails/impl/src/test/kotlin/io/element/android/features/roomdetails/MatrixRoomFixture.kt
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@@ -21,16 +21,19 @@ import io.element.android.libraries.matrix.test.A_ROOM_ID
import io.element.android.libraries.matrix.test.A_ROOM_NAME
import io.element.android.libraries.matrix.test.notificationsettings.FakeNotificationSettingsService
import io.element.android.libraries.matrix.test.room.FakeMatrixRoom
import io.element.android.libraries.matrix.test.room.aRoomInfo
fun aMatrixRoom(
roomId: RoomId = A_ROOM_ID,
displayName: String = A_ROOM_NAME,
rawName: String? = displayName,
topic: String? = "A topic",
avatarUrl: String? = "https://matrix.org/avatar.jpg",
isEncrypted: Boolean = true,
isPublic: Boolean = true,
isDirect: Boolean = false,
notificationSettingsService: FakeNotificationSettingsService = FakeNotificationSettingsService()
notificationSettingsService: FakeNotificationSettingsService = FakeNotificationSettingsService(),
emitRoomInfo: Boolean = false,
) = FakeMatrixRoom(
roomId = roomId,
displayName = displayName,
@@ -40,4 +43,17 @@ fun aMatrixRoom(
isPublic = isPublic,
isDirect = isDirect,
notificationSettingsService = notificationSettingsService
)
).apply {
if (emitRoomInfo) {
givenRoomInfo(
aRoomInfo(
name = displayName,
rawName = rawName,
topic = topic,
avatarUrl = avatarUrl,
isDirect = isDirect,
isPublic = isPublic,
)
)
}
}

1
features/roomdetails/impl/src/test/kotlin/io/element/android/features/roomdetails/RoomDetailsPresenterTests.kt
View File

@@ -470,4 +470,3 @@ class RoomDetailsPresenterTests {
}
}
}

192
features/roomdetails/impl/src/test/kotlin/io/element/android/features/roomdetails/edit/RoomDetailsEditPresenterTest.kt
View File

@@ -19,6 +19,7 @@ package io.element.android.features.roomdetails.edit
import android.net.Uri
import app.cash.molecule.RecompositionMode
import app.cash.molecule.moleculeFlow
import app.cash.turbine.ReceiveTurbine
import app.cash.turbine.test
import com.google.common.truth.Truth.assertThat
import io.element.android.features.roomdetails.aMatrixRoom
@@ -28,7 +29,8 @@ import io.element.android.libraries.architecture.AsyncAction
import io.element.android.libraries.matrix.api.room.MatrixRoom
import io.element.android.libraries.matrix.api.room.StateEventType
import io.element.android.libraries.matrix.test.AN_AVATAR_URL
import io.element.android.libraries.matrix.test.room.aRoomInfo
import io.element.android.libraries.matrix.test.A_ROOM_NAME
import io.element.android.libraries.matrix.test.A_ROOM_RAW_NAME
import io.element.android.libraries.matrix.ui.media.AvatarAction
import io.element.android.libraries.mediapickers.test.FakePickerProvider
import io.element.android.libraries.mediaupload.api.MediaUploadInfo
@@ -93,23 +95,17 @@ class RoomDetailsEditPresenterTest {
fun `present - initial state is created from room info`() = runTest {
val room = aMatrixRoom(
avatarUrl = AN_AVATAR_URL,
displayName = "a display name",
).also {
it.givenRoomInfo(
aRoomInfo(
name = "a display name",
rawName = "a raw name",
)
)
}
displayName = A_ROOM_NAME,
rawName = A_ROOM_RAW_NAME,
emitRoomInfo = true,
)
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
val initialState = awaitItem()
val initialState = awaitFirstItem()
assertThat(initialState.roomId).isEqualTo(room.roomId)
assertThat(initialState.roomRawName).isEqualTo("a raw name")
assertThat(initialState.roomRawName).isEqualTo(A_ROOM_RAW_NAME)
assertThat(initialState.roomAvatarUrl).isEqualTo(roomAvatarUri)
assertThat(initialState.roomTopic).isEqualTo(room.topic.orEmpty())
assertThat(initialState.avatarActions).containsExactly(
@@ -130,7 +126,6 @@ class RoomDetailsEditPresenterTest {
givenCanSendStateResult(StateEventType.ROOM_TOPIC, Result.failure(Throwable("Oops")))
}
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
@@ -139,7 +134,6 @@ class RoomDetailsEditPresenterTest {
assertThat(initialState.canChangeName).isFalse()
assertThat(initialState.canChangeAvatar).isFalse()
assertThat(initialState.canChangeTopic).isFalse()
// When the asynchronous check completes, the single field we can edit is true
val settledState = awaitItem()
assertThat(settledState.canChangeName).isTrue()
@@ -156,7 +150,6 @@ class RoomDetailsEditPresenterTest {
givenCanSendStateResult(StateEventType.ROOM_TOPIC, Result.failure(Throwable("Oops")))
}
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
@@ -165,7 +158,6 @@ class RoomDetailsEditPresenterTest {
assertThat(initialState.canChangeName).isFalse()
assertThat(initialState.canChangeAvatar).isFalse()
assertThat(initialState.canChangeTopic).isFalse()
// When the asynchronous check completes, the single field we can edit is true
val settledState = awaitItem()
assertThat(settledState.canChangeName).isFalse()
@@ -182,7 +174,6 @@ class RoomDetailsEditPresenterTest {
givenCanSendStateResult(StateEventType.ROOM_TOPIC, Result.success(true))
}
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
@@ -191,7 +182,6 @@ class RoomDetailsEditPresenterTest {
assertThat(initialState.canChangeName).isFalse()
assertThat(initialState.canChangeAvatar).isFalse()
assertThat(initialState.canChangeTopic).isFalse()
// When the asynchronous check completes, the single field we can edit is true
val settledState = awaitItem()
assertThat(settledState.canChangeName).isFalse()
@@ -202,38 +192,38 @@ class RoomDetailsEditPresenterTest {
@Test
fun `present - updates state in response to changes`() = runTest {
val room = aMatrixRoom(topic = "My topic", displayName = "Name", avatarUrl = AN_AVATAR_URL)
val room = aMatrixRoom(
topic = "My topic",
displayName = "Name",
avatarUrl = AN_AVATAR_URL,
emitRoomInfo = true,
)
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
val initialState = awaitItem()
val initialState = awaitFirstItem()
assertThat(initialState.roomTopic).isEqualTo("My topic")
assertThat(initialState.roomRawName).isEqualTo("Name")
assertThat(initialState.roomAvatarUrl).isEqualTo(roomAvatarUri)
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomName("Name II"))
awaitItem().apply {
assertThat(roomTopic).isEqualTo("My topic")
assertThat(roomRawName).isEqualTo("Name II")
assertThat(roomAvatarUrl).isEqualTo(roomAvatarUri)
}
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomName("Name III"))
awaitItem().apply {
assertThat(roomTopic).isEqualTo("My topic")
assertThat(roomRawName).isEqualTo("Name III")
assertThat(roomAvatarUrl).isEqualTo(roomAvatarUri)
}
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomTopic("Another topic"))
awaitItem().apply {
assertThat(roomTopic).isEqualTo("Another topic")
assertThat(roomRawName).isEqualTo("Name III")
assertThat(roomAvatarUrl).isEqualTo(roomAvatarUri)
}
initialState.eventSink(RoomDetailsEditEvents.HandleAvatarAction(AvatarAction.Remove))
awaitItem().apply {
assertThat(roomTopic).isEqualTo("Another topic")
@@ -245,18 +235,19 @@ class RoomDetailsEditPresenterTest {
@Test
fun `present - obtains avatar uris from gallery`() = runTest {
val room = aMatrixRoom(topic = "My topic", displayName = "Name", avatarUrl = AN_AVATAR_URL)
val room = aMatrixRoom(
topic = "My topic",
displayName = "Name",
avatarUrl = AN_AVATAR_URL,
emitRoomInfo = true,
)
fakePickerProvider.givenResult(anotherAvatarUri)
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
val initialState = awaitItem()
val initialState = awaitFirstItem()
assertThat(initialState.roomAvatarUrl).isEqualTo(roomAvatarUri)
initialState.eventSink(RoomDetailsEditEvents.HandleAvatarAction(AvatarAction.ChoosePhoto))
awaitItem().apply {
assertThat(roomAvatarUrl).isEqualTo(anotherAvatarUri)
@@ -266,19 +257,22 @@ class RoomDetailsEditPresenterTest {
@Test
fun `present - obtains avatar uris from camera`() = runTest {
val room = aMatrixRoom(topic = "My topic", displayName = "Name", avatarUrl = AN_AVATAR_URL)
val room = aMatrixRoom(
topic = "My topic",
displayName = "Name",
avatarUrl = AN_AVATAR_URL,
emitRoomInfo = true,
)
fakePickerProvider.givenResult(anotherAvatarUri)
val fakePermissionsPresenter = FakePermissionsPresenter()
val presenter = createRoomDetailsEditPresenter(
room = room,
permissionsPresenter = fakePermissionsPresenter,
)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
val initialState = awaitItem()
val initialState = awaitFirstItem()
assertThat(initialState.roomAvatarUrl).isEqualTo(roomAvatarUri)
assertThat(initialState.cameraPermissionState.permissionGranted).isFalse()
initialState.eventSink(RoomDetailsEditEvents.HandleAvatarAction(AvatarAction.TakePhoto))
@@ -299,48 +293,44 @@ class RoomDetailsEditPresenterTest {
@Test
fun `present - updates save button state`() = runTest {
val room = aMatrixRoom(topic = "My topic", displayName = "Name", avatarUrl = AN_AVATAR_URL)
val room = aMatrixRoom(
topic = "My topic",
displayName = "Name",
avatarUrl = AN_AVATAR_URL,
emitRoomInfo = true,
)
fakePickerProvider.givenResult(roomAvatarUri)
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
val initialState = awaitItem()
val initialState = awaitFirstItem()
assertThat(initialState.saveButtonEnabled).isFalse()
// Once a change is made, the save button is enabled
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomName("Name II"))
awaitItem().apply {
assertThat(saveButtonEnabled).isTrue()
}
// If it's reverted then the save disables again
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomName("Name"))
awaitItem().apply {
assertThat(saveButtonEnabled).isFalse()
}
// Make a change...
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomTopic("Another topic"))
awaitItem().apply {
assertThat(saveButtonEnabled).isTrue()
}
// Revert it...
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomTopic("My topic"))
awaitItem().apply {
assertThat(saveButtonEnabled).isFalse()
}
// Make a change...
initialState.eventSink(RoomDetailsEditEvents.HandleAvatarAction(AvatarAction.Remove))
awaitItem().apply {
assertThat(saveButtonEnabled).isTrue()
}
// Revert it...
initialState.eventSink(RoomDetailsEditEvents.HandleAvatarAction(AvatarAction.ChoosePhoto))
awaitItem().apply {
@@ -351,48 +341,44 @@ class RoomDetailsEditPresenterTest {
@Test
fun `present - updates save button state when initial values are null`() = runTest {
val room = aMatrixRoom(topic = null, displayName = "fallback", avatarUrl = null)
val room = aMatrixRoom(
topic = null,
displayName = "fallback",
avatarUrl = null,
emitRoomInfo = true,
)
fakePickerProvider.givenResult(roomAvatarUri)
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
val initialState = awaitItem()
val initialState = awaitFirstItem()
assertThat(initialState.saveButtonEnabled).isFalse()
// Once a change is made, the save button is enabled
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomName("Name II"))
awaitItem().apply {
assertThat(saveButtonEnabled).isTrue()
}
// If it's reverted then the save disables again
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomName("fallback"))
awaitItem().apply {
assertThat(saveButtonEnabled).isFalse()
}
// Make a change...
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomTopic("Another topic"))
awaitItem().apply {
assertThat(saveButtonEnabled).isTrue()
}
// Revert it...
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomTopic(""))
awaitItem().apply {
assertThat(saveButtonEnabled).isFalse()
}
// Make a change...
initialState.eventSink(RoomDetailsEditEvents.HandleAvatarAction(AvatarAction.ChoosePhoto))
awaitItem().apply {
assertThat(saveButtonEnabled).isTrue()
}
// Revert it...
initialState.eventSink(RoomDetailsEditEvents.HandleAvatarAction(AvatarAction.Remove))
awaitItem().apply {
@@ -403,15 +389,17 @@ class RoomDetailsEditPresenterTest {
@Test
fun `present - save changes room details if different`() = runTest {
val room = aMatrixRoom(topic = "My topic", displayName = "Name", avatarUrl = AN_AVATAR_URL)
val room = aMatrixRoom(
topic = "My topic",
displayName = "Name",
avatarUrl = AN_AVATAR_URL,
emitRoomInfo = true,
)
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
val initialState = awaitItem()
val initialState = awaitFirstItem()
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomName("New name"))
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomTopic("New topic"))
initialState.eventSink(RoomDetailsEditEvents.HandleAvatarAction(AvatarAction.Remove))
@@ -421,31 +409,24 @@ class RoomDetailsEditPresenterTest {
assertThat(room.newTopic).isEqualTo("New topic")
assertThat(room.newAvatarData).isNull()
assertThat(room.removedAvatar).isTrue()
cancelAndIgnoreRemainingEvents()
}
}
@Test
fun `present - save doesn't change room details if they're the same trimmed`() = runTest {
val room = aMatrixRoom(topic = "My topic", displayName = "Name", avatarUrl = AN_AVATAR_URL)
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
val initialState = awaitItem()
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomName(" Name "))
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomTopic(" My topic "))
initialState.eventSink(RoomDetailsEditEvents.Save)
assertThat(room.newName).isNull()
assertThat(room.newTopic).isNull()
assertThat(room.newAvatarData).isNull()
assertThat(room.removedAvatar).isFalse()
cancelAndIgnoreRemainingEvents()
}
}
@@ -453,22 +434,17 @@ class RoomDetailsEditPresenterTest {
@Test
fun `present - save doesn't change topic if it was unset and is now blank`() = runTest {
val room = aMatrixRoom(topic = null, displayName = "Name", avatarUrl = AN_AVATAR_URL)
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
val initialState = awaitItem()
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomTopic(""))
initialState.eventSink(RoomDetailsEditEvents.Save)
assertThat(room.newName).isNull()
assertThat(room.newTopic).isNull()
assertThat(room.newAvatarData).isNull()
assertThat(room.removedAvatar).isFalse()
cancelAndIgnoreRemainingEvents()
}
}
@@ -476,22 +452,17 @@ class RoomDetailsEditPresenterTest {
@Test
fun `present - save doesn't change name if it's now empty`() = runTest {
val room = aMatrixRoom(topic = "My topic", displayName = "Name", avatarUrl = AN_AVATAR_URL)
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
val initialState = awaitItem()
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomName(""))
initialState.eventSink(RoomDetailsEditEvents.Save)
assertThat(room.newName).isNull()
assertThat(room.newTopic).isNull()
assertThat(room.newAvatarData).isNull()
assertThat(room.removedAvatar).isFalse()
cancelAndIgnoreRemainingEvents()
}
}
@@ -499,20 +470,15 @@ class RoomDetailsEditPresenterTest {
@Test
fun `present - save processes and sets avatar when processor returns successfully`() = runTest {
val room = aMatrixRoom(topic = "My topic", displayName = "Name", avatarUrl = AN_AVATAR_URL)
givenPickerReturnsFile()
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
val initialState = awaitItem()
initialState.eventSink(RoomDetailsEditEvents.HandleAvatarAction(AvatarAction.ChoosePhoto))
initialState.eventSink(RoomDetailsEditEvents.Save)
skipItems(3)
assertThat(room.newName).isNull()
assertThat(room.newTopic).isNull()
assertThat(room.newAvatarData).isSameInstanceAs(fakeFileContents)
@@ -523,89 +489,92 @@ class RoomDetailsEditPresenterTest {
@Test
fun `present - save does not set avatar data if processor fails`() = runTest {
val room = aMatrixRoom(topic = "My topic", displayName = "Name", avatarUrl = AN_AVATAR_URL)
fakePickerProvider.givenResult(anotherAvatarUri)
fakeMediaPreProcessor.givenResult(Result.failure(Throwable("Oh no")))
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
val initialState = awaitItem()
initialState.eventSink(RoomDetailsEditEvents.HandleAvatarAction(AvatarAction.ChoosePhoto))
initialState.eventSink(RoomDetailsEditEvents.Save)
skipItems(2)
assertThat(room.newName).isNull()
assertThat(room.newTopic).isNull()
assertThat(room.newAvatarData).isNull()
assertThat(room.removedAvatar).isFalse()
assertThat(awaitItem().saveAction).isInstanceOf(AsyncAction.Failure::class.java)
}
}
@Test
fun `present - sets save action to failure if name update fails`() = runTest {
val room = aMatrixRoom(topic = "My topic", displayName = "Name", avatarUrl = AN_AVATAR_URL).apply {
val room = aMatrixRoom(
topic = "My topic",
displayName = "Name",
avatarUrl = AN_AVATAR_URL,
emitRoomInfo = true,
).apply {
givenSetNameResult(Result.failure(Throwable("!")))
}
saveAndAssertFailure(room, RoomDetailsEditEvents.UpdateRoomName("New name"))
}
@Test
fun `present - sets save action to failure if topic update fails`() = runTest {
val room = aMatrixRoom(topic = "My topic", displayName = "Name", avatarUrl = AN_AVATAR_URL).apply {
val room = aMatrixRoom(
topic = "My topic",
displayName = "Name",
avatarUrl = AN_AVATAR_URL,
emitRoomInfo = true,
).apply {
givenSetTopicResult(Result.failure(Throwable("!")))
}
saveAndAssertFailure(room, RoomDetailsEditEvents.UpdateRoomTopic("New topic"))
}
@Test
fun `present - sets save action to failure if removing avatar fails`() = runTest {
val room = aMatrixRoom(topic = "My topic", displayName = "Name", avatarUrl = AN_AVATAR_URL).apply {
val room = aMatrixRoom(
topic = "My topic",
displayName = "Name",
avatarUrl = AN_AVATAR_URL,
emitRoomInfo = true,
).apply {
givenRemoveAvatarResult(Result.failure(Throwable("!")))
}
saveAndAssertFailure(room, RoomDetailsEditEvents.HandleAvatarAction(AvatarAction.Remove))
}
@Test
fun `present - sets save action to failure if setting avatar fails`() = runTest {
givenPickerReturnsFile()
val room = aMatrixRoom(topic = "My topic", displayName = "Name", avatarUrl = AN_AVATAR_URL).apply {
val room = aMatrixRoom(
topic = "My topic",
displayName = "Name",
avatarUrl = AN_AVATAR_URL,
emitRoomInfo = true,
).apply {
givenUpdateAvatarResult(Result.failure(Throwable("!")))
}
saveAndAssertFailure(room, RoomDetailsEditEvents.HandleAvatarAction(AvatarAction.ChoosePhoto))
}
@Test
fun `present - CancelSaveChanges resets save action state`() = runTest {
givenPickerReturnsFile()
val room = aMatrixRoom(topic = "My topic", displayName = "Name", avatarUrl = AN_AVATAR_URL).apply {
givenSetTopicResult(Result.failure(Throwable("!")))
}
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
val initialState = awaitItem()
initialState.eventSink(RoomDetailsEditEvents.UpdateRoomTopic("foo"))
initialState.eventSink(RoomDetailsEditEvents.Save)
skipItems(2)
assertThat(awaitItem().saveAction).isInstanceOf(AsyncAction.Failure::class.java)
initialState.eventSink(RoomDetailsEditEvents.CancelSaveChanges)
assertThat(awaitItem().saveAction).isInstanceOf(AsyncAction.Uninitialized::class.java)
}
@@ -613,16 +582,13 @@ class RoomDetailsEditPresenterTest {
private suspend fun saveAndAssertFailure(room: MatrixRoom, event: RoomDetailsEditEvents) {
val presenter = createRoomDetailsEditPresenter(room)
moleculeFlow(RecompositionMode.Immediate) {
presenter.present()
}.test {
val initialState = awaitItem()
val initialState = awaitFirstItem()
initialState.eventSink(event)
initialState.eventSink(RoomDetailsEditEvents.Save)
skipItems(1)
assertThat(awaitItem().saveAction).isInstanceOf(AsyncAction.Loading::class.java)
assertThat(awaitItem().saveAction).isInstanceOf(AsyncAction.Failure::class.java)
}
@@ -633,7 +599,6 @@ class RoomDetailsEditPresenterTest {
val processedFile: File = mockk {
every { readBytes() } returns fakeFileContents
}
fakePickerProvider.givenResult(anotherAvatarUri)
fakeMediaPreProcessor.givenResult(
Result.success(
@@ -649,3 +614,8 @@ class RoomDetailsEditPresenterTest {
private const val ANOTHER_AVATAR_URL = "example://camera/foo.jpg"
}
}
private suspend fun <T> ReceiveTurbine<T>.awaitFirstItem(): T {
skipItems(2)
return awaitItem()
}

1
libraries/matrix/test/src/main/kotlin/io/element/android/libraries/matrix/test/TestData.kt
View File

@@ -56,6 +56,7 @@ val A_TRANSACTION_ID = TransactionId("aTransactionId")
const val A_UNIQUE_ID = "aUniqueId"
const val A_ROOM_NAME = "A room name"
const val A_ROOM_RAW_NAME = "A room raw name"
const val A_MESSAGE = "Hello world!"
const val A_REPLY = "OK, I'll be there!"
const val ANOTHER_MESSAGE = "Hello universe!"