Stronger lambda error (#4771)

* Make sure lambdaError() make the test fail in all circumstances.

* Fix existing errors on tests.

* Uniformize the way we are creating class under test.

* Cleanup

* Fix typo

* Fix failing test after rebase.

libraries/mediaupload/api/src/test/kotlin/io/element/android/libraries/mediaupload/api/MediaSenderTest.kt

@@ -37,7 +37,24 @@ class MediaSenderTest {
     @Test
     fun `given an attachment when sending it the preprocessor always runs`() = runTest {
         val preProcessor = FakeMediaPreProcessor()
-        val sender = createMediaSender(preProcessor)
+        val sender = createMediaSender(
+            preProcessor = preProcessor,
+            room = FakeJoinedRoom(
+                liveTimeline = FakeTimeline().apply {
+                    sendFileLambda = lambdaRecorder<
+                        File,
+                        FileInfo,
+                        String?,
+                        String?,
+                        ProgressCallback?,
+                        ReplyParameters?,
+                        Result<FakeMediaUploadHandler>,
+                        > { _, _, _, _, _, _ ->
+                        Result.success(FakeMediaUploadHandler())
+                    }
+                },
+            )
+        )
 
         val uri = Uri.parse("content://image.jpg")
         sender.sendMedia(uri = uri, mimeType = MimeTypes.Jpeg)