Difference between MutableSharedFlow() & Channel()

await.kt

class Foo1 {
	private val unpause = MutableSharedFlow<Unit>()
	suspend fun await() {
		delay(1000)
		unpause.first()
	}
	fun unpause() {
		unpause.tryEmit(Unit)
	}
}

class Foo2 {
	private val unpause = Channel<Unit>()
	suspend fun await() {
		delay(1000)
		unpause.receiveCatching()
	}
	fun unpause() {
		unpause.trySend(Unit)
	}
}

class ExampleUnitTest {
	@Test
	fun testUnpause() = runBlockingTest {
		var afterPause = false
		val foo = Foo1()

		launch {
			foo.await()
			afterPause = true
		}

		advanceTimeBy(1000)
		assertEquals(false, afterPause)

		foo.unpause()
		assertEquals(true, afterPause)
	}
}