Initial project import

tools/v/vlib/sync/channel_fill_test.v

@@ -0,0 +1,20 @@
+import sync
+
+const queue_len = 1000
+const queue_fill = 763
+
+fn do_send(ch chan int, mut fin sync.Semaphore) {
+	for i in 0 .. queue_fill {
+		ch <- i
+	}
+	fin.post()
+}
+
+fn test_channel_len_cap() {
+	ch := chan int{cap: queue_len}
+	mut sem := sync.new_semaphore()
+	spawn do_send(ch, mut sem)
+	sem.wait()
+	assert ch.cap == queue_len
+	assert ch.len == queue_fill
+}