From f5c4671bfbad96bf346bd7e9a21fc4317b4959df Mon Sep 17 00:00:00 2001
From: Indrajith K L
Date: Sat, 3 Dec 2022 17:00:20 +0530
Subject: Adds most of the tools

---
 v_windows/v/old/vlib/sync/channel_select_2_test.v | 62 +++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 v_windows/v/old/vlib/sync/channel_select_2_test.v

(limited to 'v_windows/v/old/vlib/sync/channel_select_2_test.v')

diff --git a/v_windows/v/old/vlib/sync/channel_select_2_test.v b/v_windows/v/old/vlib/sync/channel_select_2_test.v
new file mode 100644
index 0000000..189aaf6
--- /dev/null
+++ b/v_windows/v/old/vlib/sync/channel_select_2_test.v
@@ -0,0 +1,62 @@
+import time
+
+fn do_rec_i64(ch chan i64) {
+	mut sum := i64(0)
+	for _ in 0 .. 300 {
+		sum += <-ch
+	}
+	assert sum == 300 * (300 - 1) / 2
+}
+
+fn do_send_int(ch chan int) {
+	for i in 0 .. 300 {
+		ch <- i
+	}
+}
+
+fn do_send_byte(ch chan byte) {
+	for i in 0 .. 300 {
+		ch <- byte(i)
+	}
+}
+
+fn do_send_i64(ch chan i64) {
+	for i in 0 .. 300 {
+		ch <- i
+	}
+}
+
+fn test_select() {
+	chi := chan int{}
+	chl := chan i64{cap: 1}
+	chb := chan byte{cap: 10}
+	recch := chan i64{cap: 0}
+	go do_rec_i64(recch)
+	go do_send_int(chi)
+	go do_send_byte(chb)
+	go do_send_i64(chl)
+	mut sum := i64(0)
+	mut rl := i64(0)
+	mut sl := i64(0)
+	for _ in 0 .. 1200 {
+		select {
+			ri := <-chi {
+				sum += ri
+			}
+			recch <- sl {
+				sl++
+			}
+			rl = <-chl {
+				sum += rl
+			}
+			rb := <-chb {
+				sum += rb
+			}
+		}
+	}
+	// Use Gauß' formula for the first 2 contributions
+	// the 3rd contribution is `byte` and must be seen modulo 256
+	expected_sum := 2 * (300 * (300 - 1) / 2) + 256 * (256 - 1) / 2 + 44 * (44 - 1) / 2
+	assert sum == expected_sum
+	time.sleep(20 * time.millisecond) // to give assert in coroutine enough time
+}
-- 
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