From 7122fb180cfb877129dd12c4619794b914668630 Mon Sep 17 00:00:00 2001
From: Shivaram Lingamneni <slingamn@cs.stanford.edu>
Date: Wed, 23 May 2018 16:14:23 -0400
Subject: [PATCH] add a test

---
 irc/modes/modes_test.go | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/irc/modes/modes_test.go b/irc/modes/modes_test.go
index 8f20bdfc..f68c79a7 100644
--- a/irc/modes/modes_test.go
+++ b/irc/modes/modes_test.go
@@ -8,6 +8,47 @@ import (
 	"testing"
 )
 
+func TestParseChannelModeChanges(t *testing.T) {
+	modes, unknown := ParseChannelModeChanges("+h", "wrmsr")
+	if len(unknown) > 0 {
+		t.Errorf("unexpected unknown mode change: %v", unknown)
+	}
+	expected := ModeChange{
+		Op:   Add,
+		Mode: Halfop,
+		Arg:  "wrmsr",
+	}
+	if len(modes) != 1 || modes[0] != expected {
+		t.Errorf("unexpected mode change: %v", modes)
+	}
+
+	modes, unknown = ParseChannelModeChanges("-v", "shivaram")
+	if len(unknown) > 0 {
+		t.Errorf("unexpected unknown mode change: %v", unknown)
+	}
+	expected = ModeChange{
+		Op:   Remove,
+		Mode: Voice,
+		Arg:  "shivaram",
+	}
+	if len(modes) != 1 || modes[0] != expected {
+		t.Errorf("unexpected mode change: %v", modes)
+	}
+
+	modes, unknown = ParseChannelModeChanges("+tx")
+	if len(unknown) != 1 || !unknown['x'] {
+		t.Errorf("expected that x is an unknown mode, instead: %v", unknown)
+	}
+	expected = ModeChange{
+		Op:   Add,
+		Mode: OpOnlyTopic,
+		Arg:  "",
+	}
+	if len(modes) != 1 || modes[0] != expected {
+		t.Errorf("unexpected mode change: %v", modes)
+	}
+}
+
 func TestSetMode(t *testing.T) {
 	set := NewModeSet()