Slack webhook channel name cannot be empty or just contain an hashtag (#4786)

routers/utils/utils_test.go

@@ -15,3 +15,20 @@ func TestRemoveUsernameParameterSuffix(t *testing.T) {
 	assert.Equal(t, "foobar", RemoveUsernameParameterSuffix("foobar"))
 	assert.Equal(t, "", RemoveUsernameParameterSuffix(""))
 }
+
+func TestIsValidSlackChannel(t *testing.T) {
+	tt := []struct {
+		channelName string
+		expected    bool
+	}{
+		{"gitea", true},
+		{"  ", false},
+		{"#", false},
+		{"gitea   ", true},
+		{"  gitea", true},
+	}
+
+	for _, v := range tt {
+		assert.Equal(t, v.expected, IsValidSlackChannel(v.channelName))
+	}
+}