From: Pasi Kallinen <paxed@alt.org>
Date: Mon, 14 Mar 2022 17:06:07 +0000 (+0200)
Subject: Add test for selection subtraction
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b271826147424602fb751c9836ee994cc651d30f;p=nethack

Add test for selection subtraction
---

diff --git a/test/test_sel.lua b/test/test_sel.lua
index 6ad7d04a4..a6a3295b5 100644
--- a/test/test_sel.lua
+++ b/test/test_sel.lua
@@ -222,6 +222,29 @@ function test_sel_logical_xor()
    sel_has_n_points(selr, 2, __func__);
 end -- test_sel_logical_xor
 
+function test_sel_subtraction()
+   local __func__ = "test_sel_subtraction";
+   local sela = selection.new();
+   local selb = selection.new();
+
+   sela:set(5,5);
+   sela:set(6,5);
+   sela:set(5,6);
+   sela:set(6,6);
+
+   selb:set(5,5);
+   selb:set(6,6);
+
+   local selr = sela - selb;
+
+   sel_pt_ne(selr, 5,5, 0, __func__);
+   sel_pt_ne(selr, 6,5, 1, __func__);
+   sel_pt_ne(selr, 5,6, 1, __func__);
+   sel_pt_ne(selr, 6,6, 0, __func__);
+
+   sel_has_n_points(selr, 2, __func__);
+end -- test_sel_subtraction
+
 function test_sel_filter_percent()
    local __func__ = "test_sel_filter_percent";
    local sela = selection.negate();
@@ -448,6 +471,8 @@ test_sel_negate();
 test_sel_logical_and();
 test_sel_logical_or();
 test_sel_logical_xor();
+-- addition operator is the same as logical or
+test_sel_subtraction();
 test_sel_filter_percent();
 test_sel_line();
 test_sel_rect();