From 938526755cd1f109c98cd3b37f19510aacf3aa73 Mon Sep 17 00:00:00 2001
From: Caio Freitas de Oliveira <caio.freitaso@gmail.com>
Date: Wed, 5 Oct 2022 00:54:00 -0300
Subject: [PATCH] restore tests

---
 src/conky.cc         |  1 +
 tests/CMakeLists.txt |  2 ++
 tests/test-hsv.cc    | 72 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 75 insertions(+)
 create mode 100644 tests/test-hsv.cc

diff --git a/src/conky.cc b/src/conky.cc
index 558d8369..c4603ce7 100644
--- a/src/conky.cc
+++ b/src/conky.cc
@@ -133,6 +133,7 @@
 #ifdef BUILD_HCL_GRADIENT
 #include "hcl_gradient.h"
 #endif /* BUILD_HCL_GRADIENT */
+
 #ifdef BUILD_HSV_GRADIENT
 #include "hsv_gradient.h"
 #endif /* BUILD_HSV_GRADIENT */
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index de7f1e1f..0d825a64 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -19,6 +19,8 @@ set(test_srcs ${test_srcs} test-diskio.cc)
 set(test_srcs ${test_srcs} test-fs.cc)
 if(BUILD_HCL_GRADIENT)
   set(test_srcs ${test_srcs} test-hcl.cc)
+elseif(BUILD_HSV_GRADIENT)
+  set(test_srcs ${test_srcs} test-hsv.cc)
 endif(BUILD_HCL_GRADIENT)
 
 add_executable(test-conky test-common.cc ${test_srcs})
diff --git a/tests/test-hsv.cc b/tests/test-hsv.cc
new file mode 100644
index 00000000..b46052a9
--- /dev/null
+++ b/tests/test-hsv.cc
@@ -0,0 +1,72 @@
+/*
+ *
+ * Conky, a system monitor, based on torsmo
+ *
+ * Any original torsmo code is licensed under the BSD license
+ *
+ * All code written since the fork of torsmo is licensed under the GPL
+ *
+ * Please see COPYING for details
+ *
+ * Copyright (c) 2005-2021 Brenden Matthews, Philip Kovacs, et. al.
+ *	(see AUTHORS)
+ * All rights reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "catch2/catch.hpp"
+
+#include <conky.h>
+#include <hsv_gradient.h>
+#include <lua-config.hh>
+
+int testColor(long *rgb, int scale) {
+  long hsv[3];
+  long rgb1[3];
+  long rgb2[3];
+  long rgb3[3];
+
+  rgb1[0] = to_decimal_scale(rgb[0], scale);
+  rgb1[1] = to_decimal_scale(rgb[1], scale);
+  rgb1[2] = to_decimal_scale(rgb[2], scale);
+
+  scaled_rgb_to_scaled_hsv(rgb1, hsv);
+  scaled_hsv_to_scaled_rgb(hsv, rgb2);
+
+  rgb3[0] = from_decimal_scale(rgb2[0], scale);
+  rgb3[1] = from_decimal_scale(rgb2[1], scale);
+  rgb3[2] = from_decimal_scale(rgb2[2], scale);
+
+  return (rgb[0] != rgb3[0] || rgb[1] != rgb3[1] || rgb[2] != rgb3[2]);
+}
+
+TEST_CASE("hsv gradient tests") {
+  SECTION("rgb -> hsv -> rgb should returns original value") {
+    int failedCount = 0;
+    long rgb1[3];
+
+    for (int i = 0; i < 256 && failedCount < 10; i++) {
+      for (int j = 0; j < 256 && failedCount < 10; j++) {
+        for (int k = 0; k < 256 && failedCount < 10; k++) {
+          rgb1[0] = i;
+          rgb1[1] = j;
+          rgb1[2] = k;
+          failedCount += testColor(rgb1, 255);
+        }
+      }
+    }
+    REQUIRE(failedCount == 0);
+  }
+}