Run all C++ tests from a single executable (#3582)

test/variant_math_test.cpp

@@ -0,0 +1,48 @@
+////////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2013 - 2021, Göteborg Bit Factory.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// https://www.opensource.org/licenses/mit-license.php
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#include <cmake.h>
+// cmake.h include header must come first
+
+#include <Variant.h>
+#include <test.h>
+
+#include <iostream>
+
+#define EPSILON 0.001
+
+////////////////////////////////////////////////////////////////////////////////
+int TEST_NAME(int, char**) {
+  UnitTest t(1);
+
+  Variant v0(10.0);
+  v0.sqrt();
+  t.is(v0.get_real(), 3.1622, EPSILON, "math sqrt 10 -> 3.1622");
+
+  return 0;
+}
+
+////////////////////////////////////////////////////////////////////////////////