add basic test

xmake.lua

@@ -6,6 +6,18 @@ target("Pivot")
     set_rundir("$(projectdir)/matricies")
     set_languages("c++17")
 
+
+
+
+
+target("PivotTest")
+    set_kind("binary")
+    add_files("test/*.cpp", "src/Matrix.cpp")
+    add_includedirs("src")
+    set_default(false)
+    add_tests("compile_and_run")
+    set_rundir("$(projectdir)/matricies")
+
 --
 -- If you want to known more usage about xmake, please see https://xmake.io
 --