tests: add initial tests

Signed-off-by: Christopher Arndt <chris@chrisarndt.de>

tests/nim.cfg

@@ -1 +1,3 @@
 --path:"../src/"
+--warning[BareExcept]:off
+--warning[UnusedImport]:off

tests/test_version.nim

@@ -0,0 +1,20 @@
+import std/[re, strformat, unittest]
+import jacket
+
+suite "test version":
+    test "getVersion":
+        var major, minor, micro, proto: cint
+        getVersion(major.addr, minor.addr, micro.addr, proto.addr)
+        #echo fmt"{major}.{minor}.{micro} proto {proto}"
+        check:
+            # yes, the function simply returns 0 for all vars :-D
+            major == 0
+            minor == 0
+            micro == 0
+            proto == 0
+    test "getVersionString":
+        let version = getVersionString()
+        #echo $version
+        check:
+            $typeof(version) == "cstring"
+            match($version, re(r"\d+\.\d+\.\d+"))