ability to run just one test case, finally

kiss/src/test/TestMain.hx

@@ -2,12 +2,32 @@ package test;
 
 import utest.Runner;
 import utest.ui.Report;
+#if macro
+import haxe.macro.Context;
+#end
 
 class TestMain {
     public static function main() {
         var runner = new Runner();
-        runner.addCases(test.cases);
+        addCases();
         Report.create(runner);
         runner.run();
     }
+
+    static macro function addCases() {
+        if (Context.defined("cases")) {
+            var cases = Context.definedValue("cases").split(",");
+            var block = [];
+            for (caseName in cases) {
+                var typePath = {
+                    pack: ["test", "cases"],
+                    name: caseName
+                };
+                block.push(macro runner.addCase(new $typePath()));
+            }
+            return macro $b{block};
+        } else {
+            return macro runner.addCases(test.cases);
+        }
+    }
 }