fixed + tests

realize/utils.go

@@ -56,6 +56,9 @@ func ext(path string) string {
 	for i := len(path) - 1; i >= 0 && !os.IsPathSeparator(path[i]); i-- {
 		if path[i] == '.' {
 			ext = path[i:]
+			if index := strings.LastIndex(ext,"."); index > 0{
+				ext = ext[index:]
+			}
 		}
 	}
 	if ext != "" {

realize/utils_test.go

@@ -63,3 +63,21 @@ func TestWdir(t *testing.T) {
 		t.Error("Expected", filepath.Base(expected), "instead", result)
 	}
 }
+
+func TestExt(t *testing.T){
+	paths := map[string]string{
+		"/test/a/b/c": "",
+		"/test/a/ac.go": "go",
+		"/test/a/ac.test.go": "go",
+		"/test/a/ac_test.go": "go",
+		"/test/./ac_test.go": "go",
+		"/test/a/.test": "test",
+		"/test/a/.": "",
+	}
+	for i, v := range paths {
+		if ext(i) != v{
+			t.Error("Wrong extension",ext(i),v)
+		}
+	}
+
+}