notable restructuring

tests/integration_test.rs

@@ -0,0 +1,18 @@
+use std::fs::File;
+
+mod files;
+use files::*;
+
+#[test]
+fn parse_all_VCDs() {
+    // see if we can parse all signal trees successfully
+    for file_name in FILES {
+        let file = File::open(file_name).unwrap();
+        let vcd = fastwave::parse_vcd(file);
+
+        if !vcd.is_ok() {
+            dbg!(file_name);
+            vcd.unwrap();
+        }
+    }
+}