weekend work

gemma/tests/state_tests.rs

@@ -0,0 +1,40 @@
+use flate2::write::{GzEncoder, GzDecoder};
+use flate2::Compression;
+use std::io::prelude::*;
+use gemma::chip8::computer::Chip8Computer;
+
+fn load_result(to_load: &str) -> String {
+    std::fs::read_to_string(format!("resources/test/state/{}", to_load)).unwrap()
+}
+
+fn load_compressed_result(to_load: &str) -> String {
+    // load the file...
+    // ...then uncompress the string.
+    let mut decoder = GzDecoder::new(Vec::new());
+    decoder.write_all(load_result(to_load).as_ref()).expect("Decompression failed");
+    let decompressed_data = decoder.finish().expect("Failed to finish decompression");
+    String::from_utf8(decompressed_data).expect("Invalid UTF-8")
+}
+
+fn load_rom(to_load: &str) -> Vec<u8> {
+    std::fs::read(format!("resources/roms/{}", to_load)).unwrap()
+}
+#[test]
+fn smoke_round_trip_serialize_deserialize() {
+    let x = Chip8Computer::new();
+    let expected_string = load_result("smoke_001_round_trip_serialize_deserialize.json");
+    let serialized = serde_json::to_string(&x).unwrap();
+    let deserialized: Chip8Computer = serde_json::from_str(&expected_string).unwrap();
+    println!("SERIALIZED [{}]", serialized);
+    // TODO: using trim here is a hack to handle editors adding a newline at the end of a file...even a 1 line file
+    assert_eq!(serialized.trim(), expected_string.trim());
+    assert_eq!(deserialized, x);
+}
+
+#[test]
+fn computer_001_system_zero_state() {
+    let x = Chip8Computer::new();
+    let expected_string = load_compressed_result("smoke_002_round_trip_serialize_deserialize.tflt");
+    let serialized = serde_json::to_string(&x).unwrap();
+
+}