Fix datatests to be properly working in newer nightly rust

tests/datatests/mod.rs

@@ -0,0 +1,24 @@
+// This file is generated by build.rs
+
+use std::path::Path;
+use std::fs::File;
+use std::io::Read;
+use super::common::TestCase;
+use super::get_library;
+
+fn integration_tests(input: &Path) {
+    let mut str: String = "".to_string();
+    let mut file = File::open(input).unwrap();
+    file.read_to_string(&mut str).unwrap();
+    let test_case = serde_yaml::from_str::<TestCase>(&str).unwrap();
+    println!("	Running integration test {}", test_case.name);
+    test_case.run_test(get_library());
+}
+
+
+#[test]
+fn basic_single_turn() {
+    integration_tests(Path::new("tests/test_cases/basic_single_turn.yaml"));
+}
+
+        

tests/integration.rs

@@ -1,11 +1,6 @@
 #![feature(custom_test_frameworks)]
-#![feature(once_cell)]
-#![test_runner(datatest::runner)]
 #![allow(clippy::borrowed_box)]
 
-use std::fs::File;
-use std::io::Read;
-use std::path::Path;
 use std::sync::Arc;
 
 use pkmn_lib::dynamic_data::{
@@ -13,9 +8,10 @@ use pkmn_lib::dynamic_data::{
     ScriptCategory, ScriptContainer, ScriptOwnerData, TurnChoice, VolatileScriptsOwner,
 };
 
-use crate::common::{library_loader, TestCase};
+use crate::common::library_loader;
 
 pub mod common;
+pub mod datatests;
 
 fn get_library() -> Arc<dyn DynamicLibrary> {
     library_loader::load_library().library
@@ -49,19 +45,6 @@ fn validate_library_load() {
     );
 }
 
-#[datatest::files("tests/test_cases", {
-input in r"^(.*)\.yaml"
-})]
-#[cfg_attr(miri, ignore)]
-fn integration_tests(input: &Path) {
-    let mut str: String = "".to_string();
-    let mut file = File::open(input).unwrap();
-    file.read_to_string(&mut str).unwrap();
-    let test_case = serde_yaml::from_str::<TestCase>(&str).unwrap();
-    println!("\tRunning integration test {}", test_case.name);
-    test_case.run_test(get_library());
-}
-
 /// Assurance has the interesting properties that it creates a special data script internally, and
 /// deletes that data script through the get_owner functionality.
 #[test]