BatchReturn tests (#753)

Co-authored-by: zenground0 <[email protected]>
Co-authored-by: Aayush Rajasekaran <[email protected]>

runtime/tests/batch_return_test.rs

@@ -0,0 +1,81 @@
+use fil_actors_runtime::{BatchReturn, BatchReturnGen};
+use fvm_shared::error::ExitCode;
+
+#[test]
+fn batch_generation() {
+    let mut gen = BatchReturnGen::new(5);
+    gen.add_success();
+    gen.add_fail(ExitCode::SYS_OUT_OF_GAS);
+    gen.add_fail(ExitCode::USR_ILLEGAL_STATE);
+    gen.add_success();
+    gen.add_fail(ExitCode::USR_ILLEGAL_ARGUMENT);
+
+    let br = gen.gen();
+    assert_eq!(5, br.size());
+    assert!(!br.all_ok());
+    assert_eq!(
+        vec![
+            ExitCode::OK,
+            ExitCode::SYS_OUT_OF_GAS,
+            ExitCode::USR_ILLEGAL_STATE,
+            ExitCode::OK,
+            ExitCode::USR_ILLEGAL_ARGUMENT
+        ],
+        br.codes()
+    );
+
+    let ret_vals = vec!["first", "second", "third", "fourth", "fifth"];
+    assert_eq!(vec!["first", "fourth"], br.successes(&ret_vals));
+}
+
+#[test]
+fn batch_generation_constants() {
+    let br = BatchReturn::ok(3);
+    assert_eq!(3, br.size());
+    assert!(br.all_ok());
+    assert_eq!(vec![ExitCode::OK, ExitCode::OK, ExitCode::OK], br.codes());
+    let ret_vals = vec!["first", "second", "third"];
+    assert_eq!(ret_vals, br.successes(&ret_vals));
+
+    let br = BatchReturn::empty();
+    assert_eq!(0, br.size());
+    assert!(br.all_ok());
+    assert_eq!(Vec::<ExitCode>::new(), br.codes());
+    let empty_successes = Vec::<u64>::new();
+    assert_eq!(empty_successes, br.successes(&empty_successes));
+}
+
+#[test]
+#[should_panic(
+    expected = "programmer error, mismatched batch size 3 and processed count 4 batch return must include success/fail for all inputs"
+)]
+fn batch_generation_programmer_error_too_many() {
+    let mut gen = BatchReturnGen::new(3);
+    gen.add_success();
+    gen.add_success();
+    gen.add_success();
+    gen.add_success();
+
+    // this will panic
+    gen.gen();
+}
+
+#[test]
+#[should_panic(
+    expected = "programmer error, mismatched batch size 3 and processed count 2 batch return must include success/fail for all inputs"
+)]
+fn batch_generation_programmer_error_too_few() {
+    let mut gen = BatchReturnGen::new(3);
+    gen.add_success();
+    gen.add_fail(ExitCode::USR_NOT_FOUND);
+
+    // this will panic
+    gen.gen();
+}
+
+#[test]
+#[should_panic(expected = "items length 1 does not match batch size 300")]
+fn misaligned_success_panics() {
+    let br = BatchReturn::ok(300);
+    br.successes(&["first"]);
+}