Add tests

Author: scrogson

Diff for: .gitignore

@@ -25,6 +25,7 @@ Session.vim
 # Generated by Cargo
 **/target/*
 /rustler/target/
+/rustler_tests/priv/native/*
 /rustler_tests/target/
 /rustler_tests/_build
 /rustler_tests/deps

Diff for: Cargo.toml

@@ -3,6 +3,7 @@ members = [
   "rustler",
   "rustler_codegen",
   "rustler_sys",
+  "rustler_tests/native/binary_example",
   "rustler_tests/native/rustler_test",
   "rustler_tests/native/deprecated_macros",
 ]

Diff for: rustler_tests/mix.exs

@@ -10,6 +10,7 @@ defmodule RustlerTest.Mixfile do
       start_permanent: Mix.env() == :prod,
       compilers: [:rustler] ++ Mix.compilers(),
       rustler_crates: [
+       binary_example: [mode: :debug],
         rustler_test: [mode: :debug],
         deprecated_macros: [mode: :debug]
       ],

Diff for: rustler_tests/native/binary_example/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "binary_example"
+version = "0.1.0"
+authors = []
+edition = "2018"
+
+[[bin]]
+name = "binary_example"
+path = "src/main.rs"

Diff for: rustler_tests/native/binary_example/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello from Rust!");
+}