Don't automatically derive Clone

Also add a place to start doing more unit-style testing.

Fixes #143

.appveyor.yml

@@ -3,7 +3,7 @@ cache:
   - '%HOMEDRIVE%%HOMEPATH%\.multirust -> .appveyor.yml'
 
 environment:
-  EXAMPLES: duration calculator console geometry membership text_transform turbo_blank json_builder
+  EXAMPLES: unit duration calculator console geometry membership text_transform turbo_blank json_builder
   VERBOSE: true
   RUST_BACKTRACE: 1
   matrix:

.travis.yml

@@ -21,7 +21,7 @@ cache:
 
 env:
   global:
-    - EXAMPLES="duration calculator console geometry membership text_transform turbo_blank json_builder"
+    - EXAMPLES="unit duration calculator console geometry membership text_transform turbo_blank json_builder"
     - VERBOSE=true
     - RUST_BACKTRACE=1
     - RUST_VERSION=stable

Cargo.toml

@@ -21,7 +21,7 @@ appveyor = { repository = "tildeio/helix", branch = "master", service = "github"
 
 [workspace]
 
-members = ["examples/calculator", "examples/console", "examples/geometry", "examples/duration", "examples/membership", "examples/text_transform", "examples/turbo_blank", "examples/json_builder"]
+members = ["examples/unit", "examples/calculator", "examples/console", "examples/geometry", "examples/duration", "examples/membership", "examples/text_transform", "examples/turbo_blank", "examples/json_builder"]
 
 [dependencies]
 libc = "0.2.0"

Rakefile

@@ -4,7 +4,7 @@ task :test do
     sh "bundle exec rake"
   end
 
-  examples = ENV["EXAMPLES"] || "duration calculator console geometry membership text_transform turbo_blank json_builder"
+  examples = ENV["EXAMPLES"] || "unit duration calculator console geometry membership text_transform turbo_blank json_builder"
 
   sh "bash ./examples/runner default #{examples}"
 end
@@ -15,7 +15,7 @@ task :install do
     sh "bundle"
   end
 
-  examples = ENV["EXAMPLES"] || "duration calculator console geometry membership text_transform turbo_blank json_builder"
+  examples = ENV["EXAMPLES"] || "unit duration calculator console geometry membership text_transform turbo_blank json_builder"
 
   sh "bash ./examples/runner install #{examples}"
 end

examples/unit/.gitignore

@@ -0,0 +1,3 @@
+target
+*.bundle
+*.gem

examples/unit/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "unit"
+version = "0.1.0"
+authors = ["Godfrey Chan <godfrey@tilde.io>"]
+
+[lib]
+
+crate-type = ["cdylib"]
+
+[dependencies.helix]
+path = "../.."

examples/unit/Gemfile

@@ -0,0 +1,5 @@
+source 'https://rubygems.org'
+
+gem 'helix_runtime', path: '../../ruby'
+gem 'rake', '~> 10.0'
+gem 'rspec', '~> 3.4'

examples/unit/Rakefile

@@ -0,0 +1,20 @@
+require 'bundler/setup'
+require 'helix_runtime/build_task'
+require 'rspec/core/rake_task'
+require_relative '../shared.rb'
+
+# For Windows
+$stdout.sync = true
+
+HelixRuntime::BuildTask.new do |t|
+  t.build_root = File.expand_path("../..", __dir__)
+  t.helix_lib_dir = File.expand_path("../../ruby/windows_build", __dir__)
+  t.pre_build = HelixRuntime::Tests.pre_build
+end
+
+RSpec::Core::RakeTask.new(:spec) do |t|
+  t.verbose = false
+end
+
+task :spec => :build
+task :default => :spec

examples/unit/lib/unit.rb

@@ -0,0 +1,2 @@
+require 'helix_runtime'
+require 'unit/native'

examples/unit/spec/spec_helper.rb

@@ -0,0 +1,2 @@
+$LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
+require 'unit'

examples/unit/spec/unit_spec.rb

@@ -0,0 +1,10 @@
+require "spec_helper"
+
+describe ClassContainingNonClonableFields do
+  it "works" do
+    c = ClassContainingNonClonableFields.new
+
+    expect(c).to be_instance_of(ClassContainingNonClonableFields)
+    expect(c.to_s).to eq("ClassContainingNonClonableFields")
+  end
+end

examples/unit/src/lib.rs

@@ -0,0 +1,23 @@
+#![recursion_limit="1024"]
+
+#[macro_use]
+extern crate helix;
+
+#[derive(Debug)]
+struct NotClonable();
+
+ruby! {
+    class ClassContainingNonClonableFields {
+        struct {
+            inner: NotClonable,
+        }
+
+        def initialize(helix) {
+            ClassContainingNonClonableFields { helix, inner: NotClonable {} }
+        }
+
+        def to_s(&self) -> &'static str {
+            "ClassContainingNonClonableFields"
+        }
+    }
+}

src/macros/codegen.rs

@@ -146,7 +146,7 @@ macro_rules! codegen_struct {
         ruby_name: $ruby_name:tt,
         struct: { $($struct:tt)* }
     } => {
-        #[derive(Clone, Debug)]
+        #[derive(Debug)]
         #[repr(C)]
         $($pub)* struct $rust_name {
             helix: $crate::Metadata,