Set up unit tests (#24)

 - Set up a pattern for organizing .cc and .js test files
   roughly corresponding to each class to be tested
 - Add unit tests for the Function and Error classes
 - Update test binding.gyp file to build on Windows (fix quotes)
 - Update test binding.gyp and README to enable exceptions with MSVC
 - Fix type of CallbackInfo::This

Author: jasongin

.gitignore

@@ -0,0 +1,2 @@
+/node_modules
+/build

README.md

@@ -6,7 +6,7 @@ backward-compatibility with use with older versions of Node.js that do
 not have N-API built-in.
 
 To use N-API in a native module:
-  1. Add a dependency on this package to `package.json`. 
+  1. Add a dependency on this package to `package.json`.
   It is not yet published to npm, so reference it directly from GitHub.
 ```json
   "dependencies": {
@@ -27,6 +27,9 @@ To use N-API in a native module:
   'cflags!': [ '-fno-exceptions' ],
   'cflags_cc!': [ '-fno-exceptions' ],
   'xcode_settings': { 'GCC_ENABLE_CPP_EXCEPTIONS': 'YES' },
+  'msvs_settings': {
+    'VCCLCompilerTool': { 'ExceptionHandling': 1 },
+  },
 ```
 
   4. Include `napi.h` in the native module code.

napi-inl.h

@@ -1682,7 +1682,7 @@ inline const Value CallbackInfo::operator [](size_t index) const {
   return index < _argc ? Value(_env, _argv[index]) : Env().Undefined();
 }
 
-inline Object CallbackInfo::This() const {
+inline Value CallbackInfo::This() const {
   if (_this == nullptr) {
     return Env().Undefined();
   }

napi.h

@@ -617,7 +617,7 @@ namespace Napi {
     Napi::Env Env() const;
     size_t Length() const;
     const Value operator [](size_t index) const;
-    Object This() const;
+    Value This() const;
     void* Data() const;
     void SetData(void* data);
 

package.json

@@ -5,6 +5,7 @@
   "dependencies": {},
   "description": "Node.js API (N-API)",
   "devDependencies": {
+    "node-gyp": "^3.6.0"
   },
   "directories": {},
   "homepage": "https://github.com/nodejs/node-api",
@@ -18,6 +19,8 @@
     "url": "git://github.com/nodejs/node-api.git"
   },
   "scripts": {
+    "pretest": "node-gyp rebuild -C test",
+    "test": "node test"
   },
   "version": "0.1.0"
 }

test/binding.cc

@@ -2,17 +2,12 @@
 
 using namespace Napi;
 
-Value Test1(const CallbackInfo& info) {
-  auto env = info.Env();
-  Object obj = Object::New(env);
-
-  obj["foo"] = String::New(env, "bar");
-
-  return obj;
-}
+Object InitError(Env env);
+Object InitFunction(Env env);
 
 void Init(Env env, Object exports, Object module) {
-  exports.Set("test1", Function::New(env, Test1));
+  exports.Set("error", InitError(env));
+  exports.Set("function", InitFunction(env));
 }
 
 NODE_API_MODULE(addon, Init)

test/binding.gyp

@@ -2,12 +2,19 @@
   'targets': [
     {
       'target_name': 'binding',
-      'sources': [ 'binding.cc' ],
-      'include_dirs': ['<!(node -p \'require("../").include\')'],
-      'dependencies': ['<!(node -p \'require("../").gyp\')'],
+      'sources': [
+        'binding.cc',
+        'error.cc',
+        'function.cc',
+      ],
+      'include_dirs': ["<!(node -p \"require('../').include\")"],
+      'dependencies': ["<!(node -p \"require('../').gyp\")"],
       'cflags!': [ '-fno-exceptions' ],
       'cflags_cc!': [ '-fno-exceptions' ],
-      'xcode_settings': { 'GCC_ENABLE_CPP_EXCEPTIONS': 'YES' }
+      'xcode_settings': { 'GCC_ENABLE_CPP_EXCEPTIONS': 'YES' },
+      'msvs_settings': {
+        'VCCLCompilerTool': { 'ExceptionHandling': 1 },
+      },
     }
   ]
 }

test/error.cc

@@ -0,0 +1,66 @@
+#include "napi.h"
+
+using namespace Napi;
+
+void ThrowError(const CallbackInfo& info) {
+  std::string message = info[0].As<String>().Utf8Value();
+  throw Error::New(info.Env(), message);
+}
+
+void ThrowTypeError(const CallbackInfo& info) {
+  std::string message = info[0].As<String>().Utf8Value();
+  throw TypeError::New(info.Env(), message);
+}
+
+void ThrowRangeError(const CallbackInfo& info) {
+  std::string message = info[0].As<String>().Utf8Value();
+  throw RangeError::New(info.Env(), message);
+}
+
+Value CatchError(const CallbackInfo& info) {
+  Function thrower = info[0].As<Function>();
+  try {
+    thrower({});
+  } catch (const Error& e) {
+     return e;
+  }
+  return info.Env().Null();
+}
+
+Value CatchErrorMessage(const CallbackInfo& info) {
+  Function thrower = info[0].As<Function>();
+  try {
+    thrower({});
+  } catch (const Error& e) {
+     std::string message = e.Message();
+     return String::New(info.Env(), message);
+  }
+  return info.Env().Null();
+}
+
+void DoNotCatch(const CallbackInfo& info) {
+  Function thrower = info[0].As<Function>();
+  thrower({});
+}
+
+void CatchAndRethrowError(const CallbackInfo& info) {
+  Function thrower = info[0].As<Function>();
+  try {
+    thrower({});
+  } catch (Error& e) {
+     e["caught"] = Boolean::New(info.Env(), true);
+     throw e;
+  }
+}
+
+Object InitError(Env env) {
+  Object exports = Object::New(env);
+  exports["throwError"] = Function::New(env, ThrowError);
+  exports["throwTypeError"] = Function::New(env, ThrowTypeError);
+  exports["throwRangeError"] = Function::New(env, ThrowRangeError);
+  exports["catchError"] = Function::New(env, CatchError);
+  exports["catchErrorMessage"] = Function::New(env, CatchErrorMessage);
+  exports["doNotCatch"] = Function::New(env, DoNotCatch);
+  exports["catchAndRethrowError"] = Function::New(env, CatchAndRethrowError);
+  return exports;
+}

test/error.js

@@ -0,0 +1,43 @@
+'use strict';
+const buildType = process.config.target_defaults.default_configuration;
+const binding = require(`./build/${buildType}/binding.node`);
+const assert = require('assert');
+
+assert.throws(() => binding.error.throwError('test'), err => {
+   return err instanceof Error && err.message === 'test';
+});
+
+assert.throws(() => binding.error.throwTypeError('test'), err => {
+   return err instanceof TypeError && err.message === 'test';
+});
+
+assert.throws(() => binding.error.throwRangeError('test'), err => {
+   return err instanceof RangeError && err.message === 'test';
+});
+
+assert.throws(
+  () => binding.error.doNotCatch(
+    () => {
+      throw new TypeError('test');
+    }),
+  err => {
+    return err instanceof TypeError && err.message === 'test' && !err.caught;
+  });
+
+assert.throws(
+  () => binding.error.catchAndRethrowError(
+    () => {
+      throw new TypeError('test');
+    }),
+  err => {
+    return err instanceof TypeError && err.message === 'test' && err.caught;
+  });
+
+const err = binding.error.catchError(
+   () => { throw new TypeError('test'); });
+assert(err instanceof TypeError);
+assert.strictEqual(err.message, 'test');
+
+const msg = binding.error.catchErrorMessage(
+   () => { throw new TypeError('test'); });
+assert.strictEqual(msg, 'test');

test/function.cc

@@ -0,0 +1,79 @@
+#include "napi.h"
+
+using namespace Napi;
+
+void VoidCallback(const CallbackInfo& info) {
+  auto env = info.Env();
+  Object obj = info[0].As<Object>();
+
+  obj["foo"] = String::New(env, "bar");
+}
+
+Value ValueCallback(const CallbackInfo& info) {
+  auto env = info.Env();
+  Object obj = Object::New(env);
+
+  obj["foo"] = String::New(env, "bar");
+
+  return obj;
+}
+
+Value CallWithArgs(const CallbackInfo& info) {
+   Function func = info[0].As<Function>();
+   return func({ info[1], info[2], info[3] });
+}
+
+Value CallWithVector(const CallbackInfo& info) {
+   Function func = info[0].As<Function>();
+   std::vector<napi_value> args;
+   args.reserve(3);
+   args.push_back(info[1]);
+   args.push_back(info[2]);
+   args.push_back(info[3]);
+   return func.Call(args);
+}
+
+Value CallWithReceiverAndArgs(const CallbackInfo& info) {
+   Function func = info[0].As<Function>();
+   Value receiver = info[1];
+   return func.Call(receiver, { info[2], info[3], info[4] });
+}
+
+Value CallWithReceiverAndVector(const CallbackInfo& info) {
+   Function func = info[0].As<Function>();
+   Value receiver = info[1];
+   std::vector<napi_value> args;
+   args.reserve(3);
+   args.push_back(info[2]);
+   args.push_back(info[3]);
+   args.push_back(info[4]);
+   return func.Call(receiver, args);
+}
+
+Value CallConstructorWithArgs(const CallbackInfo& info) {
+   Function func = info[0].As<Function>();
+   return func.New({ info[1], info[2], info[3] });
+}
+
+Value CallConstructorWithVector(const CallbackInfo& info) {
+   Function func = info[0].As<Function>();
+   std::vector<napi_value> args;
+   args.reserve(3);
+   args.push_back(info[1]);
+   args.push_back(info[2]);
+   args.push_back(info[3]);
+   return func.New(args);
+}
+
+Object InitFunction(Env env) {
+  Object exports = Object::New(env);
+  exports["voidCallback"] = Function::New(env, VoidCallback, "voidCallback");
+  exports["valueCallback"] = Function::New(env, ValueCallback, std::string("valueCallback"));
+  exports["callWithArgs"] = Function::New(env, CallWithArgs);
+  exports["callWithVector"] = Function::New(env, CallWithVector);
+  exports["callWithReceiverAndArgs"] = Function::New(env, CallWithReceiverAndArgs);
+  exports["callWithReceiverAndVector"] = Function::New(env, CallWithReceiverAndVector);
+  exports["callConstructorWithArgs"] = Function::New(env, CallConstructorWithArgs);
+  exports["callConstructorWithVector"] = Function::New(env, CallConstructorWithVector);
+  return exports;
+}