feat(tsconfig): load tsconfig.json

Author: teppeis

guess.js

@@ -1,5 +1,8 @@
+var fs = require('fs');
 var path = require('path');
 
+var ts = require('typescript');
+
 var pattern = 'test/**/*.ts';
 var packageData = require(path.join(process.cwd(), 'package.json'));
 
@@ -10,7 +13,34 @@ if (packageData &&
   pattern = testDir + ((testDir.lastIndexOf('/', 0) === 0) ? '' : '/') + '**/*.ts';
 }
 
+var compilerOptions = findAndParseTsConfig(process.cwd());
+
 require('./index')({
     cwd: process.cwd(),
-    pattern: pattern
+    pattern: pattern,
+    compilerOptions: compilerOptions
 });
+
+function findAndParseTsConfig(cwd) {
+  var tsconfigPath = ts.findConfigFile(process.cwd());
+  if (!tsconfigPath) {
+    return null;
+  }
+
+  var compilerOptions = null;
+  var parsed = ts.parseConfigFileTextToJson(tsconfigPath, fs.readFileSync(tsconfigPath, 'utf8'));
+  if (parsed.error) {
+    throw new Error(parsed.error.messageText);
+  }
+
+  if (!parsed.config || !parsed.config.compilerOptions) {
+    return null;
+  }
+
+  var converted = ts.convertCompilerOptionsFromJson(parsed.config.compilerOptions, process.cwd());
+  if (converted.errors && converted.errors.length > 0) {
+    var msg = converted.errors.map(function(e) {return e.messageText}).join(', ');
+    throw new Error(msg);
+  }
+  return converted.options;
+}

index.js

@@ -9,10 +9,7 @@ var TypeScriptSimple = require('typescript-simple').TypeScriptSimple;
 function espowerTypeScript(options) {
   var separator = (options.pattern.lastIndexOf('/', 0) === 0) ? '' : '/';
   var pattern = options.cwd + separator + options.pattern;
-  // TODO: load tsconfig.json
-  var tsconfig = options.tsconfig || {};
-  var compilerOptions = tsconfig.compilerOptions || {};
-  var tss = new TypeScriptSimple(compilerOptions, false);
+  var tss = new TypeScriptSimple(options.compilerOptions, false);
 
   require.extensions['.ts'] = function(localModule, filepath) {
     var result = tss.compile(fs.readFileSync(filepath, 'utf-8'));

package.json

@@ -28,6 +28,7 @@
   "dependencies": {
     "espower-source": "^1.0.0",
     "minimatch": "^3.0.0",
+    "typescript": "1.8.0-dev.20151106",
     "typescript-simple": "^3.0.2"
   }
 }

test/demo-es6-import.ts

@@ -0,0 +1,30 @@
+import hello from './lib/hello';
+
+let assert = require('power-assert');
+
+class Person {
+  constructor(public name: string, public age: number) {
+  }
+  getAge(): string {
+    return this.age;
+  }
+}
+
+describe('Person', () => {
+  let alice = new Person('alice', 3);
+  let bob = new Person('bob', 5);
+  it('#getAge', () => {
+    assert(alice.getAge() === 3)
+  })
+  it('#name', () => {
+    assert(alice.name === 'alice')
+  })
+  // failed
+  it('#mistake', () => {
+    assert(alice.name === bob.name)
+  })
+  // failed
+  it('hello', () => {
+    assert(hello() === 'whoa!');
+  });
+})

test/demo.ts

@@ -1,4 +1,6 @@
-import hello from './lib/hello';
+// Run with Node.js v5+
+
+'use strict';
 
 let assert = require('power-assert');
 
@@ -14,17 +16,17 @@ describe('Person', () => {
   let alice = new Person('alice', 3);
   let bob = new Person('bob', 5);
   it('#getAge', () => {
-    assert(alice.getAge() === 3)
-  })
+    assert(alice.getAge() === 3);
+  });
   it('#name', () => {
-    assert(alice.name === 'alice')
-  })
+    assert(alice.name === 'alice');
+  });
   // failed
   it('#mistake', () => {
-    assert(alice.name === bob.name)
-  })
+    assert(alice.name === bob.name);
+  });
   // failed
-  it('hello', () => {
-    assert(hello() === 'whoa!');
+  it('arrow function', () => {
+    assert(alice.name === (() => 1));
   });
-})
+});

test/to_be_instrumented_test.ts

@@ -1,3 +1,5 @@
+'use strict';
+
 let assert = require('power-assert')
 let expect = require('expect.js')
 

tsconfig.json

@@ -0,0 +1,6 @@
+{
+  "compilerOptions": {
+    "target": "ES5",
+    "noImplicitAny": true
+  }
+}