[fixes #30] don’t explode when moduleId: true

fixtures/true-module-fixture.js

@@ -0,0 +1,4 @@
+const foo = 5;
+const bar = 6;
+
+export { foo, bar };

fixtures/true-module.js

@@ -0,0 +1,9 @@
+define("true-module-fixture", ["exports"], function (exports) {
+  "use strict";
+
+  var foo = 5;
+  var bar = 6;
+
+  exports.foo = foo;
+  exports.bar = bar;
+});

index.js

@@ -42,12 +42,12 @@ Babel.prototype.transform = function(string, options) {
 Babel.prototype.processString = function (string, relativePath) {
   var options = this.copyOptions();
 
+  options.filename = options.sourceMapName = options.sourceFileName = relativePath;
+
   if (options.moduleId === true) {
     options.moduleId = replaceExtensions(this.extensionsRegex, options.filename);
   }
 
-  options.filename = options.sourceMapName = options.sourceFileName = relativePath;
-
   return this.transform(string, options).code;
 };
 

test.js

@@ -188,4 +188,21 @@ describe('filters files to transform', function() {
       expect(output).to.eql(input);
     });
   });
+
+
+  it('moduleId === true', function() {
+    return build(inputPath, {
+      inputSourceMap: false,
+      sourceMap: false,
+      moduleId: true,
+      modules: 'amdStrict'
+    }).then(function(results) {
+      var outputPath = results.directory;
+
+      var output = fs.readFileSync(path.join(outputPath, 'true-module-fixture.js')).toString();
+      var input = fs.readFileSync(path.join(inputPath,  'true-module.js')).toString();
+
+      expect(output).to.eql(input);
+    });
+  });
 });