add test of function moduleContext option

test/form/custom-module-context-function/_config.js

@@ -0,0 +1,8 @@
+module.exports = {
+	description: 'allows custom module-specific context with a function option',
+	options: {
+		moduleContext ( id ) {
+			return /main\.js$/.test( id ) ? 'lolwut' : 'undefined';
+		}
+	}
+};

test/form/custom-module-context-function/_expected/amd.js

@@ -0,0 +1,7 @@
+define(function () { 'use strict';
+
+	undefined.prop = 'nope';
+
+	lolwut.prop = '???';
+
+});

test/form/custom-module-context-function/_expected/cjs.js

@@ -0,0 +1,5 @@
+'use strict';
+
+undefined.prop = 'nope';
+
+lolwut.prop = '???';

test/form/custom-module-context-function/_expected/es.js

@@ -0,0 +1,3 @@
+undefined.prop = 'nope';
+
+lolwut.prop = '???';

test/form/custom-module-context-function/_expected/iife.js

@@ -0,0 +1,8 @@
+(function () {
+	'use strict';
+
+	undefined.prop = 'nope';
+
+	lolwut.prop = '???';
+
+}());

test/form/custom-module-context-function/_expected/umd.js

@@ -0,0 +1,11 @@
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory() :
+	typeof define === 'function' && define.amd ? define(factory) :
+	(factory());
+}(this, (function () { 'use strict';
+
+	undefined.prop = 'nope';
+
+	lolwut.prop = '???';
+
+})));

test/form/custom-module-context-function/foo.js

@@ -0,0 +1 @@
+this.prop = 'nope';

test/form/custom-module-context-function/main.js

@@ -0,0 +1,2 @@
+import './foo.js';
+this.prop = '???';

test/test.js

@@ -316,6 +316,8 @@ describe( 'rollup', function () {
 
 				PROFILES.forEach( profile => {
 					it( 'generates ' + profile.format, () => {
+						process.chdir( FORM + '/' + dir );
+
 						return createBundle().then( bundle => {
 							const options = extend( {}, config.options, {
 								dest: FORM + '/' + dir + '/_actual/' + profile.format + '.js',