fix(functions): includes - pass whole context (with all consants) to …

…the next expand level

src/functions.js

@@ -38,11 +38,11 @@ export const functions = {
 				0].value);
 
 			return createValue(readFile(file).then(data =>
-				expand(JSON.parse(data), {
-					constants: {
+				expand(JSON.parse(data), Object.assign({}, context, {
+					constants: Object.assign({}, context.constants, {
 						basedir: path.dirname(file)
-					}
-				})
+					})
+				}))
 			));
 		}
 	},

tests/fixtures/first.json

@@ -1,3 +1,3 @@
 {
-  "first_key": "${include('other.json')}"
+  "first_key": "${include(nameOfTheOther)}"
 }

tests/simple_test.js

@@ -168,6 +168,7 @@ describe('expander', () => {
 
     it('can nest includes', () => expand("${include('fixtures/first.json')}", {
       constants: {
+        nameOfTheOther: 'other.json',
         basedir: __dirname
       }
     }).then(r => assert.deepEqual(r, {