Feature/container fetch method renamed (#3)

* Container.fetch method renamed to 'get'
* Added tests with Jest

.babelrc

@@ -0,0 +1,3 @@
+{
+  "presets": ["es2015"]
+}

.gitignore

@@ -0,0 +1,2 @@
+/node_modules/
+yarn.lock

README.md

@@ -48,5 +48,5 @@ Require the `api` service wherever you need it:
 ```js
 import container from 'my-container.js';
 
-container.fetch('api').login();
+container.get('api').login();
 ```

package.json

@@ -14,12 +14,17 @@
   },
   "homepage": "https://github.com/Elao/container.js#readme",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "jest"
   },
   "keywords": [
     "dependency",
     "injection",
     "container",
     "service"
-  ]
+  ],
+  "devDependencies": {
+    "babel-jest": "^19.0.0",
+    "babel-preset-es2015": "^6.24.0",
+    "jest": "^19.0.2"
+  }
 }

src/Container.js

@@ -14,7 +14,7 @@ class Container {
     this.parameters = new Map();
 
     this.resolve = this.resolve.bind(this);
-    this.fetch = this.fetch.bind(this);
+    this.get = this.get.bind(this);
   }
 
   /**
@@ -75,13 +75,13 @@ class Container {
   }
 
   /**
-   * Fetch parameter or service
+   * Get parameter or service identified by its name
    *
    * @param {String} name
    *
    * @return {mixed}
    */
-  fetch(name) {
+  get(name) {
     if (this.cache.has(name)) {
       return this.cache.get(name);
     }
@@ -119,7 +119,7 @@ class Container {
    * @return {mixed}
    */
   resolve(definition) {
-    const dependencies = definition.dependencies.map(this.fetch);
+    const dependencies = definition.dependencies.map(this.get);
     const Constructor = definition.classname;
     const service = new Constructor(...dependencies);
 

test/Container.spec.js

@@ -0,0 +1,19 @@
+import Container from '../src/Container';
+
+describe('Container', () => {
+    const container = new Container();
+    class MyClass { }
+    container.registerDefinition('my:class', MyClass);
+
+    describe('Container.get()', () => {
+        test('should return the expected service when asked for', () => {
+            expect(container.get('my:class')).toBeInstanceOf(MyClass);
+        });
+
+        test('should throw an error if an unexisting service or param is accessed', () => {
+            expect(() => {
+                container.get('unexisting:service');
+            }).toThrowError('Service or parameter "unexisting:service" not found.');
+        });
+    });
+});