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@owja/ioc

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Comparing version 1.0.0 to 1.0.1

dist/ioc.module.js

29

package.json
{
"name": "@owja/ioc",
"version": "1.0.0",
"version": "1.0.1",
"description": "dependency injection for javascript",
"main": "dist/ioc.js",
"module": "dist/ioc.mjs",
"module": "dist/ioc.module.js",
"source": "src/index.ts",

@@ -35,15 +35,15 @@ "types": "dist/index.d.ts",

"author": "Hauke Broer <info@owja.de>",
"license": "CC-BY-4.0",
"license": "MIT",
"devDependencies": {
"@types/jest": "^24.0.19",
"@typescript-eslint/eslint-plugin": "^2.4.0",
"@typescript-eslint/parser": "^2.4.0",
"eslint": "^6.5.1",
"eslint-plugin-jest": "^22.19.0",
"jest": "^24.9.0",
"@types/jest": "^25.2.1",
"@typescript-eslint/eslint-plugin": "^2.27.0",
"@typescript-eslint/parser": "^2.27.0",
"eslint": "^6.8.0",
"eslint-plugin-jest": "^23.8.2",
"jest": "^25.3.0",
"microbundle": "^0.11.0",
"prettier": "^1.18.2",
"ts-jest": "^24.1.0",
"ts-node": "^8.4.1",
"typescript": "^3.6.4"
"prettier": "1.19.1",
"ts-jest": "^25.3.1",
"ts-node": "^8.8.2",
"typescript": "^3.8.3"
},

@@ -54,4 +54,5 @@ "mangle": {

"files": [
"/dist"
"/dist",
"!/dist/example"
]
}

@@ -251,3 +251,3 @@ ![OWJA! IoC](resources/owja-ioc-logo.png)

#### Step 2 - Create symbols for our dependencies
#### Step 2 - Creating symbols for our dependencies

@@ -257,9 +257,35 @@ Now we create the folder ***services*** and add the new file ***services/types.ts***:

export const TYPE = {
"MyService" = Symbol("MyService"),
"MyOtherService" = Symbol("MyOtherService"),
MyService: Symbol("MyService"),
MyOtherService: Symbol("MyOtherService"),
};
```
#### Step 3 - Creating a container
#### Step 3 - Example services
Next we create out example services.
File ***services/my-service.ts***
```ts
export interface MyServiceInterface {
hello: string;
}
export class MyService implements MyServiceInterface{
hello = "world";
}
```
File ***services/my-other-service.ts***
```ts
export interface MyOtherServiceInterface {
random: number;
}
export class MyOtherService implements MyOtherServiceInterface {
random = Math.random();
}
```
#### Step 4 - Creating a container
Next we need a container to bind our dependencies to. Let's create the file ***services/container.ts***

@@ -284,3 +310,3 @@

#### Step 4 - Injecting dependencies
#### Step 5 - Injecting dependencies

@@ -290,3 +316,3 @@ Lets create a ***example.ts*** file in our source root:

```ts
import {container, TYPE, inject} from "./services/container";
import {TYPE, inject} from "./service/container";
import {MyServiceInterface} from "./service/my-service";

@@ -298,4 +324,4 @@ import {MyOtherServiceInterface} from "./service/my-other-service";

readonly myService!: MyServiceInterface;
@inject(TYPE.MyOtherSerice)
@inject(TYPE.MyOtherService)
readonly myOtherService!: MyOtherServiceInterface;

@@ -307,3 +333,4 @@ }

console.log(example.myService);
console.log(example.myOtherSerice);
console.log(example.myOtherService);
console.log(example.myOtherService);
```

@@ -314,14 +341,11 @@

The dependencies (services) will injected on the first call. This means if you rebind the service after
accessing the properties of the Example class, it will not resolve the new service. If you want a new
accessing the properties of the Example class, it will not resolve a new service. If you want a new
service each time you call `example.myService` you have to add the `NOCACHE` tag:
```ts
import {container, TYPE, inject} from "./services/container";
// [...]
import {NOCACHE} from "@owja/ioc";
// [...]
class Example {
@inject(TYPE.MyService, NOCACHE)
readonly myService!: MyServiceInterface;
// [...]

@@ -335,21 +359,63 @@ @inject(TYPE.MyOtherSerice, NOCACHE)

In this case the last two `console.log()` outputs should show different numbers.
## Unit testing with IoC
We can snapshot and restore a container for unit testing.
We are able to make multiple snapshots in a row too.
For unit testing we first create our mocks
***test/my-service-mock.ts***
```ts
import {container, TYPE} from "./services/container";
import {MyServiceInterface} from "../service/my-service";
beforeEach(() => {
container.snapshot();
});
export class MyServiceMock implements MyServiceInterface {
hello = "test";
}
```
afterEach(() => {
container.restore();
***test/my-other-service-mock.ts***
```ts
import {MyOtherServiceInterface} from "../service/my-other-service";
export class MyOtherServiceMock implements MyOtherServiceInterface {
random = 9;
}
```
test("can do something", () => {
container.rebind<MyServiceMock>(TYPE.MySerice).toValue(new MyServiceMock());
const mock = container.get<MyServiceMock>(TYPE.MySerice);
Within the tests we can snapshot and restore a container.
We are able to make multiple snapshots in a row too.
File ***example.test.ts***
```ts
import {container, TYPE} from "./service/container";
import {MyServiceInterface} from "./service/my-service";
import {MyOtherServiceInterface} from "./service/my-other-service";
import {MyServiceMock} from "./test/my-service-mock";
import {MyOtherServiceMock} from "./test/my-other-service-mock";
import {Example} from "./example";
describe("Example", () => {
let example: Example;
beforeEach(() => {
container.snapshot();
container.rebind<MyServiceInterface>(TYPE.MyService).to(MyServiceMock);
container.rebind<MyOtherServiceInterface>(TYPE.MyOtherService).to(MyOtherServiceMock);
example = new Example();
});
afterEach(() => {
container.restore();
});
test("should return \"test\"", () => {
expect(example.myService.hello).toBe("test");
});
test("should return \"9\"", () => {
expect(example.myOtherService.random).toBe(9);
});
});

@@ -375,4 +441,4 @@ ```

License under [Creative Commons Attribution 4.0 International](https://spdx.org/licenses/CC-BY-4.0.html)
**MIT**
Copyright © 2019 Hauke Broer

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