List invoices with unit test (#27)

README.md

@@ -388,6 +388,16 @@ $ci = ChartMogul\CustomerInvoices::all([
 ]);
 ```
 
+**List Invoices**
+
+```php
+$invoices = ChartMogul\Invoice::all([
+    'external_id' => 'my_invoice',
+    'page' => 1,
+    'per_page' => 200
+]);
+```
+
 ### Transactions
 
 **Create a Transaction**

src/Invoice.php

@@ -5,6 +5,8 @@
 use ChartMogul\LineItems\AbstractLineItem;
 use ChartMogul\LineItems\OneTime;
 use ChartMogul\LineItems\Subscription as SubsItem;
+use ChartMogul\Service\AllTrait;
+use ChartMogul\Resource\AbstractResource;
 use ChartMogul\Transactions\AbstractTransaction;
 use ChartMogul\Transactions\Payment;
 use ChartMogul\Transactions\Refund;
@@ -13,11 +15,25 @@
 /**
  * @property-read string $uuid
  */
-class Invoice extends \ChartMogul\Resource\AbstractModel
+class Invoice extends AbstractResource
 {
+    use AllTrait;
+    /**
+     * @ignore
+     */
+    const RESOURCE_PATH = '/v1/invoices';
+    /**
+     * @ignore
+     */
+    const ENTRY_CLASS = Invoice::class;
+    /**
+     * @ignore
+     */
+    const ROOT_KEY = 'invoices';
 
     protected $uuid;
 
+    public $customer_uuid;
     public $date;
     public $currency;
     public $line_items = [];

tests/Unit/InvoiceTest.php

@@ -0,0 +1,88 @@
+<?php
+
+use ChartMogul\Http\Client;
+use ChartMogul\Invoice;
+use ChartMogul\Exceptions\ChartMogulException;
+use GuzzleHttp\Psr7;
+use GuzzleHttp\Psr7\Response;
+
+class InvoiceTest extends PHPUnit_Framework_TestCase
+{
+    const ALL_INVOICE_JSON = '{
+      "invoices": [
+        {
+          "uuid": "inv_565c73b2-85b9-49c9-a25e-2b7df6a677c9",
+          "customer_uuid": "cus_f466e33d-ff2b-4a11-8f85-417eb02157a7",
+          "external_id": "INV0001",
+          "date": "2015-11-01T00:00:00.000Z",
+          "due_date": "2015-11-15T00:00:00.000Z",
+          "currency": "USD",
+          "line_items": [
+            {
+              "uuid": "li_d72e6843-5793-41d0-bfdf-0269514c9c56",
+              "external_id": null,
+              "type": "subscription",
+              "subscription_uuid": "sub_e6bc5407-e258-4de0-bb43-61faaf062035",
+              "plan_uuid": "pl_eed05d54-75b4-431b-adb2-eb6b9e543206",
+              "prorated": false,
+              "service_period_start": "2015-11-01T00:00:00.000Z",
+              "service_period_end": "2015-12-01T00:00:00.000Z",
+              "amount_in_cents": 5000,
+              "quantity": 1,
+              "discount_code": "PSO86",
+              "discount_amount_in_cents": 1000,
+              "tax_amount_in_cents": 900,
+              "account_code": null
+            },
+            {
+              "uuid": "li_0cc8c112-beac-416d-af11-f35744ca4e83",
+              "external_id": null,
+              "type": "one_time",
+              "description": "Setup Fees",
+              "amount_in_cents": 2500,
+              "quantity": 1,
+              "discount_code": "PSO86",
+              "discount_amount_in_cents": 500,
+              "tax_amount_in_cents": 450,
+              "account_code": null
+            }
+          ],
+          "transactions": [
+            {
+              "uuid": "tr_879d560a-1bec-41bb-986e-665e38a2f7bc",
+              "external_id": null,
+              "type": "payment",
+              "date": "2015-11-05T00:14:23.000Z",
+              "result": "successful"
+            }
+          ]
+        }
+      ],
+      "current_page": 2,
+      "total_pages": 3
+    }';
+
+    public function testAllInvoices()
+    {
+        $stream = Psr7\stream_for(InvoiceTest::ALL_INVOICE_JSON);
+        $response = new Response(200, ['Content-Type' => 'application/json'], $stream);
+        $mockClient = new \Http\Mock\Client();
+        $mockClient->addResponse($response);
+
+        $cmClient = new Client(null, $mockClient);
+        $query = ["page" => 2, "external_id" => "INV0001"];
+        $result = Invoice::all($query, $cmClient);
+        $request = $mockClient->getRequests()[0];
+
+        $this->assertEquals("GET", $request->getMethod());
+        $uri = $request->getUri();
+        $this->assertEquals("page=2&external_id=INV0001", $uri->getQuery());
+        $this->assertEquals("/v1/invoices", $uri->getPath());
+
+        $this->assertEquals(1, sizeof($result));
+        $this->assertTrue($result[0] instanceof Invoice);
+        $this->assertEquals("cus_f466e33d-ff2b-4a11-8f85-417eb02157a7", $result[0]->customer_uuid);
+        $this->assertEquals(2, $result->current_page);
+        $this->assertEquals(3, $result->total_pages);
+    }
+}