Add Contract tests.

test/unit/ContractTest.php

@@ -3,6 +3,9 @@
 namespace Test\Unit;
 
 use Test\TestCase;
+use Web3\Providers\HttpProvider;
+use Web3\RequestManagers\RequestManager;
+use Web3\RequestManagers\HttpRequestManager;
 use Web3\Contract;
 use Web3\Utils;
 use Web3\Contracts\Ethabi;
@@ -423,6 +426,37 @@ class ContractTest extends TestCase
         });
     }
 
+    /**
+     * testInstance
+     * 
+     * @return void
+     */
+    public function testInstance()
+    {
+        $contract = new Contract($this->testHost, $this->testAbi);
+
+        $this->assertTrue($contract->provider instanceof HttpProvider);
+        $this->assertTrue($contract->provider->requestManager instanceof RequestManager);
+    }
+
+    /**
+     * testSetProvider
+     * 
+     * @return void
+     */
+    public function testSetProvider()
+    {
+        $contract = $this->contract;
+        $requestManager = new HttpRequestManager('http://localhost:8545');
+        $contract->provider = new HttpProvider($requestManager);
+
+        $this->assertEquals($contract->provider->requestManager->host, 'http://localhost:8545');
+
+        $contract->provider = null;
+
+        $this->assertEquals($contract->provider->requestManager->host, 'http://localhost:8545');
+    }
+
     /**
      * testDeploy
      *