Add HttpProvider test.

test/unit/HttpProviderTest.php

@@ -0,0 +1,60 @@
+<?php
+
+namespace Test\Unit;
+
+use RuntimeException;
+use Test\TestCase;
+use Web3\RequestManagers\HttpRequestManager;
+use Web3\Providers\HttpProvider;
+use Web3\Methods\Web3\ClientVersion;
+
+class HttpProviderTest extends TestCase
+{
+    /**
+     * testSend
+     * 
+     * @return void
+     */
+    public function testSend()
+    {
+        $requestManager = new HttpRequestManager('http://localhost:8545');
+        $provider = new HttpProvider($requestManager);
+        $method = new ClientVersion('web3_clientVersion', []);
+
+        $provider->send($method, function ($err, $version) {
+            if ($err !== null) {
+                $this->fail($err->getMessage());
+            }
+            $this->assertTrue(is_string($version));
+        });
+    }
+
+    /**
+     * testBatch
+     * 
+     * @return void
+     */
+    public function testBatch()
+    {
+        $requestManager = new HttpRequestManager('http://localhost:8545');
+        $provider = new HttpProvider($requestManager);
+        $method = new ClientVersion('web3_clientVersion', []);
+        $callback = function ($err, $data) {
+            if ($err !== null) {
+                $this->fail($err->getMessage());
+            }
+            $this->assertEquals($data[0], $data[1]);
+        };
+
+        try {
+            $provider->execute($callback);
+        } catch (RuntimeException $err) {
+            $this->assertTrue($err->getMessage() !== true);
+        }
+
+        $provider->batch(true);
+        $provider->send($method, null);
+        $provider->send($method, null);
+        $provider->execute($callback);
+    }
+}