ITT: Tests added & readme info added.

Author: dmitry-ivanov

README.md

@@ -61,6 +61,7 @@ Provides Laravel-specific testing helpers and asserts.
 - [ApplicationHelpers](#applicationhelpers)
   - [emulateLocal](#emulatelocal)
   - [emulateProduction](#emulateproduction)
+  - [emulateEnvironment](#emulateenvironment)
 - [ArtisanHelpers](#artisanhelpers)
   - [runConsoleCommand](#runconsolecommand)
 
@@ -130,6 +131,14 @@ Emulates that application is working at `production` environment:
 $this->emulateProduction();
 ```
 
+#### `emulateEnvironment()`
+
+Emulates that application is working at specified environment:
+
+```php
+$this->emulateEnvironment('space');
+```
+
 ### ArtisanHelpers
 
 #### `runConsoleCommand()`

tests/Helpers/ApplicationHelpersTest.php

@@ -6,13 +6,23 @@ class ApplicationHelpersTest extends TestCase
     public function it_can_emulate_local_environment()
     {
         $this->emulateLocal();
+
         $this->assertEquals('local', $this->app->environment());
     }
 
     /** @test */
     public function it_can_emulate_production_environment()
     {
         $this->emulateProduction();
+
         $this->assertEquals('production', $this->app->environment());
     }
+
+    /** @test */
+    public function it_can_emulate_any_environment()
+    {
+        $this->emulateEnvironment('space');
+
+        $this->assertEquals('space', $this->app->environment());
+    }
 }