Add php_version as optional in env:list

Author: pwtyler

src/Commands/Env/ListCommand.php

@@ -34,6 +34,7 @@ class ListCommand extends TerminusCommand implements SiteAwareInterface
      *     connection_mode: Connection Mode
      *     locked: Locked
      *     initialized: Initialized
+     *     php_version: PHP Version
      *     php_runtime_generation: PHP Runtime Generation
      * @default-fields id,created,domain,connection_mode,locked,initialized
 

tests/Functional/EnvCommandsTest.php

@@ -484,6 +484,33 @@ public function testListCommandWithPHPRuntimeGeneration()
         );
     }
 
+    /**
+     * @test
+     * @covers \Pantheon\Terminus\Commands\Env\ListCommand
+     *
+     * @group env
+     * @group short
+     */
+    public function testListCommandWithPHPVersion()
+    {
+        $envs = $this->terminusJsonResponse(
+            sprintf('env:list %s --fields=id,php_version', $this->getSiteName())
+        );
+        $this->assertIsArray($envs);
+        $env = array_shift($envs);
+
+        $this->assertArrayHasKey(
+            'id',
+            $env,
+            'An environment should have "id" field.'
+        );
+        $this->assertArrayHasKey(
+            'php_version',
+            $env,
+            'An environment should have "php_version" field when explicitly requested.'
+        );
+    }
+
     /**
      * @test
      * @covers \Pantheon\Terminus\Commands\Env\ViewCommand