Add composer-in-php7-mode to HHVM test suite

Summary:
99.09% pass, a few more symfony-passing-things-that-aren't-strings problems
similar to the SplFileInfo/dirname one though.

refs #7869

Depends on D5196198

Reviewed By: mofarrell

Differential Revision: D5202473

fbshipit-source-id: e4e266c68075c83588771442f3aa7904d308d00b

hphp/test/frameworks/framework_class_overrides/Composer_PHP7.php

@@ -0,0 +1,10 @@
+<?hh
+require_once __DIR__.'/../Framework.php';
+
+class Composer_PHP7 extends Framework {
+  public function __construct(string $name) {
+    $tc = get_runtime_build().' -c '.__DIR__.'/../php7.ini'.
+      ' vendor/bin/phpunit';
+    parent::__construct($name, $tc);
+  }
+}

hphp/test/frameworks/frameworks.yaml

@@ -84,6 +84,15 @@
     flakey:
       # Depends on internet connection to example.com
       - composer/tests/Composer/Test/Util/RemoteFilesystemTest.php
+  composer_php7:
+    url: https://github.com/composer/composer.git
+    branch: 1.4.2
+    commit: 489e09ee6c3ba431fbeeef9147afdaeb6f91b647
+    install_root: composer_php7
+    test_root: composer_php7
+    flakey:
+      # Depends on internet connection to example.com
+      - composer_php7/tests/Composer/Test/Util/RemoteFilesystemTest.php
   doctrine2:
     url: https://github.com/doctrine/doctrine2.git
     # Stable is 2.4.4, but need master since we have pull requests.

hphp/test/frameworks/php7.ini

@@ -0,0 +1,23 @@
+[date]
+date.timezone = America/Los_Angeles
+
+[php]
+error_reporting = E_ALL & ~E_NOTICE
+
+[hhvm]
+hhvm.jit = false
+hhvm.jit_a_size = 10485760
+hhvm.jit_a_cold_size = 4194304
+hhvm.jit_a_frozen_size = 6291456
+hhvm.jit_global_data_size = 2097152
+hhvm.enable_zend_compat = true
+hhvm.mysql.read_timeout = 5000
+hhvm.error_handling.notice_frequency = 1
+hhvm.error_handling.warning_frequency = 1
+hhvm.http.slow_query_threshold = 0
+hhvm.resource_limit.serialization_size_limit = 134217728
+hhvm.libxml.ext_entity_whitelist = "file"
+hhvm.php7.all=1
+; We run the typechecker in our CI systems anyway; running it usually isn't
+; a good idea if you have a full framework_downloads/ directory.
+hhvm.hack.lang.auto_typecheck = 0