Pretty printer test coverage

Our output for yield / yield from is currently not very nice, but
also not easy to change.

test/code/prettyPrinter/expr/intrinsics.test

@@ -0,0 +1,29 @@
+isset, empty, unset, exit, die, clone, eval
+-----
+<?php
+
+isset($a, $a[$b]);
+empty($a);
+empty('foo');
+unset($a, $a[$b]);
+exit;
+exit();
+exit(1);
+die;
+die();
+die("foo");
+clone $foo;
+eval('str');
+-----
+isset($a, $a[$b]);
+empty($a);
+empty('foo');
+unset($a, $a[$b]);
+die;
+die;
+die(1);
+die;
+die;
+die('foo');
+clone $foo;
+eval('str');

test/code/prettyPrinter/expr/literals.test

@@ -81,6 +81,12 @@ b';
     'a
     b';
 }
+
+// shell exec (similar to double quoted string)
+`foo`;
+`foo$a`;
+`foo{$a}bar`;
+`\`\'\"`;
 -----
 // magic constants
 __LINE__;
@@ -153,3 +159,8 @@ b';
     'a
     b';
 }
+// shell exec (similar to double quoted string)
+`foo`;
+`foo{$a}`;
+`foo{$a}bar`;
+`\`\\'\\"`;

test/code/prettyPrinter/expr/yield.test

@@ -0,0 +1,44 @@
+Yield
+-----
+<?php
+
+function gen()
+{
+    yield;
+    yield $a;
+    yield $a => $b;
+    $a = yield;
+    $a = (yield $b);
+    $a = (yield $b => $c);
+}
+// TODO Get rid of parens for cases 2 and 3
+-----
+function gen()
+{
+    yield;
+    (yield $a);
+    (yield $a => $b);
+    $a = yield;
+    $a = (yield $b);
+    $a = (yield $b => $c);
+}
+-----
+<?php
+
+function gen()
+{
+    $a = yield $b;
+    $a = yield $b => $c;
+    yield from $a;
+    $a = yield from $b;
+}
+// TODO Get rid of parens for last case
+-----
+!!php7
+function gen()
+{
+    $a = (yield $b);
+    $a = (yield $b => $c);
+    yield from $a;
+    $a = (yield from $b);
+}

test/code/prettyPrinter/onlyPHP.file-test

@@ -9,3 +9,8 @@ echo 'Bar Foo';
 
 echo 'Foo Bar';
 echo 'Bar Foo';
+-----
+<?php
+// avoid trim
+-----
+<?php

test/code/prettyPrinter/stmt/class.test

@@ -2,7 +2,7 @@ Class
 -----
 <?php
 
-class Foo
+class Foo extends Bar implements ABC, \DEF, namespace\GHI
 {
     var $a = 'foo';
     private $b = 'bar';
@@ -17,8 +17,15 @@ class Foo
     public function foo() {}
     abstract static function bar() {}
 }
+
+trait Bar
+{
+    function test()
+    {
+    }
+}
 -----
-class Foo
+class Foo extends Bar implements ABC, \DEF, namespace\GHI
 {
     var $a = 'foo';
     private $b = 'bar';
@@ -38,3 +45,9 @@ class Foo
     {
     }
 }
+trait Bar
+{
+    function test()
+    {
+    }
+}

test/code/prettyPrinter/stmt/const.test

@@ -0,0 +1,11 @@
+Constant declarations
+-----
+<?php
+
+const FOO = 'BAR';
+const FOO = 1 + 1;
+const FOO = BAR, BAR = FOO;
+-----
+const FOO = 'BAR';
+const FOO = 1 + 1;
+const FOO = BAR, BAR = FOO;

test/code/prettyPrinter/stmt/global_static_variables.test

@@ -0,0 +1,11 @@
+Global and static variables
+-----
+<?php
+
+global $a, $$a, ${$a[$a]};
+static $a, $b;
+static $a = 'foo', $b = 'bar';
+-----
+global $a, ${$a}, ${$a[$a]};
+static $a, $b;
+static $a = 'foo', $b = 'bar';