Re-organize class tests

The `test/language/class/` directory contains a small subset of
Test262's tests for ES2015 classes. The majority of tests for classes
are organized within `test/language/statements/class/`.

- Move the tests that rely on the ClassDeclaration syntactic form from
  `test/language/class/` to `test/language/statements/class/`.
- Move the test that relies on the ClassExpression syntactic form from
  `test/language/class/` to `test/language/expressions/class/`.

test/language/expressions/class/restricted-properties.js

@@ -11,8 +11,12 @@ es6id: 16.1
 
 var BaseClass = class {};
 
-assert.sameValue(BaseClass.hasOwnProperty('caller'), false, 'Functions created using ClassExpression syntactic form do not have own property "caller"');
-assert.sameValue(BaseClass.hasOwnProperty('arguments'), false, 'Functions created using ClassExpression syntactic form do not have own property "arguments"');
+assert.sameValue(
+  BaseClass.hasOwnProperty('caller'), false, 'No "caller" own property'
+);
+assert.sameValue(
+  BaseClass.hasOwnProperty('arguments'), false, 'No "arguments" own property'
+);
 
 assert.throws(TypeError, function() {
   return BaseClass.caller;
@@ -32,8 +36,12 @@ assert.throws(TypeError, function() {
 
 var SubClass = class extends BaseClass {};
 
-assert.sameValue(SubClass.hasOwnProperty('caller'), false, 'Functions created using ClassExpression syntactic form do not have own property "caller"');
-assert.sameValue(SubClass.hasOwnProperty('arguments'), false, 'Functions created using ClassExpression syntactic form do not have own property "arguments"');
+assert.sameValue(
+  SubClass.hasOwnProperty('caller'), false, 'No "caller" own property'
+);
+assert.sameValue(
+  SubClass.hasOwnProperty('arguments'), false, 'No "arguments" own property'
+);
 
 assert.throws(TypeError, function() {
   return SubClass.caller;

test/language/statements/class/definition/methods-restricted-properties.js

@@ -3,8 +3,8 @@
 
 /*---
 description: >
-    Functions created using MethodDefinition syntactic form do not
-    have own properties "caller" or "arguments", but inherit them from
+    Functions created using MethodDefinition syntactic form do not have own
+    properties "caller" or "arguments", but inherit them from
     %FunctionPrototype%.
 es6id: 16.1
 ---*/
@@ -18,12 +18,36 @@ class Class {
 var instance = new Class;
 var accessor = Object.getOwnPropertyDescriptor(Class.prototype, "accessor");
 
-assert.sameValue(instance.method.hasOwnProperty('caller'), false, 'Functions created using MethodDefinition syntactic form do not have own property "caller"');
-assert.sameValue(instance.method.hasOwnProperty('arguments'), false, 'Functions created using MethodDefinition syntactic form do not have own property "arguments"');
-assert.sameValue(accessor.get.hasOwnProperty('caller'), false, 'Accessor Functions created using MethodDefinition syntactic form do not have own property "caller"');
-assert.sameValue(accessor.get.hasOwnProperty('arguments'), false, 'Accessor Functions created using MethodDefinition syntactic form do not have own property "arguments"');
-assert.sameValue(accessor.set.hasOwnProperty('caller'), false, 'Accessor Functions created using MethodDefinition syntactic form do not have own property "caller"');
-assert.sameValue(accessor.set.hasOwnProperty('arguments'), false, 'Accessor Functions created using MethodDefinition syntactic form do not have own property "arguments"');
+assert.sameValue(
+  instance.method.hasOwnProperty('caller'),
+  false,
+  'No "caller" own property (method)'
+);
+assert.sameValue(
+  instance.method.hasOwnProperty('arguments'),
+  false,
+  'No "arguments" own property (method)'
+);
+assert.sameValue(
+  accessor.get.hasOwnProperty('caller'),
+  false,
+  'No "caller" own property ("get" accessor)'
+);
+assert.sameValue(
+  accessor.get.hasOwnProperty('arguments'),
+  false,
+  'No "arguments" own property ("get" accessor)'
+);
+assert.sameValue(
+  accessor.set.hasOwnProperty('caller'),
+  false,
+  'No "caller" own property ("set" accessor)'
+);
+assert.sameValue(
+  accessor.set.hasOwnProperty('arguments'),
+  false,
+  'No "arguments" own property ("set" accessor)'
+);
 
 // --- Test method restricted properties throw
 
@@ -78,4 +102,3 @@ assert.throws(TypeError, function() {
 assert.throws(TypeError, function() {
   accessor.set.arguments = {};
 });
-

test/language/statements/class/restricted-properties.js

@@ -3,16 +3,20 @@
 
 /*---
 description: >
-    Functions created using ClassDeclaration syntactic form do not
-    have own properties "caller" or "arguments", but inherit them from
+    Functions created using ClassDeclaration syntactic form do not have own
+    properties "caller" or "arguments", but inherit them from
     %FunctionPrototype%.
 es6id: 16.1
 ---*/
 
 class BaseClass {}
 
-assert.sameValue(BaseClass.hasOwnProperty('caller'), false, 'Functions created using ClassDeclaration syntactic form do not have own property "caller"');
-assert.sameValue(BaseClass.hasOwnProperty('arguments'), false, 'Functions created using ClassDeclaration syntactic form do not have own property "arguments"');
+assert.sameValue(
+  BaseClass.hasOwnProperty('caller'), false, 'No "caller" own property'
+);
+assert.sameValue(
+  BaseClass.hasOwnProperty('arguments'), false, 'No "arguments" own property'
+);
 
 assert.throws(TypeError, function() {
   return BaseClass.caller;
@@ -32,8 +36,12 @@ assert.throws(TypeError, function() {
 
 class SubClass extends BaseClass {}
 
-assert.sameValue(SubClass.hasOwnProperty('caller'), false, 'Functions created using ClassDeclaration syntactic form do not have own property "caller"');
-assert.sameValue(SubClass.hasOwnProperty('arguments'), false, 'Functions created using ClassDeclaration syntactic form do not have own property "arguments"');
+assert.sameValue(
+  SubClass.hasOwnProperty('caller'), false, 'No "caller" own property'
+);
+assert.sameValue(
+  SubClass.hasOwnProperty('arguments'), false, 'No "arguments" own property'
+);
 
 assert.throws(TypeError, function() {
   return SubClass.caller;