Delete Sky tests that we're not going to run with Dart

sky/tests/js/classes.sky

-<sky>
-<import src="../resources/chai.sky" />
-<import src="../resources/mocha.sky" />
-<script>
-describe("ES6 classes", function() {
-  it("should create instances", function() {
-    class Example {}
-    var instance = new Example();
-    assert.instanceOf(instance, Example);
-  });
-
-  it("should create subclasses", function() {
-    class Parent {}
-    class Child extends Parent {}
-    var instance = new Child();
-    assert.instanceOf(instance, Child);
-    assert.instanceOf(instance, Parent);
-  });
-
-  it("should create anonymous classes", function() {
-    var Parent = class {}
-    var Child = class extends Parent {}
-    var instance = new Child();
-    assert.instanceOf(instance, Child);
-    assert.instanceOf(instance, Parent);
-  });
-
-  it("should put methods on the prototype", function() {
-    class Test {
-      exampleMethod() { }
-    }
-    var instance = new Test();
-    assert.isFalse(instance.hasOwnProperty("exampleMethod"));
-    var proto = Object.getPrototypeOf(instance);
-    assert.isTrue(proto.hasOwnProperty("exampleMethod"));
-  });
-
-  it("should call methods with |this|", function() {
-    class Adder {
-      constructor(value) {
-        this.value = value;
-      }
-      add(other) {
-        return this.value + other;
-      }
-    }
-
-    var adder = new Adder(10);
-    assert.equal(adder.add(15), 25);
-  });
-
-  it("should let toMethod rebind super", function() {
-    var getValue = function() {
-      assert.isFunction(this.value);
-      assert.isFunction(this.superValue);
-      return this.value() + super.superValue();
-    }
-
-    class HolderParent {
-      superValue() {
-        return 5;
-      }
-    }
-
-    class Holder extends HolderParent {
-      constructor() {
-        this.value_ = 5;
-      }
-      value() {
-        return this.value_;
-      }
-    }
-
-    var holder = new Holder();
-    var getValueMethod = getValue.toMethod(Holder.prototype);
-    assert.equal(getValueMethod.call(holder), 10);
-  });
-
-  it("should support super() constructor calls", function() {
-    class Parent {
-      constructor(value) {
-        this.value = value;
-      }
-    }
-
-    class Child extends Parent {
-      constructor(value) {
-        super(value + 5);
-      }
-    }
-
-    var child = new Child(10);
-    assert.equal(child.value, 15);
-  });
-
-  it("should automatically call super() in default constructor", function() {
-    class Parent {
-      constructor() {
-        this.value = 10;
-      }
-    }
-
-    class Child extends Parent {
-    }
-
-    var child = new Child();
-    assert.equal(child.value, 10);
-  });
-
-  it("should call super.method()", function() {
-    class Parent {
-      value() {
-        return 10;
-      }
-    }
-
-    class Child extends Parent {
-      value() {
-        return super.value() + 5;
-      }
-    }
-
-    var child = new Child();
-    assert.equal(child.value(), 15);
-  });
-
-  it("should support getters and setters", function() {
-    class Variable {
-      constructor(value) {
-        this.value_ = value;
-      }
-
-      get value() {
-        return this.value_;
-      }
-
-      set value(newValue) {
-        this.value_ = newValue;
-      }
-    }
-
-    var variable = new Variable("first");
-
-    // Methods are on the prototype.
-    var proto = Object.getPrototypeOf(variable);
-    var descriptor = Object.getOwnPropertyDescriptor(proto, "value");
-    assert.isObject(descriptor);
-    assert.isFunction(descriptor.get);
-    assert.isFunction(descriptor.set);
-    assert.isUndefined(descriptor.value);
-
-    // Getter and setter should not be on the instance.
-    assert.isUndefined(Object.getOwnPropertyDescriptor(variable, "value"));
-
-    assert.equal(variable.value, "first");
-    assert.equal(variable.value_, "first");
-    variable.value = "second";
-    assert.equal(variable.value, "second");
-    assert.equal(variable.value_, "second");
-  });
-});
-</script>
-</sky>