Add Dataflow.Graph.newScope.
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@ -98,6 +98,12 @@ Graph.prototype.defineObservableProperty = function (obj, prop, value, options)
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return objectId;
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};
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Graph.newScope = function (o) {
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function O() {}
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O.prototype = o;
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return new O();
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};
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///////////////////////////////////////////////////////////////////////////
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module.exports.Graph = Graph;
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@ -129,3 +129,57 @@ describe('DerivedCell', function () {
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});
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});
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});
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describe('scopes', function () {
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var g = new Dataflow.Graph();
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g.enforceSubjectPresence = false;
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function buildScopes() {
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var rootScope = {};
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var midScope = Dataflow.Graph.newScope(rootScope);
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var outerScope = Dataflow.Graph.newScope(midScope);
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return {root: rootScope, mid: midScope, outer: outerScope};
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}
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it('should make rootward props visible further out', function () {
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var ss = buildScopes();
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g.defineObservableProperty(ss.root, 'p', 123);
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expect(ss.root.p).to.be(123);
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expect(ss.mid.p).to.be(123);
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expect(ss.outer.p).to.be(123);
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});
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it('should make changes at root visible at leaves', function () {
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var ss = buildScopes();
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g.defineObservableProperty(ss.root, 'p', 123);
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expect(ss.outer.p).to.be(123);
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ss.root.p = 234;
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expect(ss.root.p).to.be(234);
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expect(ss.outer.p).to.be(234);
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});
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it('should make changes at leaves visible at root', function () {
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var ss = buildScopes();
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g.defineObservableProperty(ss.root, 'p', 123);
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expect(ss.outer.p).to.be(123);
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ss.outer.p = 234;
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expect(ss.root.p).to.be(234);
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expect(ss.outer.p).to.be(234);
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});
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it('should hide definitions at leaves from roots', function () {
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var ss = buildScopes();
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g.defineObservableProperty(ss.outer, 'p', 123);
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expect(ss.outer.p).to.be(123);
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expect(ss.mid.p).to.be(undefined);
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expect(ss.root.p).to.be(undefined);
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});
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it('should hide middle definitions from roots but show to leaves', function () {
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var ss = buildScopes();
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g.defineObservableProperty(ss.mid, 'p', 123);
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expect(ss.outer.p).to.be(123);
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expect(ss.mid.p).to.be(123);
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expect(ss.root.p).to.be(undefined);
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});
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});
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