Boolean lensed components

DataBindingTests.js

// Linked from https://github.com/fluid-project/infusion/pull/1038/files#diff-6972ab970b7ccb5a497ebc0fc51a19df59946de2ba24f58b1577c4ae40546f8cR1005-R1036    

fluid.defaults("fluid.tests.fluid6390booleanRoot", {
        gradeNames: "fluid.modelComponent",
        model: {
            shouldComponentExist: 1
        },
        dynamicComponents: {
            conditionalComponent: {
                source: "{that}.model.shouldComponentExist",
                type: "fluid.component"
            }
        }
    });

    jqUnit.test("FLUID-6390: Lensed components from a boolean", function () {
        var that = fluid.tests.fluid6390booleanRoot();
        jqUnit.assertTrue("Conditional component should have been constructed", fluid.isComponent(that.conditionalComponent));
        that.conditionalComponent.destroy();
        jqUnit.assertEquals("Destruction of component should have unset model value", false, that.model.shouldComponentExist);
        jqUnit.assertUndefined("Conditional component should not have been reconstructed", that.conditionalComponent);
        that.applier.change("shouldComponentExist", true);
        jqUnit.assertTrue("Conditional component should have been reconstructed", fluid.isComponent(that.conditionalComponent));
        jqUnit.assertEquals("Model flag should not have been unset", true, that.model.shouldComponentExist);
        that.applier.change("shouldComponentExist", false);
        jqUnit.assertUndefined("Conditional component should have been destroyed", that.conditionalComponent);
        jqUnit.assertEquals("Model flag should not have been reset", false, that.model.shouldComponentExist);
        var thatWithout = fluid.tests.fluid6390booleanRoot({
            model: {
                shouldComponentExist: null
            }
        });
        jqUnit.assertUndefined("Conditional component should not have been constructed on startup", thatWithout.conditionalComponent);
    });