本文整理汇总了TypeScript中@angular/core/src/view/index.Services.checkNoChangesView方法的典型用法代码示例。如果您正苦于以下问题：TypeScript Services.checkNoChangesView方法的具体用法？TypeScript Services.checkNoChangesView怎么用？TypeScript Services.checkNoChangesView使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类@angular/core/src/view/index.Services的用法示例。
在下文中一共展示了Services.checkNoChangesView方法的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的TypeScript代码示例。
示例1: it
it('should checkNoChanges', () => {
const {view} = createAndGetRootNodes(compViewDef([
elementDef(NodeFlags.None, null, null, 3, 'div'),
...contentQueryProviders(),
anchorDef(NodeFlags.HasEmbeddedViews, null, null, 0, embeddedViewDef([
elementDef(NodeFlags.None, null, null, 1, 'div'),
aServiceProvider(),
])),
]));
Services.checkAndUpdateView(view);
Services.checkNoChangesView(view);
const childView = Services.createEmbeddedView(view, view.def.nodes[3]);
attachEmbeddedView(asElementData(view, 3), 0, childView);
let err: any;
try {
Services.checkNoChangesView(view);
} catch (e) {
err = e;
}
expect(err).toBeTruthy();
expect(err.message)
.toBe(
`ExpressionChangedAfterItHasBeenCheckedError: Expression has changed after it was checked. Previous value: 'Query 1 not dirty'. Current value: 'Query 1 dirty'.`);
const debugCtx = getDebugContext(err);
expect(debugCtx.view).toBe(view);
expect(debugCtx.nodeIndex).toBe(2);
});示例2: it
it('should dirty check component views', () => {
let value: any;
class AComp {
a: any;
}
const update =
jasmine.createSpy('updater').and.callFake((check: NodeCheckFn, view: ViewData) => {
check(view, 0, ArgumentType.Inline, value);
});
const {view, rootNodes} = createAndGetRootNodes(
compViewDef([
elementDef(0, NodeFlags.None, null, null, 1, 'div', null, null, null, null, () => compViewDef(
[
elementDef(0, NodeFlags.None, null, null, 0, 'span', null, [[BindingFlags.TypeElementAttribute, 'a', SecurityContext.NONE]]),
], null, update
)),
directiveDef(1, NodeFlags.Component, null, 0, AComp, []),
]));
const compView = asElementData(view, 0).componentView;
value = 'v1';
Services.checkAndUpdateView(view);
expect(update.calls.mostRecent().args[1]).toBe(compView);
update.calls.reset();
Services.checkNoChangesView(view);
expect(update.calls.mostRecent().args[1]).toBe(compView);
value = 'v2';
expect(() => Services.checkNoChangesView(view))
.toThrowError(
`ExpressionChangedAfterItHasBeenCheckedError: Expression has changed after it was checked. Previous value: 'v1'. Current value: 'v2'.`);
});示例3: it
it('should dirty check embedded views', () => {
let childValue = 'v1';
const update =
jasmine.createSpy('updater').and.callFake((check: NodeCheckFn, view: ViewData) => {
check(view, 0, ArgumentType.Inline, childValue);
});
const {view: parentView, rootNodes} = createAndGetRootNodes(compViewDef([
elementDef(NodeFlags.None, null, null, 1, 'div'),
anchorDef(
NodeFlags.EmbeddedViews, null, null, 0, null,
embeddedViewDef(
[elementDef(
NodeFlags.None, null, null, 0, 'span', null,
[[BindingFlags.TypeElementAttribute, 'name', SecurityContext.NONE]])],
update))
]));
const childView0 = Services.createEmbeddedView(parentView, parentView.def.nodes[1]);
attachEmbeddedView(parentView, asElementData(parentView, 1), 0, childView0);
Services.checkAndUpdateView(parentView);
expect(update.calls.mostRecent().args[1]).toBe(childView0);
update.calls.reset();
Services.checkNoChangesView(parentView);
expect(update.calls.mostRecent().args[1]).toBe(childView0);
childValue = 'v2';
expect(() => Services.checkNoChangesView(parentView))
.toThrowError(
`ExpressionChangedAfterItHasBeenCheckedError: Expression has changed after it was checked. Previous value: 'v1'. Current value: 'v2'.`);
});示例4: expect
expect(() => Services.checkNoChangesView(view))示例5: expect
expect(() => Services.checkNoChangesView(parentView))