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libs/barista-components/core/src/common-behaviours/id.spec.ts
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/** | ||
* @license | ||
* Copyright 2020 Dynatrace LLC | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
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import { mixinId } from './id'; | ||
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describe('MixinId', () => { | ||
it('should augment an existing class with an property', () => { | ||
class EmptyClass {} | ||
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const classWithDisabled = mixinId(EmptyClass, 'dt-mixin-test'); | ||
const instance = new classWithDisabled(); | ||
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// Expected the mixed-into class to have an id property | ||
expect(instance.id).toMatch(/dt-mixin-test-\d/); | ||
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instance.id = 'my-id'; | ||
// Expected the mixed-into class to have an updated id property | ||
expect(instance.id).toBe('my-id'); | ||
}); | ||
}); |
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/** | ||
* @license | ||
* Copyright 2020 Dynatrace LLC | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
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import { Constructor } from './constructor'; | ||
import { isDefined } from '../util'; | ||
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/** | ||
* UniqueId counter, will be incremented with every | ||
* instatiation of the ExpandablePanel class | ||
*/ | ||
let uniqueId = 0; | ||
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export interface HasId { | ||
/** Represents the unique id of the component. */ | ||
id: string; | ||
} | ||
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/** Mixin to augment a directive with a `id` property. */ | ||
export function mixinId<T extends Constructor<{}>>( | ||
base: T, | ||
idPreset: string, | ||
): Constructor<HasId> & T { | ||
return class extends base { | ||
/** Sets a unique id for the expandable section. */ | ||
get id(): string { | ||
return this._id; | ||
} | ||
set id(value: string) { | ||
if (isDefined(value)) { | ||
this._id = value; | ||
} else { | ||
this._id = `${idPreset}-${uniqueId++}`; | ||
} | ||
} | ||
private _id = `${idPreset}-${uniqueId++}`; | ||
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// tslint:disable-next-line | ||
constructor(...args: any[]) { | ||
super(...args); // tslint:disable-line:no-inferred-empty-object-type | ||
} | ||
}; | ||
} |
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