devextreme
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JavaScript/TypeScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (esm/__internal/scheduler/utils/loader/utils.test.js)
* Version: 25.2.7
* Build date: Tue May 05 2026
*
* Copyright (c) 2012 - 2026 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
import {
describe,
expect,
it
} from "@jest/globals";
import {
DataSource
} from "../../../data/data_source/m_data_source";
import CustomStore from "../../../data/m_custom_store";
import {
loadResource,
normalizeDataSource
} from "./utils";
describe("utils", () => {
describe("normalizeDataSource", () => {
it("JSON declaration should be wrapped to DataSource object", () => {
const filterValue = ["id", "=", "emp1"];
const dataSource = normalizeDataSource({
filter: filterValue,
store: new CustomStore({
load: () => {}
})
});
expect(dataSource instanceof DataSource).toBe(true);
expect(null === dataSource || void 0 === dataSource ? void 0 : dataSource.filter()).toBe(filterValue)
});
it("Array data should be wrapped to DataSource object", () => {
const dataSource = normalizeDataSource([{
id: 0
}, {
id: 1
}]);
expect(dataSource instanceof DataSource).toBe(true);
expect(null === dataSource || void 0 === dataSource ? void 0 : dataSource.filter()).toBe(void 0)
});
it("DataSource object shouldn't wrapped", () => {
const originalDataSource = new DataSource({
store: new CustomStore({
load: () => {}
})
});
const dataSource = normalizeDataSource(originalDataSource);
expect(dataSource).toBe(originalDataSource);
expect(null === dataSource || void 0 === dataSource ? void 0 : dataSource.filter()).toBe(void 0)
})
});
describe("loadResource", () => {
it("should return empty array", async () => {
expect(await loadResource(void 0)).toEqual([])
});
it("should return loaded array", async () => {
let loadCount = 0;
const dataSource = new DataSource({
store: new CustomStore({
load: () => {
loadCount += 1;
return [1, 2]
}
})
});
await dataSource.load();
expect(loadCount).toEqual(1);
expect(await loadResource(dataSource)).toEqual([1, 2])
});
it("should load and return array", async () => {
let loadCount = 0;
const dataSource = new DataSource({
store: new CustomStore({
load: () => {
loadCount += 1;
return [1, 2]
}
})
});
expect(await loadResource(dataSource)).toEqual([1, 2]);
expect(await loadResource(dataSource)).toEqual([1, 2]);
expect(loadCount).toEqual(1)
})
})
});