// (C) 2007-2019 GoodData Corporation
import { getSizeFromHeaders } from "../getDataSize";

describe("getSizeFromHeaders", () => {
    it("should return correct size for empty headers", () => {
        const simpleMetricDataResult: any[][] = [[], []];

        expect(getSizeFromHeaders(simpleMetricDataResult)).toEqual([1]);
    });

    it("should return correct size for empty", () => {
        const simpleMetricDataResult: any[][] = [];

        expect(getSizeFromHeaders(simpleMetricDataResult)).toEqual([1]);
    });

    it("should compute basic data size for one measure execution", () => {
        const simpleMetricDataResult = [[["quasiHeaderItem"]], []];

        expect(getSizeFromHeaders(simpleMetricDataResult)).toEqual([1]);
    });

    it("should compute data size for 2d execution", () => {
        const dataResult = [
            [["rowHeader1", "rowHeader2", "rowHeader3", "rowHeader4", "rowHeader5"]],
            [["colHeader1", "colHeader1", "colHeader1"]],
        ];

        const expectedSizeArray = [5, 3];

        expect(getSizeFromHeaders(dataResult)).toEqual(expectedSizeArray);
    });

    it("should assume all header groups in dimension are the same length", () => {
        /*
         * Contractually, AFM execution result has same number of headers in all header groups per dimension.
         * It cannot happen that for say row dimension sliced by two attributes contains, the resulting sheet
         * would have different number of header items in the two header groups that represent the respective
         * attribute elements.
         *
         * Cartesian is done on the attribute elements.
         */
        const dataResult = [
            [
                ["rowHeader1", "rowHeader2", "rowHeader3", "rowHeader4", "rowHeader5"],
                ["rowHeader1", "rowHeader2", "rowHeader3"],
            ],
            [["colHeader1", "colHeader1", "colHeader1"]],
        ];

        const expectedSizeArray = [5, 3];

        expect(getSizeFromHeaders(dataResult)).toEqual(expectedSizeArray);
    });
});