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import { test, testModule, deepEqual } from './testutils.js'import Enumerable from '../linq.js'
testModule("Grouping");
var fileList = ["temp.xls", "temp2.xls", "temp.pdf", "temp.jpg", "temp2.pdf", "temp3.xls"];
test("groupBy", function (){    let actual = Enumerable.from(fileList)        .groupBy("file=>file.match(/\\.(.+$)/)[1]")        .select("{key:$.key(),value:$.toArray()}")        .toArray();    let expected = [{ key: "xls", value: ["temp.xls", "temp2.xls", "temp3.xls"] },                { key: "pdf", value: ["temp.pdf", "temp2.pdf"] },                { key: "jpg", value: ["temp.jpg"]}];    deepEqual(actual, expected);
    actual = Enumerable.from(fileList)        .groupBy("file=>file.match(/\\.(.+$)/)[1]", "file=>file.match(/(^.+)\\..+$/)[1]")        .select("{key:$.key(),value:$.toArray()}")        .toArray();    expected = [{ key: "xls", value: ["temp", "temp2", "temp3"] },                { key: "pdf", value: ["temp", "temp2"] },                { key: "jpg", value: ["temp"]}];    deepEqual(actual, expected);
    actual = Enumerable.from(fileList).groupBy("file=>file.match(/\\.(.+$)/)[1]",        "file=>file",        "ext,group => {extension:ext,count:group.count(),files:group.toArray()}")        .toArray();    expected = [{ extension: "xls", count: 3, files: ["temp.xls", "temp2.xls", "temp3.xls"] },                { extension: "pdf", count: 2, files: ["temp.pdf", "temp2.pdf"] },                { extension: "jpg", count: 1, files: ["temp.jpg"]}];    deepEqual(actual, expected);
    var objects = [        { Date: new Date(2000, 1, 1), Id: 1 },        { Date: new Date(2010, 5, 5), Id: 2 },        { Date: new Date(2000, 1, 1), Id: 3 }    ]    actual = Enumerable.from(objects)        .groupBy("$.Date", "$.Id",            function (key, group) { return key.getFullYear() + "-" + group.toJoinedString(',') },            function (key) { return key.toString() })        .toArray();    expected = ["2000-1,3", "2010-2"]    deepEqual(actual, expected);});
test("partitionBy", function (){    let actual = Enumerable.from(fileList)        .partitionBy("file=>file.match(/\\.(.+$)/)[1]")        .select("{key:$.key(),value:$.toArray()}")        .toArray();    let expected = [{ key: "xls", value: ["temp.xls", "temp2.xls"] },                { key: "pdf", value: ["temp.pdf"] },                { key: "jpg", value: ["temp.jpg"] },                { key: "pdf", value: ["temp2.pdf"] },                { key: "xls", value: ["temp3.xls"] }                ];    deepEqual(actual, expected);
    actual = Enumerable.from(fileList)        .partitionBy("file=>file.match(/\\.(.+$)/)[1]", "file=>file.match(/(^.+)\\..+$/)[1]")        .select("{key:$.key(),value:$.toArray()}")        .toArray();    expected = [{ key: "xls", value: ["temp", "temp2"] },                { key: "pdf", value: ["temp"] },                { key: "jpg", value: ["temp"] },                { key: "pdf", value: ["temp2"] },                { key: "xls", value: ["temp3"] }                ];    deepEqual(actual, expected);
    actual = Enumerable.from(fileList)        .partitionBy("file=>file.match(/\\.(.+$)/)[1]",            "file=>file",            "ext,group=>{extension:ext,count:group.count(),files:group.toArray()}")        .toArray();    expected = [{ extension: "xls", count: 2, files: ["temp.xls", "temp2.xls"] },                { extension: "pdf", count: 1, files: ["temp.pdf"] },                { extension: "jpg", count: 1, files: ["temp.jpg"] },                { extension: "pdf", count: 1, files: ["temp2.pdf"] },                { extension: "xls", count: 1, files: ["temp3.xls"] }                ];    deepEqual(actual, expected);
    var objects = [        { Date: new Date(2000, 1, 1), Id: 1 },        { Date: new Date(2000, 1, 1), Id: 2 },        { Date: new Date(2010, 5, 5), Id: 3 },        { Date: new Date(2000, 1, 1), Id: 4 },        { Date: new Date(2010, 5, 5), Id: 5 },        { Date: new Date(2010, 5, 5), Id: 6 }    ]    actual = Enumerable.from(objects)        .partitionBy("$.Date", "$.Id",            function (key, group) { return key.getFullYear() + "-" + group.toJoinedString(',') },            function (key) { return key.toString() })        .toArray();    expected = ["2000-1,2", "2010-3", "2000-4", "2010-5,6"]    deepEqual(actual, expected);});
test("buffer", function (){    let actual = Enumerable.range(1, 10).buffer("3").toArray();    let expected = [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10]];    deepEqual(actual, expected);});