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CapaKraken/apps/web/src/lib/excel.test.ts
T

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TypeScript

import { describe, expect, it } from "vitest";
import {
MAX_BROWSER_SPREADSHEET_BYTES,
assertSpreadsheetFile,
parseSpreadsheet,
} from "./excel.js";
async function createWorkbookFile(
rows: unknown[][],
fileName = "spreadsheet.xlsx",
): Promise<File> {
const ExcelJS = await import("exceljs");
const workbook = new ExcelJS.Workbook();
const worksheet = workbook.addWorksheet("Sheet1");
for (const row of rows) {
worksheet.addRow(row);
}
const buffer = await workbook.xlsx.writeBuffer();
return new File([buffer], fileName, {
type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
});
}
describe("excel import helpers", () => {
it("parses csv files with quoted values and skips blank rows", async () => {
const file = new File(
['name,role\n"Alice, A.",Engineer\n\nBob,Producer\n'],
"people.csv",
{ type: "text/csv" },
);
await expect(parseSpreadsheet(file)).resolves.toEqual([
{ name: "Alice, A.", role: "Engineer" },
{ name: "Bob", role: "Producer" },
]);
});
it("parses xlsx files and normalizes date cells to ISO strings", async () => {
const file = await createWorkbookFile([
["name", "startDate", "active"],
["Alice", new Date("2026-03-30T09:15:00.000Z"), true],
]);
await expect(parseSpreadsheet(file)).resolves.toEqual([
{
name: "Alice",
startDate: "2026-03-30T09:15:00.000Z",
active: "true",
},
]);
});
it("rejects duplicate headers in xlsx imports", async () => {
const file = await createWorkbookFile([
["Name", "name"],
["Alice", "Producer"],
]);
await expect(parseSpreadsheet(file)).rejects.toThrow('duplicate header "name"');
});
it("rejects legacy .xls uploads before parsing", () => {
const file = new File(["legacy"], "legacy.xls", {
type: "application/vnd.ms-excel",
});
expect(() => assertSpreadsheetFile(file)).toThrow(
"Legacy .xls files are not supported.",
);
});
it("rejects oversized spreadsheet uploads before parsing", () => {
const file = new File([Buffer.alloc(MAX_BROWSER_SPREADSHEET_BYTES + 1)], "oversized.xlsx", {
type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
});
expect(() => assertSpreadsheetFile(file)).toThrow(
`The selected file exceeds the ${MAX_BROWSER_SPREADSHEET_BYTES} byte limit`,
);
});
});