@dpkit/table/build/field/checks/minLength.spec.js

Data Package implementation in TypeScript.

import { DataFrame } from "nodejs-polars";
import { describe, expect, it } from "vitest";
import { inspectTable } from "../../table/index.js";
describe("inspectTable (cell/minLength)", () => {
    it("should not report errors for string values that meet the minLength constraint", async () => {
        const table = DataFrame({
            code: ["A123", "B456", "C789"],
        }).lazy();
        const schema = {
            fields: [
                {
                    name: "code",
                    type: "string",
                    constraints: { minLength: 3 },
                },
            ],
        };
        const errors = await inspectTable(table, { schema });
        expect(errors).toHaveLength(0);
    });
    it("should report an error for strings that are too short", async () => {
        const table = DataFrame({
            username: ["bob", "a", "christopher", "ab"],
        }).lazy();
        const schema = {
            fields: [
                {
                    name: "username",
                    type: "string",
                    constraints: { minLength: 3 },
                },
            ],
        };
        const errors = await inspectTable(table, { schema });
        expect(errors.filter(e => e.type === "cell/minLength")).toHaveLength(2);
        expect(errors).toContainEqual({
            type: "cell/minLength",
            fieldName: "username",
            rowNumber: 2,
            cell: "a",
        });
        expect(errors).toContainEqual({
            type: "cell/minLength",
            fieldName: "username",
            rowNumber: 4,
            cell: "ab",
        });
    });
});
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