semantic-ds-toolkit/dist/test/operators/dataframe-join-adapters-lazyframe.test.js

Performance-first semantic layer for modern data stacks - Stable Column Anchors & intelligent inference

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const dataframe_join_adapters_1 = require("../../src/operators/dataframe-join-adapters");
describe('Operators: Polars LazyFrame collect path', () => {
    it('handles LazyFrame by collecting before conversion', () => {
        const df = {
            columns: ['x'],
            data: { x: [1, 2, 3] },
            getColumns: () => ['x'],
            dtypes: () => ['Int64'],
            getColumn: (name) => ({ toArray: () => [1, 2, 3], toList: () => [1, 2, 3] }),
        };
        const lazy = {
            constructor: { name: 'LazyFrame' },
            collect: () => df,
            getColumns: () => ['x'],
        };
        const adapter = (0, dataframe_join_adapters_1.getJoinAdapter)(lazy);
        expect(adapter).toBeInstanceOf(dataframe_join_adapters_1.PolarsJoinAdapter);
        const dfLike = adapter.toDataFrameLike(lazy);
        expect(dfLike.columns).toEqual(['x']);
        const res = adapter.fromJoinResult({ data: [{ x: 1 }, { x: 2 }] }, lazy, lazy, {});
        expect(res.width).toBeGreaterThan(0);
    });
});
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