Pier_v1/tests/p1-regression.test.ts

import { describe, expect, it } from 'vitest';
import { buildPier } from '../src/core/geometry';
import { loadP1 } from './helpers';

/**
 * Regression against spec.md §12 (P1, 운곡교, T형, 말뚝기초).
 * Coordinates and EL: ±1 mm (0.001 m). Angles: ±0.01°.
 */
const TOL = 0.001;
const model = buildPier(loadP1());

describe('P1 regression — spec.md §12', () => {
  it('axis length and azimuth', () => {
    expect(model.lengthIp).toBeCloseTo(12.166, 3);
    expect(model.azimuthDeg).toBeCloseTo(350.37, 2);
  });

  it('BP1, BP2 coordinates (국토좌표 E, N)', () => {
    expect(model.bp1.e).toBeCloseTo(259866.681, 2);
    expect(model.bp1.n).toBeCloseTo(179132.173, 2);
    expect(Math.abs(model.bp2.e - 259864.674)).toBeLessThan(TOL);
    expect(Math.abs(model.bp2.n - 179144.004)).toBeLessThan(TOL);
  });

  it('IP2 reference recalculation and d_IP2', () => {
    expect(Math.abs(model.dIp2 - 1.134)).toBeLessThan(TOL);
  });

  it('column centre coordinates', () => {
    expect(Math.abs(model.pivot.e - 259865.677)).toBeLessThan(TOL);
    expect(Math.abs(model.pivot.n - 179138.089)).toBeLessThan(TOL);
  });

  it('bearing positions: front row across-axis −0.698, back row +0.600; front s from 0.943 to 10.965', () => {
    const front = model.bearings.filter((b) => b.row === '전열');
    const back = model.bearings.filter((b) => b.row === '후열');
    expect(front[0].n).toBeCloseTo(-0.698, 3);
    expect(back[0].n).toBeCloseTo(0.6, 3);
    expect(front[0].s).toBeCloseTo(0.943, 3);
    expect(front[4].s).toBeCloseTo(10.965, 3);
    expect(back[0].s).toBeCloseTo(1.029, 3);
    expect(back[4].s).toBeCloseTo(11.05, 3);
  });

  it('step boundaries at the midpoints of front bearings: 2.196 / 4.701 / 7.207 / 9.712', () => {
    const bounds = model.segments.slice(1).map((s) => s.s0);
    [2.196, 4.701, 7.207, 9.712].forEach((b, i) => expect(Math.abs(bounds[i] - b)).toBeLessThan(TOL));
  });

  it('front segment tops: 43.411 / 43.483 / 43.555 / 43.626 / 43.698', () => {
    const tops = model.segments.map((s) => s.top);
    [43.411, 43.483, 43.555, 43.626, 43.698].forEach((t, i) => expect(Math.abs(tops[i] - t)).toBeLessThan(TOL));
  });

  it('bearing block heights: h1 = 150, h2 = 200 mm; concrete 100 / 150 mm', () => {
    expect(model.h1).toBeCloseTo(0.15, 6);
    expect(model.h2).toBeCloseTo(0.2, 6);
    expect(model.derived.blockHeightFront).toBeCloseTo(0.1, 6);
    expect(model.derived.blockHeightBack).toBeCloseTo(0.15, 6);
  });

  it('no lateral step (front and back tops agree)', () => {
    expect(model.derived.frontBackDiffSpread).toBeLessThan(0.0051);
  });

  it('coping bottom: 42.411 at the ends, 40.911 at the Level zone', () => {
    expect(Math.abs(model.endBottom - 42.411)).toBeLessThan(TOL);
    expect(Math.abs(model.levelBottom - 40.911)).toBeLessThan(TOL);
  });

  it('column height 12.703 m and footing top 28.208 m, soil cover 0.723 m', () => {
    expect(Math.abs(model.derived.columnHeight - 12.703)).toBeLessThan(TOL);
    expect(Math.abs(model.footings[0].top - 28.208)).toBeLessThan(TOL);
    expect(Math.abs(model.derived.soilCover - 0.723)).toBeLessThan(TOL);
  });

  it('piles: 4 rows × 5 = 20, spacing 2250 mm, tip at 2.208 m', () => {
    expect(model.piles).toHaveLength(20);
    expect(model.derived.pileCount).toBe(20);
    expect(Math.abs((model.derived.pileTipEl ?? NaN) - 2.208)).toBeLessThan(TOL);
    const sValues = [...new Set(model.piles.map((p) => p.s.toFixed(4)))];
    const nValues = [...new Set(model.piles.map((p) => p.n.toFixed(4)))];
    expect(sValues).toHaveLength(5);
    expect(nValues).toHaveLength(4);
    expect(Number(nValues[1]) - Number(nValues[0])).toBeCloseTo(2.25, 4);
    expect(Number(sValues[1]) - Number(sValues[0])).toBeCloseTo(2.25, 4);
  });

  it('blinding concrete 10600 × 8350 × 100 under the footing', () => {
    const b = model.blindings[0];
    expect(b.length).toBeCloseTo(10.6, 4);
    expect(b.width).toBeCloseTo(8.35, 4);
    expect(b.thickness).toBeCloseTo(0.1, 4);
  });

  it('footing 10400 × 8150 × 2000 mm', () => {
    const f = model.footings[0];
    expect(f.length).toBeCloseTo(10.4, 4);
    expect(f.width).toBeCloseTo(8.15, 4);
    expect(f.top - f.bottom).toBeCloseTo(2.0, 4);
  });
});

describe('pile layout text (spec §12, §6.8 display)', () => {
  it('reads 4@2250 × 3@2250 = 20본', () => {
    expect(model.derived.pileLayout).toBe('4@2250 × 3@2250 = 20본');
  });
});