const test = require('node:test');
const assert = require('node:assert/strict');

const { loadModelCurve } = require('../../src/curves/curveLoader');

test('curveLoader: valid model returns rawCurve and null error', () => {
  const result = loadModelCurve('hidrostal-H05K-S03R');
  assert.equal(result.error, null);
  assert.ok(result.rawCurve);
  assert.ok(result.rawCurve.np);
  assert.ok(result.rawCurve.nq);
});

test('curveLoader: missing model returns Model not specified', () => {
  const result = loadModelCurve('');
  assert.equal(result.rawCurve, null);
  assert.equal(result.error, 'Model not specified');
});

test('curveLoader: undefined model returns Model not specified', () => {
  const result = loadModelCurve(undefined);
  assert.equal(result.rawCurve, null);
  assert.equal(result.error, 'Model not specified');
});

test('curveLoader: unknown model returns Curve not found error', () => {
  const result = loadModelCurve('this-model-does-not-exist');
  assert.equal(result.rawCurve, null);
  assert.match(result.error, /Curve not found for model/);
});