Function assertPathEqualToDataPoints

test/testMethods.ts:421–452

(path: string, data: {x: number, y: number}[],
                                            xScale: Plottable.QuantitativeScale<any>, yScale: Plottable.QuantitativeScale<any>)

}

export function assertPathEqualToDataPoints(path: string, data: {x: number, y: number}[],
                                            xScale: Plottable.QuantitativeScale<any>, yScale: Plottable.QuantitativeScale<any>) {
  const EPSILON = 0.0001;
  const lineEdges = normalizePath(path).match(/([MmLl](\-?\d+\.?\d*)(,|\s)(-?\d+\.?\d*)|([HhVv](\-?\d+\.?\d*)))/g);
  assert.strictEqual(lineEdges.length, data.length, "correct number of edges drawn");
  lineEdges.forEach((edge, i) => {
    const command = edge[0];
    const coordinates = edge.slice(1).split(/,|\s/);
    switch (command) {
      case "M":
      case "m":
      case "L":
      case "l":
        assert.strictEqual(coordinates.length, 2, "There is an x coordinate and a y coordinate");
        assertPointsClose({ x: xScale.invert(+coordinates[0]), y: yScale.invert(+coordinates[1]) },
          data[i], EPSILON, `Point ${i} drawn, has correct coordinates`);
        break;
      case "H":
      case "h":
        assert.strictEqual(coordinates.length, 1, "There is an x coordinate");
        assert.closeTo(xScale.invert(+coordinates[0]), data[i].x, EPSILON,
          `Point ${i} drawn, has correct x coordinate`);
        break;
      case "V":
      case "v":
        assert.strictEqual(coordinates.length, 1, "There is a y coordinate");
        assert.closeTo(yScale.invert(+coordinates[0]), data[i].y, EPSILON,
          `Point ${i} drawn, has correct y coordinate`);
        break;
    }
  });
}