pacificclimate/climate-explorer-frontend

/* ***************************************************************
 * chart-accessor-tests.js - tests for chart access functions
 *
 * One test (sometimes with multiple parts) for each function in
 * chart-accessor-tests.js. The tests have the same names and are
 * in the same order as the functions.
 *
 * test data from ../_test_data__/sample-API-results.js
 *****************************************************************/

import {
  hasTwoYAxes,
  checkYAxisValidity,
  yAxisUnits,
  yAxisRange,
} from "../chart-accessors";
import { timeseriesToAnnualCycleGraph } from "../chart-generators";
import {
  monthlyTasmaxTimeseries,
  seasonalTasmaxTimeseries,
  annualTasmaxTimeseries,
  monthlyPrTimeseries,
  metadataToArray,
} from "../__test_data__/sample-API-results";
import _ from "lodash";

jest.dontMock("../chart-accessors");
jest.dontMock("lodash");

describe("hasTwoYAxes", function () {
  const metadata = metadataToArray();
  it("detects graphs that have only 1 y-axis", function () {
    const graph = timeseriesToAnnualCycleGraph(
      metadata,
      monthlyTasmaxTimeseries,
      seasonalTasmaxTimeseries,
      annualTasmaxTimeseries,
    );
    expect(hasTwoYAxes(graph)).toBeFalsy();
  });
  it("detects graphs that have 2 y-axes", function () {
    const graph = timeseriesToAnnualCycleGraph(
      metadataToArray(),
      monthlyTasmaxTimeseries,
      monthlyPrTimeseries,
    );
    expect(hasTwoYAxes(graph)).toBeTruthy();
  });
});

describe("checkYAxisValidity", function () {
  const graph = timeseriesToAnnualCycleGraph(
    metadataToArray(),
    monthlyTasmaxTimeseries,
    monthlyPrTimeseries,
  );
  it("does nothing for valid axes", function () {
    let func = function () {
      checkYAxisValidity(graph, "y");
    };
    expect(func).not.toThrow();
    func = function () {
      checkYAxisValidity(graph, "y2");
    };
    expect(func).not.toThrow();
  });
  it("throws an eror for invalid axes", function () {
    let func = function () {
      checkYAxisValidity(graph, "banana");
    };
    expect(func).toThrow();
  });
});

describe("yAxisUnits", function () {
  const graph = timeseriesToAnnualCycleGraph(
    metadataToArray(),
    monthlyTasmaxTimeseries,
    monthlyPrTimeseries,
  );
  it("returns the units associated with the y axis", function () {
    expect(yAxisUnits(graph, "y")).toBe("degC");
    expect(yAxisUnits(graph, "y2")).toBe("kg m-2 d-1");
  });
});

describe("yAxisRange", function () {
  const graph = timeseriesToAnnualCycleGraph(
    metadataToArray(),
    monthlyTasmaxTimeseries,
    monthlyPrTimeseries,
  );
  const monthlyTasmaxTimeseriesData = _.map(monthlyTasmaxTimeseries.data);
  const monthlyPrTimeseriesData = _.map(monthlyPrTimeseries.data);
  it("calculates the min and max of data associated with a y-axis", function () {
    expect(yAxisRange(graph, "y").min).toBe(_.min(monthlyTasmaxTimeseriesData));
    expect(yAxisRange(graph, "y").max).toBe(_.max(monthlyTasmaxTimeseriesData));
    expect(yAxisRange(graph, "y2").min).toBe(_.min(monthlyPrTimeseriesData));
    expect(yAxisRange(graph, "y2").max).toBe(_.max(monthlyPrTimeseriesData));
  });
});