@netdata/charts/dist/es6/helpers/limitRange/index.test.js

Netdata frontend SDK and chart utilities

import limitRange from "./index";
describe("limitRange", function () {
  it("keeps range when duration exceeds minimum", function () {
    var range = {
      after: 100,
      before: 200
    };
    var result = limitRange(range);
    expect(result).toEqual({
      fixedAfter: 100,
      fixedBefore: 200
    });
  });
  it("expands range when duration is less than minimum", function () {
    var range = {
      after: 100,
      before: 130
    };
    var result = limitRange(range);
    expect(result.fixedBefore - result.fixedAfter).toBe(60);
    expect(result.fixedAfter).toBeLessThan(100);
    expect(result.fixedBefore).toBeGreaterThan(130);
  });
  it("handles even duration expansion", function () {
    var range = {
      after: 100,
      before: 150
    };
    var result = limitRange(range);
    expect(result).toEqual({
      fixedAfter: 95,
      fixedBefore: 155
    });
  });
  it("handles odd duration expansion", function () {
    var range = {
      after: 100,
      before: 149
    };
    var result = limitRange(range);
    expect(result).toEqual({
      fixedAfter: 93.5,
      fixedBefore: 154.5
    });
  });
  it("uses default before value of 0", function () {
    var range = {
      after: -30
    };
    var result = limitRange(range);
    expect(result.fixedBefore - result.fixedAfter).toBe(60);
  });
  it("handles minimum duration exactly", function () {
    var range = {
      after: 0,
      before: 60
    };
    var result = limitRange(range);
    expect(result).toEqual({
      fixedAfter: 0,
      fixedBefore: 60
    });
  });
});