"use strict";

var sinon = require("sinon");
var EventEmitter = require("node:events").EventEmitter;
var Mocha = require("../../lib/mocha");
var utils = require("../../lib/utils");
const errors = require("../../lib/errors");

describe("Mocha", function () {
  /**
   * Options for `Mocha` constructor
   */
  var opts;

  /**
   * Stub `Runner` constructor; returns a stubbed `EventEmitter`
   */
  var Runner;

  /**
   * Stub `Suite` constructor; returns a stubbed `EventEmitter`
   */
  var Suite;

  /**
   * Stub `Suite` instance (root suite in our case)
   */
  var suite;

  /**
   * Stub `Runner` (`EventEmitter`) instance
   */
  var runner;

  /**
   * Stub `Base` reporter constructor
   */
  var Base;

  /**
   * Instance of a hypothetical reporter
   */
  var reporterInstance;

  beforeEach(function () {
    reporterInstance = {};
    opts = { reporter: sinon.stub().returns(reporterInstance) };

    // NOTE: calling `stub(someObject, someFunction)` where `someFunction` has
    // its own static properties WILL NOT blast those static properties!
    Base = sinon.stub(Mocha.reporters, "Base").returns({});
    sinon.stub(Mocha.reporters, "base").returns({});
    sinon.stub(Mocha.reporters, "spec").returns({});

    runner = {
      ...sinon.createStubInstance(EventEmitter),
      runAsync: sinon.stub().resolves(0),
      globals: sinon.stub(),
      grep: sinon.stub(),
      dispose: sinon.stub(),
    };
    Runner = sinon.stub(Mocha, "Runner").returns(runner);
    // the Runner constructor is the main export, and constants is a static prop.
    // we don't need the constants themselves, but the object cannot be undefined
    Runner.constants = {};
    suite = {
      ...sinon.createStubInstance(EventEmitter),
      slow: sinon.stub(),
      timeout: sinon.stub(),
      bail: sinon.stub(),
      dispose: sinon.stub(),
      reset: sinon.stub(),
      beforeAll: sinon.stub(),
      beforeEach: sinon.stub(),
      afterAll: sinon.stub(),
      afterEach: sinon.stub(),
    };
    Suite = sinon.stub(Mocha, "Suite").returns(suite);
    Suite.constants = {};

    sinon.stub(errors, "warn");
    sinon.stub(utils, "isString");
    sinon.stub(utils, "noop");
  });

  afterEach(function () {
    sinon.restore();
  });

  describe("constructor", function () {
    var mocha;

    beforeEach(function () {
      mocha = sinon.createStubInstance(Mocha);
      mocha.timeout.returnsThis();
      mocha.retries.returnsThis();
      sinon.stub(Mocha.prototype, "timeout").returnsThis();
      sinon.stub(Mocha.prototype, "global").returnsThis();
      sinon.stub(Mocha.prototype, "retries").returnsThis();
      sinon.stub(Mocha.prototype, "rootHooks").returnsThis();
      sinon.stub(Mocha.prototype, "parallelMode").returnsThis();
      sinon.stub(Mocha.prototype, "globalSetup").returnsThis();
      sinon.stub(Mocha.prototype, "globalTeardown").returnsThis();
      sinon.stub(Mocha.prototype, "enableGlobalSetup").returnsThis();
      sinon.stub(Mocha.prototype, "enableGlobalTeardown").returnsThis();
    });

    it("should set _cleanReferencesAfterRun to true", function () {
      expect(new Mocha()._cleanReferencesAfterRun, "to be", true);
    });

    describe("when `timeout` option is `undefined`", function () {
      it("should not attempt to set timeout", function () {
        // eslint-disable-next-line no-new
        new Mocha({ timeout: undefined });
        expect(Mocha.prototype.timeout, "was not called");
      });
    });

    describe("when `timeout` option is `false`", function () {
      it("should attempt to set timeout", function () {
        // eslint-disable-next-line no-new
        new Mocha({ timeout: false });
        expect(Mocha.prototype.timeout, "to have a call satisfying", [0]).and(
          "was called once",
        );
      });
    });

    describe("when `global` option is an `Array`", function () {
      it("should attempt to set globals", function () {
        // eslint-disable-next-line no-new
        new Mocha({ global: ["singular"] });
        expect(Mocha.prototype.global, "to have a call satisfying", [
          ["singular"],
        ]).and("was called once");
      });
    });

    describe("when `retries` option is present", function () {
      it("should attempt to set retries`", function () {
        // eslint-disable-next-line no-new
        new Mocha({ retries: 1 });
        expect(Mocha.prototype.retries, "to have a call satisfying", [1]).and(
          "was called once",
        );
      });
    });

    describe("when `retries` option is not present", function () {
      it("should not attempt to set retries", function () {
        // eslint-disable-next-line no-new
        new Mocha({});
        expect(Mocha.prototype.retries, "was not called");
      });
    });

    describe("when `rootHooks` option is truthy", function () {
      it("shouid attempt to set root hooks", function () {
        // eslint-disable-next-line no-new
        new Mocha({ rootHooks: ["a root hook"] });
        expect(Mocha.prototype.rootHooks, "to have a call satisfying", [
          ["a root hook"],
        ]).and("was called once");
      });
    });

    describe("when `parallel` option is true", function () {
      describe("and `jobs` option > 1", function () {
        it("should enable parallel mode", function () {
          // eslint-disable-next-line no-new
          new Mocha({ parallel: true, jobs: 2 });
          expect(Mocha.prototype.parallelMode, "to have a call satisfying", [
            true,
          ]).and("was called once");
        });
      });

      describe("and `jobs` option <= 1", function () {
        it("should not enable parallel mode", function () {
          // eslint-disable-next-line no-new
          new Mocha({ parallel: true, jobs: 1 });
          expect(Mocha.prototype.parallelMode, "was not called");
        });
      });

      describe("when `globalSetup` option is present", function () {
        it("should configure global setup fixtures", function () {
          const globalSetup = [() => {}];
          const mocha = new Mocha({ globalSetup });
          expect(mocha.globalSetup, "to have a call satisfying", [
            globalSetup,
          ]).and("was called once");
        });
      });

      describe("when `globalTeardown` option is present", function () {
        it("should configure global teardown fixtures", function () {
          const globalTeardown = [() => {}];
          const mocha = new Mocha({ globalTeardown });
          expect(mocha.globalTeardown, "to have a call satisfying", [
            globalTeardown,
          ]).and("was called once");
        });
      });

      describe("when `enableGlobalSetup` option is present", function () {
        it("should toggle global setup fixtures", function () {
          const mocha = new Mocha({ enableGlobalSetup: 1 });
          expect(mocha.enableGlobalSetup, "to have a call satisfying", [1]).and(
            "was called once",
          );
        });
      });

      describe("when `enableGlobalTeardown` option is present", function () {
        it("should configure global teardown fixtures", function () {
          const mocha = new Mocha({ enableGlobalTeardown: 1 });
          expect(mocha.enableGlobalTeardown, "to have a call satisfying", [
            1,
          ]).and("was called once");
        });
      });
    });
  });

  describe("instance method", function () {
    var mocha;

    beforeEach(function () {
      mocha = new Mocha(opts);
    });

    describe("allowUncaught()", function () {
      it("should set the allowUncaught option to true", function () {
        mocha.allowUncaught();
        expect(mocha.options, "to have property", "allowUncaught", true);
      });

      it("should set the allowUncaught option to false", function () {
        mocha.allowUncaught(false);
        expect(mocha.options, "to have property", "allowUncaught", false);
      });

      it("should be chainable", function () {
        expect(mocha.allowUncaught(), "to be", mocha);
      });
    });

    describe("asyncOnly()", function () {
      it("should set the asyncOnly option to true", function () {
        mocha.asyncOnly();
        expect(mocha.options, "to have property", "asyncOnly", true);
      });

      it("should set the asyncOnly option to false", function () {
        mocha.asyncOnly(false);
        expect(mocha.options, "to have property", "asyncOnly", false);
      });

      it("should be chainable", function () {
        expect(mocha.asyncOnly(), "to be", mocha);
      });
    });

    describe("bail()", function () {
      it('should set the "bail" flag on the root suite', function () {
        mocha.bail();
        expect(suite.bail, "to have a call satisfying", [true]).and(
          "was called once",
        );
      });

      it('should unset the "bail" flag on the root suite', function () {
        mocha.bail(false);
        expect(suite.bail, "to have a call satisfying", [false]).and(
          "was called once",
        );
      });

      it("should be chainable", function () {
        expect(mocha.bail(), "to be", mocha);
      });
    });

    describe("checkLeaks()", function () {
      it("should set the checkLeaks option to true", function () {
        mocha.checkLeaks();
        expect(mocha.options, "to have property", "checkLeaks", true);
      });
    });

    describe("cleanReferencesAfterRun()", function () {
      it("should set the _cleanReferencesAfterRun attribute", function () {
        mocha.cleanReferencesAfterRun();
        expect(mocha._cleanReferencesAfterRun, "to be", true);
      });

      it("should set the _cleanReferencesAfterRun attribute to false", function () {
        mocha.cleanReferencesAfterRun(false);
        expect(mocha._cleanReferencesAfterRun, "to be", false);
      });

      it("should be chainable", function () {
        expect(mocha.cleanReferencesAfterRun(), "to be", mocha);
      });
    });

    describe("color()", function () {
      it("should set the color option to true", function () {
        mocha.color();
        expect(mocha.options, "to have property", "color", true);
      });

      it("should set the color option to false", function () {
        mocha.color(false);
        expect(mocha.options, "to have property", "color", false);
      });

      it("should be chainable", function () {
        expect(mocha.color(), "to be", mocha);
      });
    });

    describe("delay()", function () {
      it("should set the delay option to true", function () {
        mocha.delay();
        expect(mocha.options, "to have property", "delay", true);
      });

      it("should be chainable", function () {
        expect(mocha.delay(), "to be", mocha);
      });
    });

    describe("diff()", function () {
      it("should set the diff option to true", function () {
        mocha.diff();
        expect(mocha.options, "to have property", "diff", true);
      });

      it("should set the diff option to false", function () {
        mocha.diff(false);
        expect(mocha.options, "to have property", "diff", false);
      });
    });

    describe("dispose()", function () {
      it("should dispose the root suite", function () {
        mocha.dispose();
        expect(suite.dispose, "was called once");
      });

      it("should dispose previous test runner", function () {
        mocha._previousRunner = runner;
        mocha.dispose();
        expect(runner.dispose, "was called once");
      });

      it("should unload the files", function () {
        var unloadFilesStub = sinon.stub(mocha, "unloadFiles");
        mocha.dispose();
        expect(unloadFilesStub, "was called once");
      });
    });

    describe("dryRun()", function () {
      it("should set the dryRun option to true", function () {
        mocha.dryRun();
        expect(mocha.options, "to have property", "dryRun", true);
      });

      it("should set the dryRun option to false", function () {
        mocha.dryRun(false);
        expect(mocha.options, "to have property", "dryRun", false);
      });
    });

    describe("passOnFailingTestSuite()", function () {
      it("should set the passOnFailingTestSuite option to false", function () {
        mocha.passOnFailingTestSuite();
        expect(
          mocha.options,
          "to have property",
          "passOnFailingTestSuite",
          false,
        );
      });

      it("should set the passOnFailingTestSuite option to true", function () {
        mocha.passOnFailingTestSuite(true);
        expect(
          mocha.options,
          "to have property",
          "passOnFailingTestSuite",
          true,
        );
      });
    });

    describe("failZero()", function () {
      it("should set the failZero option to true", function () {
        mocha.failZero();
        expect(mocha.options, "to have property", "failZero", true);
      });

      it("should set the failZero option to false", function () {
        mocha.failZero(false);
        expect(mocha.options, "to have property", "failZero", false);
      });
    });

    describe("forbidOnly()", function () {
      it("should set the forbidOnly option to true", function () {
        mocha.forbidOnly();
        expect(mocha.options, "to have property", "forbidOnly", true);
      });

      it("should set the forbidOnly option to false", function () {
        mocha.forbidOnly(false);
        expect(mocha.options, "to have property", "forbidOnly", false);
      });

      it("should be chainable", function () {
        expect(mocha.forbidOnly(), "to be", mocha);
      });
    });

    describe("forbidPending()", function () {
      it("should set the forbidPending option to true", function () {
        mocha.forbidPending();
        expect(mocha.options, "to have property", "forbidPending", true);
      });

      it("should set the forbidPending option to false", function () {
        mocha.forbidPending(false);
        expect(mocha.options, "to have property", "forbidPending", false);
      });

      it("should be chainable", function () {
        expect(mocha.forbidPending(), "to be", mocha);
      });
    });

    describe("fullTrace()", function () {
      it("should set the fullTrace option to true", function () {
        mocha.fullTrace();
        expect(mocha.options, "to have property", "fullTrace", true);
      });

      it("should set the fullTrace option to false", function () {
        mocha.fullTrace(false);
        expect(mocha.options, "to have property", "fullTrace", false);
      });

      it("should be chainable", function () {
        expect(mocha.fullTrace(), "to be", mocha);
      });
    });

    describe("global()", function () {
      it("should be an empty array initially", function () {
        expect(mocha.options.global, "to be empty");
      });

      it("should be chainable", function () {
        expect(mocha.global(), "to be", mocha);
      });

      describe("when argument is invalid", function () {
        it("should not modify the whitelist when given empty string", function () {
          mocha.global("");
          expect(mocha.options.global, "to be empty");
        });

        it("should not modify the whitelist when given empty array", function () {
          mocha.global([]);
          expect(mocha.options.global, "to be empty");
        });
      });

      describe("when argument is valid", function () {
        var elem = "foo";
        var elem2 = "bar";
        var elem3 = "baz";

        it("should add string to the whitelist", function () {
          mocha.global(elem);
          expect(mocha.options.global, "to contain", elem);
          expect(mocha.options.global, "to have length", 1);
        });

        it("should add contents of string array to the whitelist", function () {
          var elems = [elem, elem2];
          mocha.global(elems);
          expect(mocha.options.global, "to contain", elem, elem2);
          expect(mocha.options.global, "to have length", elems.length);
        });

        it("should not have duplicates", function () {
          var mocha = new Mocha({ global: [elem, elem2] });
          var elems = [elem, elem2, elem3];
          mocha.global(elems);
          expect(mocha.options.global, "to contain", elem, elem2, elem3);
          expect(mocha.options.global, "to have length", elems.length);
        });
      });
    });

    describe("inlineDiffs()", function () {
      it("should set the inlineDiffs option to true", function () {
        mocha.inlineDiffs();
        expect(mocha.options, "to have property", "inlineDiffs", true);
      });

      it("should set the inlineDiffs option to false", function () {
        mocha.inlineDiffs(false);
        expect(mocha.options, "to have property", "inlineDiffs", false);
      });

      it("should be chainable", function () {
        expect(mocha.inlineDiffs(), "to be", mocha);
      });
    });

    describe("invert()", function () {
      it("should set the invert option to true", function () {
        mocha.invert();
        expect(mocha.options, "to have property", "invert", true);
      });

      it("should be chainable", function () {
        expect(mocha.invert(), "to be", mocha);
      });
    });

    describe("noHighlighting()", function () {
      // :NOTE: Browser-only option...
      it("should set the noHighlighting option to true", function () {
        mocha.noHighlighting();
        expect(mocha.options, "to have property", "noHighlighting", true);
      });

      it("should be chainable", function () {
        expect(mocha.noHighlighting(), "to be", mocha);
      });
    });

    describe("reporter()", function () {
      it("should be chainable", function () {
        expect(mocha.reporter(), "to be", mocha);
      });

      it("should keep reporterOption on options", function () {
        var mocha = new Mocha({
          reporter: "spec",
          reporterOption: {
            foo: "bar",
          },
        });
        expect(mocha.options.reporterOption, "to have property", "foo", "bar");
        // To support the legacy property name that can be used by reporters
        expect(mocha.options.reporterOptions, "to have property", "foo", "bar");
      });

      it("should support legacy reporterOptions", function () {
        var mocha = new Mocha({
          reporter: "spec",
          reporterOptions: {
            foo: "bar",
          },
        });
        expect(mocha.options.reporterOption, "to have property", "foo", "bar");
        // To support the legacy property name that can be used by reporters
        expect(mocha.options.reporterOptions, "to have property", "foo", "bar");
      });
    });

    describe("run()", function () {
      let globalFixtureContext;

      beforeEach(function () {
        globalFixtureContext = {};
        sinon.stub(mocha, "runGlobalSetup").returns(globalFixtureContext);
        sinon.stub(mocha, "runGlobalTeardown").returns(globalFixtureContext);
      });

      describe("when files have been added to the Mocha instance", function () {
        beforeEach(function () {
          sinon.stub(mocha, "loadFiles");
          mocha.addFile("some-file.js");
        });

        describe("when Mocha is set to eagerly load files", function () {
          it("should eagerly load files", function (done) {
            mocha.run(function () {
              expect(mocha.loadFiles, "was called once");
              done();
            });
          });
        });

        describe("when Mocha is set to lazily load files", function () {
          beforeEach(function () {
            mocha.lazyLoadFiles(true);
          });

          it("should not eagerly load files", function (done) {
            mocha.run(function () {
              expect(mocha.loadFiles, "was not called");
              done();
            });
          });
        });
      });

      describe("Runner initialization", function () {
        it("should instantiate a Runner", function (done) {
          mocha.run(function () {
            expect(Runner, "to have a call satisfying", {
              calledWithNew: true,
              args: [
                mocha.suite,
                {
                  delay: mocha.options.delay,
                  cleanReferencesAfterRun:
                    mocha.options.cleanReferencesAfterRun,
                },
              ],
            }).and("was called once");
            done();
          });
        });

        describe('when "grep" option is present', function () {
          beforeEach(function () {
            mocha.options.grep = /foo/;
            mocha.options.invert = false;
          });

          it('should configure "grep"', function (done) {
            mocha.run(function () {
              expect(runner.grep, "to have a call satisfying", [
                mocha.options.grep,
                mocha.options.invert,
              ]).and("was called once");
              done();
            });
          });
        });

        describe('when "global" option is present', function () {
          beforeEach(function () {
            mocha.options.global = ["foo", "bar"];
          });

          it("should configure global vars", function (done) {
            mocha.run(function () {
              expect(runner.globals, "to have a call satisfying", [
                mocha.options.global,
              ]).and("was called once");
              done();
            });
          });
        });
      });

      describe("Base reporter initialization", function () {
        beforeEach(function () {
          mocha.options.inlineDiffs = "some value";
          mocha.options.diff = false;
        });

        describe('when "color" options is set', function () {
          beforeEach(function () {
            mocha.options.color = "truthy";
          });

          it("should configure the Base reporter", function (done) {
            mocha.run(function () {
              expect(Base, "to satisfy", {
                inlineDiffs: "some value",
                hideDiff: true,
                useColors: "truthy",
              });
              done();
            });
          });
        });

        it("should configure the Base reporter", function (done) {
          mocha.run(function () {
            expect(Base, "to satisfy", {
              inlineDiffs: "some value",
              hideDiff: true,
            });
            done();
          });
        });
      });

      it("should instantiate a reporter", function (done) {
        mocha.run(function () {
          expect(opts.reporter, "to have a call satisfying", {
            calledWithNew: true,
            args: [runner, mocha.options],
          }).and("was called once");
          done();
        });
      });

      // TODO: figure out how to stub the stats collector
      it("should initialize the stats collector");

      describe('when a reporter instance has a "done" method', function () {
        beforeEach(function () {
          reporterInstance.done = sinon.stub().callsArgAsync(1);
        });

        it('should call the reporter "done" method', function (done) {
          mocha.run(function () {
            expect(reporterInstance.done, "was called once");
            done();
          });
        });
      });

      it("should execute the callback when complete", function (done) {
        mocha.run(done);
      });

      describe("when a run is in progress", function () {
        it("should throw", function (done) {
          mocha.run(done); // this is async!
          expect(
            function () {
              mocha.run();
            },
            "to throw",
            {
              code: "ERR_MOCHA_INSTANCE_ALREADY_RUNNING",
              instance: mocha,
            },
          );
        });

        it("should not call `Runner#runAsync`", function (done) {
          mocha.run(done); // this is async!
          try {
            mocha.run();
          } catch (ignored) {
          } finally {
            // it'll be 0 or 1, depending on timing.
            expect(runner.runAsync.callCount, "to be less than", 2);
          }
        });
      });

      describe("when the `Mocha` instance is already disposed", function () {
        beforeEach(function () {
          mocha.dispose();
        });

        it("should throw", function () {
          expect(
            function () {
              mocha.run();
            },
            "to throw",
            {
              code: "ERR_MOCHA_INSTANCE_ALREADY_DISPOSED",
              cleanReferencesAfterRun: true,
              instance: mocha,
            },
          );
        });

        it("should not call `Runner#runAsync`", function () {
          try {
            mocha.run();
          } catch (ignored) {
          } finally {
            expect(runner.runAsync, "was not called");
          }
        });
      });

      describe("when a run has finished and is called again", function () {
        beforeEach(function (done) {
          mocha.run(function () {
            runner.runAsync.reset();
            done();
          });
        });

        it("should throw", function () {
          expect(
            function () {
              mocha.run();
            },
            "to throw",
            {
              code: "ERR_MOCHA_INSTANCE_ALREADY_DISPOSED",
              instance: mocha,
            },
          );
        });

        it("should not call `Runner#runAsync()`", function () {
          try {
            mocha.run();
          } catch (ignored) {
          } finally {
            expect(runner.runAsync, "was not called");
          }
        });
      });

      describe("when Mocha configured for multiple runs and multiple runs are attempted", function () {
        beforeEach(function () {
          mocha.cleanReferencesAfterRun(false);
        });

        it("should not throw", function (done) {
          mocha.run(function () {
            mocha.run(done);
          });
        });

        it("should call `Runner#runAsync` for each call", function (done) {
          mocha.run(function () {
            mocha.run(function () {
              expect(runner.runAsync, "was called twice");
              done();
            });
          });
        });

        it("should reset the root Suite between runs", function (done) {
          mocha.run(function () {
            mocha.run(function () {
              expect(suite.reset, "was called once");
              done();
            });
          });
        });

        it("should dispose the previous runner", function (done) {
          mocha.run(function () {
            mocha.run(function () {
              expect(runner.dispose, "was called once");
              done();
            });
          });
        });
      });

      describe("when global setup fixtures enabled", function () {
        beforeEach(function () {
          mocha.options.enableGlobalSetup = true;
        });
        describe("when global setup fixtures not present", function () {
          beforeEach(function () {
            sinon.stub(mocha, "hasGlobalSetupFixtures").returns(false);
          });

          it("should not run global setup fixtures", function (done) {
            mocha.run(() => {
              expect(mocha.runGlobalSetup, "was not called");
              done();
            });
          });
        });

        describe("when global setup fixtures are present", function () {
          beforeEach(function () {
            sinon.stub(mocha, "hasGlobalSetupFixtures").returns(true);
          });

          it("should run global setup fixtures", function (done) {
            mocha.run(() => {
              expect(mocha.runGlobalSetup, "to have a call satisfying", {
                args: [expect.it("to be", runner)],
              }).and("was called once");
              done();
            });
          });
        });
      });

      describe("when global setup fixtures disabled", function () {
        beforeEach(function () {
          mocha.options.enableGlobalSetup = false;
        });
        describe("when global setup fixtures not present", function () {
          beforeEach(function () {
            sinon.stub(mocha, "hasGlobalSetupFixtures").returns(false);
          });

          it("should not run global setup fixtures", function (done) {
            mocha.run(() => {
              expect(mocha.runGlobalSetup, "was not called");
              done();
            });
          });
        });

        describe("when global setup fixtures are present", function () {
          beforeEach(function () {
            sinon.stub(mocha, "hasGlobalSetupFixtures").returns(true);
          });

          it("should not run global setup fixtures", function (done) {
            mocha.run(() => {
              expect(mocha.runGlobalSetup, "was not called");
              done();
            });
          });
        });
      });

      describe("when global teardown fixtures enabled", function () {
        beforeEach(function () {
          mocha.options.enableGlobalTeardown = true;
        });
        describe("when global teardown fixtures not present", function () {
          beforeEach(function () {
            sinon.stub(mocha, "hasGlobalTeardownFixtures").returns(false);
          });

          it("should not run global teardown fixtures", function (done) {
            mocha.run(() => {
              expect(mocha.runGlobalTeardown, "was not called");
              done();
            });
          });
        });

        describe("when global teardown fixtures are present", function () {
          beforeEach(function () {
            sinon.stub(mocha, "hasGlobalTeardownFixtures").returns(true);
          });

          it("should run global teardown fixtures", function (done) {
            mocha.run(() => {
              expect(mocha.runGlobalTeardown, "to have a call satisfying", {
                args: [expect.it("to be", runner), { context: {} }],
              }).and("was called once");
              done();
            });
          });

          describe("when global setup fixtures are present and enabled", function () {
            beforeEach(function () {
              sinon.stub(mocha, "hasGlobalSetupFixtures").returns(true);
              mocha.options.enableGlobalSetup = true;
            });

            it("should use the same context as returned by `runGlobalSetup`", function (done) {
              mocha.run(() => {
                expect(mocha.runGlobalTeardown, "to have a call satisfying", {
                  args: [
                    expect.it("to be", runner),
                    { context: globalFixtureContext },
                  ],
                }).and("was called once");
                done();
              });
            });
          });
        });
      });

      describe("when global teardown fixtures disabled", function () {
        beforeEach(function () {
          mocha.options.enableGlobalTeardown = false;
        });
        describe("when global teardown fixtures not present", function () {
          beforeEach(function () {
            sinon.stub(mocha, "hasGlobalTeardownFixtures").returns(false);
          });

          it("should not run global teardown fixtures", function (done) {
            mocha.run(() => {
              expect(mocha.runGlobalTeardown, "was not called");
              done();
            });
          });
        });

        describe("when global teardown fixtures are present", function () {
          beforeEach(function () {
            sinon.stub(mocha, "hasGlobalTeardownFixtures").returns(true);
          });

          it("should not run global teardown fixtures", function (done) {
            mocha.run(() => {
              expect(mocha.runGlobalTeardown, "was not called");
              done();
            });
          });
        });
      });
    });

    describe("parallelMode()", function () {
      describe("when `Mocha` is running in a browser", function () {
        beforeEach(function () {
          sinon.stub(utils, "isBrowser").returns(true);
        });

        it("should throw", function () {
          expect(
            function () {
              mocha.parallelMode();
            },
            "to throw",
            { code: "ERR_MOCHA_UNSUPPORTED" },
          );
        });
      });
    });

    describe("unloadFile()", function () {
      describe("when run in a browser", function () {
        beforeEach(function () {
          sinon.stub(utils, "isBrowser").returns(true);
        });

        it("should throw", function () {
          expect(() => Mocha.unloadFile("guy-fieri.js"), "to throw", {
            code: "ERR_MOCHA_UNSUPPORTED",
          });
        });
      });
    });

    describe("_runGlobalFixtures()", function () {
      it("should execute multiple fixtures in order", async function () {
        const fixtures = [
          sinon.stub().resolves("foo"),
          sinon.stub().returns("bar"),
        ];
        const context = await mocha._runGlobalFixtures(fixtures);

        return expect(fixtures, "to satisfy", [
          expect.it("to have a call satisfying", {
            thisValue: context,
            returnValue: expect.it("to be fulfilled with", "foo"),
          }),
          expect.it("to have a call satisfying", {
            thisValue: context,
            returnValue: "bar",
          }),
        ]);
      });
    });

    describe("runGlobalSetup()", function () {
      let context;

      beforeEach(function () {
        sinon.stub(mocha, "_runGlobalFixtures").resolvesArg(1);
        context = {};
      });

      describe("when fixture(s) are present", function () {
        beforeEach(function () {
          mocha.options.globalSetup = [sinon.spy()];
        });

        it("should attempt run the fixtures", async function () {
          await mocha.runGlobalSetup(context);
          expect(mocha._runGlobalFixtures, "to have a call satisfying", [
            mocha.options.globalSetup,
            context,
          ]);
        });
      });

      describe("when a fixture is not present", function () {
        it("should not attempt to run fixtures", async function () {
          await mocha.runGlobalSetup();
          expect(mocha._runGlobalFixtures, "was not called");
        });
      });
    });

    describe("runGlobalTeardown()", function () {
      let context;

      beforeEach(function () {
        sinon.stub(mocha, "_runGlobalFixtures").resolvesArg(1);
        context = {};
      });

      describe("when fixture(s) are present", function () {
        beforeEach(function () {
          mocha.options.globalTeardown = [sinon.spy()];
        });

        it("should attempt to run the fixtures", async function () {
          await mocha.runGlobalTeardown();
          expect(mocha._runGlobalFixtures, "to have a call satisfying", [
            mocha.options.globalTeardown,
            context,
          ]);
        });
      });

      describe("when a fixture is not present", function () {
        it("not attempt to run the fixtures", async function () {
          await mocha.runGlobalTeardown();
          expect(mocha._runGlobalFixtures, "was not called");
        });
      });
    });

    describe("hasGlobalSetupFixtures()", function () {
      describe("when one or more global setup fixtures are present", function () {
        it("should return `true`", function () {
          mocha.options.globalSetup = [() => {}];
          expect(mocha.hasGlobalSetupFixtures(), "to be true");
        });
      });

      describe("when no global setup fixtures are present", function () {
        it("should return `false`", function () {
          mocha.options.globalSetup = [];
          expect(mocha.hasGlobalSetupFixtures(), "to be false");
        });
      });
    });

    describe("hasGlobalTeardownFixtures()", function () {
      describe("when one or more global teardown fixtures are present", function () {
        it("should return `true`", function () {
          mocha.options.globalTeardown = [() => {}];
          expect(mocha.hasGlobalTeardownFixtures(), "to be true");
        });
      });

      describe("when no global teardown fixtures are present", function () {
        it("should return `false`", function () {
          mocha.options.globalTeardown = [];
          expect(mocha.hasGlobalTeardownFixtures(), "to be false");
        });
      });
    });

    describe("rootHooks()", function () {
      it("should be chainable", function () {
        expect(mocha.rootHooks(), "to be", mocha);
      });

      describe('when provided a single "before all" hook', function () {
        it("should attach it to the root suite", function () {
          const beforeAll = () => {};
          mocha.rootHooks({ beforeAll });
          expect(mocha.suite.beforeAll, "to have a call satisfying", [
            beforeAll,
          ]).and("was called once");
        });
      });

      describe('when provided a single "before each" hook', function () {
        it("should attach it to the root suite", function () {
          const beforeEach = () => {};
          mocha.rootHooks({ beforeEach });
          expect(mocha.suite.beforeEach, "to have a call satisfying", [
            beforeEach,
          ]).and("was called once");
        });
      });

      describe('when provided a single "after all" hook', function () {
        it("should attach it to the root suite", function () {
          const afterAll = () => {};
          mocha.rootHooks({ afterAll });
          expect(mocha.suite.afterAll, "to have a call satisfying", [
            afterAll,
          ]).and("was called once");
        });
      });

      describe('when provided a single "after each" hook', function () {
        it("should attach it to the root suite", function () {
          const afterEach = () => {};
          mocha.rootHooks({ afterEach });
          expect(mocha.suite.afterEach, "to have a call satisfying", [
            afterEach,
          ]).and("was called once");
        });
      });

      describe('when provided multiple "before all" hooks', function () {
        it("should attach each to the root suite", function () {
          const beforeAll = [() => {}, () => {}];
          mocha.rootHooks({ beforeAll });
          expect(mocha.suite.beforeAll, "to have calls satisfying", [
            [beforeAll[0]],
            [beforeAll[1]],
          ]).and("was called twice");
        });
      });

      describe('when provided multiple "before each" hooks', function () {
        it("should attach each to the root suite", function () {
          const beforeEach = [() => {}, () => {}];
          mocha.rootHooks({ beforeEach });
          expect(mocha.suite.beforeEach, "to have calls satisfying", [
            [beforeEach[0]],
            [beforeEach[1]],
          ]).and("was called twice");
        });
      });

      describe('when provided multiple "after all" hooks', function () {
        it("should attach each to the root suite", function () {
          const afterAll = [() => {}, () => {}];
          mocha.rootHooks({ afterAll });
          expect(mocha.suite.afterAll, "to have calls satisfying", [
            [afterAll[0]],
            [afterAll[1]],
          ]).and("was called twice");
        });
      });

      describe('when provided multiple "after each" hooks', function () {
        it("should attach each to the root suite", function () {
          const afterEach = [() => {}, () => {}];
          mocha.rootHooks({ afterEach });
          expect(mocha.suite.afterEach, "to have calls satisfying", [
            [afterEach[0]],
            [afterEach[1]],
          ]).and("was called twice");
        });
      });
    });
  });
});
