How to use the chai.assert.isFalse function in chai

it("should detect param name format", () => {
    assert.isTrue(argumentsParser._hasCLAParamNameFormat("--run"));
    assert.isFalse(argumentsParser._hasCLAParamNameFormat("run"));
  });

it("第一个参数为null，返回false", function ()
            {
                assert.isFalse(TopJs.String.startsWith(null, ''));
            });
            it("第二个参数为null，返回false", function ()

}).finally(function () {
      console.log('finally ');
      assert.isFalse(failed);
      assert.isNull(err);
      done();
    });
  });

it('returns false if url does not have either of those two substrings', () => {
      const test = 'https://example.com/f00/bar';
      assert.isFalse(isGistURL(test));
    });
  });

it('shouldRun is false when the analysis_type is funnel', function () {
        assert.isFalse(ExplorerValidations.event_collection.shouldRun({ query: { analysis_type: 'funnel' } }));
      });
      it('shouldRun is true when the analysis_type is not', function () {

it("删除只有一个属性的对象", function ()
        {
            let obj = {
                prop1: "prop1"
            };
            TopJs.Object.clear(obj);
            assert.isFalse(obj.hasOwnProperty('prop1'));
        });
        it("同时删除多个属性", function ()

it('returns false if the query returns a list and the source returns an item', () => {
      const s = new SourceDefinition({
        id: 1,
        returns: User.item(),
        meta: {}
      });
      const q = new Query(
        User,
        ['id'],
        RETURNS_LIST
      );
      assert.isFalse(utils.doesSourceSatisfyQueryReturnType(s, q));
    });
  });

l.lock('resource1', 100, function (err, lock) {
      assert.isFalse(!!err)
      c++
      assert.equal(c, 3)
      lock.unlock()
      done()
    })
  })

defaultSamplingProbability: 1,
      perOperationStrategies: [
        {
          operation: 'op1',
          probabilisticSampling: { samplingRate: 0 },
        },
        {
          operation: 'op2',
          probabilisticSampling: { samplingRate: 1 },
        },
      ],
    };
    let sampler = new PerOperationSampler(strategies, 2);
    let tracer = new Tracer('test', new NoopReporter(), sampler);
    let span = tracer.startSpan('op1');
    assert.isFalse(span._spanContext.isSampled());
    assert.isFalse(span._spanContext.samplingFinalized);
    span.setOperationName('op2');
    assert.isTrue(span._spanContext.isSampled());
    assert.isTrue(span._spanContext.samplingFinalized);
  });

runInFrame(1, () => {
          assert.isFalse(reducer.called);
          done();
        });
      });