text: describe(`all "get" methods are non-mutating`, () => {
    before(() => {
      object.numberyStrings = ['-1', '0', '1'];
      object.NaNyStrings = ['h', 'i', '!'];
    });
  
    describe(`.allStrings()`, () => {
      before(() => { object.allStrings() });
      it('does not modify .numberyStrings', () => {
        assert.deepStrictEqual(object.numberyStrings, ['-1', '0', '1']);
      });
      it('does not modify .NaNyStrings', () => {
        assert.deepStrictEqual(object.NaNyStrings, ['h', 'i', '!']);
      });
    });
    describe(`.evenStrings()`, () => {
      before(() => { object.evenStrings() });
      it('does not modify .numberyStrings', () => {
        assert.deepStrictEqual(object.numberyStrings, ['-1', '0', '1']);
      });
      it('does not modify .NaNyStrings', () => {
        assert.deepStrictEqual(object.NaNyStrings, ['h', 'i', '!']);
      });
    });
    describe(`.oddStrings()`, () => {
      before(() => { object.oddStrings() });
      it('does not modify .numberyStrings', () => {
        assert.deepStrictEqual(object.numberyStrings, ['-1', '0', '1']);
      });
      it('does not modify .NaNyStrings', () => {
        assert.deepStrictEqual(object.NaNyStrings, ['h', 'i', '!']);
      });
    });
    describe(`.negativeStrings()`, () => {
      before(() => { object.negativeStrings() });
      it('does not modify .numberyStrings', () => {
        assert.deepStrictEqual(object.numberyStrings, ['-1', '0', '1']);
      });
      it('does not modify .NaNyStrings', () => {
        assert.deepStrictEqual(object.NaNyStrings, ['h', 'i', '!']);
      });
    });
    describe(`.positiveStrings()`, () => {
      before(() => { object.positiveStrings() });
      it('does not modify .numberyStrings', () => {
        assert.deepStrictEqual(object.numberyStrings, ['-1', '0', '1']);
      });
      it('does not modify .NaNyStrings', () => {
        assert.deepStrictEqual(object.NaNyStrings, ['h', 'i', '!']);
      });
    });
    describe(`.zeroStrings()`, () => {
      before(() => { object.zeroStrings() });
      it('does not modify .numberyStrings', () => {
        assert.deepStrictEqual(object.numberyStrings, ['-1', '0', '1']);
      });
      it('does not modify .NaNyStrings', () => {
        assert.deepStrictEqual(object.NaNyStrings, ['h', 'i', '!']);
      });
    });
    describe(`.numberyAsNumbers`, () => {
      before(() => { object.numberyAsNumbers() });
      it('does not modify .numberyStrings', () => {
        assert.deepStrictEqual(object.numberyStrings, ['-1', '0', '1']);
      });
      it('does not modify .NaNyStrings', () => {
        assert.deepStrictEqual(object.NaNyStrings, ['h', 'i', '!']);
      });
    });
    describe(`.sumOfNumbery`, () => {
      before(() => { object.sumOfNumbery() });
      it('does not modify .numberyStrings', () => {
        assert.deepStrictEqual(object.numberyStrings, ['-1', '0', '1']);
      });
      it('does not modify .NaNyStrings', () => {
        assert.deepStrictEqual(object.NaNyStrings, ['h', 'i', '!']);
      });
    });
  });
  