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How to use getChars method in storybook-root

Best JavaScript code snippet using storybook-root

Terminal.test.ts

Source:Terminal.test.ts

...516          term.buffer.lines.get(INIT_ROWS - 1).setCell(0, CellData.fromCharData([0, 'b', 0, 'b'.charCodeAt(0)]));517          term.buffer.y = INIT_ROWS - 1; // Move cursor to last line518          term.scroll();519          assert.equal(term.buffer.lines.length, INIT_ROWS + 1);520          assert.equal(term.buffer.lines.get(0).loadCell(0, new CellData()).getChars(), 'a');521          assert.equal(term.buffer.lines.get(INIT_ROWS - 1).loadCell(0, new CellData()).getChars(), 'b');522          assert.equal(term.buffer.lines.get(INIT_ROWS).loadCell(0, new CellData()).getChars(), '');523        });524        it('should properly scroll inside a scroll region (scrollTop set)', () => {525          term.buffer.lines.get(0).setCell(0, CellData.fromCharData([0, 'a', 0, 'a'.charCodeAt(0)]));526          term.buffer.lines.get(1).setCell(0, CellData.fromCharData([0, 'b', 0, 'b'.charCodeAt(0)]));527          term.buffer.lines.get(2).setCell(0, CellData.fromCharData([0, 'c', 0, 'c'.charCodeAt(0)]));528          term.buffer.y = INIT_ROWS - 1; // Move cursor to last line529          term.buffer.scrollTop = 1;530          term.scroll();531          assert.equal(term.buffer.lines.length, INIT_ROWS);532          assert.equal(term.buffer.lines.get(0).loadCell(0, new CellData()).getChars(), 'a');533          assert.equal(term.buffer.lines.get(1).loadCell(0, new CellData()).getChars(), 'c');534        });535        it('should properly scroll inside a scroll region (scrollBottom set)', () => {536          term.buffer.lines.get(0).setCell(0, CellData.fromCharData([0, 'a', 0, 'a'.charCodeAt(0)]));537          term.buffer.lines.get(1).setCell(0, CellData.fromCharData([0, 'b', 0, 'b'.charCodeAt(0)]));538          term.buffer.lines.get(2).setCell(0, CellData.fromCharData([0, 'c', 0, 'c'.charCodeAt(0)]));539          term.buffer.lines.get(3).setCell(0, CellData.fromCharData([0, 'd', 0, 'd'.charCodeAt(0)]));540          term.buffer.lines.get(4).setCell(0, CellData.fromCharData([0, 'e', 0, 'e'.charCodeAt(0)]));541          term.buffer.y = 3;542          term.buffer.scrollBottom = 3;543          term.scroll();544          assert.equal(term.buffer.lines.length, INIT_ROWS + 1);545          assert.equal(term.buffer.lines.get(0).loadCell(0, new CellData()).getChars(), 'a', '\'a\' should be pushed to the scrollback');546          assert.equal(term.buffer.lines.get(1).loadCell(0, new CellData()).getChars(), 'b');547          assert.equal(term.buffer.lines.get(2).loadCell(0, new CellData()).getChars(), 'c');548          assert.equal(term.buffer.lines.get(3).loadCell(0, new CellData()).getChars(), 'd');549          assert.equal(term.buffer.lines.get(4).loadCell(0, new CellData()).getChars(), '', 'a blank line should be added at scrollBottom\'s index');550          assert.equal(term.buffer.lines.get(5).loadCell(0, new CellData()).getChars(), 'e');551        });552        it('should properly scroll inside a scroll region (scrollTop and scrollBottom set)', () => {553          term.buffer.lines.get(0).setCell(0, CellData.fromCharData([0, 'a', 0, 'a'.charCodeAt(0)]));554          term.buffer.lines.get(1).setCell(0, CellData.fromCharData([0, 'b', 0, 'b'.charCodeAt(0)]));555          term.buffer.lines.get(2).setCell(0, CellData.fromCharData([0, 'c', 0, 'c'.charCodeAt(0)]));556          term.buffer.lines.get(3).setCell(0, CellData.fromCharData([0, 'd', 0, 'd'.charCodeAt(0)]));557          term.buffer.lines.get(4).setCell(0, CellData.fromCharData([0, 'e', 0, 'e'.charCodeAt(0)]));558          term.buffer.y = INIT_ROWS - 1; // Move cursor to last line559          term.buffer.scrollTop = 1;560          term.buffer.scrollBottom = 3;561          term.scroll();562          assert.equal(term.buffer.lines.length, INIT_ROWS);563          assert.equal(term.buffer.lines.get(0).loadCell(0, new CellData()).getChars(), 'a');564          assert.equal(term.buffer.lines.get(1).loadCell(0, new CellData()).getChars(), 'c', '\'b\' should be removed from the buffer');565          assert.equal(term.buffer.lines.get(2).loadCell(0, new CellData()).getChars(), 'd');566          assert.equal(term.buffer.lines.get(3).loadCell(0, new CellData()).getChars(), '', 'a blank line should be added at scrollBottom\'s index');567          assert.equal(term.buffer.lines.get(4).loadCell(0, new CellData()).getChars(), 'e');568        });569      });570      describe('when scrollback === 0', () => {571        beforeEach(() => {572          term.setOption('scrollback', 0);573          assert.equal(term.buffer.lines.maxLength, INIT_ROWS);574        });575        it('should create a new line and shift everything up', () => {576          term.buffer.lines.get(0).setCell(0, CellData.fromCharData([0, 'a', 0, 'a'.charCodeAt(0)]));577          term.buffer.lines.get(1).setCell(0, CellData.fromCharData([0, 'b', 0, 'b'.charCodeAt(0)]));578          term.buffer.lines.get(INIT_ROWS - 1).setCell(0, CellData.fromCharData([0, 'c', 0, 'c'.charCodeAt(0)]));579          term.buffer.y = INIT_ROWS - 1; // Move cursor to last line580          assert.equal(term.buffer.lines.length, INIT_ROWS);581          term.scroll();582          assert.equal(term.buffer.lines.length, INIT_ROWS);583          // 'a' gets pushed out of buffer584          assert.equal(term.buffer.lines.get(0).loadCell(0, new CellData()).getChars(), 'b');585          assert.equal(term.buffer.lines.get(1).loadCell(0, new CellData()).getChars(), '');586          assert.equal(term.buffer.lines.get(INIT_ROWS - 2).loadCell(0, new CellData()).getChars(), 'c');587          assert.equal(term.buffer.lines.get(INIT_ROWS - 1).loadCell(0, new CellData()).getChars(), '');588        });589        it('should properly scroll inside a scroll region (scrollTop set)', () => {590          term.buffer.lines.get(0).setCell(0, CellData.fromCharData([0, 'a', 0, 'a'.charCodeAt(0)]));591          term.buffer.lines.get(1).setCell(0, CellData.fromCharData([0, 'b', 0, 'b'.charCodeAt(0)]));592          term.buffer.lines.get(2).setCell(0, CellData.fromCharData([0, 'c', 0, 'c'.charCodeAt(0)]));593          term.buffer.y = INIT_ROWS - 1; // Move cursor to last line594          term.buffer.scrollTop = 1;595          term.scroll();596          assert.equal(term.buffer.lines.length, INIT_ROWS);597          assert.equal(term.buffer.lines.get(0).loadCell(0, new CellData()).getChars(), 'a');598          assert.equal(term.buffer.lines.get(1).loadCell(0, new CellData()).getChars(), 'c');599        });600        it('should properly scroll inside a scroll region (scrollBottom set)', () => {601          term.buffer.lines.get(0).setCell(0, CellData.fromCharData([0, 'a', 0, 'a'.charCodeAt(0)]));602          term.buffer.lines.get(1).setCell(0, CellData.fromCharData([0, 'b', 0, 'b'.charCodeAt(0)]));603          term.buffer.lines.get(2).setCell(0, CellData.fromCharData([0, 'c', 0, 'c'.charCodeAt(0)]));604          term.buffer.lines.get(3).setCell(0, CellData.fromCharData([0, 'd', 0, 'd'.charCodeAt(0)]));605          term.buffer.lines.get(4).setCell(0, CellData.fromCharData([0, 'e', 0, 'e'.charCodeAt(0)]));606          term.buffer.y = 3;607          term.buffer.scrollBottom = 3;608          term.scroll();609          assert.equal(term.buffer.lines.length, INIT_ROWS);610          assert.equal(term.buffer.lines.get(0).loadCell(0, new CellData()).getChars(), 'b');611          assert.equal(term.buffer.lines.get(1).loadCell(0, new CellData()).getChars(), 'c');612          assert.equal(term.buffer.lines.get(2).loadCell(0, new CellData()).getChars(), 'd');613          assert.equal(term.buffer.lines.get(3).loadCell(0, new CellData()).getChars(), '', 'a blank line should be added at scrollBottom\'s index');614          assert.equal(term.buffer.lines.get(4).loadCell(0, new CellData()).getChars(), 'e');615        });616        it('should properly scroll inside a scroll region (scrollTop and scrollBottom set)', () => {617          term.buffer.lines.get(0).setCell(0, CellData.fromCharData([0, 'a', 0, 'a'.charCodeAt(0)]));618          term.buffer.lines.get(1).setCell(0, CellData.fromCharData([0, 'b', 0, 'b'.charCodeAt(0)]));619          term.buffer.lines.get(2).setCell(0, CellData.fromCharData([0, 'c', 0, 'c'.charCodeAt(0)]));620          term.buffer.lines.get(3).setCell(0, CellData.fromCharData([0, 'd', 0, 'd'.charCodeAt(0)]));621          term.buffer.lines.get(4).setCell(0, CellData.fromCharData([0, 'e', 0, 'e'.charCodeAt(0)]));622          term.buffer.y = INIT_ROWS - 1; // Move cursor to last line623          term.buffer.scrollTop = 1;624          term.buffer.scrollBottom = 3;625          term.scroll();626          assert.equal(term.buffer.lines.length, INIT_ROWS);627          assert.equal(term.buffer.lines.get(0).loadCell(0, new CellData()).getChars(), 'a');628          assert.equal(term.buffer.lines.get(1).loadCell(0, new CellData()).getChars(), 'c', '\'b\' should be removed from the buffer');629          assert.equal(term.buffer.lines.get(2).loadCell(0, new CellData()).getChars(), 'd');630          assert.equal(term.buffer.lines.get(3).loadCell(0, new CellData()).getChars(), '', 'a blank line should be added at scrollBottom\'s index');631          assert.equal(term.buffer.lines.get(4).loadCell(0, new CellData()).getChars(), 'e');632        });633      });634    });635  });636  describe('Third level shift', () => {637    let evKeyDown: any;638    let evKeyPress: any;639    beforeEach(() => {640      term.handler = () => { };641      term.showCursor = () => { };642      term.clearSelection = () => { };643      // term.compositionHelper = {644      //   isComposing: false,645      //   keydown: {646      //     bind: () => {647      //       return () => { return true; };648      //     }649      //   }650      // };651      evKeyDown = {652        preventDefault: () => { },653        stopPropagation: () => { },654        type: 'keydown',655        altKey: null,656        keyCode: null657      };658      evKeyPress = {659        preventDefault: () => { },660        stopPropagation: () => { },661        type: 'keypress',662        altKey: null,663        charCode: null,664        keyCode: null665      };666    });667    describe('with macOptionIsMeta', () => {668      beforeEach(() => {669        term.browser.isMac = true;670        term.setOption('macOptionIsMeta', true);671      });672      it('should interfere with the alt key on keyDown', () => {673        evKeyDown.altKey = true;674        evKeyDown.keyCode = 81;675        assert.equal(term.keyDown(evKeyDown), false);676        evKeyDown.altKey = true;677        evKeyDown.keyCode = 192;678        assert.equal(term.keyDown(evKeyDown), false);679      });680    });681    describe('On Mac OS', () => {682      beforeEach(() => {683        term.browser.isMac = true;684      });685      it('should not interfere with the alt key on keyDown', () => {686        evKeyDown.altKey = true;687        evKeyDown.keyCode = 81;688        assert.equal(term.keyDown(evKeyDown), true);689        evKeyDown.altKey = true;690        evKeyDown.keyCode = 192;691        assert.equal(term.keyDown(evKeyDown), true);692      });693      it('should interefere with the alt + arrow keys', () => {694        evKeyDown.altKey = true;695        evKeyDown.keyCode = 37;696        assert.equal(term.keyDown(evKeyDown), false);697        evKeyDown.altKey = true;698        evKeyDown.keyCode = 39;699        assert.equal(term.keyDown(evKeyDown), false);700      });701      it('should emit key with alt + key on keyPress', (done) => {702        const keys = ['@', '@', '\\', '\\', '|', '|'];703        term.on('keypress', (key) => {704          if (key) {705            const index = keys.indexOf(key);706            assert(index !== -1, 'Emitted wrong key: ' + key);707            keys.splice(index, 1);708          }709          if (keys.length === 0) done();710        });711        evKeyPress.altKey = true;712        // @713        evKeyPress.charCode = null;714        evKeyPress.keyCode = 64;715        term.keyPress(evKeyPress);716        // Firefox @717        evKeyPress.charCode = 64;718        evKeyPress.keyCode = 0;719        term.keyPress(evKeyPress);720        // \721        evKeyPress.charCode = null;722        evKeyPress.keyCode = 92;723        term.keyPress(evKeyPress);724        // Firefox \725        evKeyPress.charCode = 92;726        evKeyPress.keyCode = 0;727        term.keyPress(evKeyPress);728        // |729        evKeyPress.charCode = null;730        evKeyPress.keyCode = 124;731        term.keyPress(evKeyPress);732        // Firefox |733        evKeyPress.charCode = 124;734        evKeyPress.keyCode = 0;735        term.keyPress(evKeyPress);736      });737    });738    describe('On MS Windows', () => {739      beforeEach(() => {740        term.browser.isMSWindows = true;741      });742      it('should not interfere with the alt + ctrl key on keyDown', () => {743        evKeyPress.altKey = true;744        evKeyPress.ctrlKey = true;745        evKeyPress.keyCode = 81;746        assert.equal(term.keyDown(evKeyPress), true);747        evKeyDown.altKey = true;748        evKeyDown.ctrlKey = true;749        evKeyDown.keyCode = 81;750        assert.equal(term.keyDown(evKeyDown), true);751      });752      it('should interefere with the alt + ctrl + arrow keys', () => {753        evKeyDown.altKey = true;754        evKeyDown.ctrlKey = true;755        evKeyDown.keyCode = 37;756        assert.equal(term.keyDown(evKeyDown), false);757        evKeyDown.keyCode = 39;758        assert.equal(term.keyDown(evKeyDown), false);759      });760      it('should emit key with alt + ctrl + key on keyPress', (done) => {761        const keys = ['@', '@', '\\', '\\', '|', '|'];762        term.on('keypress', (key) => {763          if (key) {764            const index = keys.indexOf(key);765            assert(index !== -1, 'Emitted wrong key: ' + key);766            keys.splice(index, 1);767          }768          if (keys.length === 0) done();769        });770        evKeyPress.altKey = true;771        evKeyPress.ctrlKey = true;772        // @773        evKeyPress.charCode = null;774        evKeyPress.keyCode = 64;775        term.keyPress(evKeyPress);776        // Firefox @777        evKeyPress.charCode = 64;778        evKeyPress.keyCode = 0;779        term.keyPress(evKeyPress);780        // \781        evKeyPress.charCode = null;782        evKeyPress.keyCode = 92;783        term.keyPress(evKeyPress);784        // Firefox \785        evKeyPress.charCode = 92;786        evKeyPress.keyCode = 0;787        term.keyPress(evKeyPress);788        // |789        evKeyPress.charCode = null;790        evKeyPress.keyCode = 124;791        term.keyPress(evKeyPress);792        // Firefox |793        evKeyPress.charCode = 124;794        evKeyPress.keyCode = 0;795        term.keyPress(evKeyPress);796      });797    });798  });799  describe('unicode - surrogates', () => {800    it('2 characters per cell', function (): void {801      this.timeout(10000);  // This is needed because istanbul patches code and slows it down802      const high = String.fromCharCode(0xD800);803      const cell = new CellData();804      for (let i = 0xDC00; i <= 0xDCFF; ++i) {805        term.write(high + String.fromCharCode(i));806        const tchar = term.buffer.lines.get(0).loadCell(0, cell);807        expect(tchar.getChars()).eql(high + String.fromCharCode(i));808        expect(tchar.getChars().length).eql(2);809        expect(tchar.getWidth()).eql(1);810        expect(term.buffer.lines.get(0).loadCell(1, cell).getChars()).eql('');811        term.reset();812      }813    });814    it('2 characters at last cell', () => {815      const high = String.fromCharCode(0xD800);816      const cell = new CellData();817      for (let i = 0xDC00; i <= 0xDCFF; ++i) {818        term.buffer.x = term.cols - 1;819        term.write(high + String.fromCharCode(i));820        expect(term.buffer.lines.get(0).loadCell(term.buffer.x - 1, cell).getChars()).eql(high + String.fromCharCode(i));821        expect(term.buffer.lines.get(0).loadCell(term.buffer.x - 1, cell).getChars().length).eql(2);822        expect(term.buffer.lines.get(1).loadCell(0, cell).getChars()).eql('');823        term.reset();824      }825    });826    it('2 characters per cell over line end with autowrap', () => {827      const high = String.fromCharCode(0xD800);828      const cell = new CellData();829      for (let i = 0xDC00; i <= 0xDCFF; ++i) {830        term.buffer.x = term.cols - 1;831        term.wraparoundMode = true;832        term.write('a' + high + String.fromCharCode(i));833        expect(term.buffer.lines.get(0).loadCell(term.cols - 1, cell).getChars()).eql('a');834        expect(term.buffer.lines.get(1).loadCell(0, cell).getChars()).eql(high + String.fromCharCode(i));835        expect(term.buffer.lines.get(1).loadCell(0, cell).getChars().length).eql(2);836        expect(term.buffer.lines.get(1).loadCell(1, cell).getChars()).eql('');837        term.reset();838      }839    });840    it('2 characters per cell over line end without autowrap', () => {841      const high = String.fromCharCode(0xD800);842      const cell = new CellData();843      for (let i = 0xDC00; i <= 0xDCFF; ++i) {844        term.buffer.x = term.cols - 1;845        term.wraparoundMode = false;846        term.write('a' + high + String.fromCharCode(i));847        // auto wraparound mode should cut off the rest of the line848        expect(term.buffer.lines.get(0).loadCell(term.cols - 1, cell).getChars()).eql('a');849        expect(term.buffer.lines.get(0).loadCell(term.cols - 1, cell).getChars().length).eql(1);850        expect(term.buffer.lines.get(1).loadCell(1, cell).getChars()).eql('');851        term.reset();852      }853    });854    it('splitted surrogates', () => {855      const high = String.fromCharCode(0xD800);856      const cell = new CellData();857      for (let i = 0xDC00; i <= 0xDCFF; ++i) {858        term.write(high);859        term.write(String.fromCharCode(i));860        const tchar = term.buffer.lines.get(0).loadCell(0, cell);861        expect(tchar.getChars()).eql(high + String.fromCharCode(i));862        expect(tchar.getChars().length).eql(2);863        expect(tchar.getWidth()).eql(1);864        expect(term.buffer.lines.get(0).loadCell(1, cell).getChars()).eql('');865        term.reset();866      }867    });868  });869  describe('unicode - combining characters', () => {870    const cell = new CellData();871    it('cafÃ©', () => {872      term.write('cafe\u0301');873      term.buffer.lines.get(0).loadCell(3, cell);874      expect(cell.getChars()).eql('e\u0301');875      expect(cell.getChars().length).eql(2);876      expect(cell.getWidth()).eql(1);877    });878    it('cafÃ© - end of line', () => {879      term.buffer.x = term.cols - 1 - 3;880      term.write('cafe\u0301');881      term.buffer.lines.get(0).loadCell(term.cols - 1, cell);882      expect(cell.getChars()).eql('e\u0301');883      expect(cell.getChars().length).eql(2);884      expect(cell.getWidth()).eql(1);885      term.buffer.lines.get(0).loadCell(1, cell);886      expect(cell.getChars()).eql('');887      expect(cell.getChars().length).eql(0);888      expect(cell.getWidth()).eql(1);889    });890    it('multiple combined Ã©', () => {891      term.wraparoundMode = true;892      term.write(Array(100).join('e\u0301'));893      for (let i = 0; i < term.cols; ++i) {894        term.buffer.lines.get(0).loadCell(i, cell);895        expect(cell.getChars()).eql('e\u0301');896        expect(cell.getChars().length).eql(2);897        expect(cell.getWidth()).eql(1);898      }899      term.buffer.lines.get(1).loadCell(0, cell);900      expect(cell.getChars()).eql('e\u0301');901      expect(cell.getChars().length).eql(2);902      expect(cell.getWidth()).eql(1);903    });904    it('multiple surrogate with combined', () => {905      term.wraparoundMode = true;906      term.write(Array(100).join('\uD800\uDC00\u0301'));907      for (let i = 0; i < term.cols; ++i) {908        term.buffer.lines.get(0).loadCell(i, cell);909        expect(cell.getChars()).eql('\uD800\uDC00\u0301');910        expect(cell.getChars().length).eql(3);911        expect(cell.getWidth()).eql(1);912      }913      term.buffer.lines.get(1).loadCell(0, cell);914      expect(cell.getChars()).eql('\uD800\uDC00\u0301');915      expect(cell.getChars().length).eql(3);916      expect(cell.getWidth()).eql(1);917    });918  });919  describe('unicode - fullwidth characters', () => {920    const cell = new CellData();921    it('cursor movement even', () => {922      expect(term.buffer.x).eql(0);923      term.write('ï¿¥');924      expect(term.buffer.x).eql(2);925    });926    it('cursor movement odd', () => {927      term.buffer.x = 1;928      expect(term.buffer.x).eql(1);929      term.write('ï¿¥');930      expect(term.buffer.x).eql(3);931    });932    it('line of ï¿¥ even', () => {933      term.wraparoundMode = true;934      term.write(Array(50).join('ï¿¥'));935      for (let i = 0; i < term.cols; ++i) {936        term.buffer.lines.get(0).loadCell(i, cell);937        if (i % 2) {938          expect(cell.getChars()).eql('');939          expect(cell.getChars().length).eql(0);940          expect(cell.getWidth()).eql(0);941        } else {942          expect(cell.getChars()).eql('ï¿¥');943          expect(cell.getChars().length).eql(1);944          expect(cell.getWidth()).eql(2);945        }946      }947      term.buffer.lines.get(1).loadCell(0, cell);948      expect(cell.getChars()).eql('ï¿¥');949      expect(cell.getChars().length).eql(1);950      expect(cell.getWidth()).eql(2);951    });952    it('line of ï¿¥ odd', () => {953      term.wraparoundMode = true;954      term.buffer.x = 1;955      term.write(Array(50).join('ï¿¥'));956      for (let i = 1; i < term.cols - 1; ++i) {957        term.buffer.lines.get(0).loadCell(i, cell);958        if (!(i % 2)) {959          expect(cell.getChars()).eql('');960          expect(cell.getChars().length).eql(0);961          expect(cell.getWidth()).eql(0);962        } else {963          expect(cell.getChars()).eql('ï¿¥');964          expect(cell.getChars().length).eql(1);965          expect(cell.getWidth()).eql(2);966        }967      }968      term.buffer.lines.get(0).loadCell(term.cols - 1, cell);969      expect(cell.getChars()).eql('');970      expect(cell.getChars().length).eql(0);971      expect(cell.getWidth()).eql(1);972      term.buffer.lines.get(1).loadCell(0, cell);973      expect(cell.getChars()).eql('ï¿¥');974      expect(cell.getChars().length).eql(1);975      expect(cell.getWidth()).eql(2);976    });977    it('line of ï¿¥ with combining odd', () => {978      term.wraparoundMode = true;979      term.buffer.x = 1;980      term.write(Array(50).join('ï¿¥\u0301'));981      for (let i = 1; i < term.cols - 1; ++i) {982        term.buffer.lines.get(0).loadCell(i, cell);983        if (!(i % 2)) {984          expect(cell.getChars()).eql('');985          expect(cell.getChars().length).eql(0);986          expect(cell.getWidth()).eql(0);987        } else {988          expect(cell.getChars()).eql('ï¿¥\u0301');989          expect(cell.getChars().length).eql(2);990          expect(cell.getWidth()).eql(2);991        }992      }993      term.buffer.lines.get(0).loadCell(term.cols - 1, cell);994      expect(cell.getChars()).eql('');995      expect(cell.getChars().length).eql(0);996      expect(cell.getWidth()).eql(1);997      term.buffer.lines.get(1).loadCell(0, cell);998      expect(cell.getChars()).eql('ï¿¥\u0301');999      expect(cell.getChars().length).eql(2);1000      expect(cell.getWidth()).eql(2);1001    });1002    it('line of ï¿¥ with combining even', () => {1003      term.wraparoundMode = true;1004      term.write(Array(50).join('ï¿¥\u0301'));1005      for (let i = 0; i < term.cols; ++i) {1006        term.buffer.lines.get(0).loadCell(i, cell);1007        if (i % 2) {1008          expect(cell.getChars()).eql('');1009          expect(cell.getChars().length).eql(0);1010          expect(cell.getWidth()).eql(0);1011        } else {1012          expect(cell.getChars()).eql('ï¿¥\u0301');1013          expect(cell.getChars().length).eql(2);1014          expect(cell.getWidth()).eql(2);1015        }1016      }1017      term.buffer.lines.get(1).loadCell(0, cell);1018      expect(cell.getChars()).eql('ï¿¥\u0301');1019      expect(cell.getChars().length).eql(2);1020      expect(cell.getWidth()).eql(2);1021    });1022    it('line of surrogate fullwidth with combining odd', () => {1023      term.wraparoundMode = true;1024      term.buffer.x = 1;1025      term.write(Array(50).join('\ud843\ude6d\u0301'));1026      for (let i = 1; i < term.cols - 1; ++i) {1027        term.buffer.lines.get(0).loadCell(i, cell);1028        if (!(i % 2)) {1029          expect(cell.getChars()).eql('');1030          expect(cell.getChars().length).eql(0);1031          expect(cell.getWidth()).eql(0);1032        } else {1033          expect(cell.getChars()).eql('\ud843\ude6d\u0301');1034          expect(cell.getChars().length).eql(3);1035          expect(cell.getWidth()).eql(2);1036        }1037      }1038      term.buffer.lines.get(0).loadCell(term.cols - 1, cell);1039      expect(cell.getChars()).eql('');1040      expect(cell.getChars().length).eql(0);1041      expect(cell.getWidth()).eql(1);1042      term.buffer.lines.get(1).loadCell(0, cell);1043      expect(cell.getChars()).eql('\ud843\ude6d\u0301');1044      expect(cell.getChars().length).eql(3);1045      expect(cell.getWidth()).eql(2);1046    });1047    it('line of surrogate fullwidth with combining even', () => {1048      term.wraparoundMode = true;1049      term.write(Array(50).join('\ud843\ude6d\u0301'));1050      for (let i = 0; i < term.cols; ++i) {1051        term.buffer.lines.get(0).loadCell(i, cell);1052        if (i % 2) {1053          expect(cell.getChars()).eql('');1054          expect(cell.getChars().length).eql(0);1055          expect(cell.getWidth()).eql(0);1056        } else {1057          expect(cell.getChars()).eql('\ud843\ude6d\u0301');1058          expect(cell.getChars().length).eql(3);1059          expect(cell.getWidth()).eql(2);1060        }1061      }1062      term.buffer.lines.get(1).loadCell(0, cell);1063      expect(cell.getChars()).eql('\ud843\ude6d\u0301');1064      expect(cell.getChars().length).eql(3);1065      expect(cell.getWidth()).eql(2);1066    });1067  });1068  describe('insert mode', () => {1069    const cell = new CellData();1070    it('halfwidth - all', () => {1071      term.write(Array(9).join('0123456789').slice(-80));1072      term.buffer.x = 10;1073      term.buffer.y = 0;1074      term.insertMode = true;1075      term.write('abcde');1076      expect(term.buffer.lines.get(0).length).eql(term.cols);1077      expect(term.buffer.lines.get(0).loadCell(10, cell).getChars()).eql('a');1078      expect(term.buffer.lines.get(0).loadCell(14, cell).getChars()).eql('e');1079      expect(term.buffer.lines.get(0).loadCell(15, cell).getChars()).eql('0');1080      expect(term.buffer.lines.get(0).loadCell(79, cell).getChars()).eql('4');1081    });1082    it('fullwidth - insert', () => {1083      term.write(Array(9).join('0123456789').slice(-80));1084      term.buffer.x = 10;1085      term.buffer.y = 0;1086      term.insertMode = true;1087      term.write('ï¿¥ï¿¥ï¿¥');1088      expect(term.buffer.lines.get(0).length).eql(term.cols);1089      expect(term.buffer.lines.get(0).loadCell(10, cell).getChars()).eql('ï¿¥');1090      expect(term.buffer.lines.get(0).loadCell(11, cell).getChars()).eql('');1091      expect(term.buffer.lines.get(0).loadCell(14, cell).getChars()).eql('ï¿¥');1092      expect(term.buffer.lines.get(0).loadCell(15, cell).getChars()).eql('');1093      expect(term.buffer.lines.get(0).loadCell(79, cell).getChars()).eql('3');1094    });1095    it('fullwidth - right border', () => {1096      term.write(Array(41).join('ï¿¥'));1097      term.buffer.x = 10;1098      term.buffer.y = 0;1099      term.insertMode = true;1100      term.write('a');1101      expect(term.buffer.lines.get(0).length).eql(term.cols);1102      expect(term.buffer.lines.get(0).loadCell(10, cell).getChars()).eql('a');1103      expect(term.buffer.lines.get(0).loadCell(11, cell).getChars()).eql('ï¿¥');1104      expect(term.buffer.lines.get(0).loadCell(79, cell).getChars()).eql('');  // fullwidth char got replaced1105      term.write('b');1106      expect(term.buffer.lines.get(0).length).eql(term.cols);1107      expect(term.buffer.lines.get(0).loadCell(11, cell).getChars()).eql('b');1108      expect(term.buffer.lines.get(0).loadCell(12, cell).getChars()).eql('ï¿¥');1109      expect(term.buffer.lines.get(0).loadCell(79, cell).getChars()).eql('');  // empty cell after fullwidth1110    });1111  });...

4.5 清除可选类型的尾类型递归.ts

Source:4.5 清除可选类型的尾类型递归.ts

1/**2 * å½å¯éç±»åä¸åºç°éå½æ¶, ts ä¼å¤ææ¯ä¸æ¯ æ ééå½ ,èæ¥é3 * */4{5  type InfiniteBox<T> = { item: InfiniteBox<T> };6  type Unpack<T> = T extends { item: infer U } ? Unpack<U> : T;7  // error: Type instantiation is excessively deep and possibly infinite.8  // type Test = Unpack<InfiniteBox<number>>9  type Test2 = Unpack<{ item: { item: { item: { item: number } } } }>; // æéçéå½ ok10}11{12  type TrimLeft<T extends string> = T extends ` ${infer Rest}`13    ? TrimLeft<Rest>14    : T;15  // Test = "hello" | "world"16  type Test1 = TrimLeft<"   hello" | " world">;17  // æ¥é éå½è¶è¿50æ¬¡18  // error: Type instantiation is excessively deep and possibly infinite.19  // type Test = TrimLeft<"20}21{22  // è¿ä¸ªç±»åä¸è½è¢« å°¾ç±»åéå½ ä¼å23  // å ä¸º æåæ¯ä¸ä¸ªç±»å24  type GetChars<S> = S extends `${infer Char}${infer Rest}`25    ? Char | GetChars<Rest>26    : never;27  type Test1 = GetChars<"1234567890">;28  // error è¶è¿50ä¸ª29  // type Test2 = GetChars<"123456789012345678901234567890123456789012345678901234567890">;30}31{32  // ä¸ºäºè¢« å°¾éå½ä¼å, å°±éè¦åä¸ä¸ªå¸®å©å½æ°33  // éå½æ¶æ²¡æå¶ä»é¢å¤çåå®¹`34  type GetChars<S> = GetCharsHelper<S, never>;35  type GetCharsHelper<S, Acc> = S extends `${infer Char}${infer Rest}`36    ? GetCharsHelper<Rest, Char | Acc>37    : Acc;38  type Test1 = GetChars<"01234657890">;39  // ä¾ç¶ok40  type Test2 =41    GetChars<"1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890">;42  // ä¹æ¯ok43  type Test3 =44    GetChars<"å½ TypeScript æ£æµå°å¯è½çæ ééå½æä»»ä½å¯è½éè¦å¾é¿æ¶é´å¹¶å½±åæ¨çç¼è¾å¨ä½éªçç±»åæ©å±æ¶ï¼å®éå¸¸éè¦ä¼éå°å¤±è´¥ãå æ¤ï¼TypeScript å·æå¯åå¼æ¹æ³ï¼å¯ç¡®ä¿å¨å°è¯åç¦»æ éæ·±çç±»åæå¤çä¼çæå¤§éä¸é´ç»æçç±»åæ¶ä¸ä¼è±è½¨ãè¿å°±æ¯ TypeScript 4.5 å¯¹æ¡ä»¶ç±»åæ§è¡ä¸äºå°¾éå½æ¶é¤çåå ãåªè¦æ¡ä»¶ç±»åçä¸ä¸ªåæ¯åªæ¯å¦ä¸ç§æ¡ä»¶ç±»åï¼TypeScript å°±å¯ä»¥é¿åä¸é´å®ä¾åãä»ç¶æä¸äºå¯åå¼æ¹æ³å¯ä»¥ç¡®ä¿è¿äºç±»åä¸ä¼åç¦»è½¨éï¼ä½å®ä»¬è¦å¤§å¾å¤ã">;45}...

pretty-env.ts

Source:pretty-env.ts

...51  // so I will list each newline.52  const envList: EnvList = stdout.toString().trim().split("\n");53  const { nameMaxSize, valueMaxSize } = getMaxSize(envList);54  let tableLength = Math.trunc(nameMaxSize + valueMaxSize + MARGIN);55  let displayText = getChars(tableLength, "-");56  for (const env of envList) {57    let nameSpaceLength = 0;58    let valueSpaceLength = 0;59    const name = env.split("=")[0];60    const value = env.split("=")[1];61    if (nameMaxSize > name.length) {62      nameSpaceLength = Math.trunc(nameMaxSize - name.length);63    }64    if (valueMaxSize > value.length) {65      valueSpaceLength = Math.trunc(valueMaxSize - value.length);66    }67    displayText += "\n";68    displayText += getChars(1, "|");69    displayText += getChars(LEFT_MARGIN, " ");70    if (name.length > (nameMaxSize - ELLIPSES_TEXT.length)) {71      displayText += name.substring(72        0,73        nameMaxSize - (ELLIPSES_TEXT.length + 1),74      );75      displayText += ELLIPSES_TEXT;76    } else {77      displayText += name;78    }79    if (nameSpaceLength) {80      displayText += getChars(nameSpaceLength - LEFT_MARGIN, " ");81    }82    displayText += getChars(1, "|");83    displayText += getChars(LEFT_MARGIN, " ");84    if (value.length > (valueMaxSize - ELLIPSES_TEXT.length)) {85      displayText += value.substring(86        0,87        valueMaxSize - (ELLIPSES_TEXT.length + 1),88      );89      displayText += ELLIPSES_TEXT;90    } else {91      displayText += value;92    }93    if (valueSpaceLength) {94      displayText += getChars(valueSpaceLength - LEFT_MARGIN, " ");95    }96    displayText += getChars(1, "|");97    displayText += "\n";98    displayText += getChars(tableLength, "-");99  }100  console.log(displayText);101};...

Using AI Code Generation

1import { mount } from '@vue/test-utils'2import StorybookRoot from './storybook-root.vue'3describe('storybook-root', () => {4  test('getChars method', () => {5    const wrapper = mount(StorybookRoot)6    const result = wrapper.vm.getChars()7    expect(result).toBe('Hello World')8  })9})10export default {11  methods: {12    getChars() {13    }14  }15}16import { mount } from '@vue/test-utils'17import StorybookRoot from './storybook-root.vue'18describe('storybook-root', () => {19  test('getChars method', () => {20    const wrapper = mount(StorybookRoot)21    const result = wrapper.vm.getChars()22    expect(result).toBe('Hello World')23  })24})25      6 |   test('getChars method', () => {26      7 |     const wrapper = mount(StorybookRoot)27    > 8 |     const result = wrapper.vm.getChars()28      9 |     expect(result).toBe('Hello World')29     10 |   })30     11 | })31      at Object.toBe (test.js:8:30)

Using AI Code Generation

1var storybook = require('storybook-root');2storybook.getChars(function(err,chars){3    console.log(chars);4});5storybook.getChars(function(err,chars){6    console.log(chars);7});8require('storybook-root.php');9storybook\getChars(function($err,$chars){10    echo $chars;11});12require('storybook-root.php');13storybook\getChars(function($err,$chars){14    echo $chars;15});16use storybook\storybook;17storybook::getChars(function($err,$chars){18    echo $chars;19});20use storybook\storybook;21$storybook = new storybook();22$storybook->getChars(function($err,$chars){23    echo $chars;24});25use storybook\storybook;26storybook::getChars(function($err,$chars){27    echo $chars;28});29use storybook\storybook;30$storybook = new storybook();31$storybook->getChars(function($err,$chars){32    echo $chars;33});34use storybook\storybook;35storybook::getChars(function($err,$chars){36    echo $chars;37});38use storybook\storybook;39$storybook = new storybook();40$storybook->getChars(function($err,$chars){41    echo $chars;42});43use storybook\storybook;44storybook::getChars(function($err,$chars){45    echo $chars;46});47use storybook\storybook;48$storybook = new storybook();49$storybook->getChars(function($err,$chars){

Using AI Code Generation

1var root = require("storybook-root");2root.getChars();3module.exports = {4    getChars: function() {5        return ["Harry Potter", "Hermione Granger", "Ron Weasley"];6    }7};8var root = require("storybook-root");9root.getChars();10module.exports = {11    getChars: function() {12        return ["Harry Potter", "Hermione Granger", "Ron Weasley"];13    }14};15var root = require("storybook-root");16root.getChars();17module.exports = {18    getChars: function() {19        return ["Harry Potter", "Hermione Granger", "Ron Weasley"];20    }21};22var root = require("storybook-root");23root.getChars();24module.exports = {25    getChars: function() {26        return ["Harry Potter", "Hermione Granger", "Ron Weasley"];27    }28};29var root = require("storybook-root");30root.getChars();31module.exports = {32    getChars: function() {33        return ["Harry Potter", "Hermione Granger", "Ron Weasley"];34    }35};36var root = require("storybook-root");37root.getChars();38module.exports = {39    getChars: function() {40        return ["Harry Potter", "Hermione Granger", "Ron Weasley"];41    }42};43var root = require("storybook-root");44root.getChars();45module.exports = {46    getChars: function() {

Using AI Code Generation

1const { getChars } = require('storybook-root');2getChars().then(chars => {3  console.log(chars);4});5const { getChars } = require('storybook-root');6getChars().then(chars => {7  console.log(chars);8});9const { getChars } = require('storybook-root');10getChars().then(chars => {11  console.log(chars);12});13const { getChars } = require('storybook-root');14getChars().then(chars => {15  console.log(chars);16});17const { getChars } = require('storybook-root');18getChars().then(chars => {19  console.log(chars);20});21const { getChars } = require('storybook-root');22getChars().then(chars => {23  console.log(chars);24});25const { getChars } = require('storybook-root');26getChars().then(chars => {27  console.log(chars);28});29const { getChars } = require('storybook-root');30getChars().then(chars => {31  console.log(chars);32});33const { getChars } = require('storybook-root');34getChars().then(chars => {35  console.log(chars);36});37const { getChars } = require('storybook-root');38getChars().then(chars => {39  console.log(chars);40});41const { getChars } = require('storybook

Using AI Code Generation

1var storybook = require('storybook-root');2storybook.getChars(function(err, chars){3    if(err){4        console.log(err);5    }else{6        console.log(chars);7    }8});9exports.getChars = function(callback){10    fs.readFile(path.join(__dirname, 'data', 'chars.json'), function(err, data){11        if(err){12            callback(err, null);13        }else{14            var chars = JSON.parse(data);15            callback(null, chars);16        }17    });18};19fs.readFile = function(filename, callback){20    fs.open(filename, 'r', function(err, fd){21        if(err){22            callback(err, null);23        }else{24            fs.fstat(fd, function(err, stat){25                if(err){26                    callback(err, null);27                }else{28                    var buf = new Buffer(stat.size);29                    fs.read(fd, buf, 0, stat.size,

Using AI Code Generation

1import React from 'react';2import ReactDOM from 'react-dom';3import { getChars } from './components/storybook-root';4class Test extends React.Component {5  constructor(props) {6    super(props);7    this.state = {8    }9  }10  componentDidMount() {11    getChars()12      .then((chars) => {13        this.setState({14        })15      })16  }17  render() {18    return (19        {this.state.characters.map((char) => {20          return (21              <h1>{char.name}</h1>22              <p>{char.description}</p>23        })}24  }25}26ReactDOM.render(27  document.getElementById('root')28);

Using AI Code Generation

1var storybookRoot = require('storybook-root');2var characters = storybookRoot.getChars();3console.log(characters);4var storybookRoot = require('storybook-root');5var characters = storybookRoot.getChars();6console.log(characters);7var storybookRoot = require('storybook-root');8var characters = storybookRoot.getChars();9console.log(characters);10var storybookRoot = require('storybook-root');11var characters = storybookRoot.getChars();12console.log(characters);13var storybookRoot = require('storybook-root');14var characters = storybookRoot.getChars();15console.log(characters);16var storybookRoot = require('storybook-root');

Using AI Code Generation

1var root = require('storybook-root');2var chars = root.getChars();3var story = root.getStory(chars[0]);4console.log(story);5var root = require('storybook-root');6var chars = root.getChars();7var story = root.getStory(chars[0]);8console.log(story);9var root = require('storybook-root');10var chars = root.getChars();11var story = root.getStory(chars[0]);12console.log(story);13var root = require('storybook-root');14var chars = root.getChars();15var story = root.getStory(chars[0]);16console.log(story);17var root = require('storybook-root');18var chars = root.getChars();19var story = root.getStory(chars[0]);20console.log(story);21var root = require('storybook-root');

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.