tapper/tests/Unit/ScrollTest.php at master · tapperphp/tapper · GitHub

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<?php

declare(strict_types=1);

use Tapper\Console\State\AppState;

use Tapper\Console\Support\Scroll;

beforeEach(function () {

$this->appState = new AppState;

$this->scroll = new Scroll($this->appState);

});

describe('cursor movement', function () {

it('cursor down', function () {

$this->appState->cursor = 0;

$this->appState->offset = 0;

$this->scroll->cursorDown(count: 10, visible: 5);

expect($this->appState->cursor)->toBe(1);

expect($this->appState->offset)->toBe(0);

});

it('stops moving cursor at the end', function () {

$this->appState->cursor = 9;

$this->appState->offset = 5;

$this->scroll->cursorDown(count: 10, visible: 5);

expect($this->appState->cursor)->toBe(9);

expect($this->appState->offset)->toBe(5);

});

it('move offset on cursor down', function () {

$this->appState->cursor = 4;

$this->appState->offset = 0;

$this->scroll->cursorDown(count: 10, visible: 5);

expect($this->appState->cursor)->toBe(5);

expect($this->appState->offset)->toBe(1);

});

it('do not move cursor up if on top', function () {

$this->appState->cursor = 0;

$this->appState->offset = 0;

$this->scroll->cursorUp(count: 10, visible: 5);

expect($this->appState->cursor)->toBe(0);

expect($this->appState->offset)->toBe(0);

});

it('move cursor up', function () {

$this->appState->cursor = 1;

$this->appState->offset = 0;

$this->scroll->cursorUp(count: 10, visible: 5);

expect($this->appState->cursor)->toBe(0);

expect($this->appState->offset)->toBe(0);

});

it('do not move offset when cursor and offset is on bottom', function () {

$this->appState->cursor = 9;

$this->appState->offset = 5;

$this->scroll->cursorUp(count: 10, visible: 5);

expect($this->appState->cursor)->toBe(8);

expect($this->appState->offset)->toBe(5);

});

it('move offset together with scroll', function () {

$this->appState->cursor = 5;

$this->appState->offset = 5;

$this->scroll->cursorUp(count: 10, visible: 5);

expect($this->appState->cursor)->toBe(4);

expect($this->appState->offset)->toBe(4);

});

it('moves everything to bottom', function () {

$this->appState->cursor = 5;

$this->appState->offset = 2;

$this->scroll->scrollToBottom(count: 10, visible: 5);

expect($this->appState->cursor)->toBe(9);

expect($this->appState->offset)->toBe(5);

});

describe('scroll movement', function () {

it('scrolls down with cursor when on top', function () {

$this->appState->cursor = 0;

$this->appState->offset = 0;

$this->scroll->scrollDown(count: 10, visible: 5);

expect($this->appState->cursor)->toBe(1);

expect($this->appState->offset)->toBe(1);

});

it('scrolls down but not move cursor if not on top', function () {

$this->appState->cursor = 2;

$this->appState->offset = 0;

$this->scroll->scrollDown(count: 10, visible: 5);

expect($this->appState->cursor)->toBe(2);

expect($this->appState->offset)->toBe(1);

});

it('do not scroll if at the bottom', function () {

$this->appState->cursor = 8;

$this->appState->offset = 5;

$this->scroll->scrollDown(count: 10, visible: 5);

expect($this->appState->cursor)->toBe(8);

expect($this->appState->offset)->toBe(5);

});

it('do not scroll if at the top', function () {

$this->appState->cursor = 2;

$this->appState->offset = 0;

$this->scroll->scrollUp(count: 10, visible: 5);

expect($this->appState->cursor)->toBe(2);

expect($this->appState->offset)->toBe(0);

});

it('scrolls if in the middle', function () {

$this->appState->cursor = 4;

$this->appState->offset = 2;

$this->scroll->scrollUp(count: 10, visible: 5);

expect($this->appState->cursor)->toBe(4);

expect($this->appState->offset)->toBe(1);

});

it('scrolls with cursor if on bottom', function () {

$this->appState->cursor = 9;

$this->appState->offset = 5;

$this->scroll->scrollUp(count: 10, visible: 5);

expect($this->appState->cursor)->toBe(8);

expect($this->appState->offset)->toBe(4);

});

describe('scroll jumping', function () {

it('jump to specific item', function () {

$this->appState->cursor = 0;

$this->appState->offset = 0;

$this->scroll->jump(position: 2, count: 10, visible: 5);

expect($this->appState->cursor)->toBe(2);

expect($this->appState->offset)->toBe(0);

});

it('moving offset up on jump', function () {

$this->appState->cursor = 9;

$this->appState->offset = 5;

$this->scroll->jump(position: 2, count: 10, visible: 5);

expect($this->appState->cursor)->toBe(2);

expect($this->appState->offset)->toBe(2);

});

it('moving offset down on jump', function () {

$this->appState->cursor = 0;

$this->appState->offset = 0;

$this->scroll->jump(position: 7, count: 10, visible: 5);

expect($this->appState->cursor)->toBe(7);

expect($this->appState->offset)->toBe(3);

});

it('jump to top if less than 0', function () {

$this->appState->cursor = 4;

$this->appState->offset = 2;

$this->scroll->jump(position: -2, count: 10, visible: 5);

expect($this->appState->cursor)->toBe(0);

expect($this->appState->offset)->toBe(0);

});

it('jump to the end if more than count', function () {

$this->appState->cursor = 0;

$this->appState->offset = 0;

$this->scroll->jump(position: 12, count: 10, visible: 5);

expect($this->appState->cursor)->toBe(9);

expect($this->appState->offset)->toBe(5);

});

describe('proportional thumb', function () {

it('returns null when everything already fits on screen', function () {

expect(Scroll::proportionalThumb(count: 5, visible: 20, offset: 0, trackHeight: 20))->toBeNull();

});

it('sizes the thumb against the true visible/count ratio, not scrollbarState\'s count-visible one', function () {

// Regression: with count=13, visible=8, scrollbarState()'s contentLength is only

// 5 (count - visible), so feeding that into ScrollbarRenderer's size formula

// (viewport / contentLength) gives 8/5 > 1 — a thumb that fills the whole

// 8-row track even though barely more than half the content is visible.

[$start, $end] = Scroll::proportionalThumb(count: 13, visible: 8, offset: 0, trackHeight: 8);

expect($end - $start)->toBe((int) round((8 / 13) * 8))

->and($end - $start)->toBeLessThan(8);

});

it('starts the thumb at the top when offset is 0', function () {

[$start] = Scroll::proportionalThumb(count: 13, visible: 8, offset: 0, trackHeight: 8);

expect($start)->toBe(0);

});

it('reaches the very bottom of the track at the max offset', function () {

$count = 13;

$visible = 8;

$trackHeight = 8;

$maxOffset = $count - $visible;

[, $end] = Scroll::proportionalThumb($count, $visible, $maxOffset, $trackHeight);

expect($end)->toBe($trackHeight);

});

tapper/tests/Unit/ScrollTest.php at master · tapperphp/tapper · GitHub

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