livewire-material/tests/Feature/Components/ButtonTest.php

<?php

use NoNameWeb\LivewireMaterial\Tests\Support\ComponentStylesheet;

/**
 * The attributes of the rendered button or link element, by name.
 *
 * @return array<string, string>
 */
function buttonAttributes(string $blade): array
{
    preg_match('/<(?:button|a)\b([^>]*)>/', (string) test()->blade($blade), $tag);
    preg_match_all('/([\w:.-]+)(?:="([^"]*)")?/', $tag[1] ?? '', $pairs, PREG_SET_ORDER);

    return collect($pairs)->mapWithKeys(fn (array $pair): array => [$pair[1] => $pair[2] ?? ''])->all();
}

function buttonCss(): ComponentStylesheet
{
    return ComponentStylesheet::read('button');
}

it('is a text button in the primary colour by default, drawn by its stylesheet', function () {
    expect(buttonAttributes('<x-button label="Cancel" />'))->toBe([
        'class' => 'md-state-layer md-focus-ring md-touch-target',
        'data-md-button' => 'data-md-button',
        'data-md-variant' => 'text',
        'data-md-color' => 'primary',
        'data-md-size' => 'sm',
        'data-md-shape' => 'round',
        'type' => 'button',
    ])
        ->and(buttonCss()->declarations('[data-md-button]'))->toMatchArray([
            '--md-button-container' => 'transparent',
            '--md-button-label' => 'var(--md-button-color)',
            '--md-button-color' => 'var(--md-sys-color-primary)',
            'background-color' => 'var(--md-button-container)',
            'color' => 'var(--md-button-label)',
        ]);
});

it('draws each M3 variant', function (string $variant, array $declarations) {
    expect(buttonAttributes("<x-button label=\"Go\" variant=\"{$variant}\" />"))->toMatchArray(['data-md-variant' => $variant])
        ->and(buttonCss()->declarations("[data-md-button][data-md-variant='{$variant}']"))->toMatchArray($declarations);
})->with([
    'filled' => ['filled', ['--md-button-container' => 'var(--md-button-color)', '--md-button-label' => 'var(--md-button-on-color)']],
    'tonal' => ['tonal', ['--md-button-container' => 'var(--md-button-tone)', '--md-button-label' => 'var(--md-button-on-tone)']],
    'outlined' => ['outlined', ['--md-button-label' => 'var(--md-button-quiet)', '--md-button-outline' => 'var(--md-sys-color-outline-variant)', 'border' => 'var(--md-button-outline-width) solid var(--md-button-outline)']],
    'elevated' => ['elevated', ['--md-button-container' => 'var(--md-sys-color-surface-container-low)', '--md-button-elevation' => 'var(--md-sys-elevation-1)']],
]);

it('draws primary\'s tonal button in secondary-container and its quiet ink in on-surface-variant', function () {
    expect(buttonCss()->declarations('[data-md-button]'))->toMatchArray([
        '--md-button-tone' => 'var(--md-sys-color-secondary-container)',
        '--md-button-on-tone' => 'var(--md-sys-color-on-secondary-container)',
        '--md-button-tone-selected' => 'var(--md-sys-color-secondary)',
        '--md-button-quiet' => 'var(--md-sys-color-on-surface-variant)',
    ])
        ->and(buttonCss()->declarations("[data-md-button]:not([data-md-color='primary'])"))->toBe([
            '--md-button-tone-selected' => 'var(--md-button-color)',
            '--md-button-on-tone-selected' => 'var(--md-button-on-color)',
            '--md-button-quiet' => 'var(--md-button-color)',
        ]);
});

it('draws a variant in another colour role', function (string $color) {
    expect(buttonCss()->declarations("[data-md-button][data-md-color='{$color}']"))->toBe([
        '--md-button-color' => "var(--md-sys-color-{$color})",
        '--md-button-on-color' => "var(--md-sys-color-on-{$color})",
        '--md-button-tone' => "var(--md-sys-color-{$color}-container)",
        '--md-button-on-tone' => "var(--md-sys-color-on-{$color}-container)",
    ]);
})->with(['secondary', 'tertiary', 'error', 'success', 'warning', 'info']);

it('keeps the maryUI and ReStride shorthands', function () {
    expect(buttonAttributes('<x-button label="Save" primary />'))->toMatchArray(['data-md-variant' => 'filled', 'data-md-color' => 'primary'])
        ->and(buttonAttributes('<x-button label="Delete" danger />'))->toMatchArray(['data-md-variant' => 'filled', 'data-md-color' => 'error'])
        ->and(buttonAttributes('<x-button label="Take down" caution />'))->toMatchArray(['data-md-variant' => 'filled', 'data-md-color' => 'warning'])
        ->and(buttonAttributes('<x-button label="Go" variant="outlined" tone="success" />'))->toMatchArray(['data-md-color' => 'success']);
});

it('falls back to the defaults for values it does not know', function () {
    expect(buttonAttributes('<x-button label="Go" variant="glass" color="purple" size="huge" shape="blob" />'))
        ->toMatchArray(['data-md-variant' => 'text', 'data-md-color' => 'primary', 'data-md-size' => 'sm', 'data-md-shape' => 'round']);
});

it('sizes a label button on Expressive\'s scale', function (string $size, array $geometry, string $type, int $icon) {
    $html = (string) $this->blade("<x-button label=\"Upload\" icon=\"upload\" size=\"{$size}\" />");

    expect($html)->toContain("data-md-size=\"{$size}\"")->toContain("--md-icon-size: {$icon}px")
        ->and(buttonCss()->declarations("[data-md-button][data-md-size='{$size}']"))->toMatchArray($geometry)
        ->and(buttonCss()->declarations(in_array($size, ['xs', 'sm'], true)
            ? "[data-md-button]:not([data-md-icon-button]):is([data-md-size='xs'], [data-md-size='sm'])"
            : "[data-md-button]:not([data-md-icon-button])[data-md-size='{$size}']"))->toMatchArray(['font' => "var(--md-sys-typescale-{$type})"]);
})->with([
    'xs' => ['xs', ['--md-button-height' => '32px', '--md-button-padding' => 'var(--md-sys-measurement-space200)', '--md-button-gap' => 'var(--md-sys-measurement-space100)', '--md-button-icon' => '20px'], 'label-lg', 20],
    'sm' => ['sm', ['--md-button-height' => '40px', '--md-button-padding' => 'var(--md-sys-measurement-space200)', '--md-button-gap' => 'var(--md-sys-measurement-space100)', '--md-button-icon' => '20px'], 'label-lg', 20],
    'md' => ['md', ['--md-button-height' => '56px', '--md-button-padding' => 'var(--md-sys-measurement-space300)', '--md-button-gap' => 'var(--md-sys-measurement-space100)', '--md-button-icon' => '24px'], 'title-md', 24],
    'lg' => ['lg', ['--md-button-height' => '96px', '--md-button-padding' => 'var(--md-sys-measurement-space600)', '--md-button-gap' => '12px', '--md-button-icon' => '32px'], 'headline-sm', 32],
    'xl' => ['xl', ['--md-button-height' => '136px', '--md-button-padding' => 'var(--md-sys-measurement-space800)', '--md-button-gap' => 'var(--md-sys-measurement-space200)', '--md-button-icon' => '40px'], 'headline-lg', 40],
]);

it('rounds by default, squares on request, and squares off further while pressed — without specificity', function () {
    expect(buttonAttributes('<x-button label="Go" size="md" shape="square" />'))->toMatchArray(['data-md-shape' => 'square'])
        ->and(buttonCss()->declarations(':where([data-md-button])'))->toBe(['border-radius' => 'var(--md-sys-shape-corner-full)'])
        ->and(buttonCss()->declarations(":where([data-md-button]):where([data-md-shape='square'], [data-md-selected='true'])"))->toBe(['border-radius' => 'var(--md-button-square)'])
        ->and(buttonCss()->declarations(':where([data-md-button]):where(:active)'))->toBe(['border-radius' => 'var(--md-button-pressed)'])
        ->and(buttonCss()->declarations("[data-md-button][data-md-size='md']"))->toMatchArray(['--md-button-square' => 'var(--md-sys-shape-corner-lg)', '--md-button-pressed' => 'var(--md-sys-shape-corner-md)'])
        ->and(buttonCss()->declarations("[data-md-button][data-md-size='xl']"))->toMatchArray(['--md-button-square' => 'var(--md-sys-shape-corner-xl)', '--md-button-pressed' => 'var(--md-sys-shape-corner-lg)']);
});

it('reaches a 48px touch target below the medium size, from the foundation\'s shared class', function () {
    expect(buttonAttributes('<x-button label="Go" size="xs" />')['class'])->toBe('md-state-layer md-focus-ring md-touch-target')
        ->and(buttonAttributes('<x-button label="Go" size="sm" />')['class'])->toBe('md-state-layer md-focus-ring md-touch-target')
        ->and(buttonAttributes('<x-button label="Go" size="md" />')['class'])->toBe('md-state-layer md-focus-ring');
});

it('draws M3\'s state layer and focus ring from the foundation\'s shared classes, not its own', function () {
    $css = buttonCss();

    expect($css->has('[data-md-button]::before'))->toBeFalse()
        ->and($css->has("[data-md-button]:is([data-md-size='xs'], [data-md-size='sm'])::after"))->toBeFalse()
        ->and($css->has('[data-md-button]:focus-visible'))->toBeFalse();
});

it('moves shape on the spatial spring and colour on the effects spring', function () {
    $declarations = buttonCss()->declarations('[data-md-button]');

    expect($declarations['transition-property'])->toBe('border-radius, padding, margin, bottom, background-color, color, box-shadow')
        ->and($declarations['transition-timing-function'])->toBe('var(--md-sys-motion-spatial-fast), var(--md-sys-motion-spatial-fast), var(--md-sys-motion-spatial-fast), var(--md-sys-motion-spatial-fast), var(--md-sys-motion-effects-fast), var(--md-sys-motion-effects-fast), var(--md-sys-motion-effects-fast)');
});

it('fills a default icon button\'s glyph, and draws a 20px one from the 20px cut', function () {
    $geometry = function (string $file): string {
        $svg = trim((string) file_get_contents(__DIR__.'/../../../resources/svg/symbols/'.$file.'.svg'));

        return substr($svg, (int) strpos($svg, '><') + 1);
    };

    // A default icon button is filled, a toggle still reads outlined unselected, filled selected.
    expect((string) $this->blade('<x-button icon="favorite" aria-label="Keep" />'))->toContain($geometry('filled/favorite'))
        ->and((string) $this->blade('<x-button icon="favorite" aria-label="Keep" :selected="false" />'))->toContain($geometry('outlined/favorite'))
        ->and((string) $this->blade('<x-button icon="favorite" aria-label="Keep" :selected="true" />'))->toContain($geometry('filled/favorite'));

    // 20px glyphs come from the 20px cut; 24px ones stay on the default.
    expect((string) $this->blade('<x-button label="Keep" icon="favorite" />'))->toContain($geometry('outlined-20/favorite'))
        ->and((string) $this->blade('<x-button label="Keep" icon="favorite" size="md" />'))->toContain($geometry('outlined/favorite'));
});

it('is an icon button named by its tooltip when it has no label', function () {
    $html = (string) $this->blade('<x-button icon="close" tooltip="Close menu" />');

    expect(buttonAttributes('<x-button icon="close" tooltip="Close menu" />'))
        ->toMatchArray(['data-md-icon-button' => 'data-md-icon-button', 'data-md-width' => 'default', 'aria-label' => 'Close menu'])
        ->and($html)->toContain('--md-icon-size: 24px')->toContain('popover="manual"')->toContain('aria-hidden="true"')
        // M3's standard icon button: on-surface-variant, unless selected.
        ->and(buttonCss()->declarations("[data-md-button][data-md-variant='text'][data-md-icon-button]:not([data-md-selected='true'])"))->toBe(['--md-button-label' => 'var(--md-button-quiet)']);
});

it('sizes an icon button by width', function () {
    expect(buttonAttributes('<x-button icon="share" label="" width="wide" aria-label="Share" />'))->toMatchArray(['data-md-width' => 'wide'])
        ->and(buttonAttributes('<x-button icon="share" size="xl" width="narrow" aria-label="Share" />'))->toMatchArray(['data-md-width' => 'narrow', 'data-md-size' => 'xl'])
        ->and(buttonAttributes('<x-button label="Share" width="wide" />'))->not->toHaveKey('data-md-width')
        ->and(buttonCss()->declarations("[data-md-button][data-md-size='sm']"))->toMatchArray(['--md-button-narrow' => '32px', '--md-button-default' => '40px', '--md-button-wide' => '52px'])
        ->and(buttonCss()->declarations("[data-md-button][data-md-size='xl']"))->toMatchArray(['--md-button-narrow' => '104px', '--md-button-default' => '136px', '--md-button-wide' => '184px'])
        ->and(buttonCss()->declarations("[data-md-button][data-md-icon-button][data-md-width='wide']"))->toBe(['--md-button-width' => 'var(--md-button-wide)']);
});

it('toggles with aria-pressed and M3\'s selected colours and shape', function () {
    $css = buttonCss();

    expect(buttonAttributes('<x-button label="Bold" variant="filled" :selected="true" />'))->toMatchArray(['aria-pressed' => 'true', 'data-md-selected' => 'true'])
        ->and(buttonAttributes('<x-button label="Bold" variant="filled" :selected="false" />'))->toMatchArray(['aria-pressed' => 'false', 'data-md-selected' => 'false'])
        ->and(buttonAttributes('<x-button label="Bold" variant="filled" />'))->not->toHaveKey('data-md-selected')
        ->and($css->declarations("[data-md-button][data-md-variant='filled'][data-md-selected='false']"))->toBe(['--md-button-container' => 'var(--md-sys-color-surface-container)', '--md-button-label' => 'var(--md-sys-color-on-surface-variant)'])
        ->and($css->declarations("[data-md-button][data-md-variant='tonal'][data-md-selected='true']"))->toBe(['--md-button-container' => 'var(--md-button-tone-selected)', '--md-button-label' => 'var(--md-button-on-tone-selected)'])
        ->and($css->declarations("[data-md-button][data-md-variant='outlined'][data-md-selected='true']"))->toBe(['--md-button-container' => 'var(--md-sys-color-inverse-surface)', '--md-button-label' => 'var(--md-sys-color-inverse-on-surface)', '--md-button-outline' => 'transparent'])
        // Text buttons are not toggles in M3: a selected one takes the tonal container.
        ->and($css->declarations("[data-md-button][data-md-variant='text']:not([data-md-icon-button])[data-md-selected='true']"))->toBe(['--md-button-container' => 'var(--md-button-tone)', '--md-button-label' => 'var(--md-button-on-tone)']);
});

it('squares a selected round icon button and rounds a selected square one', function () {
    expect(buttonCss()->declarations(":where([data-md-button]):where([data-md-icon-button][data-md-shape='square'][data-md-selected='true'])"))->toBe(['border-radius' => 'var(--md-sys-shape-corner-full)'])
        ->and(buttonAttributes('<x-button icon="favorite" aria-label="Like" variant="tonal" shape="square" :selected="true" />'))
        ->toMatchArray(['data-md-icon-button' => 'data-md-icon-button', 'data-md-shape' => 'square', 'data-md-selected' => 'true']);
});

it('navigates inside the app, and leaves it for an external link', function () {
    $this->blade('<x-button label="Shares" link="/admin/shares" />')
        ->assertSee('<a ', false)
        ->assertSee('href="/admin/shares"', false)
        ->assertSee('wire:navigate', false)
        ->assertDontSee('type="button"', false);

    $this->blade('<x-button label="M3" link="https://m3.material.io" external />')
        ->assertSee('target="_blank"', false)
        ->assertSee('rel="noopener"', false)
        ->assertDontSee('wire:navigate', false);
});

it('disables a button, and a link as far as a link can be', function () {
    expect(buttonAttributes('<x-button label="Save" variant="filled" disabled />'))->toMatchArray(['disabled' => 'disabled'])
        ->and(buttonAttributes('<x-button label="Shares" link="/admin/shares" disabled />'))->toMatchArray(['aria-disabled' => 'true', 'tabindex' => '-1'])
        ->and(buttonCss()->declarations("[data-md-button]:is(:disabled, [aria-disabled='true'])"))->toBe([
            'box-shadow' => 'none',
            'color' => 'color-mix(in srgb, var(--md-sys-color-on-surface) calc(var(--md-sys-state-disabled-content-opacity) * 100%), transparent)',
        ])
        ->and(buttonCss()->declarations("[data-md-button]:is([data-md-variant='filled'], [data-md-variant='tonal'], [data-md-variant='elevated'], [data-md-variant='outlined'][data-md-selected='true']):is(:disabled, [aria-disabled='true'])"))
        ->toBe(['background-color' => 'color-mix(in srgb, var(--md-sys-color-on-surface) 10%, transparent)'])
        ->and(buttonCss()->declarations("[data-md-button][aria-disabled='true']"))->toBe(['pointer-events' => 'none']);
});

it('shows the loading indicator while its own action runs, in the button\'s own ink', function () {
    $html = (string) $this->blade('<x-button label="Save" wire:click="save" spinner />');

    expect($html)
        ->toContain('wire:loading.attr="disabled"')
        ->toContain('wire:target="save"')
        ->toMatch('/<span wire:loading.flex wire:target="save" data-md-button-spinner>\s*<span data-md-loading="data-md-loading" aria-hidden="true">/')
        ->toMatch('/<span data-md-button-icon\s+wire:loading.remove wire:target="save"\s*>|<span data-md-button-label/')
        ->and(buttonCss()->declarations('[data-md-button-spinner] > [data-md-loading]'))->toBe([
            'inline-size' => 'var(--md-button-icon)',
            'block-size' => 'var(--md-button-icon)',
            'color' => 'currentColor',
        ]);

    $this->blade('<x-button label="Save" wire:click="save" spinner="upload" />')
        ->assertSee('wire:target="upload"', false);
});

it('hides a responsive label below expanded', function () {
    $this->blade('<x-button label="New share" icon="add" responsive />')
        ->assertSee('<span data-md-button-label  data-md-responsive >New share</span>', false);

    expect(buttonCss()->declarations('[data-md-button] > [data-md-responsive]', ['@media (width < 840px)']))->toBe(['display' => 'none']);
});

it('anchors its tooltip to itself', function () {
    $html = (string) $this->blade('<x-button label="Save" tooltip-bottom="Saves the draft" />');

    preg_match('/anchor-name: (--material-button-[a-z0-9]+)/', $html, $anchor);

    expect($anchor)->not->toBeEmpty()
        ->and($html)->toContain("position-anchor: {$anchor[1]}")
        ->toContain('data-md-side="bottom"')
        ->not->toContain('aria-label="Saves the draft"');
});

it('is a FAB on a compact window and a filled button from medium, in one element', function () {
    $html = (string) $this->blade('<x-button label="New share" icon="add" fab />');
    $fab = buttonCss()->declarations('[data-md-button][data-md-compact-fab]', ['@media (width < 600px)']);

    expect(substr_count($html, '<button'))->toBe(1)
        ->and(buttonAttributes('<x-button label="New share" icon="add" fab />'))->toMatchArray(['data-md-compact-fab' => 'data-md-compact-fab', 'data-md-variant' => 'filled'])
        ->and($fab)->toMatchArray([
            'position' => 'fixed',
            'inset-inline-end' => 'var(--md-sys-measurement-space200)',
            '--md-button-height' => '56px',
            'border-radius' => 'var(--md-sys-shape-corner-lg)',
            'background-color' => 'var(--md-sys-color-primary-container)',
            'color' => 'var(--md-sys-color-on-primary-container)',
            'box-shadow' => 'var(--md-sys-elevation-3)',
        ])
        // M3 puts a snackbar above a FAB, never over one: the host publishes its height.
        ->and($fab['bottom'])->toBe('calc(var(--material-bottom-bar, 0px) + var(--material-snackbar-height, 0px) + var(--md-sys-measurement-space200))');
});

it('submits a form when asked', function () {
    $this->blade('<x-button label="Save" type="submit" />')
        ->assertSee('type="submit"', false);
});

it('keeps aria-pressed off a selected link, which is not a toggle', function () {
    expect((string) $this->blade('<x-button label="Plans" link="/plans" :selected="true" />'))
        ->not->toContain('aria-pressed')
        ->toContain('data-md-selected="true"')
        ->and((string) $this->blade('<x-button label="Bold" :selected="true" />'))
        ->toContain('aria-pressed="true"');
});

it('lands a caller\'s class and style on the button untouched, beside the interaction classes', function () {
    expect(buttonAttributes('<x-button label="Save" class="app-save-button" style="margin: 0" tooltip="Save" />'))
        ->toMatchArray(['class' => 'md-state-layer md-focus-ring md-touch-target app-save-button'])
        ->and(buttonAttributes('<x-button label="Save" class="app-save-button" style="margin: 0" tooltip="Save" />')['style'])->toStartWith('anchor-name: --material-button-')->toEndWith('margin: 0;');
});