@analogjs/vitest-angular/src/lib/snapshot-serializers/angular-fixture.js

Vitest Builder for Angular

/**
 * Check if is an Angular fixture
 *
 * @param val Angular fixture
 * @returns boolean who check if is an angular fixture
 */
function isAngularFixture(val) {
    if (typeof val !== 'object') {
        return false;
    }
    if (val['componentRef'] || val['componentInstance']) {
        return true;
    }
    if (val['componentType']) {
        return true;
    }
    // * Angular fixture keys in Fixture component Object
    const fixtureKeys = [
        'componentRef',
        'ngZone',
        'effectRunner',
        '_autoDetect',
        '_isStable',
        '_isDestroyed',
        '_resolve',
        '_promise',
        '_onUnstableSubscription',
        '_onStableSubscription',
        '_onMicrotaskEmptySubscription',
        '_onErrorSubscription',
        'changeDetectorRef',
        'elementRef',
        'debugElement',
        'componentInstance',
        'nativeElement',
    ];
    // * Angular fixture keys in Fixture componentRef Object
    const fixtureComponentRefKeys = [
        'location',
        '_rootLView',
        '_tNode',
        'previousInputValues',
        'instance',
        'changeDetectorRef',
        'hostView',
        'componentType',
    ];
    return (JSON.stringify(Object.keys(val)) === JSON.stringify(fixtureKeys) ||
        JSON.stringify(Object.keys(val)) === JSON.stringify(fixtureComponentRefKeys));
}
/**
 * Serialize Angular fixture for Vitest
 *
 * @param fixture Angular Fixture Component
 * @returns HTML Child Node
 */
function fixtureVitestSerializer(fixture) {
    // * Get Component meta data
    const componentType = (fixture && fixture.componentType
        ? fixture.componentType
        : fixture.componentRef.componentType);
    let inputsData = '';
    const selector = Reflect.getOwnPropertyDescriptor(componentType, '__annotations__')?.value[0]
        ?.selector ?? componentType.ɵcmp?.selectors[0]?.[0];
    if (componentType && componentType.propDecorators) {
        inputsData = Object.entries(componentType.propDecorators)
            .map(([key, value]) => `${key}="${value}"`)
            .join('');
    }
    // * Get DOM Elements
    const divElement = fixture && fixture.nativeElement
        ? fixture.nativeElement
        : fixture.location.nativeElement;
    // * Convert string data to HTML data
    const doc = new DOMParser().parseFromString(`<${selector} ${inputsData}>${divElement.innerHTML}</${selector}>`, 'text/html');
    return doc.body.childNodes[0];
}
function normalizeSnapshotOutput(value) {
    return (value
        // Inline snapshots should not fail after formatters strip trailing spaces.
        .replace(/[ \t]+$/gm, '')
        // Comment removal can leave repeated empty lines in pretty-printed output.
        .replace(/\n{3,}/g, '\n\n'));
}
export function createAngularFixtureSnapshotSerializer() {
    return {
        serialize(val, config, indentation, depth, refs, printer) {
            return normalizeSnapshotOutput(printer(fixtureVitestSerializer(val), config, indentation, depth, refs));
        },
        test(val) {
            return val && isAngularFixture(val);
        },
    };
}
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