assertFileCollection example

$config = $this->configFactory->createFromBundle($theme);

        $basePath = $this->stripProjectDir($basePath);

        static::assertEquals('TestTheme', $config->getTechnicalName());
        static::assertEquals($basePath . '/Resources', $config->getBasePath());
        static::assertTrue($config->getIsTheme());
        static::assertEquals(
            $basePath . '/Resources/app/storefront/src/main.js',
            $config->getStorefrontEntryFilepath()
        );
        $this->assertFileCollection([
            $basePath . '/Resources/app/storefront/src/scss/overrides.scss' => [],
            '@Storefront' => [],
            $basePath . '/Resources/app/storefront/src/scss/base.scss' => [
                'vendor' => $basePath . '/Resources/app/storefront/vendor',
            ],
        ], $config->getStyleFiles());
        $this->assertFileCollection([
            '@Storefront' => [],
            $basePath . '/Resources/app/storefront/dist/js/main.js' => [],
        ], $config->getScriptFiles());
        static::assertEquals([