node_modules/prismjs/tests/languages/puppet/interpolation_feature.test

"$foo ${::foo} ${foo::bar.foobar}
${foobar(42)} ${::interfaces.split(",")[3]}
${[1,20,3].filter |$value| { $value < 10 }}"

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[
	["string", [["double-quoted", [
		"\"",
		["interpolation", ["$foo"]],
		["interpolation", [
			["delimiter", "$"], ["punctuation", "{"],
			["short-variable", [["punctuation", "::"], "foo"]],
			["punctuation", "}"]
		]],
		["interpolation", [
			["delimiter", "$"], ["punctuation", "{"],
			["short-variable", ["foo", ["punctuation", "::"], "bar"]],
			["punctuation", "."], ["function", "foobar"],
			["punctuation", "}"]
		]],
		["interpolation", [
			["delimiter", "$"], ["punctuation", "{"],
			["function", "foobar"], ["punctuation", "("],
			["number", "42"], ["punctuation", ")"],
			["punctuation", "}"]
		]],
		["interpolation", [
			["delimiter", "$"], ["punctuation", "{"],
			["short-variable", [["punctuation", "::"], "interfaces"]],
			["punctuation", "."], ["function", "split"],
			["punctuation", "("], ["string", [["double-quoted", ["\",\""]]]],
			["punctuation", ")"], ["punctuation", "["],
			["number", "3"], ["punctuation", "]"],
			["punctuation", "}"]
		]],
		["interpolation", [
			["delimiter", "$"], ["punctuation", "{"],
			["punctuation", "["], ["number", "1"],
			["punctuation", ","], ["number", "20"],
			["punctuation", ","], ["number", "3"], ["punctuation", "]"],
			["punctuation", "."], ["function", "filter"],
			["operator", "|"], ["variable", ["$value"]], ["operator", "|"],
			["punctuation", "{"], ["variable", ["$value"]],
			["operator", "<"], ["number", "10"], ["punctuation", "}"],
			["punctuation", "}"]
		]],
		"\""
	]]]]
]

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Checks for interpolation.