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src/tests/expand.rs

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+use parse::lex::{Tk, TkFlags, TkRule};
+use state::write_vars;
+use super::super::*;
+
+#[test]
+fn simple_expansion() {
+	let varsub = "$foo";
+	write_vars(|v| v.new_var("foo", "this is the value of the variable".into()));
+
+	let mut tokens: Vec<Tk> = LexStream::new(varsub, LexFlags::empty())
+		.filter(|tk| !matches!(tk.class, TkRule::EOI | TkRule::SOI))
+		.collect();
+		let var_tk = tokens.pop().unwrap();
+
+		let var_span = var_tk.span.clone();
+		let exp_tk = var_tk.expand(var_span, TkFlags::empty());
+		write_vars(|v| v.vars_mut().clear());
+		insta::assert_debug_snapshot!(exp_tk.get_words())
+}