add a test to test if relatives imports are working

tests/imports.rs

@@ -24,6 +24,17 @@ fn nested() {
     assert_eq!(prog.eval(), Ok(Term::Num(3.)));
 }
 
+#[test]
+fn root_path() {
+    use nickel::term::Term;
+    let mut prog = Program::new_from_source(
+        BufReader::new(mk_import("root_path.ncl").as_bytes()),
+        "should_be = 44",
+    )
+    .unwrap();
+    assert_eq!(prog.eval(), Ok(Term::Num(44.)));
+}
+
 #[test]
 fn multi_imports() {
     use nickel::term::Term;

tests/imports/root_path.ncl

@@ -0,0 +1 @@
+import "root_path/import.ncl"

tests/imports/root_path/fourtytwo.ncl

@@ -0,0 +1 @@
+21 + 21

tests/imports/root_path/import.ncl

@@ -0,0 +1 @@
+(import "fourtytwo.ncl") + (import "../two.ncl")