Refactor tests/ with a common module.

Cargo.toml

@@ -9,6 +9,7 @@ repository = "https://github.com/edn-rs/edn-rs"
 keywords = ["EDN", "no_std"]
 license = "MIT"
 edition = "2021"
+resolver = "2"
 
 [lints.rust]
 rust_2018_idioms = "warn"

tests/deserialize.rs

@@ -7,10 +7,8 @@ mod test {
 
     use edn_rs::{edn, from_edn, from_str, hmap, map, Edn, List, Map, Vector};
 
-    fn err_as_string(s: &str) -> String {
-        let err = Edn::from_str(s).err().unwrap();
-        format!("{err:?}")
-    }
+    mod common;
+    use crate::test::common::err_as_string;
 
     #[test]
     fn unit() {

tests/deserialize_sets.rs

@@ -9,10 +9,8 @@ mod test {
     use edn::{List, Vector};
     use edn_rs::{edn, from_edn, from_str, hset, map, set, Edn, EdnError, Map, Set};
 
-    fn err_as_string(s: &str) -> String {
-        let err = Edn::from_str(s).err().unwrap();
-        format!("{err:?}")
-    }
+    mod common;
+    use crate::test::common::err_as_string;
 
     #[test]
     fn parse_set_with_commas() {

tests/ser.rs

@@ -1,3 +1,5 @@
+#![recursion_limit = "512"]
+
 #[cfg(test)]
 mod tests {
     use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};

tests/test/common.rs

@@ -0,0 +1,7 @@
+use core::str::FromStr;
+use edn_rs::Edn;
+
+pub fn err_as_string(s: &str) -> String {
+    let err = Edn::from_str(s).err().unwrap();
+    format!("{err:?}")
+}