From 64f097b0ffee0b0ffdabe5e983640027ba4a1d1a Mon Sep 17 00:00:00 2001
From: Raymon Zutekouw <40148684+Raymonzut@users.noreply.github.com>
Date: Fri, 14 Jan 2022 22:41:19 +0100
Subject: [PATCH] Test parse_constant

---
 src/main.rs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/main.rs b/src/main.rs
index ea5ae19..5cf6497 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -249,3 +249,23 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     Ok(())
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_parse_constant() {
+        assert_eq!(parse_constant(&"42"), Ok(42));
+        assert_eq!(parse_constant(&"0x2A"), Ok(42));
+        assert_eq!(parse_constant(&"\"*\""), Ok(42));
+
+        assert!(
+            matches!(
+                parse_constant(&"\'*\'"),
+                Err(std::num::ParseIntError { .. })
+            ),
+            "Char literals are declared with \"_\", not \'_\'"
+        );
+    }
+}