From 24150eb3c073e8f00ebd6b7d02ffac7ddd0f398e Mon Sep 17 00:00:00 2001
From: bit-aloo <sshourya17@gmail.com>
Date: Tue, 11 Feb 2025 10:33:05 +0530
Subject: [PATCH] add unit test to bootstrap:util:cache:tests

---
 src/bootstrap/src/utils/cache.rs       |  3 ++
 src/bootstrap/src/utils/cache/tests.rs | 52 ++++++++++++++++++++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 src/bootstrap/src/utils/cache/tests.rs

diff --git a/src/bootstrap/src/utils/cache.rs b/src/bootstrap/src/utils/cache.rs
index 650316eebd59..1c8cc4025df1 100644
--- a/src/bootstrap/src/utils/cache.rs
+++ b/src/bootstrap/src/utils/cache.rs
@@ -298,3 +298,6 @@ impl Cache {
         self.0.borrow().contains_key(&TypeId::of::<S>())
     }
 }
+
+#[cfg(test)]
+mod tests;
diff --git a/src/bootstrap/src/utils/cache/tests.rs b/src/bootstrap/src/utils/cache/tests.rs
new file mode 100644
index 000000000000..28f5563a589b
--- /dev/null
+++ b/src/bootstrap/src/utils/cache/tests.rs
@@ -0,0 +1,52 @@
+use std::path::PathBuf;
+
+use crate::utils::cache::{INTERNER, Internable, TyIntern};
+
+#[test]
+fn test_string_interning() {
+    let s1 = INTERNER.intern_str("Hello");
+    let s2 = INTERNER.intern_str("Hello");
+    let s3 = INTERNER.intern_str("world");
+
+    assert_eq!(s1, s2, "Same strings should be interned to the same instance");
+    assert_ne!(s1, s3, "Different strings should have different interned values");
+}
+
+#[test]
+fn test_path_interning() {
+    let p1 = PathBuf::from("/tmp/file").intern();
+    let p2 = PathBuf::from("/tmp/file").intern();
+    let p3 = PathBuf::from("/tmp/other").intern();
+
+    assert_eq!(p1, p2);
+    assert_ne!(p1, p3);
+}
+
+#[test]
+fn test_vec_interning() {
+    let v1 = vec!["a".to_string(), "b".to_string()].intern();
+    let v2 = vec!["a".to_string(), "b".to_string()].intern();
+    let v3 = vec!["c".to_string()].intern();
+
+    assert_eq!(v1, v2);
+    assert_ne!(v1, v3);
+}
+
+#[test]
+fn test_interned_equality() {
+    let s1 = INTERNER.intern_str("test");
+    let s2 = INTERNER.intern_str("test");
+
+    assert_eq!(s1, s2);
+    assert_eq!(s1, "test");
+}
+
+#[test]
+fn test_ty_intern_intern_borrow() {
+    let mut interner = TyIntern::default();
+    let s1 = interner.intern_borrow("borrowed");
+    let s2 = interner.intern("borrowed".to_string());
+
+    assert_eq!(s1, s2);
+    assert_eq!(interner.get(s1), "borrowed");
+}