add test

Author: iTrooz

tests/stats_output.rs

@@ -0,0 +1,22 @@
+pub mod helpers;
+
+use helpers::SccacheTest;
+use anyhow::Result;
+use predicates::str::PredicateStrExt;
+use serial_test::serial;
+
+#[test]
+#[serial]
+fn test_sccache_cache_size() -> Result<()> {
+    let test_info = SccacheTest::new(None)?;
+
+    test_info
+        .show_text_stats(false)?
+        .try_stdout(
+            predicates::str::is_match(r"^Cache size\s+\d+\s")
+            .unwrap()
+            .from_utf8(),
+        )?
+        .try_success()?;
+    Ok(())
+}