Add a test for trimmed paths

crates/cli/tests/cli_run.rs

@@ -1362,6 +1362,29 @@ mod cli_run {
         );
     }
 
+    #[test]
+    fn known_type_error_with_long_path() {
+        check_compile_error(
+            &known_bad_file("UnusedImportButWithALongFileNameForTesting.roc"),
+            &[],
+            indoc!(
+                r#"
+                ── UNUSED IMPORT in ...nown_bad/UnusedImportButWithALongFileNameForTesting.roc ─
+
+                Nothing from Symbol is used in this module.
+
+                3│      imports [Symbol.{ Ident }]
+                                 ^^^^^^^^^^^^^^^^
+
+                Since Symbol isn't used, you don't need to import it.
+
+                ────────────────────────────────────────────────────────────────────────────────
+
+                0 errors and 1 warning found in <ignored for test> ms."#
+            ),
+        );
+    }
+
     #[test]
     fn exposed_not_defined() {
         check_compile_error(

crates/cli/tests/known_bad/UnusedImportButWithALongFileNameForTesting.roc

@@ -0,0 +1,7 @@
+interface UnusedImportButWithALongFileNameForTesting
+    exposes [plainText, emText]
+    imports [Symbol.{ Ident }]
+
+plainText = \str -> PlainText str
+
+emText = \str -> EmText str