feat(repl): add --eval flag for evaluating code when the repl starts (#11590)

1 files changed, 43 insertions, 1 deletions

diff --git a/cli/tests/integration/repl_tests.rs b/cli/tests/integration/repl_tests.rs
index b96b398ae..7ce91d406 100644
--- a/cli/tests/integration/repl_tests.rs
+++ b/cli/tests/integration/repl_tests.rs
@@ -436,7 +436,7 @@ fn exports_stripped() {
 }
 
 #[test]
-fn eval_unterminated() {
+fn call_eval_unterminated() {
   let (out, err) = util::run_and_collect_output(
     true,
     "repl",
@@ -644,3 +644,45 @@ fn custom_inspect() {
   assert!(out.contains("Oops custom inspect error"));
   assert!(err.is_empty());
 }
+
+#[test]
+fn eval_flag_valid_input() {
+  let (out, err) = util::run_and_collect_output_with_args(
+    true,
+    vec!["repl", "--eval", "const t = 10;"],
+    Some(vec!["t * 500;"]),
+    None,
+    false,
+  );
+  assert!(out.contains("5000"));
+  assert!(err.is_empty());
+}
+
+#[test]
+fn eval_flag_parse_error() {
+  let (out, err) = util::run_and_collect_output_with_args(
+    true,
+    vec!["repl", "--eval", "const %"],
+    Some(vec!["250 * 10"]),
+    None,
+    false,
+  );
+  assert!(test_util::strip_ansi_codes(&out)
+    .contains("error in --eval flag. parse error: Unexpected token `%`."));
+  assert!(out.contains("2500")); // should not prevent input
+  assert!(err.is_empty());
+}
+
+#[test]
+fn eval_flag_runtime_error() {
+  let (out, err) = util::run_and_collect_output_with_args(
+    true,
+    vec!["repl", "--eval", "throw new Error('Testing')"],
+    Some(vec!["250 * 10"]),
+    None,
+    false,
+  );
+  assert!(out.contains("error in --eval flag. Uncaught Error: Testing"));
+  assert!(out.contains("2500")); // should not prevent input
+  assert!(err.is_empty());
+}