Regression test for #07540

test/regression/issue/07540.test.ts

@@ -0,0 +1,53 @@
+import { $, spawnSync } from "bun";
+import { bunEnv, bunExe, tempDirWithFiles } from "harness";
+
+describe("strict mode escape sequences", () => {
+  tempDirWithFiles("07540", {});
+  const cases = [
+    { code: "\\7" },
+    { code: "a\\x0q" },
+    { code: "a\\xm" },
+    { code: "a\\x1Be" },
+    { code: "q\\7w" },
+    { code: "q\\303a" },
+    { code: "/\\7" },
+    { code: "/\\9" },
+  ];
+  for (const c of cases) {
+    const tagged_version = "String.raw`" + c.code + "`";
+    const regular_version = "`" + c.code + "`";
+    const string_version = "'" + c.code + "'";
+    for (const version of [tagged_version, regular_version, string_version]) {
+      let expected;
+      try {
+        expected = eval(version);
+      } catch (e) {
+        expected = e;
+      }
+      it.todoIf(expected instanceof Error)(version, () => {
+        const { stdout, stderr, exitCode } = spawnSync({
+          cmd: [bunExe(), "-e", `console.log(${version})`],
+          env: bunEnv,
+        });
+        if (expected instanceof Error) {
+          expect({
+            exitCode: exitCode,
+            stdout: stdout.toString(),
+          }).toEqual({
+            exitCode: 0,
+            stdout: "",
+          });
+          expect(exitCode).not.toBe(0);
+        } else {
+          expect({
+            exitCode: exitCode,
+            stdout: stdout.toString(),
+          }).toEqual({
+            exitCode: 0,
+            stdout: expected + "\n",
+          });
+        }
+      });
+    }
+  }
+});