add test for the repl (would have caught gc bug fixed in previous com…

…mit)

src/targets/repl.test.ts

@@ -0,0 +1,32 @@
+import { spawn } from "first-base";
+import { binaryPath } from "../test-helpers";
+import { sleep } from "a-mimir";
+
+describe("repl", () => {
+  test("basic run", async () => {
+    const run = spawn(binaryPath);
+    await run.outputContains("> ");
+    run.write("2 + 2\n");
+    await run.outputContains("4");
+    // TODO: it's annoying that you have to hit Ctrl+C more than once
+    {
+      run.kill("SIGINT");
+      await sleep.async(10);
+      run.kill("SIGINT");
+    }
+    await run.completion;
+    expect(run.result).toMatchInlineSnapshot(`
+      {
+        "code": 0,
+        "error": false,
+        "stderr": "",
+        "stdout": "> 2 + 2
+      4
+      > 
+      (Press Ctrl-C again to quit)
+      > 
+      ",
+      }
+    `);
+  });
+});