remove non-null assertion operator from std (part1) (#3900)

1 files changed, 8 insertions, 3 deletions

diff --git a/std/examples/tests/xeval_test.ts b/std/examples/tests/xeval_test.ts
index db9cbceee..1c4be1f95 100644
--- a/std/examples/tests/xeval_test.ts
+++ b/std/examples/tests/xeval_test.ts
@@ -1,7 +1,11 @@
 import { xeval } from "../xeval.ts";
 import { stringsReader } from "../../io/util.ts";
 import { decode, encode } from "../../strings/mod.ts";
-import { assertEquals, assertStrContains } from "../../testing/asserts.ts";
+import {
+  assertEquals,
+  assertStrContains,
+  assert
+} from "../../testing/asserts.ts";
 import { test } from "../../testing/mod.ts";
 const { execPath, run } = Deno;
 
@@ -29,8 +33,9 @@ test(async function xevalCliReplvar(): Promise<void> {
     stdout: "piped",
     stderr: "null"
   });
-  await p.stdin!.write(encode("hello"));
-  await p.stdin!.close();
+  assert(p.stdin != null);
+  await p.stdin.write(encode("hello"));
+  await p.stdin.close();
   assertEquals(await p.status(), { code: 0, success: true });
   assertEquals(decode(await p.output()).trimEnd(), "hello");
 });