test: add unit tests from std/node (#17794)

Adds two test files: "cli/tests/unit_node/process_test.ts" and
"cli/tests/unit_node/child_process_test.ts"

---------

Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/cli/tests/unit_node/testdata/process_stdin.ts b/cli/tests/unit_node/testdata/process_stdin.ts
new file mode 100644
index 000000000..23562b090
--- /dev/null
+++ b/cli/tests/unit_node/testdata/process_stdin.ts
@@ -0,0 +1,11 @@
+import process from "node:process";
+
+console.log(process.stdin.readableHighWaterMark);
+
+process.stdin.setEncoding("utf8");
+process.stdin.on("readable", () => {
+  console.log(process.stdin.read());
+});
+process.stdin.on("end", () => {
+  console.log("end");
+});