6 files changed, 40 insertions, 0 deletions
diff --git a/std/wasi/testdata/std_env_args.rs b/std/wasi/testdata/std_env_args.rs
new file mode 100644
index 000000000..09151e549
--- /dev/null
+++ b/std/wasi/testdata/std_env_args.rs
@@ -0,0 +1,6 @@
+// { "args": ["one", "two", "three" ]}
+
+fn main() {
+  let args = std::env::args();
+  assert_eq!(args.len(), 3);
+}
diff --git a/std/wasi/testdata/std_env_vars.rs b/std/wasi/testdata/std_env_vars.rs
new file mode 100644
index 000000000..5c088a5fa
--- /dev/null
+++ b/std/wasi/testdata/std_env_vars.rs
@@ -0,0 +1,6 @@
+// { "env": { "one": "1", "two": "2", "three": "3" } }
+
+fn main() {
+  let vars = std::env::vars();
+  assert_eq!(vars.count(), 3);
+}
diff --git a/std/wasi/testdata/std_io_stderr.rs b/std/wasi/testdata/std_io_stderr.rs
new file mode 100644
index 000000000..8e1dee30e
--- /dev/null
+++ b/std/wasi/testdata/std_io_stderr.rs
@@ -0,0 +1,7 @@
+// { "stderr": "Hello, stderr!" }
+
+use std::io::Write;
+
+fn main() {
+  assert!(std::io::stderr().write_all(b"Hello, stderr!").is_ok())
+}
diff --git a/std/wasi/testdata/std_io_stdin.rs b/std/wasi/testdata/std_io_stdin.rs
new file mode 100644
index 000000000..170d575c5
--- /dev/null
+++ b/std/wasi/testdata/std_io_stdin.rs
@@ -0,0 +1,9 @@
+// { "stdin": "Hello, stdin!" }
+
+use std::io::Read;
+
+fn main() {
+  let mut buffer = String::new();
+  assert!(std::io::stdin().read_to_string(&mut buffer).is_ok());
+  assert_eq!(buffer, "Hello, stdin!")
+}
diff --git a/std/wasi/testdata/std_io_stdout.rs b/std/wasi/testdata/std_io_stdout.rs
new file mode 100644
index 000000000..3c9058a0d
--- /dev/null
+++ b/std/wasi/testdata/std_io_stdout.rs
@@ -0,0 +1,7 @@
+// { "stdout": "Hello, stdout!" }
+
+use std::io::Write;
+
+fn main() {
+  assert!(std::io::stdout().write_all(b"Hello, stdout!").is_ok())
+}
diff --git a/std/wasi/testdata/std_process_exit.rs b/std/wasi/testdata/std_process_exit.rs
new file mode 100644
index 000000000..0a0287c54
--- /dev/null
+++ b/std/wasi/testdata/std_process_exit.rs
@@ -0,0 +1,5 @@
+// { "exitCode": "120" }
+
+fn main() {
+  std::process::exit(120);
+}