1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
// Copyright 2019 The Fuchsia Authors
//
// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0
// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT
// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.
// This file may not be copied, modified, or distributed except according to
// those terms.
use std::env;
use testutil::set_rustflags_w_warnings;
fn test(subdir: &str) {
let version = testutil::ToolchainVersion::extract_from_pwd().unwrap();
// See the doc comment on this method for an explanation of what this does
// and why we store source files in different directories.
let source_files_dirname = version.get_ui_source_files_dirname_and_maybe_print_warning();
// Set `-Wwarnings` in the `RUSTFLAGS` environment variable to ensure that
// `.stderr` files reflect what the typical user would encounter.
set_rustflags_w_warnings();
let t = trybuild::TestCases::new();
t.compile_fail(format!("tests/{}/{}/*.rs", source_files_dirname, subdir));
}
#[test]
#[cfg_attr(miri, ignore)]
fn ui() {
test("");
// This tests the behavior when `--cfg zerocopy_derive_union_into_bytes` is
// not present, so remove it. If this logic is wrong, that's fine - it will
// exhibit as a test failure that we can debug at that point.
let rustflags = env::var("RUSTFLAGS").unwrap();
let new_rustflags = rustflags.replace("--cfg zerocopy_derive_union_into_bytes", "");
// SAFETY: None of our code is concurrently accessinv env vars. It's
// possible that the test framework has spawned other threads that are
// concurrently accessing env vars, but we can't do anything about that.
#[allow(unused_unsafe)] // `set_var` is safe on our MSRV.
unsafe {
env::set_var("RUSTFLAGS", new_rustflags)
};
test("union_into_bytes_cfg");
// Reset RUSTFLAGS in case we later add other tests which rely on its value.
// This isn't strictly necessary, but it's easier to add this now when we're
// thinking about the semantics of these env vars than to debug later when
// we've forgotten about it.
//
// SAFETY: See previous safety comment.
#[allow(unused_unsafe)] // `set_var` is safe on our MSRV.
unsafe {
env::set_var("RUSTFLAGS", rustflags)
};
}