use cargo_platform::{Cfg, CfgExpr, Platform};
use std::fmt;
use std::str::FromStr;
macro_rules! c {
($a:ident) => {
Cfg::Name(stringify!($a).to_string())
};
($a:ident = $e:expr) => {
Cfg::KeyPair(stringify!($a).to_string(), $e.to_string())
};
}
macro_rules! e {
(any($($t:tt),*)) => (CfgExpr::Any(vec![$(e!($t)),*]));
(all($($t:tt),*)) => (CfgExpr::All(vec![$(e!($t)),*]));
(not($($t:tt)*)) => (CfgExpr::Not(Box::new(e!($($t)*))));
(($($t:tt)*)) => (e!($($t)*));
($($t:tt)*) => (CfgExpr::Value(c!($($t)*)));
}
fn good<T>(s: &str, expected: T)
where
T: FromStr + PartialEq + fmt::Debug,
T::Err: fmt::Display,
{
let c = match T::from_str(s) {
Ok(c) => c,
Err(e) => panic!("failed to parse `{}`: {}", s, e),
};
assert_eq!(c, expected);
}
fn bad<T>(s: &str, err: &str)
where
T: FromStr + fmt::Display,
T::Err: fmt::Display,
{
let e = match T::from_str(s) {
Ok(cfg) => panic!("expected `{}` to not parse but got {}", s, cfg),
Err(e) => e.to_string(),
};
assert!(
e.contains(err),
"when parsing `{}`,\n\"{}\" not contained \
inside: {}",
s,
err,
e
);
}
#[test]
fn cfg_syntax() {
good("foo", c!(foo));
good("_bar", c!(_bar));
good(" foo", c!(foo));
good(" foo ", c!(foo));
good(" foo = \"bar\"", c!(foo = "bar"));
good("foo=\"\"", c!(foo = ""));
good(" foo=\"3\" ", c!(foo = "3"));
good("foo = \"3 e\"", c!(foo = "3 e"));
}
#[test]
fn cfg_syntax_bad() {
bad::<Cfg>("", "but cfg expression ended");
bad::<Cfg>(" ", "but cfg expression ended");
bad::<Cfg>("\t", "unexpected character");
bad::<Cfg>("7", "unexpected character");
bad::<Cfg>("=", "expected identifier");
bad::<Cfg>(",", "expected identifier");
bad::<Cfg>("(", "expected identifier");
bad::<Cfg>("foo (", "unexpected content `(` found after cfg expression");
bad::<Cfg>("bar =", "expected a string");
bad::<Cfg>("bar = \"", "unterminated string");
bad::<Cfg>(
"foo, bar",
"unexpected content `, bar` found after cfg expression",
);
}
#[test]
fn cfg_expr() {
good("foo", e!(foo));
good("_bar", e!(_bar));
good(" foo", e!(foo));
good(" foo ", e!(foo));
good(" foo = \"bar\"", e!(foo = "bar"));
good("foo=\"\"", e!(foo = ""));
good(" foo=\"3\" ", e!(foo = "3"));
good("foo = \"3 e\"", e!(foo = "3 e"));
good("all()", e!(all()));
good("all(a)", e!(all(a)));
good("all(a, b)", e!(all(a, b)));
good("all(a, )", e!(all(a)));
good("not(a = \"b\")", e!(not(a = "b")));
good("not(all(a))", e!(not(all(a))));
}
#[test]
fn cfg_expr_bad() {
bad::<CfgExpr>(" ", "but cfg expression ended");
bad::<CfgExpr>(" all", "expected `(`");
bad::<CfgExpr>("all(a", "expected `)`");
bad::<CfgExpr>("not", "expected `(`");
bad::<CfgExpr>("not(a", "expected `)`");
bad::<CfgExpr>("a = ", "expected a string");
bad::<CfgExpr>("all(not())", "expected identifier");
bad::<CfgExpr>(
"foo(a)",
"unexpected content `(a)` found after cfg expression",
);
}
#[test]
fn cfg_matches() {
assert!(e!(foo).matches(&[c!(bar), c!(foo), c!(baz)]));
assert!(e!(any(foo)).matches(&[c!(bar), c!(foo), c!(baz)]));
assert!(e!(any(foo, bar)).matches(&[c!(bar)]));
assert!(e!(any(foo, bar)).matches(&[c!(foo)]));
assert!(e!(all(foo, bar)).matches(&[c!(foo), c!(bar)]));
assert!(e!(all(foo, bar)).matches(&[c!(foo), c!(bar)]));
assert!(e!(not(foo)).matches(&[c!(bar)]));
assert!(e!(not(foo)).matches(&[]));
assert!(e!(any((not(foo)), (all(foo, bar)))).matches(&[c!(bar)]));
assert!(e!(any((not(foo)), (all(foo, bar)))).matches(&[c!(foo), c!(bar)]));
assert!(!e!(foo).matches(&[]));
assert!(!e!(foo).matches(&[c!(bar)]));
assert!(!e!(foo).matches(&[c!(fo)]));
assert!(!e!(any(foo)).matches(&[]));
assert!(!e!(any(foo)).matches(&[c!(bar)]));
assert!(!e!(any(foo)).matches(&[c!(bar), c!(baz)]));
assert!(!e!(all(foo)).matches(&[c!(bar), c!(baz)]));
assert!(!e!(all(foo, bar)).matches(&[c!(bar)]));
assert!(!e!(all(foo, bar)).matches(&[c!(foo)]));
assert!(!e!(all(foo, bar)).matches(&[]));
assert!(!e!(not(bar)).matches(&[c!(bar)]));
assert!(!e!(not(bar)).matches(&[c!(baz), c!(bar)]));
assert!(!e!(any((not(foo)), (all(foo, bar)))).matches(&[c!(foo)]));
}
#[test]
fn bad_target_name() {
bad::<Platform>(
"any(cfg(unix), cfg(windows))",
"failed to parse `any(cfg(unix), cfg(windows))` as a cfg expression: \
invalid target specifier: unexpected `(` character, \
cfg expressions must start with `cfg(`",
);
bad::<Platform>(
"!foo",
"failed to parse `!foo` as a cfg expression: \
invalid target specifier: unexpected character ! in target name",
);
}
#[test]
fn round_trip_platform() {
fn rt(s: &str) {
let p = Platform::from_str(s).unwrap();
let s2 = p.to_string();
let p2 = Platform::from_str(&s2).unwrap();
assert_eq!(p, p2);
}
rt("x86_64-apple-darwin");
rt("foo");
rt("cfg(windows)");
rt("cfg(target_os = \"windows\")");
rt(
"cfg(any(all(any(target_os = \"android\", target_os = \"linux\"), \
any(target_arch = \"aarch64\", target_arch = \"arm\", target_arch = \"powerpc64\", \
target_arch = \"x86\", target_arch = \"x86_64\")), \
all(target_os = \"freebsd\", target_arch = \"x86_64\")))",
);
}
#[test]
fn check_cfg_attributes() {
fn ok(s: &str) {
let p = Platform::Cfg(s.parse().unwrap());
let mut warnings = Vec::new();
p.check_cfg_attributes(&mut warnings);
assert!(
warnings.is_empty(),
"Expected no warnings but got: {:?}",
warnings,
);
}
fn warn(s: &str, names: &[&str]) {
let p = Platform::Cfg(s.parse().unwrap());
let mut warnings = Vec::new();
p.check_cfg_attributes(&mut warnings);
assert_eq!(
warnings.len(),
names.len(),
"Expecter warnings about {:?} but got {:?}",
names,
warnings,
);
for (name, warning) in names.iter().zip(warnings.iter()) {
assert!(
warning.contains(name),
"Expected warning about '{}' but got: {}",
name,
warning,
);
}
}
ok("unix");
ok("windows");
ok("any(not(unix), windows)");
ok("foo");
ok("target_arch = \"abc\"");
ok("target_feature = \"abc\"");
ok("target_os = \"abc\"");
ok("target_family = \"abc\"");
ok("target_env = \"abc\"");
ok("target_endian = \"abc\"");
ok("target_pointer_width = \"abc\"");
ok("target_vendor = \"abc\"");
ok("bar = \"def\"");
warn("test", &["test"]);
warn("debug_assertions", &["debug_assertions"]);
warn("proc_macro", &["proc_macro"]);
warn("feature = \"abc\"", &["feature"]);
warn("any(not(debug_assertions), windows)", &["debug_assertions"]);
warn(
"any(not(feature = \"def\"), target_arch = \"abc\")",
&["feature"],
);
warn(
"any(not(target_os = \"windows\"), proc_macro)",
&["proc_macro"],
);
warn(
"any(not(feature = \"windows\"), proc_macro)",
&["feature", "proc_macro"],
);
warn(
"all(not(debug_assertions), any(windows, proc_macro))",
&["debug_assertions", "proc_macro"],
);
}
