1 #![allow(
2 clippy::diverging_sub_expression,
3 clippy::if_same_then_else,
4 clippy::ifs_same_cond,
5 clippy::items_after_statements,
6 clippy::let_and_return,
7 clippy::let_underscore_drop,
8 clippy::match_bool,
9 clippy::never_loop,
10 clippy::redundant_closure_call,
11 clippy::redundant_pattern_matching,
12 clippy::too_many_lines,
13 clippy::unit_arg,
14 clippy::while_immutable_condition,
15 clippy::zero_ptr
16 )]
17
18 use anyhow::{anyhow, ensure, Chain, Error, Result};
19 use std::fmt::Debug;
20 use std::iter;
21 use std::marker::{PhantomData, PhantomData as P};
22 use std::ops::Add;
23 use std::ptr;
24
25 struct S;
26
27 impl<T> Add<T> for S {
28 type Output = bool;
add(self, rhs: T) -> Self::Output29 fn add(self, rhs: T) -> Self::Output {
30 let _ = rhs;
31 false
32 }
33 }
34
35 trait Trait: Sized {
36 const V: usize = 0;
t(self, i: i32) -> i3237 fn t(self, i: i32) -> i32 {
38 i
39 }
40 }
41
42 impl<T> Trait for T {}
43
44 #[track_caller]
assert_err<T: Debug>(result: impl FnOnce() -> Result<T>, expected: &'static str)45 fn assert_err<T: Debug>(result: impl FnOnce() -> Result<T>, expected: &'static str) {
46 let actual = result().unwrap_err().to_string();
47
48 let mut accepted_alternatives = expected.split('\n');
49 let expected = accepted_alternatives.next_back().unwrap();
50 if accepted_alternatives.any(|alternative| actual == alternative) {
51 return;
52 }
53
54 assert_eq!(actual, expected);
55 }
56
57 #[test]
test_recursion()58 fn test_recursion() {
59 // Must not blow the default #[recursion_limit], which is 128.
60 #[rustfmt::skip]
61 let test = || Ok(ensure!(
62 false | false | false | false | false | false | false | false | false |
63 false | false | false | false | false | false | false | false | false |
64 false | false | false | false | false | false | false | false | false |
65 false | false | false | false | false | false | false | false | false |
66 false | false | false | false | false | false | false | false | false |
67 false | false | false | false | false | false | false | false | false |
68 false | false | false | false | false | false | false | false | false
69 ));
70
71 test().unwrap_err();
72 }
73
74 #[test]
test_low_precedence_control_flow()75 fn test_low_precedence_control_flow() {
76 #[allow(unreachable_code)]
77 let test = || {
78 let val = loop {
79 // Break has lower precedence than the comparison operators so the
80 // expression here is `S + (break (1 == 1))`. It would be bad if the
81 // ensure macro partitioned this input into `(S + break 1) == (1)`
82 // because that means a different thing than what was written.
83 ensure!(S + break 1 == 1);
84 };
85 Ok(val)
86 };
87
88 assert!(test().unwrap());
89 }
90
91 #[test]
test_low_precedence_binary_operator()92 fn test_low_precedence_binary_operator() {
93 // Must not partition as `false == (true && false)`.
94 let test = || Ok(ensure!(false == true && false));
95 assert_err(test, "Condition failed: `false == true && false`");
96
97 // But outside the root level, it is fine.
98 let test = || Ok(ensure!(while false == true && false {} < ()));
99 assert_err(
100 test,
101 "Condition failed: `while false == true && false { } < ()` (() vs ())",
102 );
103 }
104
105 #[test]
test_closure()106 fn test_closure() {
107 // Must not partition as `(S + move) || (1 == 1)` by treating move as an
108 // identifier, nor as `(S + move || 1) == (1)` by misinterpreting the
109 // closure precedence.
110 let test = || Ok(ensure!(S + move || 1 == 1));
111 assert_err(test, "Condition failed: `S + (move || 1 == 1)`");
112
113 let test = || Ok(ensure!(S + || 1 == 1));
114 assert_err(test, "Condition failed: `S + (|| 1 == 1)`");
115
116 // Must not partition as `S + ((move | ()) | 1) == 1` by treating those
117 // pipes as bitwise-or.
118 let test = || Ok(ensure!(S + move |()| 1 == 1));
119 assert_err(test, "Condition failed: `S + (move |()| 1 == 1)`");
120
121 let test = || Ok(ensure!(S + |()| 1 == 1));
122 assert_err(test, "Condition failed: `S + (|()| 1 == 1)`");
123 }
124
125 #[test]
test_unary()126 fn test_unary() {
127 let mut x = &1;
128 let test = || Ok(ensure!(*x == 2));
129 assert_err(test, "Condition failed: `*x == 2` (1 vs 2)");
130
131 let test = || Ok(ensure!(!x == 1));
132 assert_err(test, "Condition failed: `!x == 1` (-2 vs 1)");
133
134 let test = || Ok(ensure!(-x == 1));
135 assert_err(test, "Condition failed: `-x == 1` (-1 vs 1)");
136
137 let test = || Ok(ensure!(&x == &&2));
138 assert_err(test, "Condition failed: `&x == &&2` (1 vs 2)");
139
140 let test = || Ok(ensure!(&mut x == *&&mut &2));
141 assert_err(test, "Condition failed: `&mut x == *&&mut &2` (1 vs 2)");
142 }
143
144 #[test]
test_if()145 fn test_if() {
146 #[rustfmt::skip]
147 let test = || Ok(ensure!(if false {}.t(1) == 2));
148 assert_err(test, "Condition failed: `if false { }.t(1) == 2` (1 vs 2)");
149
150 #[rustfmt::skip]
151 let test = || Ok(ensure!(if false {} else {}.t(1) == 2));
152 assert_err(
153 test,
154 "Condition failed: `if false { } else { }.t(1) == 2` (1 vs 2)",
155 );
156
157 #[rustfmt::skip]
158 let test = || Ok(ensure!(if false {} else if false {}.t(1) == 2));
159 assert_err(
160 test,
161 "Condition failed: `if false { } else if false { }.t(1) == 2` (1 vs 2)",
162 );
163
164 #[rustfmt::skip]
165 let test = || Ok(ensure!(if let 1 = 2 {}.t(1) == 2));
166 assert_err(
167 test,
168 "Condition failed: `if let 1 = 2 { }.t(1) == 2` (1 vs 2)",
169 );
170
171 #[rustfmt::skip]
172 let test = || Ok(ensure!(if let 1 | 2 = 2 {}.t(1) == 2));
173 assert_err(
174 test,
175 "Condition failed: `if let 1 | 2 = 2 { }.t(1) == 2` (1 vs 2)",
176 );
177
178 #[rustfmt::skip]
179 let test = || Ok(ensure!(if let | 1 | 2 = 2 {}.t(1) == 2));
180 assert_err(
181 test,
182 "Condition failed: `if let 1 | 2 = 2 { }.t(1) == 2` (1 vs 2)",
183 );
184 }
185
186 #[test]
test_loop()187 fn test_loop() {
188 #[rustfmt::skip]
189 let test = || Ok(ensure!(1 + loop { break 1 } == 1));
190 assert_err(
191 test,
192 // 1.54 puts a double space after loop
193 "Condition failed: `1 + loop { break 1 } == 1` (2 vs 1)\n\
194 Condition failed: `1 + loop { break 1 } == 1` (2 vs 1)",
195 );
196
197 #[rustfmt::skip]
198 let test = || Ok(ensure!(1 + 'a: loop { break 'a 1 } == 1));
199 assert_err(
200 test,
201 // 1.54 puts a double space after loop
202 "Condition failed: `1 + 'a: loop { break 'a 1 } == 1` (2 vs 1)\n\
203 Condition failed: `1 + 'a: loop { break 'a 1 } == 1` (2 vs 1)",
204 );
205
206 #[rustfmt::skip]
207 let test = || Ok(ensure!(while false {}.t(1) == 2));
208 assert_err(
209 test,
210 "Condition failed: `while false { }.t(1) == 2` (1 vs 2)",
211 );
212
213 #[rustfmt::skip]
214 let test = || Ok(ensure!(while let None = Some(1) {}.t(1) == 2));
215 assert_err(
216 test,
217 "Condition failed: `while let None = Some(1) { }.t(1) == 2` (1 vs 2)",
218 );
219
220 #[rustfmt::skip]
221 let test = || Ok(ensure!(for _x in iter::once(0) {}.t(1) == 2));
222 assert_err(
223 test,
224 "Condition failed: `for _x in iter::once(0) { }.t(1) == 2` (1 vs 2)",
225 );
226
227 #[rustfmt::skip]
228 let test = || Ok(ensure!(for | _x in iter::once(0) {}.t(1) == 2));
229 assert_err(
230 test,
231 "Condition failed: `for _x in iter::once(0) { }.t(1) == 2` (1 vs 2)",
232 );
233
234 #[rustfmt::skip]
235 let test = || Ok(ensure!(for true | false in iter::empty() {}.t(1) == 2));
236 assert_err(
237 test,
238 "Condition failed: `for true | false in iter::empty() { }.t(1) == 2` (1 vs 2)",
239 );
240 }
241
242 #[test]
test_match()243 fn test_match() {
244 #[rustfmt::skip]
245 let test = || Ok(ensure!(match 1 == 1 { true => 1, false => 0 } == 2));
246 assert_err(
247 test,
248 "Condition failed: `match 1 == 1 { true => 1, false => 0, } == 2` (1 vs 2)",
249 );
250 }
251
252 #[test]
test_atom()253 fn test_atom() {
254 let test = || Ok(ensure!([false, false].len() > 3));
255 assert_err(
256 test,
257 "Condition failed: `[false, false].len() > 3` (2 vs 3)",
258 );
259
260 #[rustfmt::skip]
261 let test = || Ok(ensure!({ let x = 1; x } >= 3));
262 assert_err(test, "Condition failed: `{ let x = 1; x } >= 3` (1 vs 3)");
263
264 let test = || Ok(ensure!(S + async { 1 } == true));
265 assert_err(
266 test,
267 "Condition failed: `S + async { 1 } == true` (false vs true)",
268 );
269
270 let test = || Ok(ensure!(S + async move { 1 } == true));
271 assert_err(
272 test,
273 "Condition failed: `S + async move { 1 } == true` (false vs true)",
274 );
275
276 let x = &1;
277 let test = || Ok(ensure!(S + unsafe { ptr::read(x) } == true));
278 assert_err(
279 test,
280 "Condition failed: `S + unsafe { ptr::read(x) } == true` (false vs true)",
281 );
282 }
283
284 #[test]
test_path()285 fn test_path() {
286 let test = || Ok(ensure!(crate::S.t(1) == 2));
287 assert_err(test, "Condition failed: `crate::S.t(1) == 2` (1 vs 2)");
288
289 let test = || Ok(ensure!(::anyhow::Error::root_cause.t(1) == 2));
290 assert_err(
291 test,
292 "Condition failed: `::anyhow::Error::root_cause.t(1) == 2` (1 vs 2)",
293 );
294
295 let test = || Ok(ensure!(Error::msg::<&str>.t(1) == 2));
296 assert_err(
297 test,
298 "Condition failed: `Error::msg::<&str>.t(1) == 2` (1 vs 2)",
299 );
300
301 #[rustfmt::skip]
302 let test = || Ok(ensure!(Error::msg::<&str,>.t(1) == 2));
303 assert_err(
304 test,
305 "Condition failed: `Error::msg::<&str>.t(1) == 2` (1 vs 2)",
306 );
307
308 let test = || Ok(ensure!(Error::msg::<<str as ToOwned>::Owned>.t(1) == 2));
309 assert_err(
310 test,
311 "Condition failed: `Error::msg::<<str as ToOwned>::Owned>.t(1) == 2` (1 vs 2)",
312 );
313
314 let test = || Ok(ensure!(Chain::<'static>::new.t(1) == 2));
315 assert_err(
316 test,
317 "Condition failed: `Chain::<'static>::new.t(1) == 2` (1 vs 2)",
318 );
319
320 #[rustfmt::skip]
321 let test = || Ok(ensure!(Chain::<'static,>::new.t(1) == 2));
322 assert_err(
323 test,
324 "Condition failed: `Chain::<'static>::new.t(1) == 2` (1 vs 2)",
325 );
326
327 #[derive(PartialOrd, PartialEq, Debug)]
328 enum E<'a, T> {
329 #[allow(dead_code)]
330 T(&'a T),
331 U,
332 }
333
334 #[rustfmt::skip]
335 let test = || Ok(ensure!(E::U::<>>E::U::<u8>));
336 assert_err(test, "Condition failed: `E::U::<> > E::U::<u8>` (U vs U)");
337
338 #[rustfmt::skip]
339 let test = || Ok(ensure!(E::U::<u8>>E::U));
340 assert_err(test, "Condition failed: `E::U::<u8> > E::U` (U vs U)");
341
342 #[rustfmt::skip]
343 let test = || Ok(ensure!(E::U::<u8,>>E::U));
344 assert_err(test, "Condition failed: `E::U::<u8> > E::U` (U vs U)");
345
346 let test = || Ok(ensure!(PhantomData::<dyn Debug + Sync> != PhantomData));
347 assert_err(
348 test,
349 "Condition failed: `PhantomData::<dyn Debug + Sync> != PhantomData` (PhantomData vs PhantomData)",
350 );
351
352 let test = || Ok(ensure!(PhantomData::<dyn Fn() + Sync> != PhantomData));
353 assert_err(
354 test,
355 "Condition failed: `PhantomData::<dyn Fn() + Sync> != PhantomData` (PhantomData vs PhantomData)",
356 );
357
358 #[rustfmt::skip]
359 let test = || {
360 Ok(ensure!(
361 PhantomData::<dyn Fn::() + ::std::marker::Sync> != PhantomData
362 ))
363 };
364 assert_err(
365 test,
366 "Condition failed: `PhantomData::<dyn Fn() + ::std::marker::Sync> != PhantomData` (PhantomData vs PhantomData)",
367 );
368 }
369
370 #[test]
test_macro()371 fn test_macro() {
372 let test = || Ok(ensure!(anyhow!("...").to_string().len() <= 1));
373 assert_err(
374 test,
375 "Condition failed: `anyhow!(\"...\").to_string().len() <= 1` (3 vs 1)",
376 );
377
378 let test = || Ok(ensure!(vec![1].len() < 1));
379 assert_err(test, "Condition failed: `vec![1].len() < 1` (1 vs 1)");
380
381 let test = || Ok(ensure!(stringify! {} != ""));
382 assert_err(
383 test,
384 "Condition failed: `stringify! { } != \"\"` (\"\" vs \"\")",
385 );
386 }
387
388 #[test]
test_trailer()389 fn test_trailer() {
390 let test = || Ok(ensure!((|| 1)() == 2));
391 assert_err(test, "Condition failed: `(|| 1)() == 2` (1 vs 2)");
392
393 let test = || Ok(ensure!(b"hmm"[1] == b'c'));
394 assert_err(test, "Condition failed: `b\"hmm\"[1] == b'c'` (109 vs 99)");
395
396 let test = || Ok(ensure!(PhantomData::<u8> {} != PhantomData));
397 assert_err(
398 test,
399 "Condition failed: `PhantomData::<u8>{} != PhantomData` (PhantomData vs PhantomData)",
400 );
401
402 let result = Ok::<_, Error>(1);
403 let test = || Ok(ensure!(result? == 2));
404 assert_err(test, "Condition failed: `result? == 2` (1 vs 2)");
405
406 let test = || Ok(ensure!((2, 3).1 == 2));
407 assert_err(test, "Condition failed: `(2, 3).1 == 2` (3 vs 2)");
408
409 #[rustfmt::skip]
410 let test = || Ok(ensure!((2, (3, 4)). 1.1 == 2));
411 assert_err(test, "Condition failed: `(2, (3, 4)).1.1 == 2` (4 vs 2)");
412
413 let err = anyhow!("");
414 let test = || Ok(ensure!(err.is::<&str>() == false));
415 assert_err(
416 test,
417 "Condition failed: `err.is::<&str>() == false` (true vs false)",
418 );
419
420 let test = || Ok(ensure!(err.is::<<str as ToOwned>::Owned>() == true));
421 assert_err(
422 test,
423 "Condition failed: `err.is::<<str as ToOwned>::Owned>() == true` (false vs true)",
424 );
425 }
426
427 #[test]
test_whitespace()428 fn test_whitespace() {
429 #[derive(Debug)]
430 pub struct Point {
431 pub x: i32,
432 pub y: i32,
433 }
434
435 let point = Point { x: 0, y: 0 };
436 let test = || Ok(ensure!("" == format!("{:#?}", point)));
437 assert_err(
438 test,
439 "Condition failed: `\"\" == format!(\"{:#?}\", point)`",
440 );
441 }
442
443 #[test]
test_too_long()444 fn test_too_long() {
445 let test = || Ok(ensure!("" == "x".repeat(10)));
446 assert_err(
447 test,
448 "Condition failed: `\"\" == \"x\".repeat(10)` (\"\" vs \"xxxxxxxxxx\")",
449 );
450
451 let test = || Ok(ensure!("" == "x".repeat(80)));
452 assert_err(test, "Condition failed: `\"\" == \"x\".repeat(80)`");
453 }
454
455 #[test]
test_as()456 fn test_as() {
457 let test = || Ok(ensure!('\0' as u8 > 1));
458 assert_err(test, "Condition failed: `'\\0' as u8 > 1` (0 vs 1)");
459
460 let test = || Ok(ensure!('\0' as ::std::primitive::u8 > 1));
461 assert_err(
462 test,
463 "Condition failed: `'\\0' as ::std::primitive::u8 > 1` (0 vs 1)",
464 );
465
466 let test = || Ok(ensure!(&[0] as &[i32] == [1]));
467 assert_err(
468 test,
469 "Condition failed: `&[0] as &[i32] == [1]` ([0] vs [1])",
470 );
471
472 let test = || Ok(ensure!(0 as *const () as *mut _ == 1 as *mut ()));
473 assert_err(
474 test,
475 "Condition failed: `0 as *const () as *mut _ == 1 as *mut ()` (0x0 vs 0x1)",
476 );
477
478 let s = "";
479 let test = || Ok(ensure!(s as &str != s));
480 assert_err(test, "Condition failed: `s as &str != s` (\"\" vs \"\")");
481
482 let test = || Ok(ensure!(&s as &&str != &s));
483 assert_err(test, "Condition failed: `&s as &&str != &s` (\"\" vs \"\")");
484
485 let test = || Ok(ensure!(s as &'static str != s));
486 assert_err(
487 test,
488 "Condition failed: `s as &'static str != s` (\"\" vs \"\")",
489 );
490
491 let test = || Ok(ensure!(&s as &&'static str != &s));
492 assert_err(
493 test,
494 "Condition failed: `&s as &&'static str != &s` (\"\" vs \"\")",
495 );
496
497 let m: &mut str = Default::default();
498 let test = || Ok(ensure!(m as &mut str != s));
499 assert_err(
500 test,
501 "Condition failed: `m as &mut str != s` (\"\" vs \"\")",
502 );
503
504 let test = || Ok(ensure!(&m as &&mut str != &s));
505 assert_err(
506 test,
507 "Condition failed: `&m as &&mut str != &s` (\"\" vs \"\")",
508 );
509
510 let test = || Ok(ensure!(&m as &&'static mut str != &s));
511 assert_err(
512 test,
513 "Condition failed: `&m as &&'static mut str != &s` (\"\" vs \"\")",
514 );
515
516 let f = || {};
517 let test = || Ok(ensure!(f as fn() as usize * 0 != 0));
518 assert_err(
519 test,
520 "Condition failed: `f as fn() as usize * 0 != 0` (0 vs 0)",
521 );
522
523 let test = || Ok(ensure!(f as fn() -> () as usize * 0 != 0));
524 assert_err(
525 test,
526 "Condition failed: `f as fn() -> () as usize * 0 != 0` (0 vs 0)",
527 );
528
529 let test = || Ok(ensure!(f as for<'a> fn() as usize * 0 != 0));
530 assert_err(
531 test,
532 "Condition failed: `f as for<'a>fn() as usize * 0 != 0` (0 vs 0)",
533 );
534
535 let test = || Ok(ensure!(f as unsafe fn() as usize * 0 != 0));
536 assert_err(
537 test,
538 "Condition failed: `f as unsafe fn() as usize * 0 != 0` (0 vs 0)",
539 );
540
541 #[rustfmt::skip]
542 let test = || Ok(ensure!(f as extern "Rust" fn() as usize * 0 != 0));
543 assert_err(
544 test,
545 "Condition failed: `f as extern \"Rust\" fn() as usize * 0 != 0` (0 vs 0)",
546 );
547
548 extern "C" fn extern_fn() {}
549 #[rustfmt::skip]
550 let test = || Ok(ensure!(extern_fn as extern fn() as usize * 0 != 0));
551 assert_err(
552 test,
553 "Condition failed: `extern_fn as extern fn() as usize * 0 != 0` (0 vs 0)",
554 );
555
556 let f = || -> ! { panic!() };
557 let test = || Ok(ensure!(f as fn() -> ! as usize * 0 != 0));
558 assert_err(
559 test,
560 "Condition failed: `f as fn() -> ! as usize * 0 != 0` (0 vs 0)",
561 );
562
563 trait EqDebug<T>: PartialEq<T> + Debug {
564 type Assoc;
565 }
566
567 impl<S, T> EqDebug<T> for S
568 where
569 S: PartialEq<T> + Debug,
570 {
571 type Assoc = bool;
572 }
573
574 let test = || Ok(ensure!(&0 as &dyn EqDebug<i32, Assoc = bool> != &0));
575 assert_err(
576 test,
577 "Condition failed: `&0 as &dyn EqDebug<i32, Assoc = bool> != &0` (0 vs 0)",
578 );
579
580 let test = || {
581 Ok(ensure!(
582 PhantomData as PhantomData<<i32 as ToOwned>::Owned> != PhantomData
583 ))
584 };
585 assert_err(
586 test,
587 "Condition failed: `PhantomData as PhantomData<<i32 as ToOwned>::Owned> != PhantomData` (PhantomData vs PhantomData)",
588 );
589
590 macro_rules! int {
591 (...) => {
592 u8
593 };
594 }
595
596 let test = || Ok(ensure!(0 as int!(...) != 0));
597 assert_err(test, "Condition failed: `0 as int!(...) != 0` (0 vs 0)");
598
599 let test = || Ok(ensure!(0 as int![...] != 0));
600 assert_err(test, "Condition failed: `0 as int![...] != 0` (0 vs 0)");
601
602 let test = || Ok(ensure!(0 as int! {...} != 0));
603 assert_err(test, "Condition failed: `0 as int! { ... } != 0` (0 vs 0)");
604 }
605
606 #[test]
test_pat()607 fn test_pat() {
608 let test = || Ok(ensure!(if let ref mut _x @ 0 = 0 { 0 } else { 1 } == 1));
609 assert_err(
610 test,
611 "Condition failed: `if let ref mut _x @ 0 = 0 { 0 } else { 1 } == 1` (0 vs 1)",
612 );
613
614 let test = || Ok(ensure!(if let -1..=1 = 0 { 0 } else { 1 } == 1));
615 assert_err(
616 test,
617 "Condition failed: `if let -1 ..=1 = 0 { 0 } else { 1 } == 1` (0 vs 1)",
618 );
619
620 let test = || Ok(ensure!(if let &0 = &0 { 0 } else { 1 } == 1));
621 assert_err(
622 test,
623 "Condition failed: `if let &0 = &0 { 0 } else { 1 } == 1` (0 vs 1)",
624 );
625
626 let test = || Ok(ensure!(if let &&0 = &&0 { 0 } else { 1 } == 1));
627 assert_err(
628 test,
629 "Condition failed: `if let &&0 = &&0 { 0 } else { 1 } == 1` (0 vs 1)",
630 );
631
632 let test = || Ok(ensure!(if let &mut 0 = &mut 0 { 0 } else { 1 } == 1));
633 assert_err(
634 test,
635 "Condition failed: `if let &mut 0 = &mut 0 { 0 } else { 1 } == 1` (0 vs 1)",
636 );
637
638 let test = || Ok(ensure!(if let &&mut 0 = &&mut 0 { 0 } else { 1 } == 1));
639 assert_err(
640 test,
641 "Condition failed: `if let &&mut 0 = &&mut 0 { 0 } else { 1 } == 1` (0 vs 1)",
642 );
643
644 let test = || Ok(ensure!(if let (0, 1) = (0, 1) { 0 } else { 1 } == 1));
645 assert_err(
646 test,
647 "Condition failed: `if let (0, 1) = (0, 1) { 0 } else { 1 } == 1` (0 vs 1)",
648 );
649
650 let test = || Ok(ensure!(if let [0] = b"\0" { 0 } else { 1 } == 1));
651 assert_err(
652 test,
653 "Condition failed: `if let [0] = b\"\\0\" { 0 } else { 1 } == 1` (0 vs 1)",
654 );
655
656 let p = PhantomData::<u8>;
657 let test = || Ok(ensure!(if let P::<u8> {} = p { 0 } else { 1 } == 1));
658 assert_err(
659 test,
660 "Condition failed: `if let P::<u8> { } = p { 0 } else { 1 } == 1` (0 vs 1)",
661 );
662
663 let test = || Ok(ensure!(if let ::std::marker::PhantomData = p {} != ()));
664 assert_err(
665 test,
666 "Condition failed: `if let ::std::marker::PhantomData = p { } != ()` (() vs ())",
667 );
668
669 let test = || Ok(ensure!(if let <S as Trait>::V = 0 { 0 } else { 1 } == 1));
670 assert_err(
671 test,
672 "Condition failed: `if let <S as Trait>::V = 0 { 0 } else { 1 } == 1` (0 vs 1)",
673 );
674
675 let test = || Ok(ensure!(for _ in iter::once(()) {} != ()));
676 assert_err(
677 test,
678 "Condition failed: `for _ in iter::once(()) { } != ()` (() vs ())",
679 );
680
681 let test = || Ok(ensure!(if let stringify!(x) = "x" { 0 } else { 1 } == 1));
682 assert_err(
683 test,
684 "Condition failed: `if let stringify!(x) = \"x\" { 0 } else { 1 } == 1` (0 vs 1)",
685 );
686 }
687