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| author | Josh Stone <jistone@redhat.com> | 2019-03-26 10:39:03 -0700 |
|---|---|---|
| committer | Josh Stone <jistone@redhat.com> | 2019-03-26 10:39:03 -0700 |
| commit | 3d389f244a2192dd97542657b8a5733dbc8319f9 (patch) | |
| tree | 542aedb4357b80456b6b21a92e46c4a2d073ed9c | |
| parent | 01162d86c533cfb08221bb9475042ca94d1fd002 (diff) | |
| download | rust-3d389f244a2192dd97542657b8a5733dbc8319f9.tar.gz rust-3d389f244a2192dd97542657b8a5733dbc8319f9.zip | |
Test the size_hint of empty ranges too
| -rw-r--r-- | src/libcore/tests/iter.rs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/libcore/tests/iter.rs b/src/libcore/tests/iter.rs index bcf0b7ec463..d5b581d336d 100644 --- a/src/libcore/tests/iter.rs +++ b/src/libcore/tests/iter.rs @@ -1804,20 +1804,24 @@ fn test_range_inclusive_folds() { #[test] fn test_range_size_hint() { use core::usize::MAX as UMAX; + assert_eq!((0..0usize).size_hint(), (0, Some(0))); assert_eq!((0..100usize).size_hint(), (100, Some(100))); assert_eq!((0..UMAX).size_hint(), (UMAX, Some(UMAX))); let umax = u128::try_from(UMAX).unwrap(); + assert_eq!((0..0u128).size_hint(), (0, Some(0))); assert_eq!((0..100u128).size_hint(), (100, Some(100))); assert_eq!((0..umax).size_hint(), (UMAX, Some(UMAX))); assert_eq!((0..umax + 1).size_hint(), (UMAX, None)); use core::isize::{MAX as IMAX, MIN as IMIN}; + assert_eq!((0..0isize).size_hint(), (0, Some(0))); assert_eq!((-100..100isize).size_hint(), (200, Some(200))); assert_eq!((IMIN..IMAX).size_hint(), (UMAX, Some(UMAX))); let imin = i128::try_from(IMIN).unwrap(); let imax = i128::try_from(IMAX).unwrap(); + assert_eq!((0..0i128).size_hint(), (0, Some(0))); assert_eq!((-100..100i128).size_hint(), (200, Some(200))); assert_eq!((imin..imax).size_hint(), (UMAX, Some(UMAX))); assert_eq!((imin..imax + 1).size_hint(), (UMAX, None)); @@ -1826,23 +1830,31 @@ fn test_range_size_hint() { #[test] fn test_range_inclusive_size_hint() { use core::usize::MAX as UMAX; + assert_eq!((1..=0usize).size_hint(), (0, Some(0))); + assert_eq!((0..=0usize).size_hint(), (1, Some(1))); assert_eq!((0..=100usize).size_hint(), (101, Some(101))); assert_eq!((0..=UMAX - 1).size_hint(), (UMAX, Some(UMAX))); assert_eq!((0..=UMAX).size_hint(), (UMAX, None)); let umax = u128::try_from(UMAX).unwrap(); + assert_eq!((1..=0u128).size_hint(), (0, Some(0))); + assert_eq!((0..=0u128).size_hint(), (1, Some(1))); assert_eq!((0..=100u128).size_hint(), (101, Some(101))); assert_eq!((0..=umax - 1).size_hint(), (UMAX, Some(UMAX))); assert_eq!((0..=umax).size_hint(), (UMAX, None)); assert_eq!((0..=umax + 1).size_hint(), (UMAX, None)); use core::isize::{MAX as IMAX, MIN as IMIN}; + assert_eq!((0..=-1isize).size_hint(), (0, Some(0))); + assert_eq!((0..=0isize).size_hint(), (1, Some(1))); assert_eq!((-100..=100isize).size_hint(), (201, Some(201))); assert_eq!((IMIN..=IMAX - 1).size_hint(), (UMAX, Some(UMAX))); assert_eq!((IMIN..=IMAX).size_hint(), (UMAX, None)); let imin = i128::try_from(IMIN).unwrap(); let imax = i128::try_from(IMAX).unwrap(); + assert_eq!((0..=-1i128).size_hint(), (0, Some(0))); + assert_eq!((0..=0i128).size_hint(), (1, Some(1))); assert_eq!((-100..=100i128).size_hint(), (201, Some(201))); assert_eq!((imin..=imax - 1).size_hint(), (UMAX, Some(UMAX))); assert_eq!((imin..=imax).size_hint(), (UMAX, None)); |