From 949c96660c32ff9b19a639b4be607938c2262653 Mon Sep 17 00:00:00 2001 From: Alexis Bourget Date: Tue, 8 Sep 2020 23:29:36 +0200 Subject: [PATCH] move format! interface tests --- library/alloc/tests/fmt.rs | 323 ++++++++++++++++++++++++++++++++++++- src/test/ui/ifmt.rs | 319 ------------------------------------ 2 files changed, 322 insertions(+), 320 deletions(-) delete mode 100644 src/test/ui/ifmt.rs diff --git a/library/alloc/tests/fmt.rs b/library/alloc/tests/fmt.rs index 0ad092b4997..6fd6468c3ce 100644 --- a/library/alloc/tests/fmt.rs +++ b/library/alloc/tests/fmt.rs @@ -1,7 +1,328 @@ -use std::fmt; +#![deny(warnings)] +#![allow(unused_must_use)] + +use std::cell::RefCell; +use std::fmt::{self, Write}; #[test] fn test_format() { let s = fmt::format(format_args!("Hello, {}!", "world")); assert_eq!(s, "Hello, world!"); } + +struct A; +struct B; +struct C; +struct D; + +impl fmt::LowerHex for A { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str("aloha") + } +} +impl fmt::UpperHex for B { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str("adios") + } +} +impl fmt::Display for C { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.pad_integral(true, "☃", "123") + } +} +impl fmt::Binary for D { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str("aa")?; + f.write_char('☃')?; + f.write_str("bb") + } +} + +macro_rules! t { + ($a:expr, $b:expr) => { + assert_eq!($a, $b) + }; +} + +#[test] +fn test_format_macro_interface() { + // Various edge cases without formats + t!(format!(""), ""); + t!(format!("hello"), "hello"); + t!(format!("hello {{"), "hello {"); + + // default formatters should work + t!(format!("{}", 1.0f32), "1"); + t!(format!("{}", 1.0f64), "1"); + t!(format!("{}", "a"), "a"); + t!(format!("{}", "a".to_string()), "a"); + t!(format!("{}", false), "false"); + t!(format!("{}", 'a'), "a"); + + // At least exercise all the formats + t!(format!("{}", true), "true"); + t!(format!("{}", '☃'), "☃"); + t!(format!("{}", 10), "10"); + t!(format!("{}", 10_usize), "10"); + t!(format!("{:?}", '☃'), "'☃'"); + t!(format!("{:?}", 10), "10"); + t!(format!("{:?}", 10_usize), "10"); + t!(format!("{:?}", "true"), "\"true\""); + t!(format!("{:?}", "foo\nbar"), "\"foo\\nbar\""); + t!( + format!("{:?}", "foo\n\"bar\"\r\n\'baz\'\t\\qux\\"), + r#""foo\n\"bar\"\r\n\'baz\'\t\\qux\\""# + ); + t!(format!("{:?}", "foo\0bar\x01baz\u{7f}q\u{75}x"), r#""foo\u{0}bar\u{1}baz\u{7f}qux""#); + t!(format!("{:o}", 10_usize), "12"); + t!(format!("{:x}", 10_usize), "a"); + t!(format!("{:X}", 10_usize), "A"); + t!(format!("{}", "foo"), "foo"); + t!(format!("{}", "foo".to_string()), "foo"); + if cfg!(target_pointer_width = "32") { + t!(format!("{:#p}", 0x1234 as *const isize), "0x00001234"); + t!(format!("{:#p}", 0x1234 as *mut isize), "0x00001234"); + } else { + t!(format!("{:#p}", 0x1234 as *const isize), "0x0000000000001234"); + t!(format!("{:#p}", 0x1234 as *mut isize), "0x0000000000001234"); + } + t!(format!("{:p}", 0x1234 as *const isize), "0x1234"); + t!(format!("{:p}", 0x1234 as *mut isize), "0x1234"); + t!(format!("{:x}", A), "aloha"); + t!(format!("{:X}", B), "adios"); + t!(format!("foo {} ☃☃☃☃☃☃", "bar"), "foo bar ☃☃☃☃☃☃"); + t!(format!("{1} {0}", 0, 1), "1 0"); + t!(format!("{foo} {bar}", foo = 0, bar = 1), "0 1"); + t!(format!("{foo} {1} {bar} {0}", 0, 1, foo = 2, bar = 3), "2 1 3 0"); + t!(format!("{} {0}", "a"), "a a"); + t!(format!("{_foo}", _foo = 6usize), "6"); + t!(format!("{foo_bar}", foo_bar = 1), "1"); + t!(format!("{}", 5 + 5), "10"); + t!(format!("{:#4}", C), "☃123"); + t!(format!("{:b}", D), "aa☃bb"); + + let a: &dyn fmt::Debug = &1; + t!(format!("{:?}", a), "1"); + + // Formatting strings and their arguments + t!(format!("{}", "a"), "a"); + t!(format!("{:4}", "a"), "a "); + t!(format!("{:4}", "☃"), "☃ "); + t!(format!("{:>4}", "a"), " a"); + t!(format!("{:<4}", "a"), "a "); + t!(format!("{:^5}", "a"), " a "); + t!(format!("{:^5}", "aa"), " aa "); + t!(format!("{:^4}", "a"), " a "); + t!(format!("{:^4}", "aa"), " aa "); + t!(format!("{:.4}", "a"), "a"); + t!(format!("{:4.4}", "a"), "a "); + t!(format!("{:4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); + t!(format!("{:<4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); + t!(format!("{:>4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); + t!(format!("{:^4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); + t!(format!("{:>10.4}", "aaaaaaaaaaaaaaaaaa"), " aaaa"); + t!(format!("{:2.4}", "aaaaa"), "aaaa"); + t!(format!("{:2.4}", "aaaa"), "aaaa"); + t!(format!("{:2.4}", "aaa"), "aaa"); + t!(format!("{:2.4}", "aa"), "aa"); + t!(format!("{:2.4}", "a"), "a "); + t!(format!("{:0>2}", "a"), "0a"); + t!(format!("{:.*}", 4, "aaaaaaaaaaaaaaaaaa"), "aaaa"); + t!(format!("{:.1$}", "aaaaaaaaaaaaaaaaaa", 4), "aaaa"); + t!(format!("{:.a$}", "aaaaaaaaaaaaaaaaaa", a = 4), "aaaa"); + t!(format!("{:._a$}", "aaaaaaaaaaaaaaaaaa", _a = 4), "aaaa"); + t!(format!("{:1$}", "a", 4), "a "); + t!(format!("{1:0$}", 4, "a"), "a "); + t!(format!("{:a$}", "a", a = 4), "a "); + t!(format!("{:-#}", "a"), "a"); + t!(format!("{:+#}", "a"), "a"); + t!(format!("{:/^10.8}", "1234567890"), "/12345678/"); + + // Some float stuff + t!(format!("{:}", 1.0f32), "1"); + t!(format!("{:}", 1.0f64), "1"); + t!(format!("{:.3}", 1.0f64), "1.000"); + t!(format!("{:10.3}", 1.0f64), " 1.000"); + t!(format!("{:+10.3}", 1.0f64), " +1.000"); + t!(format!("{:+10.3}", -1.0f64), " -1.000"); + + t!(format!("{:e}", 1.2345e6f32), "1.2345e6"); + t!(format!("{:e}", 1.2345e6f64), "1.2345e6"); + t!(format!("{:E}", 1.2345e6f64), "1.2345E6"); + t!(format!("{:.3e}", 1.2345e6f64), "1.234e6"); + t!(format!("{:10.3e}", 1.2345e6f64), " 1.234e6"); + t!(format!("{:+10.3e}", 1.2345e6f64), " +1.234e6"); + t!(format!("{:+10.3e}", -1.2345e6f64), " -1.234e6"); + + // Float edge cases + t!(format!("{}", -0.0), "0"); + t!(format!("{:?}", -0.0), "-0.0"); + t!(format!("{:?}", 0.0), "0.0"); + + // sign aware zero padding + t!(format!("{:<3}", 1), "1 "); + t!(format!("{:>3}", 1), " 1"); + t!(format!("{:^3}", 1), " 1 "); + t!(format!("{:03}", 1), "001"); + t!(format!("{:<03}", 1), "001"); + t!(format!("{:>03}", 1), "001"); + t!(format!("{:^03}", 1), "001"); + t!(format!("{:+03}", 1), "+01"); + t!(format!("{:<+03}", 1), "+01"); + t!(format!("{:>+03}", 1), "+01"); + t!(format!("{:^+03}", 1), "+01"); + t!(format!("{:#05x}", 1), "0x001"); + t!(format!("{:<#05x}", 1), "0x001"); + t!(format!("{:>#05x}", 1), "0x001"); + t!(format!("{:^#05x}", 1), "0x001"); + t!(format!("{:05}", 1.2), "001.2"); + t!(format!("{:<05}", 1.2), "001.2"); + t!(format!("{:>05}", 1.2), "001.2"); + t!(format!("{:^05}", 1.2), "001.2"); + t!(format!("{:05}", -1.2), "-01.2"); + t!(format!("{:<05}", -1.2), "-01.2"); + t!(format!("{:>05}", -1.2), "-01.2"); + t!(format!("{:^05}", -1.2), "-01.2"); + t!(format!("{:+05}", 1.2), "+01.2"); + t!(format!("{:<+05}", 1.2), "+01.2"); + t!(format!("{:>+05}", 1.2), "+01.2"); + t!(format!("{:^+05}", 1.2), "+01.2"); + + // Ergonomic format_args! + t!(format!("{0:x} {0:X}", 15), "f F"); + t!(format!("{0:x} {0:X} {}", 15), "f F 15"); + t!(format!("{:x}{0:X}{a:x}{:X}{1:x}{a:X}", 13, 14, a = 15), "dDfEeF"); + t!(format!("{a:x} {a:X}", a = 15), "f F"); + + // And its edge cases + t!( + format!( + "{a:.0$} {b:.0$} {0:.0$}\n{a:.c$} {b:.c$} {c:.c$}", + 4, + a = "abcdefg", + b = "hijklmn", + c = 3 + ), + "abcd hijk 4\nabc hij 3" + ); + t!(format!("{a:.*} {0} {:.*}", 4, 3, "efgh", a = "abcdef"), "abcd 4 efg"); + t!(format!("{:.a$} {a} {a:#x}", "aaaaaa", a = 2), "aa 2 0x2"); + + // Test that pointers don't get truncated. + { + let val = usize::MAX; + let exp = format!("{:#x}", val); + t!(format!("{:p}", val as *const isize), exp); + } + + // Escaping + t!(format!("{{"), "{"); + t!(format!("}}"), "}"); + + // make sure that format! doesn't move out of local variables + let a = Box::new(3); + format!("{}", a); + format!("{}", a); + + // make sure that format! doesn't cause spurious unused-unsafe warnings when + // it's inside of an outer unsafe block + unsafe { + let a: isize = ::std::mem::transmute(3_usize); + format!("{}", a); + } + + // test that trailing commas are acceptable + format!("{}", "test",); + format!("{foo}", foo = "test",); +} + +// Basic test to make sure that we can invoke the `write!` macro with an +// fmt::Write instance. +#[test] +fn test_write() { + let mut buf = String::new(); + write!(&mut buf, "{}", 3); + { + let w = &mut buf; + write!(w, "{foo}", foo = 4); + write!(w, "{}", "hello"); + writeln!(w, "{}", "line"); + writeln!(w, "{foo}", foo = "bar"); + w.write_char('☃'); + w.write_str("str"); + } + + t!(buf, "34helloline\nbar\n☃str"); +} + +// Just make sure that the macros are defined, there's not really a lot that we +// can do with them just yet (to test the output) +#[test] +fn test_print() { + print!("hi"); + print!("{:?}", vec![0u8]); + println!("hello"); + println!("this is a {}", "test"); + println!("{foo}", foo = "bar"); +} + +// Just make sure that the macros are defined, there's not really a lot that we +// can do with them just yet (to test the output) +#[test] +fn test_format_args() { + let mut buf = String::new(); + { + let w = &mut buf; + write!(w, "{}", format_args!("{}", 1)); + write!(w, "{}", format_args!("test")); + write!(w, "{}", format_args!("{test}", test = 3)); + } + let s = buf; + t!(s, "1test3"); + + let s = fmt::format(format_args!("hello {}", "world")); + t!(s, "hello world"); + let s = format!("{}: {}", "args were", format_args!("hello {}", "world")); + t!(s, "args were: hello world"); +} + +#[test] +fn test_order() { + // Make sure format!() arguments are always evaluated in a left-to-right + // ordering + fn foo() -> isize { + static mut FOO: isize = 0; + unsafe { + FOO += 1; + FOO + } + } + assert_eq!( + format!("{} {} {a} {b} {} {c}", foo(), foo(), foo(), a = foo(), b = foo(), c = foo()), + "1 2 4 5 3 6".to_string() + ); +} + +#[test] +fn test_once() { + // Make sure each argument are evaluated only once even though it may be + // formatted multiple times + fn foo() -> isize { + static mut FOO: isize = 0; + unsafe { + FOO += 1; + FOO + } + } + assert_eq!(format!("{0} {0} {0} {a} {a} {a}", foo(), a = foo()), "1 1 1 2 2 2".to_string()); +} + +#[test] +fn test_refcell() { + let refcell = RefCell::new(5); + assert_eq!(format!("{:?}", refcell), "RefCell { value: 5 }"); + let borrow = refcell.borrow_mut(); + assert_eq!(format!("{:?}", refcell), "RefCell { value: }"); + drop(borrow); + assert_eq!(format!("{:?}", refcell), "RefCell { value: 5 }"); +} diff --git a/src/test/ui/ifmt.rs b/src/test/ui/ifmt.rs deleted file mode 100644 index 27ab3d6b7ab..00000000000 --- a/src/test/ui/ifmt.rs +++ /dev/null @@ -1,319 +0,0 @@ -// run-pass - -#![deny(warnings)] -#![allow(unused_must_use)] -#![allow(unused_features)] -#![feature(box_syntax)] - -use std::cell::RefCell; -use std::fmt::{self, Write}; -use std::usize; - -struct A; -struct B; -struct C; -struct D; - -impl fmt::LowerHex for A { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - f.write_str("aloha") - } -} -impl fmt::UpperHex for B { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - f.write_str("adios") - } -} -impl fmt::Display for C { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - f.pad_integral(true, "☃", "123") - } -} -impl fmt::Binary for D { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - f.write_str("aa")?; - f.write_char('☃')?; - f.write_str("bb") - } -} - -macro_rules! t { - ($a:expr, $b:expr) => { assert_eq!($a, $b) } -} - -pub fn main() { - // Various edge cases without formats - t!(format!(""), ""); - t!(format!("hello"), "hello"); - t!(format!("hello {{"), "hello {"); - - // default formatters should work - t!(format!("{}", 1.0f32), "1"); - t!(format!("{}", 1.0f64), "1"); - t!(format!("{}", "a"), "a"); - t!(format!("{}", "a".to_string()), "a"); - t!(format!("{}", false), "false"); - t!(format!("{}", 'a'), "a"); - - // At least exercise all the formats - t!(format!("{}", true), "true"); - t!(format!("{}", '☃'), "☃"); - t!(format!("{}", 10), "10"); - t!(format!("{}", 10_usize), "10"); - t!(format!("{:?}", '☃'), "'☃'"); - t!(format!("{:?}", 10), "10"); - t!(format!("{:?}", 10_usize), "10"); - t!(format!("{:?}", "true"), "\"true\""); - t!(format!("{:?}", "foo\nbar"), "\"foo\\nbar\""); - t!(format!("{:?}", "foo\n\"bar\"\r\n\'baz\'\t\\qux\\"), - r#""foo\n\"bar\"\r\n\'baz\'\t\\qux\\""#); - t!(format!("{:?}", "foo\0bar\x01baz\u{7f}q\u{75}x"), - r#""foo\u{0}bar\u{1}baz\u{7f}qux""#); - t!(format!("{:o}", 10_usize), "12"); - t!(format!("{:x}", 10_usize), "a"); - t!(format!("{:X}", 10_usize), "A"); - t!(format!("{}", "foo"), "foo"); - t!(format!("{}", "foo".to_string()), "foo"); - if cfg!(target_pointer_width = "32") { - t!(format!("{:#p}", 0x1234 as *const isize), "0x00001234"); - t!(format!("{:#p}", 0x1234 as *mut isize), "0x00001234"); - } else { - t!(format!("{:#p}", 0x1234 as *const isize), "0x0000000000001234"); - t!(format!("{:#p}", 0x1234 as *mut isize), "0x0000000000001234"); - } - t!(format!("{:p}", 0x1234 as *const isize), "0x1234"); - t!(format!("{:p}", 0x1234 as *mut isize), "0x1234"); - t!(format!("{:x}", A), "aloha"); - t!(format!("{:X}", B), "adios"); - t!(format!("foo {} ☃☃☃☃☃☃", "bar"), "foo bar ☃☃☃☃☃☃"); - t!(format!("{1} {0}", 0, 1), "1 0"); - t!(format!("{foo} {bar}", foo=0, bar=1), "0 1"); - t!(format!("{foo} {1} {bar} {0}", 0, 1, foo=2, bar=3), "2 1 3 0"); - t!(format!("{} {0}", "a"), "a a"); - t!(format!("{_foo}", _foo = 6usize), "6"); - t!(format!("{foo_bar}", foo_bar=1), "1"); - t!(format!("{}", 5 + 5), "10"); - t!(format!("{:#4}", C), "☃123"); - t!(format!("{:b}", D), "aa☃bb"); - - let a: &dyn fmt::Debug = &1; - t!(format!("{:?}", a), "1"); - - // Formatting strings and their arguments - t!(format!("{}", "a"), "a"); - t!(format!("{:4}", "a"), "a "); - t!(format!("{:4}", "☃"), "☃ "); - t!(format!("{:>4}", "a"), " a"); - t!(format!("{:<4}", "a"), "a "); - t!(format!("{:^5}", "a"), " a "); - t!(format!("{:^5}", "aa"), " aa "); - t!(format!("{:^4}", "a"), " a "); - t!(format!("{:^4}", "aa"), " aa "); - t!(format!("{:.4}", "a"), "a"); - t!(format!("{:4.4}", "a"), "a "); - t!(format!("{:4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); - t!(format!("{:<4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); - t!(format!("{:>4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); - t!(format!("{:^4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); - t!(format!("{:>10.4}", "aaaaaaaaaaaaaaaaaa"), " aaaa"); - t!(format!("{:2.4}", "aaaaa"), "aaaa"); - t!(format!("{:2.4}", "aaaa"), "aaaa"); - t!(format!("{:2.4}", "aaa"), "aaa"); - t!(format!("{:2.4}", "aa"), "aa"); - t!(format!("{:2.4}", "a"), "a "); - t!(format!("{:0>2}", "a"), "0a"); - t!(format!("{:.*}", 4, "aaaaaaaaaaaaaaaaaa"), "aaaa"); - t!(format!("{:.1$}", "aaaaaaaaaaaaaaaaaa", 4), "aaaa"); - t!(format!("{:.a$}", "aaaaaaaaaaaaaaaaaa", a=4), "aaaa"); - t!(format!("{:._a$}", "aaaaaaaaaaaaaaaaaa", _a=4), "aaaa"); - t!(format!("{:1$}", "a", 4), "a "); - t!(format!("{1:0$}", 4, "a"), "a "); - t!(format!("{:a$}", "a", a=4), "a "); - t!(format!("{:-#}", "a"), "a"); - t!(format!("{:+#}", "a"), "a"); - t!(format!("{:/^10.8}", "1234567890"), "/12345678/"); - - // Some float stuff - t!(format!("{:}", 1.0f32), "1"); - t!(format!("{:}", 1.0f64), "1"); - t!(format!("{:.3}", 1.0f64), "1.000"); - t!(format!("{:10.3}", 1.0f64), " 1.000"); - t!(format!("{:+10.3}", 1.0f64), " +1.000"); - t!(format!("{:+10.3}", -1.0f64), " -1.000"); - - t!(format!("{:e}", 1.2345e6f32), "1.2345e6"); - t!(format!("{:e}", 1.2345e6f64), "1.2345e6"); - t!(format!("{:E}", 1.2345e6f64), "1.2345E6"); - t!(format!("{:.3e}", 1.2345e6f64), "1.234e6"); - t!(format!("{:10.3e}", 1.2345e6f64), " 1.234e6"); - t!(format!("{:+10.3e}", 1.2345e6f64), " +1.234e6"); - t!(format!("{:+10.3e}", -1.2345e6f64), " -1.234e6"); - - // Float edge cases - t!(format!("{}", -0.0), "0"); - t!(format!("{:?}", -0.0), "-0.0"); - t!(format!("{:?}", 0.0), "0.0"); - - // sign aware zero padding - t!(format!("{:<3}", 1), "1 "); - t!(format!("{:>3}", 1), " 1"); - t!(format!("{:^3}", 1), " 1 "); - t!(format!("{:03}", 1), "001"); - t!(format!("{:<03}", 1), "001"); - t!(format!("{:>03}", 1), "001"); - t!(format!("{:^03}", 1), "001"); - t!(format!("{:+03}", 1), "+01"); - t!(format!("{:<+03}", 1), "+01"); - t!(format!("{:>+03}", 1), "+01"); - t!(format!("{:^+03}", 1), "+01"); - t!(format!("{:#05x}", 1), "0x001"); - t!(format!("{:<#05x}", 1), "0x001"); - t!(format!("{:>#05x}", 1), "0x001"); - t!(format!("{:^#05x}", 1), "0x001"); - t!(format!("{:05}", 1.2), "001.2"); - t!(format!("{:<05}", 1.2), "001.2"); - t!(format!("{:>05}", 1.2), "001.2"); - t!(format!("{:^05}", 1.2), "001.2"); - t!(format!("{:05}", -1.2), "-01.2"); - t!(format!("{:<05}", -1.2), "-01.2"); - t!(format!("{:>05}", -1.2), "-01.2"); - t!(format!("{:^05}", -1.2), "-01.2"); - t!(format!("{:+05}", 1.2), "+01.2"); - t!(format!("{:<+05}", 1.2), "+01.2"); - t!(format!("{:>+05}", 1.2), "+01.2"); - t!(format!("{:^+05}", 1.2), "+01.2"); - - // Ergonomic format_args! - t!(format!("{0:x} {0:X}", 15), "f F"); - t!(format!("{0:x} {0:X} {}", 15), "f F 15"); - t!(format!("{:x}{0:X}{a:x}{:X}{1:x}{a:X}", 13, 14, a=15), "dDfEeF"); - t!(format!("{a:x} {a:X}", a=15), "f F"); - - // And its edge cases - t!(format!("{a:.0$} {b:.0$} {0:.0$}\n{a:.c$} {b:.c$} {c:.c$}", - 4, a="abcdefg", b="hijklmn", c=3), - "abcd hijk 4\nabc hij 3"); - t!(format!("{a:.*} {0} {:.*}", 4, 3, "efgh", a="abcdef"), "abcd 4 efg"); - t!(format!("{:.a$} {a} {a:#x}", "aaaaaa", a=2), "aa 2 0x2"); - - // Test that pointers don't get truncated. - { - let val = usize::MAX; - let exp = format!("{:#x}", val); - t!(format!("{:p}", val as *const isize), exp); - } - - // Escaping - t!(format!("{{"), "{"); - t!(format!("}}"), "}"); - - test_write(); - test_print(); - test_order(); - test_once(); - - // make sure that format! doesn't move out of local variables - let a: Box<_> = box 3; - format!("{}", a); - format!("{}", a); - - // make sure that format! doesn't cause spurious unused-unsafe warnings when - // it's inside of an outer unsafe block - unsafe { - let a: isize = ::std::mem::transmute(3_usize); - format!("{}", a); - } - - test_format_args(); - - // test that trailing commas are acceptable - format!("{}", "test",); - format!("{foo}", foo="test",); - - test_refcell(); -} - -// Basic test to make sure that we can invoke the `write!` macro with an -// fmt::Write instance. -fn test_write() { - let mut buf = String::new(); - write!(&mut buf, "{}", 3); - { - let w = &mut buf; - write!(w, "{foo}", foo=4); - write!(w, "{}", "hello"); - writeln!(w, "{}", "line"); - writeln!(w, "{foo}", foo="bar"); - w.write_char('☃'); - w.write_str("str"); - } - - t!(buf, "34helloline\nbar\n☃str"); -} - -// Just make sure that the macros are defined, there's not really a lot that we -// can do with them just yet (to test the output) -fn test_print() { - print!("hi"); - print!("{:?}", vec![0u8]); - println!("hello"); - println!("this is a {}", "test"); - println!("{foo}", foo="bar"); -} - -// Just make sure that the macros are defined, there's not really a lot that we -// can do with them just yet (to test the output) -fn test_format_args() { - let mut buf = String::new(); - { - let w = &mut buf; - write!(w, "{}", format_args!("{}", 1)); - write!(w, "{}", format_args!("test")); - write!(w, "{}", format_args!("{test}", test=3)); - } - let s = buf; - t!(s, "1test3"); - - let s = fmt::format(format_args!("hello {}", "world")); - t!(s, "hello world"); - let s = format!("{}: {}", "args were", format_args!("hello {}", "world")); - t!(s, "args were: hello world"); -} - -fn test_order() { - // Make sure format!() arguments are always evaluated in a left-to-right - // ordering - fn foo() -> isize { - static mut FOO: isize = 0; - unsafe { - FOO += 1; - FOO - } - } - assert_eq!(format!("{} {} {a} {b} {} {c}", - foo(), foo(), foo(), a=foo(), b=foo(), c=foo()), - "1 2 4 5 3 6".to_string()); -} - -fn test_once() { - // Make sure each argument are evaluated only once even though it may be - // formatted multiple times - fn foo() -> isize { - static mut FOO: isize = 0; - unsafe { - FOO += 1; - FOO - } - } - assert_eq!(format!("{0} {0} {0} {a} {a} {a}", foo(), a=foo()), - "1 1 1 2 2 2".to_string()); -} - -fn test_refcell() { - let refcell = RefCell::new(5); - assert_eq!(format!("{:?}", refcell), "RefCell { value: 5 }"); - let borrow = refcell.borrow_mut(); - assert_eq!(format!("{:?}", refcell), "RefCell { value: }"); - drop(borrow); - assert_eq!(format!("{:?}", refcell), "RefCell { value: 5 }"); -} -- 2.44.0