test suite: Output UTF-8 from cmd.exe on Windows

Author: petrochenkov

src/liblibc/lib.rs

@@ -1827,6 +1827,7 @@ pub mod types {
                 pub type HINSTANCE = HANDLE;
                 pub type HMODULE = HINSTANCE;
 
+                pub type UINT = c_uint;
                 pub type LONG = c_long;
                 pub type PLONG = *mut c_long;
 
@@ -6170,7 +6171,7 @@ pub mod funcs {
 
         pub mod kernel32 {
             use types::os::arch::c95::{c_uint};
-            use types::os::arch::extra::{BOOL, DWORD, SIZE_T, HMODULE,
+            use types::os::arch::extra::{BOOL, UINT, DWORD, SIZE_T, HMODULE,
                                                LPCWSTR, LPWSTR,
                                                LPWCH, LPDWORD, LPVOID,
                                                LPCVOID, LPOVERLAPPED,
@@ -6355,6 +6356,7 @@ pub mod funcs {
                                            lpNumberOfBytesTransferred: LPDWORD,
                                            bWait: BOOL) -> BOOL;
                 pub fn DisconnectNamedPipe(hNamedPipe: HANDLE) -> BOOL;
+                pub fn SetConsoleOutputCP(wCodePageID: UINT) -> BOOL;
             }
         }
 

src/libtest/lib.rs

@@ -681,6 +681,17 @@ pub fn run_tests_console(opts: &TestOpts, tests: Vec<TestDescAndFn> ) -> io::Res
         }
     }
 
+    #[cfg(windows)]
+    fn setup_utf8_console() {
+        // Tests on Windows use cmd.exe commands like `set` or `cd`,
+        // their output should be encoded in UTF-8 (issue #25268)
+        unsafe { libc::SetConsoleOutputCP(65001); }
+    }
+    #[cfg(not(windows))]
+    fn setup_utf8_console() {
+    }
+
+    setup_utf8_console();
     let mut st = try!(ConsoleTestState::new(opts, None::<io::Stdout>));
     fn len_if_padded(t: &TestDescAndFn) -> usize {
         match t.testfn.padding() {