[test][llvm-objcopy] Test llvm-objcopy with standard streams

[abrachet]

Summary

Ensure that redirecting input to stdin is no different than a normal file. Likewise outputting to stdout should be no different than outputting to a file.

[alexander-shaposhnikov]

llvm/test/tools/llvm-objcopy/ELF/standard-streams.test

3 ↗

(On Diff #202743)

cmp ? and the same below
(for consistency)
(if I'm not mistaken all the existing tests use cmp to verify that two binary files are identical)

[abrachet]

Now using cmp rather than diff

[abrachet]

Put test case in ELF/ directory

[jakehehrlich]

Neat! I didn't even know this was possible TBH

llvm/test/tools/llvm-objcopy/ELF/standard-streams.test

1 ↗

(On Diff #202866)

Instead of using cat you can just redirect the file in.

[abrachet]

Directed a file in instead of piping cat

[jhenderson]

LGTM, with one nit.

llvm/test/tools/llvm-objcopy/ELF/standard-streams.test

7 ↗

(On Diff #202867)

Delete this blank line. There should be a single trailing new line character at the end of the last line in the file with content, but nothing after that.

llvm/test/tools/llvm-objcopy/standard-streams.test

+# RUN: cat %p/Inputs/alloc-symtab.o | llvm-objcopy - %t
+# RUN: llvm-objcopy %p/Inputs/alloc-symtab.o %t1
+# RUN: cmp %t %t1
+
+# RUN: llvm-objcopy %p/Inputs/alloc-symtab.o - > %t2
+# RUN: cmp %t1 %t2
+