test/tools/llvm-strings/stdin.test

## Show that llvm-strings can handle stdin input properly.

## Case 1: output with single string.
RUN: echo -n "abcdefg" | llvm-strings - | FileCheck %s --check-prefix=CASE1 --implicit-check-not={{.}}
CASE1: abcdefg

## Case 2: output too short for string.
RUN: echo -n "abc" | llvm-strings - | FileCheck %s --implicit-check-not={{.}} --allow-empty

## Case 3: output with new line.
RUN: echo -e "abcd\nefgh" | llvm-strings - | FileCheck %s --check-prefix=CASE3 --implicit-check-not={{.}}
CASE3:      abcd
CASE3-NEXT: efgh

## Case 4: output containing unprintable characters.
RUN: echo -e "abcd\x00ef\x1fghij\x7fklmn" | llvm-strings - | FileCheck %s --check-prefix=CASE4 --implicit-check-not={{.}}
CASE4:      abcd
CASE4-NEXT: ghij
CASE4-NEXT: klmn

## Case 5: no file name specified is equivalent to explicitly requesting stdin.
RUN: echo -n "abcdefg" | llvm-strings | FileCheck %s --check-prefix=CASE1 --implicit-check-not={{.}}