| # RUN: echo foo > %t.foo | |
| # RUN: echo bar > %t.bar | |
| # Check output pipe. | |
| # RUN: diff %t.foo %t.foo | FileCheck -allow-empty -check-prefix=EMPTY %s | |
| # RUN: diff -u %t.foo %t.bar | FileCheck %s && false || true | |
| # Fail so lit will print output. | |
| # RUN: false | |
| # CHECK: @@ | |
| # CHECK-NEXT: -foo | |
| # CHECK-NEXT: +bar | |
| # EMPTY-NOT: {{.}} |