; basic functionality
; RUN: FileCheck %s --input-file %s --check-prefix=CHECK1
foo

bar
CHECK1: foo
CHECK1-EMPTY:
CHECK1-NEXT: bar

; next line must be blank
; RUN: %ProtectFileCheckOutput \
; RUN: not FileCheck %s --input-file %s --check-prefix=CHECK2A 2>&1 \
; RUN: | FileCheck %s --check-prefix=CHECK2B
badger
CHECK2A: badger
CHECK2A-EMPTY:
CHECK2B: CHECK2A-EMPTY: is not on the line after the previous match

; CHECK-EMPTY must have empty pattern
; RUN: %ProtectFileCheckOutput \
; RUN: not FileCheck %s --input-file %s --check-prefix=CHECK3A 2>&1 \
; RUN: | FileCheck %s --check-prefix=CHECK3B
CHECK3A: foo
CHECK3A-EMPTY: this is not empty
CHECK3B: found non-empty check string for empty check with prefix 'CHECK3A:'

; CHECK-EMPTY cannot be the first check
; RUN: %ProtectFileCheckOutput \
; RUN: not FileCheck %s --input-file %s --check-prefix=CHECK4A 2>&1 \
; RUN: | FileCheck %s --check-prefix=CHECK4B
CHECK4A-EMPTY:
CHECK4B: found 'CHECK4A-EMPTY' without previous 'CHECK4A: line

; CHECK-EMPTY-NOT and CHECK-NOT-EMPTY rejected
; RUN: %ProtectFileCheckOutput \
; RUN: not FileCheck %s --input-file %s --check-prefixes=CHECK5A 2>&1 \
; RUN: | FileCheck %s --check-prefix=CHECK5C
; RUN: %ProtectFileCheckOutput \
; RUN: not FileCheck %s --input-file %s --check-prefixes=CHECK5B 2>&1 \
; RUN: | FileCheck %s --check-prefix=CHECK5C
CHECK5A-EMPTY-NOT:
CHECK5B-NOT-EMPTY:
CHECK5C: unsupported -NOT combo on prefix 'CHECK5{{A|B}}'

; whitespace does not count as empty
; RUN: %ProtectFileCheckOutput \
; RUN: not FileCheck %s --input-file %s --check-prefix=CHECK6A --match-full-lines \
; RUN: 2>&1 | FileCheck %s --check-prefix=CHECK6B
CHECK6A: the next line has spaces
CHECK6A-EMPTY:
CHECK6B: expected string not found in input

; ***don't add any further blank lines after this point***
; CHECK-EMPTY, like CHECK-NEXT, will report an error if the first matching
; line is not the line immediately following the previous check.
the next line has spaces