local -r expected_file=$1
local -r actual_file=$2
+ if [[ ! -e $expected_file ]]; then
+ echo "ERROR: expected file \`$expected_file\` doesn't exist" >&2
+ return 1
+ fi
+
+ if [[ ! -e $actual_file ]]; then
+ echo "ERROR: actual file \`$actual_file\` doesn't exist" >&2
+ return 1
+ fi
+
diff -u <(bt_remove_cr_inline "$expected_file") <(bt_remove_cr_inline "$actual_file") 1>&2
}