100-increment-decrement: Add failing test for backward first number

When point is before the first number, that number should be incremented
or decremented. This doesn't work correctly with more complex, real
world commands.

1 files changed, 6 insertions, 0 deletions

diff --git a/t/100-increment-decrement.t b/t/100-increment-decrement.t
index 78feb1f..883a9c2 100644
--- a/t/100-increment-decrement.t
+++ b/t/100-increment-decrement.t
@@ -104,6 +104,12 @@ is(
 );
 
 is(
+	incdec::incdec("sed -n '39,54p' Alice\'s\ Adventures\ in\ Wonderland.txt ", 1, 3, 1),
+	"sed -n '40,54p' Alice\'s\ Adventures\ in\ Wonderland.txt ",
+	'increments the first integer with point at position 3 backward'
+);
+
+is(
 	incdec::incdec('test -1 ', 1, 7, 1),
 	'test 0 ',
 	'increments the negative integer with point at position 7 backward'