1#!/bin/bash
2
3[ -f testing.sh ] && . testing.sh
4
5#testing "name" "command" "result" "infile" "stdin"
6
7BIGTEST="one\ntwo\nthree\nfour\nfive\nsix\nseven\neight\nnine\nten\neleven\n"
8echo -ne "$BIGTEST" > file1
9testing "tail" "tail && echo yes" "oneyes\n" "" "one"
10testing "file" "tail file1" \
11	"two\nthree\nfour\nfive\nsix\nseven\neight\nnine\nten\neleven\n" "" ""
12testing "-n in bounds" "tail -n 3 file1" "nine\nten\neleven\n" "" ""
13testing "-n out of bounds" "tail -n 999 file1" "$BIGTEST" "" ""
14testing "-n+ in bounds" "tail -n +3 file1" \
15	"three\nfour\nfive\nsix\nseven\neight\nnine\nten\neleven\n" "" ""
16testing "-n+ outof bounds" "tail -n +999 file1" "" "" ""
17testing "-c in bounds" "tail -c 27 file1" \
18	"even\neight\nnine\nten\neleven\n" "" ""
19testing "-c out of bounds" "tail -c 999 file1" "$BIGTEST" "" ""
20testing "-c+ in bounds" "tail -c +27 file1" \
21	"x\nseven\neight\nnine\nten\neleven\n" "" ""
22testing "-c+ out of bonds" "tail -c +999 file1" "" "" ""
23testing "-N" "tail -1 file1" "eleven\n" "" ""
24rm file1
25
26testing "stdin no trailing newline" "tail -n 1 - " "c" "" "a\nb\nc"
27testing "file no trailing newline" "tail -n 1 input" "c" "a\nb\nc" ""
28
29optional TAIL_SEEK
30testing "noseek -n in bounds" "tail -n 3" "nine\nten\neleven\n" \
31	"" "$BIGTEST"
32testing "noseek -n out of bounds" "tail -n 999" "$BIGTEST" "" "$BIGTEST"
33testing "noseek -n+ in bounds" "tail -n +3" \
34	"three\nfour\nfive\nsix\nseven\neight\nnine\nten\neleven\n" "" \
35	"$BIGTEST"
36testing "noseek -n+ outof bounds" "tail -n +999" "" "" "$BIGTEST"
37testing "noseek -c in bounds" "tail -c 27" \
38	"even\neight\nnine\nten\neleven\n" "" "$BIGTEST"
39testing "noseek -c out of bounds" "tail -c 999" "$BIGTEST" "" "$BIGTEST"
40testing "noseek -c+ in bounds" "tail -c +27" \
41	"x\nseven\neight\nnine\nten\neleven\n" "" "$BIGTEST"
42testing "noseek -c+ out of bonds" "tail -c +999" "" "" "$BIGTEST"
43
44makebigfile()
45{
46
47  for j in $(seq 1 100)
48  do
49    printf "%s " $j
50    for i in $(seq 1 100)
51    do
52      printf %s 123456789abcefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
53    done
54    echo
55  done
56}
57makebigfile > bigfile
58
59testing "-c 12345 -n 3 bigfile" "tail -c 12345 -n 3 bigfile | md5sum" \
60  "347bbdcbad8a313f4dc7bd558c5bfcb8  -\n" "" ""
61testing "-n 3 -c 12345 bigfile" "tail -n 3 -c 12345 bigfile | md5sum" \
62  "1698825a750288284ec3ba7d8a59f302  -\n" "" ""
63rm bigfile
64
65echo 111 > one
66testing "-f one" \
67  'tail -f one & sleep .25 ; echo two >> one; sleep .25; echo three >> one; sleep .25; kill $! >/dev/null' \
68  "111\ntwo\nthree\n" "" ""
69rm one
70
71echo uno > one
72echo dos > two
73echo tres > three
74testing "-f one two three" \
75  'tail -f one two three & sleep .25 ; echo more >> three ; echo also >> one; sleep .25; kill $! >/dev/null' \
76  "==> one <==\nuno\n\n==> two <==\ndos\n\n==> three <==\ntres\nmore\n\n==> one <==\nalso\n" "" ""
77rm one two three
78