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string_list: add a function string_list_longest_prefix()

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Add a function that finds the longest string from a string_list that
is a prefix of a given string.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michael Haggerty
2012-09-12 16:04:46 +02:00
committed by Junio C Hamano
parent 31d5451eed
commit f103f95b11
5 changed files with 86 additions and 0 deletions
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30
t/t0063-string-list.sh
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@ -17,6 +17,14 @@ test_split () {
"
}
test_longest_prefix () {
test "$(test-string-list longest_prefix "$1" "$2")" = "$3"
}
test_no_longest_prefix () {
test_must_fail test-string-list longest_prefix "$1" "$2"
}
test_split "foo:bar:baz" ":" "-1" <<EOF
3
[0]: "foo"
@ -88,4 +96,26 @@ test_expect_success "test remove_duplicates" '
test a:b:c = "$(test-string-list remove_duplicates a:a:a:b:b:b:c:c:c)"
'
test_expect_success "test longest_prefix" '
test_no_longest_prefix - '' &&
test_no_longest_prefix - x &&
test_longest_prefix "" x "" &&
test_longest_prefix x x x &&
test_longest_prefix "" foo "" &&
test_longest_prefix : foo "" &&
test_longest_prefix f foo f &&
test_longest_prefix foo foobar foo &&
test_longest_prefix foo foo foo &&
test_no_longest_prefix bar foo &&
test_no_longest_prefix bar:bar foo &&
test_no_longest_prefix foobar foo &&
test_longest_prefix foo:bar foo foo &&
test_longest_prefix foo:bar bar bar &&
test_longest_prefix foo::bar foo foo &&
test_longest_prefix foo:foobar foo foo &&
test_longest_prefix foobar:foo foo foo &&
test_longest_prefix foo: bar "" &&
test_longest_prefix :foo bar ""
'
test_done