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git/t/t9011-svn-da.sh
SZEDER Gábor 1c5e94f459 tests: use 'test_must_be_empty' instead of 'test_cmp <empty> <out>' 
Using 'test_must_be_empty' is shorter and more idiomatic than

  >empty &&
  test_cmp empty out

as it saves the creation of an empty file.  Furthermore, sometimes the
expected empty file doesn't have such a descriptive name like 'empty',
and its creation is far away from the place where it's finally used
for comparison (e.g. in 't7600-merge.sh', where two expected empty
files are created in the 'setup' test, but are used only about 500
lines later).

These cases were found by instrumenting 'test_cmp' to error out the
test script when it's used to compare empty files, and then converted
manually.

Note that even after this patch there still remain a lot of cases
where we use 'test_cmp' to check empty files:

  - Sometimes the expected output is not hard-coded in the test, but
    'test_cmp' is used to ensure that two similar git commands produce
    the same output, and that output happens to be empty, e.g. the
    test 'submodule update --merge  - ignores --merge  for new
    submodules' in 't7406-submodule-update.sh'.

  - Repetitive common tasks, including preparing the expected results
    and running 'test_cmp', are often extracted into a helper
    function, and some of this helper's callsites expect no output.

  - For the same reason as above, the whole 'test_expect_success'
    block is within a helper function, e.g. in 't3070-wildmatch.sh'.

  - Or 'test_cmp' is invoked in a loop, e.g. the test 'cvs update
    (-p)' in 't9400-git-cvsserver-server.sh'.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-21 11:48:36 -07:00

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#!/bin/sh
test_description='test parsing of svndiff0 files
Using the "test-svn-fe -d" helper, check that svn-fe correctly
interprets deltas using various facilities (some from the spec,
some only learned from practice).
'
. ./test-lib.sh
>empty
printf foo >preimage
test_expect_success 'reject empty delta' '
test_must_fail test-svn-fe -d preimage empty 0
'
test_expect_success 'delta can empty file' '
printf "SVNQ" | q_to_nul >clear.delta &&
test-svn-fe -d preimage clear.delta 4 >actual &&
test_must_be_empty actual
'
test_expect_success 'reject svndiff2' '
printf "SVN\002" >bad.filetype &&
test_must_fail test-svn-fe -d preimage bad.filetype 4
'
test_expect_success 'one-window empty delta' '
printf "SVNQ%s" "QQQQQ" | q_to_nul >clear.onewindow &&
test-svn-fe -d preimage clear.onewindow 9 >actual &&
test_must_be_empty actual
'
test_expect_success 'reject incomplete window header' '
printf "SVNQ%s" "QQQQQ" | q_to_nul >clear.onewindow &&
printf "SVNQ%s" "QQ" | q_to_nul >clear.partialwindow &&
test_must_fail test-svn-fe -d preimage clear.onewindow 6 &&
test_must_fail test-svn-fe -d preimage clear.partialwindow 6
'
test_expect_success 'reject declared delta longer than actual delta' '
printf "SVNQ%s" "QQQQQ" | q_to_nul >clear.onewindow &&
printf "SVNQ%s" "QQ" | q_to_nul >clear.partialwindow &&
test_must_fail test-svn-fe -d preimage clear.onewindow 14 &&
test_must_fail test-svn-fe -d preimage clear.partialwindow 9
'
test_expect_success 'two-window empty delta' '
printf "SVNQ%s%s" "QQQQQ" "QQQQQ" | q_to_nul >clear.twowindow &&
test-svn-fe -d preimage clear.twowindow 14 >actual &&
test_must_fail test-svn-fe -d preimage clear.twowindow 13 &&
test_must_be_empty actual
'
test_expect_success 'noisy zeroes' '
printf "SVNQ%s" \
"RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRQQQQQ" |
tr R "\200" |
q_to_nul >clear.noisy &&
len=$(wc -c <clear.noisy) &&
test-svn-fe -d preimage clear.noisy $len &&
test_must_be_empty actual
'
test_expect_success 'reject variable-length int in magic' '
printf "SVNRQ" | tr R "\200" | q_to_nul >clear.badmagic &&
test_must_fail test-svn-fe -d preimage clear.badmagic 5
'
test_expect_success 'reject truncated integer' '
printf "SVNQ%s%s" "QQQQQ" "QQQQRRQ" |
tr R "\200" |
q_to_nul >clear.fullint &&
printf "SVNQ%s%s" "QQQQQ" "QQQQRR" |
tr RT "\201" |
q_to_nul >clear.partialint &&
test_must_fail test-svn-fe -d preimage clear.fullint 15 &&
test-svn-fe -d preimage clear.fullint 16 &&
test_must_fail test-svn-fe -d preimage clear.partialint 15
'
test_expect_success 'nonempty (but unused) preimage view' '
printf "SVNQ%b" "Q\003QQQ" | q_to_nul >clear.readpreimage &&
test-svn-fe -d preimage clear.readpreimage 9 >actual &&
test_must_be_empty actual
'
test_expect_success 'preimage view: right endpoint cannot backtrack' '
printf "SVNQ%b%b" "Q\003QQQ" "Q\002QQQ" |
q_to_nul >clear.backtrack &&
test_must_fail test-svn-fe -d preimage clear.backtrack 14
'
test_expect_success 'preimage view: left endpoint can advance' '
printf "SVNQ%b%b" "Q\003QQQ" "\001\002QQQ" |
q_to_nul >clear.preshrink &&
printf "SVNQ%b%b" "Q\003QQQ" "\001\001QQQ" |
q_to_nul >clear.shrinkbacktrack &&
test-svn-fe -d preimage clear.preshrink 14 >actual &&
test_must_fail test-svn-fe -d preimage clear.shrinkbacktrack 14 &&
test_must_be_empty actual
'
test_expect_success 'preimage view: offsets compared by value' '
printf "SVNQ%b%b" "\001\001QQQ" "\0200Q\003QQQ" |
q_to_nul >clear.noisybacktrack &&
printf "SVNQ%b%b" "\001\001QQQ" "\0200\001\002QQQ" |
q_to_nul >clear.noisyadvance &&
test_must_fail test-svn-fe -d preimage clear.noisybacktrack 15 &&
test-svn-fe -d preimage clear.noisyadvance 15 &&
test_must_be_empty actual
'
test_expect_success 'preimage view: reject truncated preimage' '
printf "SVNQ%b" "\010QQQQ" | q_to_nul >clear.lateemptyread &&
printf "SVNQ%b" "\010\001QQQ" | q_to_nul >clear.latenonemptyread &&
printf "SVNQ%b" "\001\010QQQ" | q_to_nul >clear.longread &&
test_must_fail test-svn-fe -d preimage clear.lateemptyread 9 &&
test_must_fail test-svn-fe -d preimage clear.latenonemptyread 9 &&
test_must_fail test-svn-fe -d preimage clear.longread 9
'
test_expect_success 'forbid unconsumed inline data' '
printf "SVNQ%b%s%b%s" "QQQQ\003" "bar" "QQQQ\001" "x" |
q_to_nul >inline.clear &&
test_must_fail test-svn-fe -d preimage inline.clear 18 >actual
'
test_expect_success 'reject truncated inline data' '
printf "SVNQ%b%s" "QQQQ\003" "b" | q_to_nul >inline.trunc &&
test_must_fail test-svn-fe -d preimage inline.trunc 10
'
test_expect_success 'reject truncated inline data (after instruction section)' '
printf "SVNQ%b%b%s" "QQ\001\001\003" "\0201" "b" | q_to_nul >insn.trunc &&
test_must_fail test-svn-fe -d preimage insn.trunc 11
'
test_expect_success 'copyfrom_data' '
echo hi >expect &&
printf "SVNQ%b%b%b" "QQ\003\001\003" "\0203" "hi\n" | q_to_nul >copydat &&
test-svn-fe -d preimage copydat 13 >actual &&
test_cmp expect actual
'
test_expect_success 'multiple copyfrom_data' '
echo hi >expect &&
printf "SVNQ%b%b%b%b%b" "QQ\003\002\003" "\0201\0202" "hi\n" \
"QQQ\002Q" "\0200Q" | q_to_nul >copy.multi &&
len=$(wc -c <copy.multi) &&
test-svn-fe -d preimage copy.multi $len >actual &&
test_cmp expect actual
'
test_expect_success 'incomplete multiple insn' '
printf "SVNQ%b%b%b" "QQ\003\002\003" "\0203\0200" "hi\n" |
q_to_nul >copy.partial &&
len=$(wc -c <copy.partial) &&
test_must_fail test-svn-fe -d preimage copy.partial $len
'
test_expect_success 'catch attempt to copy missing data' '
printf "SVNQ%b%b%s%b%s" "QQ\002\002\001" "\0201\0201" "X" \
"QQQQ\002" "YZ" |
q_to_nul >copy.incomplete &&
len=$(wc -c <copy.incomplete) &&
test_must_fail test-svn-fe -d preimage copy.incomplete $len
'
test_expect_success 'copyfrom target to repeat data' '
printf foofoo >expect &&
printf "SVNQ%b%b%s" "QQ\006\004\003" "\0203\0100\003Q" "foo" |
q_to_nul >copytarget.repeat &&
len=$(wc -c <copytarget.repeat) &&
test-svn-fe -d preimage copytarget.repeat $len >actual &&
test_cmp expect actual
'
test_expect_success 'copyfrom target out of order' '
printf foooof >expect &&
printf "SVNQ%b%b%s" \
"QQ\006\007\003" "\0203\0101\002\0101\001\0101Q" "foo" |
q_to_nul >copytarget.reverse &&
len=$(wc -c <copytarget.reverse) &&
test-svn-fe -d preimage copytarget.reverse $len >actual &&
test_cmp expect actual
'
test_expect_success 'catch copyfrom future' '
printf "SVNQ%b%b%s" "QQ\004\004\003" "\0202\0101\002\0201" "XYZ" |
q_to_nul >copytarget.infuture &&
len=$(wc -c <copytarget.infuture) &&
test_must_fail test-svn-fe -d preimage copytarget.infuture $len
'
test_expect_success 'copy to sustain' '
printf XYXYXYXYXYXZ >expect &&
printf "SVNQ%b%b%s" "QQ\014\004\003" "\0202\0111Q\0201" "XYZ" |
q_to_nul >copytarget.sustain &&
len=$(wc -c <copytarget.sustain) &&
test-svn-fe -d preimage copytarget.sustain $len >actual &&
test_cmp expect actual
'
test_expect_success 'catch copy that overflows' '
printf "SVNQ%b%b%s" "QQ\003\003\001" "\0201\0177Q" X |
q_to_nul >copytarget.overflow &&
len=$(wc -c <copytarget.overflow) &&
test_must_fail test-svn-fe -d preimage copytarget.overflow $len
'
test_expect_success 'copyfrom source' '
printf foo >expect &&
printf "SVNQ%b%b" "Q\003\003\002Q" "\003Q" | q_to_nul >copysource.all &&
test-svn-fe -d preimage copysource.all 11 >actual &&
test_cmp expect actual
'
test_expect_success 'copy backwards' '
printf oof >expect &&
printf "SVNQ%b%b" "Q\003\003\006Q" "\001\002\001\001\001Q" |
q_to_nul >copysource.rev &&
test-svn-fe -d preimage copysource.rev 15 >actual &&
test_cmp expect actual
'
test_expect_success 'offsets are relative to window' '
printf fo >expect &&
printf "SVNQ%b%b%b%b" "Q\003\001\002Q" "\001Q" \
"\002\001\001\002Q" "\001Q" |
q_to_nul >copysource.two &&
test-svn-fe -d preimage copysource.two 18 >actual &&
test_cmp expect actual
'
test_expect_success 'example from notes/svndiff' '
printf aaaaccccdddddddd >expect &&
printf aaaabbbbcccc >source &&
printf "SVNQ%b%b%s" "Q\014\020\007\001" \
"\004Q\004\010\0201\0107\010" d |
q_to_nul >delta.example &&
len=$(wc -c <delta.example) &&
test-svn-fe -d source delta.example $len >actual &&
test_cmp expect actual
'
test_done
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