git/t/chainlint/token-pasting.test
Eric Sunshine 56066523ed t/chainlint: add more chainlint.pl self-tests
During the development of chainlint.pl, numerous new self-tests were
created to verify correct functioning beyond the checks already
represented by the existing self-tests. The new checks fall into several
categories:

* behavior of the lexical analyzer for complex cases, such as line
  splicing, token pasting, entering and exiting string contexts inside
  and outside of test script bodies; for instance:

    test_expect_success 'title' '
      x=$(echo "something" |
        sed -e '\''s/\\/\\\\/g'\'' -e '\''s/[[/.*^$]/\\&/g'\''
    '

* behavior of the parser for all compound grammatical constructs, such
  as `if...fi`, `case...esac`, `while...done`, `{...}`, etc., and for
  other legal shell grammatical constructs not covered by existing
  chainlint.sed self-tests, as well as complex cases, such as:

    OUT=$( ((large_git 1>&3) | :) 3>&1 ) &&

* detection of problems, such as &&-chain breakage, from top-level to
  any depth since the existing self-tests do not cover any top-level
  context and only cover subshells one level deep due to limitations of
  chainlint.sed

* address blind spots in chainlint.sed (such as not detecting a broken
  &&-chain on a one-line for-loop in a subshell[1]) which chainlint.pl
  correctly detects

* real-world cases which tripped up chainlint.pl during its development

[1]: https://lore.kernel.org/git/dce35a47012fecc6edc11c68e91dbb485c5bc36f.1661663880.git.gitgitgadget@gmail.com/

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-09-01 10:07:41 -07:00

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# LINT: single token; composite of multiple strings
git config filter.rot13.smudge ./rot13.sh &&
git config filter.rot13.clean ./rot13.sh &&
{
echo "*.t filter=rot13"
echo "*.i ident"
} >.gitattributes &&
{
echo a b c d e f g h i j k l m
echo n o p q r s t u v w x y z
# LINT: exit/enter string context and escaped-quote outside of string
echo '\''$Id$'\''
} >test &&
cat test >test.t &&
cat test >test.o &&
cat test >test.i &&
git add test test.t test.i &&
rm -f test test.t test.i &&
git checkout -- test test.t test.i &&
echo "content-test2" >test2.o &&
# LINT: exit/enter string context and escaped-quote outside of string
echo "content-test3 - filename with special characters" >"test3 '\''sq'\'',\$x=.o"
# LINT: single token; composite of multiple strings
downstream_url_for_sed=$(
printf "%s\n" "$downstream_url" |
# LINT: exit/enter string context; "&" inside string not command terminator
sed -e '\''s/\\/\\\\/g'\'' -e '\''s/[[/.*^$]/\\&/g'\''
)