zsh/Test/B01cd.ztst

# This file serves as a model for how to write tests, so is more heavily
# commented than the others.  All tests are run in the Test subdirectory
# of the distribution, which must be writable.  They should end with
# the suffix `.ztst': this is not required by the test harness itself,
# but it is needed by the Makefile to run all the tests.

# Blank lines with no other special meaning (e.g. separating chunks of
# code) and all those with a `#' in the first column are ignored.

# All section names start with a % in the first column.  The names
# must be in the expected order, though not all sections are required.
# The sections are %prep (preparatory setup:  code executed should return
# status 0, but no other tests are performed), %test (the main tests), and
# %clean (to cleanup: the code is simply unconditionally executed).
#
# Literal shell code to be evaluated must be indented with any number
# of spaces and/or tabs, to differentiate it from tags with a special
# meaning to the test harness.  Note that this is true even in sections
# where there are no such tags.  Also note that file descriptor 9
# is reserved for input from the test script, and file descriptor 8
# preserves the original stdout.  Option settings are preserved between the
# execution of different code chunks; initially, all standard zsh options
# (the effect of `emulate -R zsh') are set.

%prep
# This optional section prepares the test, creating directories and files
# and so on.  Chunks of code are separated by blank lines (which is not
# necessary before the end of the section); each chunk of code is evaluated
# in one go and must return status 0, or the preparation is deemed to have
# failed and the test ends with an appropriate error message.  Standard
# output from this section is redirected to /dev/null, but standard error
# is not redirected.
#
# Tests should use subdirectories ending in `.tmp'.  These will be
# removed with all the contents even if the test is aborted.
 mkdir cdtst.tmp cdtst.tmp/real cdtst.tmp/sub

 ln -s ../real cdtst.tmp/sub/fake

 setopt chaselinks
 cd .
 unsetopt chaselinks
 mydir=$PWD

%test
# This is where the tests are run.  It consists of blocks separated
# by blank lines.  Each block has the same format and there may be any
# number of them.  It consists of indented code, plus optional sets of lines
# beginning '<', '>' and '?' which may appear in any order.  These correspond
# to stdin (fed to the code), stdout (compared with code output) and
# stderr (compared with code error output) respectively.  These subblocks
# may occur in any order, but the natural one is: code, stdin, stdout,
# stderr.
#
# The rules for '<', '>' and '?' lines are the same: only the first
# character is stripped (with the excpetion for '*' noted below), with
# subsequent whitespace being significant; lines are not subject to any
# substitution unless the `q' flag (see below) is set.
#
# Each line of a '>' and '?' chunk may be preceded by a '*', so the line
# starts '*>' or '*?'.  This signifies that for any line with '*' in front
# the actual output should be pattern matched against the corresponding
# lines in the test output.  Each line following '>' or '?' must be a
# valid pattern, so characters special to patterns such as parentheses
# must be quoted with a backslash.  The EXTENDED_GLOB option is used for
# all such patterns.
#
# Each chunk of indented code is to be evaluated in one go and is to
# be followed by a line starting (in the first column) with
# the expected status returned by the code when run, or - if it is
# irrelevant.  An optional set of single-letter flags follows the status
# or -.  The following are understood:
#  . d   Don't diff stdout against the expected stdout.
#   D   Don't diff stderr against the expected stderr.
#   q   All redirection lines given in the test script (not the lines
#       actually produced by the test) are subject to ordinary quoted shell
#       expansion (i.e. not globbing).
# This can be followed by a `:' and a message describing the
# test, which will be printed if the test fails, along with a
# description of the failure that occurred.  The `:' and message are
# optional, but highly recommended.
# Hence a complete status line looks something like:
#  0dDq:Checking whether the world will end with a bang or a whimper
#
# If either or both of the '>' and '?' sets of lines is absent, it is
# assumed the corresponding output should be empty and it is an error if it
# is not.  If '<' is empty, stdin is an empty (but opened) file.
#
# It is also possible to add lines in the redirection section beginning
# with `F:'.  The remaining text on all such lines will be concatenated
# (with newlines in between) and displayed in the event of an error.
# This text is useful for explaining certain frequent errors, for example
# ones which may arise from the environment rather than from the shell
# itself.  (The example below isn't particularly useful as errors with
# `cd' are unusual.)
#
# A couple of features aren't used in this file, but are usefuil in cases
# where features may not be available so should not be tested.  They boh
# take the form of variables.  Note that to keep the test framework simple
# there is no magic in setting the variables: the chunk of code being
# executed needs to avoid executing any test code by appropriate structure
# (typically "if").  In both cases, the value of the variable is output
# as a warning that the test was skipped.
# ZTST_unimplemented: Set this in the %prep phase if the entire test file
#   is to be skipped.
# ZTST_skip: Set this in any test case if that single test case is to be
#   skipped.  Testing resumes at the next test case in the same file.
 cd cdtst.tmp/sub/fake &&
 pwd &&
 print $PWD
0q:Preserving symbolic links in the current directory string
>$mydir/cdtst.tmp/sub/fake
>$mydir/cdtst.tmp/sub/fake
F:This test shouldn't really fail.  The fact that it has indicates
F:something is broken.  But you already knew that.

 cd ../../.. &&
 pwd &&
 print $PWD
0q:Changing directory up through symbolic links without following them
>$mydir
>$mydir

 setopt chaselinks
 cd cdtst.tmp/sub/fake &&
 pwd &&
 print $PWD
0q:Resolving symbolic links with chaselinks set
>$mydir/cdtst.tmp/real
>$mydir/cdtst.tmp/real

 ln -s nonexistent link_to_nonexistent
 pwd1=$(pwd -P)
 cd -s link_to_nonexistent
 pwd2=$(pwd -P)
 [[ $pwd1 = $pwd2 ]] || print "Ooops, changed to directory '$pwd2'"
0:
?(eval):cd:3: not a directory: link_to_nonexistent

%clean
# This optional section cleans up after the test, if necessary,
# e.g. killing processes etc.  This is in addition to the removal of *.tmp
# subdirectories.  This is essentially like %prep, except that status
# return values are ignored.