Current File : //usr/local/share/zsh/5.8/help/test
test [ arg ... ]
[ [ arg ... ] ]
Like the system version of test. Added for compatibility; use
conditional expressions instead (see the section `Conditional
Expressions'). The main differences between the conditional
expression syntax and the test and [ builtins are: these commands
are not handled syntactically, so for example an empty variable
expansion may cause an argument to be omitted; syntax errors cause
status 2 to be returned instead of a shell error; and arithmetic
operators expect integer arguments rather than arithmetic
expressions.
The command attempts to implement POSIX and its extensions where
these are specified. Unfortunately there are intrinsic
ambiguities in the syntax; in particular there is no distinction
between test operators and strings that resemble them. The
standard attempts to resolve these for small numbers of arguments
(up to four); for five or more arguments compatibility cannot be
relied on. Users are urged wherever possible to use the `[[' test
syntax which does not have these ambiguities.
Mini Shell