Awesome

tsht

A tiny shell-script based TAP-compliant testing framework

• Installation
  • Per project
  • Per machine
• Usage
  • Specs
  • CLI
  • Extensions
  • Hooks
  • Example
  • Vim integration
  • Pretty Output
• API - core
  • plan
  • fail
  • pass
  • exec_fail
  • exec_ok
  • ok
  • not_ok
  • use
• API - file
  • file_exists
  • not_file_exists
  • not_file_empty
  • equals_file
  • equals_file_file
• API - string
  • equals
  • not_equals
  • match
  • not_match
• API - jq
  • jq_ok
  • jq_ok
• API - diff
  • equals (colordiff)
• API - colordiff
  • equals (colordiff)
• API - shxml

Installation

In general you don't have to install tsht, simply add the wrapper script to your project.

Per project

1. Create a test directory, e.g. test
2. Download the wrapper script cd test && wget 'https://cdn.rawgit.com/kba/tsht/master/tsht'
3. Create your unit tests
4. Execute all tests using ./tsht or specific tests using ./tsht <path/to/unit-test.tsht>...

The first time you execute the wrapper script, it will clone this repository to .tsht and execute the runner. Whenever you want to update the tsht framework, simply delete the .tsht folder and an up-to-date version of the framework will be cloned when you next run your tests.

Per machine

To execute tsht scripts without the runner, you will need to have tsht in your $PATH. You can either set $PATH up manually to include the directory that contains the tsht wrapper or clone this repository and use the Makefile.

To install system-wide:

sudo make install

To install to your home directory:

make PREFIX=$HOME/.local install

Usage

Specs

Tsht unit tests are written in a DSL superset of the Bash shell scripting language. This means that any bash code can be used in a tsht script.

All tsht scripts must end with .tsht.

All tsht scripts should start with #!/usr/bin/env tsht

Tsht scripts are executed in alphabetic order, so prefix the scripts you want to run early with a low number.

CLI

Usage: tsht [options...] [<path/to/unit.tsht>...]
    Options:
        --help     -h   Show this help
        --color         Highlight passing/failing tests in green/red
        --update        Update the tsht framework from git
        --version  -V   Show last revision of the runner

Extensions

In addition to the core functionality, tsht can be extended with extensions. An extension is a subdirectory of tsht that has this structure:

/ext/<name>
ext/
└── <name>
    ├── Makefile
    └── <name>.sh

The Makefile must have an install target that can install necessary binaries into $(PREFIX)/bin.

To use an extension, call the use directive:

use 'jq'

This will call make install in the extension directory and set the PATH variable to let the extension use the locally installed software.

Currently, these extensions are available:

• jq (API, test): A wrapper around the jq CLI JSON query tool
• diff (API, test): Show differences with color-highlighted diff
• diff (API, test): Show differences with diff
• shxml (API, test) Use XML based tools in tests (XSD, XSD, XPATH…)

Hooks

Some unit tests require setup work before they run and teardown work after they run. To make this easier and reusable, these tasks can be grouped in before and after hooks, which are shell scripts or shell functions.

Hooks are always test-specific and are looked for in three places:

• Shell function after
• Shell scripts named like the test with suffix .before/.after
• Shell scripts in the same directory as the test named .before/.after

Note: before cannot be a shell function in the script because the script must be sourced to declare it and once it has been sourced, it's too late to call the before hook.

Example

#!/usr/bin/env tsht

plan 4

equals $(( 84 / 2 )) 42 "three score and six"
exec_ok "ls /"
match "oo" "foobar"
not_ok $(( 0 / 42 ))  "Nothing divided is nothing"

Vim integration

If you are a vim user, try out the tsht.vim plugin which will detect .tsht files, highlight the builtin functions and execute scripts with the closest wrapper.

Pretty Output

There are various TAP consumers that can produce nice output, the tape NodeJS TAP-based framework lists a few.

For example, using the tap-spec TAP reporter can be installed using

npm install -g tap-spec

For the tests of tsht itself, it will produce output like this:

$ ./test/tsht | tap-spec

API - core

This library the core functions of tsht. It is always included and includes the most commonly used libraries:

• string
• file

plan

Specify the number of planned assertions

plan <number-of-tests>

fail

(source, test)

Fail unconditionally

fail <message> [<additional-output>]

The additional output will be prefixed with #.

pass

Succeed unconditionally.

See fail

exec_fail

(source, test)

Execute a command (or function) and succeed when its return code matches the parameter <expected-return>

exec_fail <expected-return> [<cmd-args>...]

Example

exec_fail 2 "ls" "-la" "DOES-NOT-EXIST"

exec_ok

(source, test)

Execute a command (or function) and succeed when it returns zero.

Example

exec_ok "ls" "-la"

ok

Succeed if the first argument is a non-empty non-zero string

not_ok

Succeed if the first argument is an empty string or zero.

use

Use an extension library

use 'jq'

API - file

file_exists

Succeed if a file (or folder or symlink...) exists.

file_exists ".git"

not_file_exists

Succeed if a file (or folder or symlink...) does not exist.

not_file_exists "temp"

not_file_empty

ALIAS: file_not_empty

Succeed if a file exists and is a non-empty file.

equals_file

Succeed if the first arguments match the contents of the file in the second argument.

equals_file_file

Succeed if the contents of two files match, filenames passed as arguments.

API - string

This library contains functions testing strings and numbers

equals

Test for equality of strings

equals <expected> <actual> [<message>]

Example:

equals "2" 2 "two equals two"
equals 2 "$(wc -l my-file)" "two lines in my-file"

not_equals

Inverse of equals.

match

Succeed if a string matches a pattern

match "^\d+$" "1234" "Only numbers"

not_match

Succeed if a string does not match a pattern

not_match "^\d+$" "abcd" "Only numbers"

API - jq

Extension that allows testing JSON strings.

Enable with

use jq

See jq Github repo.

jq_ok

Test if jq expression validates

jq_ok

Test if jq expression is as exepected

API - diff

Extension that replaces the builtin equals with a function that shows the difference as a unified diff

Enable with

use diff

Requires diff(1).

equals (colordiff)

Test for equality of strings and output unified diff on fail.

equals <expected> <actual> [<message>]

Example:

equals "2" 2 "two equals two"
equals 2 "$(wc -l my-file)" "two lines in my-file"

API - colordiff

Extension that replaces the builtin equals with a function that shows the difference in a colored diff output.

Enable with

use colordiff

Requires perl.

See colordiff Github repo.

equals (colordiff)

Test for equality of strings and output colored diff on fail.

equals <expected> <actual> [<message>]

Example:

equals "2" 2 "two equals two"
equals 2 "$(wc -l my-file)" "two lines in my-file"

API - shxml

Extension that makes shxml available

Enable with

use shxml

See shxml Github repo.