TESTickle

A unit testing library for C. Output is in the Test Anything Protocol format.

Installation

Windows

Download and install Strawberry Perl; this comes with gcc and gmake too. You will need to install the required CPAN libraries with: cpan Template

OS X

The recommended route is via Perlbrew.

• curl -L http://install.perlbrew.pl | bash
• perlbrew install-cpanm
• perlbrew install perl-5.22.0
• perlbrew switch perl-5.22.0
• cpanm install Template

Getting Started

Initialising The Project

To start a new project using TESTickle, perform the following commands.

Create a git repository.

git init

Or clone a repository created in GitHub (or similar).

Add TESTickle as a submodule.

git submodule add https://github.com/MarkWithall/TESTickle.git

Commit the addition of TESTickle.

git commit -a -m "Add TESTickle submodule."

Creating A Makefile

By default the submodule will be in the TESTickle folder. The file TESTickle.mk contains make commands for building tests. Import that file into the project Makefile using:

include TESTickle/TESTickle.mk

The extension .test.c is used for test fixtures. To build a test fixture, e.g., foo.test.c add the following line to the Makefile:

foo.test: $(call test_files_for,foo.test.c)
	$(CC) $(CFLAGS) -o $@ $^

And to run the tests, include the following rule:

test:
  prove -f -e "" foo.test

Writing Tests

To create a test fixture, create a file with the extension .test.c and include TESTickle:

include "TESTickle/TESTickle.h"

Adjust the include path or add a -I switch to the CFLAGS variable in the Makefile as necessary.

It is necessary to implement the setup and teardown functions, even if they are empty.

void setup() { }
void teardown() { }

To write a test, use the header and footer macros as follows:

TEST(my_first_test)
END_TEST

Assertions are then used to assert things in the test:

TEST(one_plus_one_equals_two)
    int result = 1 + 1;
    ASSERT_EQUAL(result, 2, "%d", "1 + 1 = 2");
END_TEST

Assertions

There are several built-in assertions in TESTickle.

ASSERT_TRUE

ASSERT_TRUE(test, message)

This takes an expression that returns a boolean-equivalent type and a failure message string.

For example:

ASSERT_TRUE(2 > 1, "2 should be greater than 1");

ASSERT_FALSE

ASSERT_FALSE(test, message)

Similarly to ASSERT_TRUE, this takes an expression that returns a boolean-equivalent type and a failure message string.

For example:

ASSERT_FALSE(2 == 1, "2 should not be equal to 1");

ASSERT_EQUAL

ASSERT_EQUAL(actual, expected, type, message)

Assert that two values are equal by ==.

For example:

ASSERT_EQUAL(1, 1, "1 should be equal to 1");

ASSERT_NOT_EQUAL

ASSERT_NOT_EQUAL(actual, expected, message)

Assert that two values are not equal by !=.

For example:

ASSERT_NOT_EQUAL(2, 1, "2 should not be equal to 1");

ASSERT_STRING_EQUAL

ASSERT_STRING_EQUAL(actual, expected, message)

Assert that two null-terminated character arrays are equal by strncmp; with a maximum length of MESSAGE_LENGTH (default 128).

For example:

ASSERT_STRING_EQUAL("Hello", "Hello", "'Hello' should be equal to 'Hello'");

ASSERT_STRING_EMPTY

ASSERT_STRING_EMPTY(actual, message)

Assert that a null-terminated character array is empty.

For example:

ASSERT_STRING_EMPTY("", "String should be empty");

ASSERT_STRING_NOT_EMPTY

ASSERT_STRING_NOT_EMPTY(actual, message)

Assert that a null-terminated character array is not empty.

For example:

ASSERT_STRING_NOT_EMPTY("foo", "String should not be empty");

ASSERT_NULL

ASSERT_NULL(expr, message)

Assert that a pointer is null.

For example:

ASSERT_NULL(ptr, "Pointer should be null");

ASSERT_NOT_NULL

ASSERT_NOT_NULL(expr, message)

Assert that a point is not null.

For example:

ASSERT_NOT_NULL(ptr, "Pointer should no be null");