This plugin is an implementation of a “Combinatorial Interaction Testing with Constraints” algorithm for the Avocado varianter functionality. It generates an optimal number of variants, which in turn become different test scenarios. To learn more about this algorithm, please take a look to the papers listed below.
To install the Avocado CIT plugin from pip, use:
$ sudo pip install avocado-framework-plugin-varianter-cit
To run the example below, use the test included in the avocado code
$ git clone https://github.com/avocado-framework/avocado.git
Please refer to avocado/examples/varianter_cit/params.cit for an example of a input file.
Input file format
The following is the general structure of a input file:
PARAMETERS Parameter_1 [Value_1, Value_2, Value_3, Value_4] Parameter_2 [Value_1, Value_2, Value_3, Value_4] Parameter_3 [Value_1, Value_2, Value_3, Value_4] CONSTRAINTS Parameter_1 != Value_1 || Parameter_2 != Value_3 Parameter_3 != Value_2 || Parameter_2 != Value_4 || Parameter_1 != Value_4
The input file has two parts, parameters and constraints.
Parameters
Each line represent one parameter.
Each parameter has a name, and a list of values inside brackets.
Constraints:
Constraints have to be in Conjunctive normal form.
Constraints use these tree operands: !=, OR, AND
|| represents operand OR and new line represents operand AND.
In the example, this is the logic formula
((P_1 != V1 OR P_2 != V_3) AND (P_3 != V_2 OR P_2 != V_4 OR P_1 != Value_4))
Usage
Cit varianter plugin runs with two parameters:
--cit-parameter-file with path to the input file
--cit-order-of-combinations with strength of combination (default is 2)
To see the variants generated by this demo implementation, execute:
$ avocado variants --cit-parameter-file avocado/examples/varianter_cit/params.cit CIT Variants (28): Variant red-square-solid-plastic-anodic-6-4-4-2: / Variant green-circle-gas-leather-cathodic-7-5-4-1: / Variant green-triangle-liquid-leather-anodic-5-4-1-3: / Variant green-square-liquid-plastic-anodic-3-1-4-5: / Variant red-triangle-solid-leather-anodic-5-2-4-1: / Variant black-triangle-gas-leather-anodic-7-1-1-2: / Variant green-circle-solid-aluminum-cathodic-7-1-5-4: / Variant red-square-gas-plastic-cathodic-6-3-5-3: / Variant gold-triangle-solid-leather-anodic-6-5-1-4: / Variant gold-triangle-gas-leather-anodic-3-2-5-2: / Variant gold-square-gas-plastic-cathodic-5-1-1-1: / Variant red-circle-gas-plastic-anodic-1-1-3-3: / Variant red-circle-gas-aluminum-cathodic-3-3-1-5: / Variant black-triangle-solid-plastic-cathodic-5-5-5-5: / Variant gold-triangle-gas-leather-anodic-7-4-2-5: / Variant black-triangle-gas-aluminum-cathodic-6-1-2-1: / Variant gold-square-liquid-leather-cathodic-3-5-2-3: / Variant black-square-solid-aluminum-cathodic-7-2-4-3: / Variant black-circle-liquid-aluminum-anodic-1-4-5-1: / Variant black-triangle-gas-leather-cathodic-7-3-3-1: / Variant green-square-solid-aluminum-cathodic-1-3-2-2: / Variant gold-triangle-gas-aluminum-anodic-1-3-4-4: / Variant red-square-liquid-plastic-anodic-7-2-2-4: / Variant gold-circle-liquid-aluminum-anodic-5-5-3-2: / Variant red-triangle-gas-leather-anodic-1-5-1-5: / Variant gold-circle-liquid-aluminum-cathodic-5-3-2-4: / Variant black-square-solid-plastic-cathodic-3-4-3-4: / Variant green-circle-liquid-plastic-cathodic-6-2-3-5: /
You can enable more verbosity, making each variant to show its content:
$ avocado variants --cit-parameter-file avocado/examples/varianter_cit/params.cit -c
CIT Variants (28):
Variant red-circle-solid-plastic-cathodic-6-3-3-1: /
/:coating => cathodic
/:color => red
/:material => plastic
/:p10 => 1
/:p7 => 6
/:p8 => 3
/:p9 => 3
/:shape => circle
/:state => solid
Variant black-circle-liquid-aluminum-anodic-6-5-1-2: /
/:coating => anodic
/:color => black
/:material => aluminum
/:p10 => 2
/:p7 => 6
/:p8 => 5
/:p9 => 1
/:shape => circle
/:state => liquid
... Skip 26 more variants ...
To execute tests with those combinations use:
$ avocado run avocado/examples/tests/passtest.py --cit-parameter-file avocado/examples/varianter_cit/params.cit JOB ID : 6abd9e9f1ff9ed33a353ca8f3ef845cd4cc404a5 JOB LOG : $HOME/avocado/job-results/job-2018-07-23T08.46-6abd9e9/job.log (01/25) passtest.py:PassTest.test;black-circle-gas-plastic-anodic-3-3-5-5: PASS (0.04 s) (02/25) passtest.py:PassTest.test;gold-square-liquid-leather-anodic-3-2-1-4: PASS (0.03 s) (03/25) passtest.py:PassTest.test;green-square-gas-plastic-cathodic-3-5-4-1: PASS (0.04 s) (04/25) passtest.py:PassTest.test;gold-circle-solid-leather-anodic-6-4-4-2: PASS (0.04 s) (05/25) passtest.py:PassTest.test;green-triangle-liquid-aluminum-cathodic-7-4-5-1: PASS (0.04 s) (06/25) passtest.py:PassTest.test;black-circle-gas-plastic-cathodic-1-4-3-4: PASS (0.04 s) (07/25) passtest.py:PassTest.test;red-square-gas-leather-anodic-3-4-2-3: PASS (0.04 s) (08/25) passtest.py:PassTest.test;gold-triangle-solid-leather-anodic-1-3-2-1: PASS (0.04 s) (09/25) passtest.py:PassTest.test;green-circle-gas-plastic-cathodic-7-1-2-4: PASS (0.04 s) (10/25) passtest.py:PassTest.test;green-triangle-gas-aluminum-cathodic-6-2-2-5: PASS (0.04 s) (11/25) passtest.py:PassTest.test;black-circle-liquid-plastic-cathodic-5-5-2-2: PASS (0.03 s) (12/25) passtest.py:PassTest.test;red-square-solid-aluminum-anodic-5-2-3-1: PASS (0.04 s) (13/25) passtest.py:PassTest.test;gold-square-solid-leather-anodic-7-5-3-5: PASS (0.04 s) (14/25) passtest.py:PassTest.test;green-triangle-solid-leather-anodic-1-5-1-3: PASS (0.04 s) (15/25) passtest.py:PassTest.test;black-circle-liquid-leather-cathodic-6-1-1-1: PASS (0.04 s) (16/25) passtest.py:PassTest.test;red-triangle-liquid-plastic-anodic-6-3-3-3: PASS (0.04 s) (17/25) passtest.py:PassTest.test;green-triangle-solid-plastic-cathodic-5-3-4-4: PASS (0.04 s) (18/25) passtest.py:PassTest.test;red-square-liquid-aluminum-anodic-6-5-5-4: PASS (0.04 s) (19/25) passtest.py:PassTest.test;red-square-gas-aluminum-cathodic-7-3-1-2: PASS (0.04 s) (20/25) passtest.py:PassTest.test;red-square-liquid-aluminum-anodic-1-1-4-5: PASS (0.04 s) (21/25) passtest.py:PassTest.test;gold-circle-gas-plastic-anodic-5-4-1-5: PASS (0.04 s) (22/25) passtest.py:PassTest.test;gold-circle-solid-leather-anodic-5-1-5-3: PASS (0.04 s) (23/25) passtest.py:PassTest.test;red-circle-liquid-plastic-cathodic-1-2-5-2: PASS (0.04 s) (24/25) passtest.py:PassTest.test;green-triangle-solid-aluminum-anodic-3-1-3-2: PASS (0.04 s) (25/25) passtest.py:PassTest.test;black-circle-solid-aluminum-cathodic-7-2-4-3: PASS (0.03 s) RESULTS : PASS 25 | ERROR 0 | FAIL 0 | SKIP 0 | WARN 0 | INTERRUPT 0 | CANCEL 0 JOB TIME : 1.21 s JOB HTML : $HOME/avocado/job-results/job-2018-07-23T08.46-6abd9e9/results.html
Publications
The publication by Ahmed, Bestoun S., Kamal Z. Zamli, and Chee Peng Lim, entitled “Application of particle swarm optimization to uniform and variable strength covering array construction”, Applied Soft Computing, 12(4), 2012, pp. 1330-1347, contains the basis for the algorithm and implementation of this feature.
Additionally, the publication by Bestoun S. Ahmed, Amador Pahim, Cleber R. Rosa Junior, D. Richard Kuhn and Miroslav Bures, entitled “Towards an Automated Unified Framework to Run Applications for Combinatorial Interaction Testing”, contain a practical use case of this software.
3 maintainers
Release files for avocado-framework-plugin-varianter-cit 113.0
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