{"id":22744,"date":"2014-03-14T07:00:52","date_gmt":"2014-03-14T05:00:52","guid":{"rendered":"http:\/\/www.javacodegeeks.com\/?p=22744"},"modified":"2014-03-16T23:56:57","modified_gmt":"2014-03-16T21:56:57","slug":"parameterized-junit-tests","status":"publish","type":"post","link":"https:\/\/www.javacodegeeks.com\/2014\/03\/parameterized-junit-tests.html","title":{"rendered":"Parameterized JUnit tests"},"content":{"rendered":"

Sometimes you encounter a problem that just screams for using “parameterized” tests rather than copy\/pasting the same method many times. \u00a0 The test method is basically the same and the only thing that changes is the data passed in. \u00a0In this case, consider creating a test case that utilitizes the ” Parameterized<\/a>” class from JUnit.<\/p>\n

I recently ran into a problem where our validation of an email address did not allow unicode characters. \u00a0The fix was fairly straight-forward, change the regular expression to allow those characters. \u00a0Next, it was time to test the change. \u00a0Rather than copy\/paste separate methods for each set of data, I decided to learn about the Parameterized method. \u00a0 Below is the result. \u00a0The data includes the expected result and the email address to be validated.<\/p>\n

JUnit test class<\/h2>\n
package com.mycompany.client;\r\n \r\nimport static org.junit.Assert.*;\r\n \r\nimport java.util.Arrays;\r\n \r\nimport org.junit.Test;\r\nimport org.junit.runner.RunWith;\r\nimport org.junit.runners.Parameterized;\r\nimport org.junit.runners.Parameterized.Parameters;\r\n \r\nimport com.mycompany.test.TestServiceUtil;\r\n \r\n\/**\r\n * Parameterized test case for validating email addresses against a regular expression.\r\n * We need to allow unicode characters in the userid portion of the email address, so \r\n * these test cases where created to help validate the validateEmailAddress method\r\n * in the FieldValidationController class.\r\n * \r\n * @author mmiller\r\n *\r\n *\/\r\n@RunWith(Parameterized.class)\r\npublic class TestFieldValiationController {\r\n \r\n    @Parameters(name = \"{index}: {1} is valid email address = {0}\")\r\n    public static Iterable<Object> data() {\r\n        return Arrays.asList(new Object[][] { \r\n         { true, \"john@mycomp.com\" },           { true,  \"john123@mycomp.com\" },\r\n         { true, \"j+._%20_-brown@mycomp.com\" }, { true,  \"123@mycomp.com\" },\r\n         { false, \"john brown@mycomp.com\" },    { false, \"123@mycomp\" },\r\n         { false, \"john^brown@mycomp.com\" },    { true , \"1john@mycomp.com\" },\r\n         { false, \"john#brown@mycomp.com\" },    { false, \"john!brown@mycomp.com\" },\r\n         { false, \"john()brown@mycomp.com\" },   { false, \"john=brown@mycomp.com\" },\r\n         { true,  \"joh\u00f1.brown@mycomp.com\" },    { false, \"john.brown@mycomp.co\u00f1\" },\r\n         { true,  \"joh\u00fa@mycomp.com\" },          { true,  \"joh\u00ed\u00e1\u00f3@mycomp.com\" }\r\n        });\r\n    }\r\n   \r\n    private boolean expected;\r\n    private String emailAddress;\r\n \r\n    public TestFieldValiationController(boolean expected, String emailAddress) {\r\n        this.expected = expected;\r\n        this.emailAddress = emailAddress;\r\n        TestServiceUtil.getInstance();\r\n    }\r\n \r\n    @Test\r\n    public void validateEmail() {\r\n        assertEquals(expected, FieldValidationController.getInstance().validateEmailAddress(emailAddress));\r\n    }\r\n}<\/pre>\n
Hope this helps!<\/b>
\n 
 
<\/div> <\/div><\/p>\n
Reference: <\/i><\/b>Parameterized JUnit tests<\/a> from our JCG partner<\/a> Mike Miller at the Scratching my programming itch<\/a> blog.<\/div>\n","protected":false},"excerpt":{"rendered":"
Sometimes you encounter a problem that just screams for using “parameterized” tests rather than copy\/pasting the same method many times. \u00a0 The test method is basically the same and the only thing that changes is the data passed in. \u00a0In this case, consider creating a test case that utilitizes the ” Parameterized” class from JUnit. …<\/p>\n","protected":false},"author":434,"featured_media":176,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[274,273],"class_list":["post-22744","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-enterprise-java","tag-junit","tag-testing"],"yoast_head":"\nParameterized JUnit tests<\/title>\n<meta name=\"description\" content=\"Sometimes you encounter a problem that just screams for using "parameterized" tests rather than copy\/pasting the same method many times. \u00a0 The test method\" \/>\n<meta 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