Java Unit Test

1, first create a new Java engineering--testjunit. Open the Properties page of the project Testjunit, select the Java Build Path sub-option, click the "Add Library ..." button, select JUnit in the pop-up Add Library dialog box, and select version 4 on the next page. Click "Finish" button after 1.

2, add a new directory under the project Testjunit root testsrc, and put it into the project source code directory, to store the test code, so that it is separated from the source code.

3. Write Unit Test Cases:

Package com.meritit; Import static Org.junit.Assert.AssertNull; Import static org.junit.Assert.AssertEquals; import org.junit.Test; Public class Testworddealutil { Test the WORDFORMAT4DB general handling situation @Test public void Wordformat4dbnormal () { String target = "EmployeeInfo"; String result = Worddealutil. wordformat4db (target); assertequals ("Employee_info", result); } Handling when testing for NULL @Test public void Wordformat4dbnull () { String target = null; String result = Worddealutil. wordformat4db (target); Assertnull (result); } Processing when testing an empty string @Test public void Wordformat4dbempty () { String target = ""; String result = Worddealutil. wordformat4db (target); assertequals ("", result); } To test the case when the first letter is capitalized @Test public void Wordformat4dbegin () { String target = "EmployeeInfo"; String result = Worddealutil. wordformat4db (target); assertequals ("Employee_info", result); } To test the case when the tail letter is capitalized @Test public void Wordformat4dbend () { String target = "Employeeinfoa"; String result = Worddealutil. wordformat4db (target); assertequals ("employee_info_a", result); } When you test multiple connected letters in uppercase @Test public void Wordformat4dbtogether () { String target = "Employeeainfo"; String result = Worddealutil. wordformat4db (target); assertequals ("Employee_a_info", result); } }

4, according to the requirements of the code written as follows:

Package com.meritit; import Java.util.regex.Matcher; import Java.util.regex.Pattern; /** * Format the contents of a string format such as name, address, etc. * @author lvxg */ Public class Worddealutil { /** * Java object names (capitalize the first letter of each word) according to the * Database naming habits are formatted * Formatted data is lowercase and uses an underscore to split a named word * * Example: EmployeeInfo becomes employee_info after formatting * * @param name Java object names */ Public Static String wordformat4db (string name) { Pattern p = pattern. Compile ("[A-z]"); Matcher m = p.matcher (name); StringBuffer sb = new stringbuffer (); while (M.find ()) { M.appendreplacement (SB, "_" +m.group ()); } return m.appendtail (SB). ToString (). toLowerCase (); } }

5, run the test, the result:

The JUnit runtime interface has two test cases not passed.

Java Unit Test