Test NG Parameterized Test
TestNG allows you to create parameterized tests by using the @Parameters annotation. Parameterized tests are useful when you want to run the same test method multiple times with different sets of data. Here’s how you can create parameterized tests in TestNG:
Step 1: Define Test Data
First, define the test data you want to use for your parameterized tests. This could be in the form of arrays, lists, or any other data structure that suits your needs.
public Object[][] testData() {
return new Object[][] {
{"data1", 1},
{"data2", 2},
{"data3", 3}
};
}
In this example, we have a @DataProvider method called testdata that provides an array of arrays, where each inner array represents a set of test data.
Step 2: Use the @Test Annotation with @Parameters
Next, annotate your test method with @Test and use the @Parameters annotation to specify the names of the parameters your test method expects. These parameter names should match the data provider’s names.
public void parameterizedTest(String data, int value) {
// Your test logic here, using the 'data' and 'value' parameters
System.out.println("Data: " + data);
System.out.println("Value: " + value);
}
In this example, the parameterizedTest method expects two parameters: data (a string) and value (an integer). These parameters correspond to the data provided by the @DataProvider.
Step 3: Run the Parameterized Test
Now, when you run your TestNG suite, TestNG will execute the parameterizedTest method multiple times, once for each set of data provided by the data provider.
Step 4: Configure Your TestNG XML File
Ensure that your TestNG XML file includes the <suite> and <test> elements, specifies the classes containing the parameterized tests, and sets the data provider class.
<suite name="ParameterizedTestSuite">
<test name="ParameterizedTest">
<classes>
<class name="com.example.ParameterizedTestExample"/>
</classes>
</test>
</suite>
In this XML file, replace com.example.ParameterizedTestExample with the actual package and class name containing your parameterized tests.
Step 5: Run the TestNG Suite
Run your TestNG suite using your preferred build tool or TestNG runner. The parameterized tests will execute with the different sets of data provided by the data provider.
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