Data-driven is a test automation framework which stores test data in a table or spread spreadsheet format. This allows automation engineers to have a single test script which can execute tests for all the test data in the table.
In this framework, input values are read from data files and are stored into a variable in test scripts. Ddt (Data Driven testing) enables building both positive and negative test cases into a single test.
In Data-driven test automation framework, input data can be stored in single or multiple data sources like xls, XML, csv, and databases.
In this tutorial, you will learn
Frequently we have multiple data sets which we need to run the same tests on. To create an individual test for each data set is a lengthy and time-consuming process.
Data Driven Testing framework resolves this problem by keeping the data searate from Functional tests. The same test script can execute for different combinations of input test data and generate test results.
Example:
For example, we want to test the login system with multiple input fields with 1000 different data sets.
To test this, you can take following different approaches:
Approach 1) Create 1000 scripts one for each dataset and runs each test separately one by one.
Approach 2) Manually change the value in the test script and run it several times.
Approach 3) Import the data from the excel sheet. Fetch test data from excel rows one by one and execute the script.
In the given three scenarios first two are laborious and time-consuming. Therefore, it is ideal to follow the third approach.
Thus, the third approach is nothing but a Data-Driven framework.
Consider you want to Test Login functionality of an application.
Step 1) Identify the Test Cases
Step 2) Create detailed est Steps for above 3 Test Cases
| Test Case# | Description | Test Steps | Test Data | Expected Results |
|---|---|---|---|---|
| 1 | Check Login for valid credentials |
|
Username: valid password: valid | Login Success |
| 2 | Check Login for invalid credentials |
|
Username: invalid password: valid | Login Fail |
| 3 | Check Login for invalid credentials |
|
Username: valid password: invalid | Login Fail |
Step 3) Create Test Script
If you observe the Test Steps Remain common through the 3 Test Steps. You need to create a Test Script to execute these steps
// This is Pseudo Code
// Test Step 1: Launch Application
driver.get("URL of the Appliation");
// Test Step 2: Enter Password
txtbox_username.sendKeys("valid");
// Test Step 3: Enter Password
txtbox_password.sendKeys("invalid");
// Test Step 4: Check Results
If (Next Screen) print success else Fail
Step 4) Create an excel/csv with the Input Test Data
Step 5) Step Modify the Scrip to Loop over Input Test Data. The input commands should also be parameterized
// This is Pseudo Code
// Loop 3 Times
for (i = 0; i & lt; = 3; i++) {
// Read data from Excel and store into variables
int input_1 = ReadExcel(i, 0);
int input_2 = ReadExcel(i, 1);
// Test Step 1: Launch Application
driver.get("URL of the Application");
// Test Step 2: Enter Password
txtbox_username.sendKeys(input_1);
// Test Step 3: Enter Password
txtbox_password.sendKeys(input_2);
// Test Step 4: Check Results
If(Next Screen) print success
else Fail
}
Above are just 3 test cases. The test script can be used to loop over following test cases just by appending test data values to Excel
And so on
Below given are Best testing practices for Data-Driven testing:
Data-Driven offer many advantages some of them are:
Some Drawbacks of Data Driven Automation Testing method are:
What is Data Driven Testing? Learn to create Framework
原文：https://www.cnblogs.com/a00ium/p/10392497.html