Data-Driven Testing

// Test Data Provider
@DataProvider(name = "loginData")
public Object[][] getLoginData() {
    return new Object[][] {
        {"validuser", "validpass", true, "Login successful"},
        {"invaliduser", "validpass", false, "Invalid username"},
        {"validuser", "invalidpass", false, "Invalid password"},
        {"", "validpass", false, "Username required"},
        {"validuser", "", false, "Password required"}
    };
}

// CSV Data Provider
@DataProvider(name = "csvData")
public Object[][] getCSVData() throws IOException {
    List<Object[]> data = new ArrayList<>();
    BufferedReader reader = new BufferedReader(new FileReader("src/test/resources/testdata/login_data.csv"));
    String line;
    while ((line = reader.readLine()) != null) {
        String[] values = line.split(",");
        data.add(new Object[]{values[0], values[1], Boolean.parseBoolean(values[2]), values[3]});
    }
    reader.close();
    return data.toArray(new Object[0][]);
}

// Excel Data Provider
@DataProvider(name = "excelData")
public Object[][] getExcelData() throws IOException {
    FileInputStream fis = new FileInputStream("src/test/resources/testdata/test_data.xlsx");
    XSSFWorkbook workbook = new XSSFWorkbook(fis);
    XSSFSheet sheet = workbook.getSheet("LoginData");
    
    int rowCount = sheet.getLastRowNum();
    int colCount = sheet.getRow(0).getLastCellNum();
    
    Object[][] data = new Object[rowCount][colCount];
    
    for (int i = 1; i <= rowCount; i++) {
        XSSFRow row = sheet.getRow(i);
        for (int j = 0; j < colCount; j++) {
            data[i-1][j] = row.getCell(j).getStringCellValue();
        }
    }
    
    workbook.close();
    fis.close();
    return data;
}

// Test with Data Provider
@Test(dataProvider = "loginData")
public void testLoginWithData(String username, String password, boolean expectedResult, String expectedMessage) {
    LoginPage loginPage = new LoginPage(driver);
    loginPage.enterUsername(username);
    loginPage.enterPassword(password);
    loginPage.clickLoginButton();
    
    if (expectedResult) {
        DashboardPage dashboardPage = new DashboardPage(driver);
        Assert.assertTrue(dashboardPage.getWelcomeMessage().contains("Welcome"));
    } else {
        Assert.assertTrue(loginPage.isErrorMessageDisplayed());
        Assert.assertEquals(loginPage.getErrorMessage(), expectedMessage);
    }
}

// JSON Data Provider
@DataProvider(name = "jsonData")
public Object[][] getJSONData() throws IOException {
    ObjectMapper mapper = new ObjectMapper();
    JsonNode jsonNode = mapper.readTree(new File("src/test/resources/testdata/test_data.json"));
    
    List<Object[]> data = new ArrayList<>();
    for (JsonNode node : jsonNode) {
        data.add(new Object[]{
            node.get("username").asText(),
            node.get("password").asText(),
            node.get("expectedResult").asBoolean(),
            node.get("expectedMessage").asText()
        });
    }
    
    return data.toArray(new Object[0][]);
}