Conditional Statements in JavaScript for QA Testing: Key Scenarios Every Tester Should Know

// Check if both username and password are not empty
    if (userName !== "" && userPassword !== "") {
        // If both fields are filled, login is successful
        console.log("Login successful with User ID " + userName);
        
    } 
    else 
        {
        // If any field is empty, login fails
        console.log("Invalid Username and Password");
    }

// Check if the API response status indicates success (200 or 201)
    if (response.status === 200 || response.status === 201) {
        // If success, log PASS message and show response data
        console.log("API Status PASS : Successful Response " + response.status);
        console.log("Response body ", response.data);
        
    } 
    else 
        {
        // If not success, log FAIL message
        console.log("API Status FAIL");
    }

// Check if the product is in stock
    if (productStock > 0) {
        // If stock is available, show Add to Cart button and product info
        console.log("Add to Cart button should be visible. Stock is :", productStock);
        console.log("Product info is", productInfo);
        /*
        Output:
        Add to Cart button should be visible. Stock is : 20
        Product info is { id: 'sku-1234', name: 'Laptop' }
        */
    } else {
        // If no stock, hide Add to Cart button
        console.log("Add to Cart should not be visible");
    }

if (formData.zipCode && /^\d{5}$/.test(formData.zipCode)) {
      console.log("Form Validation: PASS. ZIP code is valid for USA.");
    } else {
      console.log("Form Validation: FAIL. ZIP code is missing or invalid for USA.");
    }
  } else {
    // For countries other than USA, ZIP code is not required
    console.log("Form Validation: PASS. ZIP not required for", formData.country);
  }

 // Check if the user's role is "QA Analyst"
    if (userData.userRole === "QA Analyst") {
        // If true, grant access and display user details
        console.log("System access granted to the user ", userData.userName);
        console.log("User details are :", userData);
    } else {
        // If false, deny access
        console.log("User cannot access the system");
    }

// Expected navigation depending on payment outcome
  if (paymentStatus === "success") {
    console.log("PASS: Payment success -> redirect to Order Confirmation page.");
  } else if (paymentStatus === "pending") {
    console.log("INFO: Payment pending -> show pending payment page or status.");
  } else {
    // For all other statuses treat as failure and send to Payment Failed page
    console.log("FAIL: Payment failed -> redirect to Payment Failed page.");
  }

 // Conditional device expectations
  if (deviceType === "mobile") 
  {
    console.log("Device Check PASS: On mobile -> expect hamburger menu and stacked layout.");
  } else if (deviceType === "tablet") 
  {
    console.log("Device Check PASS: On tablet -> expect medium layout and touch-friendly controls.");
  } else 
  {
    console.log("Device Check PASS: On desktop -> expect full-width menu and multi-column layout.");
  }

  // Step 1: Initialize retry parameters
  let attempt = 0;             // Current attempt counter
  const maxRetries = 3;        // Maximum number of retry attempts
  let elementFound = false;    // Flag to track if element is found
  // Step 2: Try to find the element until maxRetries or until found
  while (attempt < maxRetries && !elementFound) {
    attempt++; // Increment attempt counter
    // Step 3: Simulate finding the element
    // We'll pretend the element appears on the 2nd attempt
    elementFound = (attempt >= 2);
    // Step 4: Log result of this attempt
    if (elementFound) {
      console.log("Retry Logic: PASS - element found on attempt", attempt);
    } else {
      console.log("Retry Logic: WARNING - element not found on attempt", attempt, ". Retrying...");
      // In real automation, you might refresh the page, wait, or re-locate the element here
    }
  }
  // Step 5: Final check if element was never found
  if (!elementFound) {
    console.log("Retry Logic: FAIL - element not found after", maxRetries, "attempts.");
  }