Introduction

Effective data management is key in test automation. This module covers TypeScript data structures such as arrays, objects, tuples, and enums, which enhance test data organization and maintainability.

Lesson 1: Arrays in TypeScript – Managing Test Case Lists Efficiently

Concept:
Arrays allow storing multiple test cases, results, or input values in a structured manner.

Key Topics:

  • Array Creation: Declaring and initializing typed arrays.
  • Array Methods: Using .map(), .filter(), and .forEach() in test scripts.
  • Multi-Dimensional Arrays: Organizing test data efficiently.

Example:

let testCases: string[] = ["Login", "Signup", "Checkout"];
testCases.push("Password Reset"); // Adding a test case
console.log(testCases);

Pro Tip: Use readonly arrays for test data that should not be modified.

Lesson 2: Objects in TypeScript – Defining Structured Test Configurations

Concept:
Objects allow defining structured data models for storing test configurations.

Key Topics:

  • Defining Objects: Creating key-value pairs for test metadata.
  • Interfaces and Type Aliases: Structuring reusable object definitions.
  • Nested Objects: Organizing complex test configurations.

Example:

type TestConfig = {
    testName: string;
    retries: number;
    isParallel: boolean;
};

let config: TestConfig = { testName: "Login Test", retries: 2, isParallel: true };

Pro Tip: Use interfaces for consistency when defining test configurations.

Lesson 3: Array Methods and Object Properties – Efficient Data Handling

Concept:
Using built-in array and object methods simplifies data processing in test automation.

Key Topics:

  • Array Methods: filter(), map(), and reduce().
  • Object Methods: Object.keys(), Object.values(), Object.assign().
  • Iterating Over Data: Using loops to process large test datasets.

Example:

let results = [
    { test: "Login", status: "Passed" },
    { test: "Signup", status: "Failed" }
];
let passedTests = results.filter(r => r.status === "Passed");
console.log(passedTests);

Pro Tip: Use map() to transform test results into report-ready formats.

Lesson 4: Working with Tuples and Enums for Test Data Representation

Concept:
Tuples and enums provide additional structure to test automation data.

Key Topics:

  • Tuples: Fixed-length arrays with different data types.
  • Enums: Defining a set of named constants for test statuses.
  • Use Cases: Representing test results, priorities, and categories.

Example:

type TestResult = [string, boolean];
let loginTest: TestResult = ["Login Test", true];

enum Status {
    Passed = "Passed",
    Failed = "Failed",
    Skipped = "Skipped"
}
console.log(Status.Passed);

Pro Tip: Use enums for defining test result statuses to ensure consistency.

Conclusion

This module explored TypeScript data structures that help in organizing and managing test data efficiently.

Key Takeaways:

  • Arrays store collections of test cases and results.
  • Objects provide structured data storage with defined properties.
  • Built-in array and object methods optimize data processing.
  • Tuples and enums enforce structure and clarity in test data representation.

What’s Next?
In the next module, we will dive into Functions and Modules – Writing Reusable and Modular TypeScript QA Code, where we will explore function creation, modularization, and npm integration for optimized test automation.

Visit us at Testamplify | X | Instagram | LinkedIn

Image description