Learn test-driven and behavior-driven development techniques that will give you greater confidence when building React applications Key FeaturesExplore the TDD process, how it works, and why it will help you write maintainable React appsDevelop a component testing framework from scratch, which will help you understand the mechanics of good unit testingReduce complexity by using unit tests and end-to-end acceptance tests to drive the design of your appsBook Description Test-driven development (TDD) is a programming workflow that helps you build your apps by specifying behavior as automated tests. The TDD workflow future-proofs apps so that they can be modified without fear of breaking existing functionality. Another benefit of TDD is that it helps software development teams communicate their intentions more clearly, by way of test specifications. This book teaches you how to apply TDD when building React apps. You'll create a sample app using the same React libraries and tools that professional React developers use, such as Jest, React Router, Redux, Relay (GraphQL), Cucumber, and Puppeteer. The TDD workflow is supported by various testing techniques and patterns, which are useful even if you're not following the TDD process. This book covers these techniques by walking you through the creation of a component test framework. You'll learn automated testing theory which will help you work with any of the test libraries that are in standard usage today, such as React Testing Library. This second edition has been revised with a stronger focus on concise code examples and has been fully updated for React 18. By the end of this TDD book, you'll be able to use React, Redux, and GraphQL to develop robust web apps. What you will learnBuild test-driven applications using React 18 and JestUnderstand techniques and patterns for writing great automated testsUse test doubles and mocks effectivelyTest-drive browser APIs, including the Fetch API and the WebSocket APIIntegrate with libraries such as React Router, Redux, and Relay (GraphQL)Use Cucumber.js and Puppeteer to build Behaviour- Driven Development (BDD) style tests for your applicationsBuild and test async Redux code using redux-saga and expect-reduxWho this book is for This book is for frontend developers who are looking to improve their testing practices and increase the quality and maintainability of their applications. To make the most of this book, you'll need knowledge of the JavaScript programming language.

Coherent introduction to techniques also offers a guide to the mathematical, numerical, and simulation tools of systems analysis. Includes formulation of models, analysis, and interpretation of results. 1995 edition.

Reworking Culture: Relatedness, Rites, and Resources in Garo Hills, North-East India provides intimate insights into the lives of Garo hill farmers, and the challenges they face in day-to-day life. Focusing on the ongoing reinterpretation of traditions, or customs, the book reveals the inadequacy of the all too often assumed characterization of upland societies as culturally homogenous, internally cohesive, and unchanging. Based on extensive ethnographic fieldwork, the book focuses on a rural area where land constitutes the most important resource, and where a substantial number of people practise traditional Garo animism. The book explores how people create and continually reinterpret the multiple relationships that connect them as a community, to the spirits, and to the land. These relationships are embedded in normative frameworks that call for compliance, yet leave room for ambiguity and negotiation. Far from being immutable, these need to be constantly expressed, (re-)interpreted, and enacted. The book thus shows how Garo traditions, referred to as niam, are continuously revised and reworked in response to new economic and political opportunities, as well as to changes in the ontological landscape.

During the 20th century, lake research has become an internationally recognised field of scientific activity, improving our understanding on physical, chemical and biological processes, on fresh water ecology, and water resources among others. The interdisciplinary approaches mainly developed in historical research, as performed by archaeologists and earth scientists, to reconstruct the environmental and climate history of the continents, of human settlements and culture, and to evaluate human impact on the local and global environments. The Geological Society of Switzerland publishes in this volume a selected number of contributions presented during a scientific conference on "Lake Systems from Ice Age to Industrial Time" at Yverdon from 17 to 20 October 2001.

In scenes reminiscent of the apartheid era, 2021 saw South Africa's streets filled with mass protests. While the country is lauded for its peaceful transition to democracy with citizenship for all, those previously disenfranchised, particularly women, remain outraged by their continued poverty and marginalization. As one black woman protester told a reporter, reflecting on the end of apartheid: "We didn't get freedom. We only got democracy." What obligations do states have to support their citizens? What meaning does citizenship itself hold? Blending archival and ethnographic methods, Brady G'sell tracks how historic resistance to racial and gendered marginalization in South Africa animate present-day contentions that regardless of voting rights, without jobs to support their families, the poor majority remain excluded from the nation. Through long-term fieldwork with impoverished black African, Indian, and coloured (mixed race) women living in the city of Durban, she reveals women's everyday efforts to rework political institutions that exclude them. Informed by her interlocutors, G'sell retheorizes citizenship as not solely tied to individual rights, but dependent on the security of social (often kinship) relations. She forwards the concept of relational citizenship as a means to reimagine political belonging amidst a world of declining wage labor and eroding state-citizen covenants.