What Is gRPC?
Explains the concepts behind gRPC.
Tag: Kotlin
Build a Simple Standard MCP Server (STDIO) with Spring and Kotlin
Build an MCP Server with Spring and Kotlin, then connect it to Claude.
Kotest Framework
An introduction to Kotlin testing frameworks.
Kotlin Annotations
Kotlin Testing Framework - Kotest
Introduces Kotlin testing frameworks.
Creating Spring REST Docs with Kotlin
Kotlin MockK Usage (Official Documentation Translation)
MockK is a Kotlin mock library for writing test code. This document is an English translation of the Korean page based on the official documentation.
Kotlin external Keyword
Kotlin Generics
Kotlin Overview
Building an Application with the Gemini API
This page explains how to build a simple application using the Gemini API.
Kotlin Development Environment and Installation
MCP Function Calling with the Google Gemini API
Learn how to connect an MCP Server to an LLM (Gemini).
A Quick Look at Kotlin Code
Comparing gRPC Libraries for Spring
Compares the two major libraries for applying gRPC in a Spring environment.
Spring에 net.devh 라이브러리를 활용한 gRPC 구현
커뮤니티/오픈소스(3rd-party) 라이브러리를 활용한 구현 방법에 대해서 알아 본다.
Building a Simple WebMVC MCP Server with Spring and Kotlin
Apply WebMVC to an MCP Server.
Kotest Extensions
This section explains various extension projects available for Kotest.
Understanding Kotlin Generics - Covariance and Invariance
Creating Spring Batch with Kotlin
Build Spring Boot Cache Caffeine with Kotlin
Kotlin reified Keyword
Under the JVM specification, the shape of a generic function is generally lost at runtime, but Kotlin can refer to generic function type information at runtime by using inline and reified.
Kotlin Data Types
Kotlin Primitive Types and Reference Types
Kotlin Variable Declaration
Kotlin Operators
Kotlin Operator Overloading
Kotlin Null Safety
Spring 공식 프로젝트 라이브러리를 활용한 gRPC 구현
Spring 공식 프로젝트(Spring Team이 개발) 라이브러리를 활용한 구현 방법에 대해서 알아 본다.
Adding Authentication to a WebMVC MCP Server with Spring and Kotlin
Apply Spring Security to a WebMVC MCP Server and add authentication.
Kotest Assertions
Explains assertions and matchers in Kotlin.
Kotest - Kotlin Testing Framework
Introduces Kotlin’s testing framework.
Spring Retry
Spring Retry provides a feature that automatically calls a specified method again when an exception occurs while calling a method.
Kotlin expect and actual Keywords
Kotlin Control Statements
Kotlin Delayed Initialization (lateinit, by lazy)
Kotest Property Testing
Explains Property Testing.
MockK
Introduces MockK.
Kotlin Exception Handling (try, catch, finally)
Kotlin Functions
Kotlin First-Class Functions
Kotlin Higher-Order Functions
Kotlin Lambda Expressions
Kotlin Scope Functions | let, with, run, apply, also
Kotlin Infix Functions
Kotlin Inline Functions
Kotest IntelliJ Plugin
Introduces the Kotest IntelliJ Plugin.
Kotlin Classes
Kotlin Visibility Modifiers
Kotlin Abstract Classes
Kotlin Interfaces
Kotlin Data Classes
Kotlin Enum Classes
Kotlin Sealed Classes
Kotlin Delegation
Kotlin Object Keyword
Kotlin Extension Functions
Decomposing Pair and Triple Elements with Kotlin Destructuring Declarations
Kotlin Packages and Imports
Creating and Running Kotlin Threads
Kotlin Coroutines
Kotest Property-based Testing
Kotest property testing defines inputs and expected output, then generates many inputs that should satisfy the property being tested.
Kotest Test Assertions
In tests, assertions are used to check whether specific conditions are true. In Kotlin, Kotest lets you use many kinds of assertions and matchers. This section looks at assertions and matchers in detail.
Kotest External Extensions
Kotest integrates with many other libraries and frameworks. Some are provided by the Kotest team, while others are maintained and hosted by third parties.
Kotest IntelliJ Plugin Introduction
Introduces the Kotest IntelliJ Plugin.
Kotest Overview
An introduction to Kotlin’s testing framework.
Kotlin Collections
Kotlin Overview
Kotlin String Templates
Introduces how to display variables and expressions inside string literals.
Kotest Spring Extension(SpringExtension)
Kotest provides a Spring extension that lets you test code that uses the Spring framework for dependency injection.
Kotest IntelliJ Plugin Test Explorer
Introduces the Test Explorer in the Kotest IntelliJ Plugin.
Kotest Property Test Functions
Kotest has two function variants used to run property tests, forAll and checkAll.
Kotest Project Setup
Kotest is a powerful testing framework written in Kotlin. This page explains how to set up a project.
Kotlin Basics
Building a Spring Boot Web Application with Kotlin
Create a simple Spring Boot web application with Kotlin
Kotest Ktor Extension
This page explains the Ktor extension.
Kotest IntelliJ Plugin Properties
Introduces how to configure properties in the Kotest IntelliJ Plugin.
Kotest Generators
Kotest generators are tools used to support property-based testing.
Writing Basic Kotest Tests
Explains basic Kotest test writing, test execution, and reports.
Kotest Custom Matchers
In Kotest, you can create custom matchers to check specific conditions.
Converting Kotlin Strings to Integers
Introduces how to convert strings to integers and integers to strings.
Kotlin Functions
Kotest System Extensions
Kotest System Extensions provide assertions for system calls related to Java’s java.lang.System class. These extensions are used to test exceptions from system calls and verify behavior such as system output or system exit.
Kotest Generators List
Introduces the full list of Kotlin generators.
Kotest Testing Styles
Kotest provides a variety of testing styles. This page explains the supported testing styles and how to use them.
Kotlin Classes and Objects
Kotest Generator Operations
Introduces Kotest generator operations including Next, Filter, Map, FlatMap, Merging, and Bind.
Kotest Testcontainers Extension
Testcontainers is a tool that lets you use container-based external resources during tests. It helps build a test environment similar to a real environment and makes testing external resources easier. This page explains how to use Testcontainers in Kotest.
Kotest Clues
In Kotest, clues let you provide detailed explanations for assertions.
Kotest Conditional Evaluation
There are several ways to disable tests. You can hard-code it in the test or disable tests conditionally at runtime.
Kotest Exceptions
Explains assertions for testing exceptions in Kotlin.
Kotest Kafka (EmbeddedKafkaListener) Extension
Kotest’s EmbeddedKafkaListener is an extension that lets you use Apache Kafka in embedded form in a test environment.
Kotest Isolation Modes
Isolation Modes control how the test engine creates spec instances for test cases. In other words, they determine how test instances are created for each test case.
Kotlin Functional Programming
Kotest Lifecycle Hooks
When writing effective test code, it is important to manage the lifecycle of each test case. This page explains how to use lifecycle hooks.
Kotest MockServer
MockServer provides a virtual HTTP server. With this library, you can test as if communicating with a real server without using a separate mocking library such as mockk.
Kotest Seeds
When a property test runs, values are generated using a random source created from a seed value.
Kotest Soft Assertions
Soft assertions use assertSoftly to group and execute multiple assertions.
Automatic Spring Dependency Injection with @Primary and @Qualifier
Kotest Configuration
Explains Kotest property testing configuration.
Kotest JUnit XML Format Reporter
Kotest can generate test reports in JUnit XML format. This format can be used in automated test execution environments such as CI/CD tools. JUnit XML reports record test execution results and are used to analyze them and generate statistics and quality metrics for test results.
Kotest Inspectors
In addition to matchers, Kotest supports inspectors, extension functions for collections that verify whether an assertion holds for a particular group of elements.
Kotest Basic Extensions
Kotest Extensions are extension features that provide various capabilities which can be integrated into the test lifecycle of the Kotest test execution framework.
Kotest HTML Reporter
Kotest provides an HTML Reporter that can generate test reports in HTML format. This lets you visually inspect test execution results and provides detailed information about test execution.
Kotest Coroutines
This page explains how to test coroutines in Kotest.
Kotest Assertion Mode
Assertion Mode controls what happens when a test runs without executing any assertions.
Kotlin Strings
Kotest Allure Extension
This page introduces the Allure extension.
Kotest Shrinking
In property-based testing, the first failure case found may contain a lot of complexity that is not actually responsible for making the test fail.
Kotest Core Matchers
Introduces the types of Kotest core matchers.
Kotest Testing Exceptions
This page explains exception testing in Kotest.
Spring Batch
Declaring, Initializing, and Using Key Functions of Kotlin Arrays
Introduces how to declare and initialize arrays.
Kotest Current Instant Listeners Extension
This page introduces the Current Instant Listeners extension.
Kotest Statistics
Sometimes you may want to know what kinds of values Kotest generates to check that a generator is configured as expected.
Kotest Collection Matchers
Introduces rich matchers available for Collection, Iterable, and Array types.
Kotest Data-Driven Testing
For effective testing, creating, managing, and cleaning up test data is important. This section looks at how to manage test data with Kotest.
Kotlin Collections
Finding the Minimum and Maximum Values in a Kotlin Array
Introduces how to find the minimum and maximum values among the elements of an array.
Kotest Koin Extension
This page introduces the Kotest Koin extension.
Kotest JSON Matchers
Explains JSON matchers.
Kotest Global Configuration
Some property test settings can be configured globally for all property tests.
Kotest Non-deterministic Testing
Non-deterministic Testing can help verify software integrity. For example, it can effectively test software systems that include random or unpredictable elements such as parallel processes, external network calls, and access to various system resources.
Kotest WireMock Extension
This page introduces the WireMock extension.
Kotest Ktor Matchers
Explains Ktor matchers.
Kotest Arrow Generators
Kotest provides an optional module that provides generators for Arrow.
Kotest Integrations
You can write more robust, higher-quality tests by using Kotest together with the mocking framework mockk and JaCoCo. This page explains mockk, which helps with test isolation and dependency management, and JaCoCo, a code coverage tool that measures how much of a codebase is tested.
Kotest Test Clock Extension
This page explains the Test Clock extension.
Kotest Kotlinx Datetime Matchers
Explains Kotlinx Datetime matchers.
Kotest Kotlinx DateTime Gens
Kotest provides an optional module that provides generators for KotlinX DateTime.
Kotest Test Ordering
Ordering in Kotest is a feature for controlling the order of test execution. It is useful when you want to run tests in a specific order or filter and run tests according to specific conditions.
Kotlin Generics
Kotest Pitest Extension
This page introduces the Pitest extension.
Kotest Arrow Matchers
Lists the current matchers in the Arrow matcher extension library.
Kotest Extra Arbs
Introduces additional Arbs for general-purpose data generation.
Grouping Kotest Tests with Tags
For effective software testing, writing and managing test cases is important. This section looks at how to write test cases with Kotest.
Kotest BlockHound Extension
This page introduces the BlockHound extension.
Kotest Reflective Arbs
When running tests on the JVM, Kotest supports automatically generating more complex Arbs.
Kotest Resources
This page explains how to automatically close resources in Kotest and how to temporarily create files and directories needed for tests.
Kotlin Advanced Keywords
Kotest Konform Matchers
Konform matchers can be used in tests to check whether a specified object passes or fails validation.
Kotest Configuration
Kotest Configuration is used to customize and control test execution behavior. It provides many configuration options so users can adjust the test environment as needed.
Kotest Klock Matchers
Explains Klock matchers.
Kotest Test Factories
Sometimes you may want to write a common set of tests and reuse it for specific inputs. In Kotest, you can do this with test factories, which generate tests that can be included in one or more specs.
Kotest Compiler Matchers
Explains compiler matchers.
Kotest Test Output
This page explains how to output Kotest test results.
Kotest Jsoup Matchers
Explains Jsoup matchers.
Kotest Timeouts
This page explains how to test with invocation time limits.
Declaring and Initializing Kotlin Lists
Introduces how to declare and initialize lists.
Kotest Other Settings
This page explains how to fail fast in Kotest, how to fail on an empty test suite, and other settings.
Removing Duplicate Elements with Kotlin List Distinct
Converting a Kotlin List to a Set
Getting the Length of Kotlin Lists and Arrays
Introduces how to get the length, size, and total number of elements of List and Array.
Various Ways to Use Kotlin Map
Introduces various ways to use Map, including mapOf, keys, values, mapKeys, mapValues, toSortedMap, Comparator, and getOrPut.
Various Ways to Use Kotlin Set
Introduces various ways to use Set, including setOf, mutableSetOf, union, intersection, and minus.
Converting a Kotlin Set to a List
Creating a Ktor Project
This article shows how to create a project using the Ktor framework.
MapStruct
Spring Data Neo4j - Add and Query Neo4j Data
Spring Data Neo4j is a framework for working with Neo4j, one of the graph databases.