write-krayon-tests

name	write-krayon-tests
description	Write Kotlin Multiplatform tests for Krayon library code. Use when the user asks to add tests, verify a ported implementation, or when implementing new Krayon features that need test coverage.

Write Krayon Tests

Placement and framework

Tests go in <module>/src/commonTest/kotlin/, mirroring the main source structure. Use kotlin.test only — no JUnit or other platform-specific frameworks in commonTest.

Naming conventions

• Class: <Feature>Tests (e.g. CardinalTests).
• Method: descriptive_camelCase_describingBehavior (e.g. cardinal_withDefaultTension_producesExpectedPath).

Floating-point comparisons

Use assertEquals with the absoluteTolerance parameter:

assertEquals(expected, actual = result, absoluteTolerance = 1e-4f)

Coverage checklist

1. Happy path: typical input produces expected output.
2. Edge cases: empty, single-element, and boundary inputs.
3. Parameter variations: test non-default configuration values.
4. Upstream equivalence: when porting, include at least one test using exact upstream fixture data.

Running tests

./gradlew :<module>:allTests     # all platforms
./gradlew :<module>:jvmTest      # quick JVM-only check