jvmMain.io.kotest.matchers.reflection.compose.kt Maven / Gradle / Ivy

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package io.kotest.matchers.reflection

import io.kotest.matchers.Matcher
import io.kotest.matchers.MatcherResult
import kotlin.reflect.KProperty1

@Suppress("UNCHECKED_CAST")
fun  Matcher.Companion.compose(
   vararg pairs: Pair, KProperty1>
): Matcher = object : Matcher {
   override fun test(value: T): MatcherResult {
      val results = pairs.map { (matcher, prop) ->
         (matcher as Matcher).test(prop.get(value))
      }

      return MatcherResult(
         results.all { it.passed() },
         {
            results.map { it.failureMessage() }.fold("") { acc: String, s: String -> acc + s + "\n" }
               .trimIndent()
         },
         {
            results.map { it.negatedFailureMessage() }.fold("") { acc: String, s: String -> acc + s + "\n" }
               .trimIndent()
         },
      )
   }
}