commonMain.io.kotest.matchers.collections.empty.kt Maven / Gradle / Ivy

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package io.kotest.matchers.collections

import io.kotest.assertions.show.show
import io.kotest.matchers.Matcher
import io.kotest.matchers.MatcherResult
import io.kotest.matchers.invokeMatcher
import io.kotest.matchers.should
import io.kotest.matchers.shouldNot

fun  Iterable?.shouldBeEmpty(): Iterable {
   if (this == null) fail()
   toList().shouldBeEmpty()
   return this
}

fun  Array?.shouldBeEmpty(): Array {
   if (this == null) fail()
   asList().shouldBeEmpty()
   return this
}

fun  Collection?.shouldBeEmpty(): Collection {
   if (this == null) fail()
   this should beEmpty()
   return this
}

fun  Iterable?.shouldNotBeEmpty(): Iterable {
   if (this == null) fail()
   toList().shouldNotBeEmpty()
   return this
}

fun  Array?.shouldNotBeEmpty(): Array {
   if (this == null) fail()
   asList().shouldNotBeEmpty()
   return this
}

fun  Collection?.shouldNotBeEmpty(): Collection {
   if (this == null) fail()
   this shouldNot beEmpty()
   return this
}

fun  beEmpty(): Matcher> = object : Matcher> {
   override fun test(value: Collection): MatcherResult = MatcherResult(
      value.isEmpty(),
      { "Collection should be empty but contained ${value.show().value}" },
      { "Collection should not be empty" }
   )
}

private fun fail(): Nothing {
   invokeMatcher(null, Matcher.failure("Should be empty but was null"))
   throw NotImplementedError()
}