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package org.openrs2.util.collect
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import kotlin.test.Test
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import kotlin.test.assertEquals
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import kotlin.test.assertFailsWith
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import kotlin.test.assertFalse
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import kotlin.test.assertNull
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import kotlin.test.assertTrue
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class IterableUtilsTest {
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@Test
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fun testRemoveFirst() {
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val list = mutableListOf(1, 2, 3)
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assertEquals(1, list.removeFirst())
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assertEquals(listOf(2, 3), list)
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assertEquals(2, list.removeFirst())
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assertEquals(listOf(3), list)
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assertEquals(3, list.removeFirst())
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assertEquals(emptyList(), list)
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assertFailsWith<NoSuchElementException> {
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list.removeFirst()
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}
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}
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@Test
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fun testRemoveFirstOrNull() {
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val list = mutableListOf(1, 2, 3)
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assertEquals(1, list.removeFirstOrNull())
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assertEquals(listOf(2, 3), list)
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assertEquals(2, list.removeFirstOrNull())
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assertEquals(listOf(3), list)
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assertEquals(3, list.removeFirstOrNull())
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assertEquals(emptyList(), list)
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assertNull(list.removeFirstOrNull())
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}
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@Test
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fun testRemoveFirstMatching() {
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val list = mutableListOf(1, 2, 2, 3)
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assertTrue(list.removeFirst { it == 2 })
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assertEquals(listOf(1, 2, 3), list)
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assertTrue(list.removeFirst { it == 2 })
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assertEquals(listOf(1, 3), list)
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assertFalse(list.removeFirst { it == 2 })
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assertEquals(listOf(1, 3), list)
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}
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}
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