Bael 1601 kotlin (#4016)
* add article files * update kotlin version in pom * IntelliJ added binary folder to all the .gitignores * IntelliJ added binary folder to all the .gitignores * update test function names * Expand tests and add more code for more meaningful content within the article. Remove core-kotlin from parent pom again for eclipse to work. * adjust for issues with custom-pmd * rename test * Revert "IntelliJ added binary folder to all the .gitignores" This reverts commit 0850a2acd5162499540231146c795cfda9ffcfc5. * Revert "IntelliJ added binary folder to all the .gitignores" This reverts commit 2b17cf2ff3624ecbe37f07bb9985ecfd3a977e01.
This commit is contained in:
pauljervis
Grzegorz Piwowarek
parent
c80befe225
commit
d7eaa00804
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@ -0,0 +1 @@
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/bin/
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@ -21,6 +21,11 @@
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</repositories>
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<dependencies>
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<dependency>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-math3</artifactId>
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<version>${commons-math3.version}</version>
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-engine</artifactId>
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@ -33,12 +38,6 @@
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<version>${junit.platform.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>${junit4.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.jetbrains.kotlin</groupId>
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<artifactId>kotlin-stdlib</artifactId>
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@ -46,7 +45,7 @@
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</dependency>
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<dependency>
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<groupId>org.jetbrains.kotlin</groupId>
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<artifactId>kotlin-stdlib-jre8</artifactId>
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<artifactId>kotlin-stdlib-jdk8</artifactId>
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<version>${kotlin-stdlib.version}</version>
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</dependency>
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<dependency>
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@ -194,14 +193,16 @@
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<kotlin-maven-plugin.version>1.1.2</kotlin-maven-plugin.version>
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<kotlin-test-junit.version>1.1.2</kotlin-test-junit.version>
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<kotlin-stdlib.version>1.1.2</kotlin-stdlib.version>
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<kotlin-reflect.version>1.1.2</kotlin-reflect.version>
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<kotlin-maven-plugin.version>1.2.31</kotlin-maven-plugin.version>
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<kotlin-test-junit.version>1.2.31</kotlin-test-junit.version>
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<kotlin-stdlib.version>1.2.31</kotlin-stdlib.version>
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<kotlin-reflect.version>1.2.31</kotlin-reflect.version>
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<kotlinx.version>0.15</kotlinx.version>
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<mockito-kotlin.version>1.5.0</mockito-kotlin.version>
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<kodein.version>4.1.0</kodein.version>
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<commons-math3.version>3.6.1</commons-math3.version>
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<junit.jupiter.version>5.0.0</junit.jupiter.version>
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<junit.platform.version>1.0.0</junit.platform.version>
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<junit.vintage.version>4.12.0</junit.vintage.version>
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package com.baeldung.filter
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import org.junit.jupiter.api.Assertions.assertIterableEquals
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import org.junit.jupiter.api.Test
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internal class ChunkedTest {
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@Test
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fun givenDNAFragmentString_whenChunking_thenProduceListOfChunks() {
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val dnaFragment = "ATTCGCGGCCGCCAA"
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val fragments = dnaFragment.chunked(3)
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assertIterableEquals(listOf("ATT", "CGC", "GGC", "CGC", "CAA"), fragments)
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}
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@Test
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fun givenDNAString_whenChunkingWithTransformer_thenProduceTransformedList() {
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val codonTable = mapOf("ATT" to "Isoleucine", "CAA" to "Glutamine", "CGC" to "Arginine", "GGC" to "Glycine")
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val dnaFragment = "ATTCGCGGCCGCCAA"
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val proteins = dnaFragment.chunked(3) { codon ->
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codonTable[codon.toString()] ?: error("Unknown codon")
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}
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assertIterableEquals(listOf("Isoleucine", "Arginine", "Glycine", "Arginine", "Glutamine"), proteins)
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}
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@Test
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fun givenListOfValues_whenChunking_thenProduceListOfArrays() {
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val whole = listOf(1, 4, 7, 4753, 2, 34, 62, 76, 5868, 0)
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val chunks = whole.chunked(6)
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val expected = listOf(listOf(1, 4, 7, 4753, 2, 34), listOf(62, 76, 5868, 0))
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assertIterableEquals(expected, chunks)
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}
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}
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package com.baeldung.filter
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import org.junit.jupiter.api.Assertions.assertIterableEquals
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import org.junit.jupiter.api.Test
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internal class DistinctTest {
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data class SmallClass(val key: String, val num: Int)
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@Test
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fun givenArrayOfSomeDuplicateValues_whenApplyingDistinct_thenReturnListOfNoDuplicateValues() {
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val array = arrayOf(1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 5, 6, 7, 8, 9)
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val result = array.distinct()
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val expected = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9)
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assertIterableEquals(expected, result)
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}
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@Test
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fun givenArrayOfClassObjects_whenApplyingDistinctOnClassProperty_thenReturnListDistinctOnThatValue() {
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val original = arrayOf(
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SmallClass("key1", 1),
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SmallClass("key2", 2),
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SmallClass("key3", 3),
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SmallClass("key4", 3),
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SmallClass("er", 9),
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SmallClass("er", 10),
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SmallClass("er", 11))
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val actual = original.distinctBy { it.key }
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val expected = listOf(
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SmallClass("key1", 1),
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SmallClass("key2", 2),
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SmallClass("key3", 3),
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SmallClass("key4", 3),
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SmallClass("er", 9))
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assertIterableEquals(expected, actual)
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}
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@Test
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fun givenArrayOfClassObjects_whenApplyingComplicatedSelector_thenReturnFirstElementToMatchEachSelectorValue() {
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val array = arrayOf(
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SmallClass("key1", 1),
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SmallClass("key2", 2),
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SmallClass("key3", 3),
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SmallClass("key4", 3),
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SmallClass("er", 9),
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SmallClass("er", 10),
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SmallClass("er", 11),
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SmallClass("er", 11),
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SmallClass("er", 91),
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SmallClass("blob", 22),
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SmallClass("dob", 27),
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SmallClass("high", 201_434_314))
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val actual = array.distinctBy { Math.floor(it.num / 10.0) }
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val expected = listOf(
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SmallClass("key1", 1),
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SmallClass("er", 10),
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SmallClass("er", 91),
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SmallClass("blob", 22),
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SmallClass("high", 201_434_314))
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assertIterableEquals(expected, actual)
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}
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}
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package com.baeldung.filter
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import org.junit.jupiter.api.Assertions.assertIterableEquals
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import org.junit.jupiter.api.Test
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internal class DropTest {
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@Test
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fun whenDroppingFirstTwoItemsOfArray_thenTwoLess() {
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val array = arrayOf(1, 2, 3, 4)
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val result = array.drop(2)
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val expected = listOf(3, 4)
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assertIterableEquals(expected, result)
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}
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@Test
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fun whenDroppingMoreItemsOfArray_thenEmptyList() {
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val array = arrayOf(1, 2, 3, 4)
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val result = array.drop(5)
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val expected = listOf<Int>()
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assertIterableEquals(expected, result)
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}
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@Test
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fun givenArray_whenDroppingLastElement_thenReturnListWithoutLastElement() {
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val array = arrayOf("1", "2", "3", "4")
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val result = array.dropLast(1)
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val expected = listOf("1", "2", "3")
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assertIterableEquals(expected, result)
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}
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@Test
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fun givenArrayOfFloats_whenDroppingLastUntilPredicateIsFalse_thenReturnSubsetListOfFloats() {
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val array = arrayOf(1f, 1f, 1f, 1f, 1f, 2f, 1f, 1f, 1f)
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val result = array.dropLastWhile { it == 1f }
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val expected = listOf(1f, 1f, 1f, 1f, 1f, 2f)
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assertIterableEquals(expected, result)
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}
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@Test
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fun givenList_whenDroppingMoreThanAvailable_thenThrowException() {
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val list = listOf('a', 'e', 'i', 'o', 'u')
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val result = list.drop(6)
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val expected: List<String> = listOf()
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assertIterableEquals(expected, result)
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}
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}
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package com.baeldung.filter
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import org.apache.commons.math3.primes.Primes
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import org.junit.jupiter.api.Assertions.assertIterableEquals
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import org.junit.jupiter.api.Test
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import kotlin.test.assertTrue
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internal class FilterTest {
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@Test
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fun givenAscendingValueMap_whenFilteringOnValue_ThenReturnSubsetOfMap() {
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val originalMap = mapOf("key1" to 1, "key2" to 2, "key3" to 3)
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val filteredMap = originalMap.filter { it.value < 2 }
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val expectedMap = mapOf("key1" to 1)
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assertTrue { expectedMap == filteredMap }
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}
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@Test
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fun givenSeveralCollections_whenFilteringToAccumulativeList_thenListContainsAllContents() {
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val array1 = arrayOf(90, 92, 93, 94, 92, 95, 93)
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val array2 = sequenceOf(51, 31, 83, 674_506_111, 256_203_161, 15_485_863)
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val list1 = listOf(0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
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val primes = mutableListOf<Int>()
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val expected = listOf(2, 3, 5, 7, 31, 83, 15_485_863, 256_203_161, 674_506_111)
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val primeCheck = { num: Int -> Primes.isPrime(num) }
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array1.filterTo(primes, primeCheck)
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list1.filterTo(primes, primeCheck)
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array2.filterTo(primes, primeCheck)
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primes.sort()
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assertIterableEquals(expected, primes)
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}
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}
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package com.baeldung.filter
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import org.junit.jupiter.api.Assertions.assertIterableEquals
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import org.junit.jupiter.api.Assertions.assertThrows
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import org.junit.jupiter.api.Test
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internal class SliceTest {
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@Test
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fun whenSlicingAnArrayWithDotRange_ThenListEqualsTheSlice() {
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val original = arrayOf(1, 2, 3, 2, 1)
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val actual = original.slice(1..3)
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val expected = listOf(2, 3, 2)
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assertIterableEquals(expected, actual)
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}
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@Test
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fun whenSlicingAnArrayWithDownToRange_thenListMadeUpOfReverseSlice() {
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val original = arrayOf(1, 2, 3, 2, 1)
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val actual = original.slice(3 downTo 0)
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val expected = listOf(2, 3, 2, 1)
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assertIterableEquals(expected, actual)
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}
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@Test
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fun whenSlicingBeyondTheRangeOfTheArray_thenContainManyNulls() {
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val original = arrayOf(12, 3, 34, 4)
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val actual = original.slice(3..8)
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val expected = listOf(4, null, null, null, null, null)
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assertIterableEquals(expected, actual)
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}
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@Test
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fun whenSlicingBeyondRangeOfArrayWithStep_thenOutOfBoundsException() {
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assertThrows(ArrayIndexOutOfBoundsException::class.java) {
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val original = arrayOf(12, 3, 34, 4)
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original.slice(3..8 step 2)
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}
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}
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}
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@ -0,0 +1,38 @@
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package com.baeldung.filter
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import org.junit.jupiter.api.Assertions.assertIterableEquals
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import org.junit.jupiter.api.Test
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internal class TakeTest {
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@Test
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fun `given array of alternating types, when predicating on 'is String', then produce list of array up until predicate is false`() {
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val originalArray = arrayOf("val1", 2, "val3", 4, "val5", 6)
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val actualList = originalArray.takeWhile { it is String }
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val expectedList = listOf("val1")
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assertIterableEquals(expectedList, actualList)
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}
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@Test
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fun `given array of alternating types, when taking 4 items, then produce list of first 4 items`() {
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val originalArray = arrayOf("val1", 2, "val3", 4, "val5", 6)
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val actualList = originalArray.take(4)
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val expectedList = listOf("val1", 2, "val3", 4)
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println(originalArray.drop(4))
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println(actualList)
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assertIterableEquals(expectedList, actualList)
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}
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@Test
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fun `when taking more items than available, then return all elements`() {
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val originalArray = arrayOf(1, 2)
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val actual = originalArray.take(10)
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val expected = listOf(1, 2)
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assertIterableEquals(expected, actual)
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}
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}
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