How to use sample method of com.sksamuel.kotest.property.arbitrary.FilterTest class

Best Kotest code snippet using com.sksamuel.kotest.property.arbitrary.FilterTest.sample

FilterTest.kt

Source:FilterTest.kt Github

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...34 }35 test("should be stack safe") {36 val arb = object : Arb<Int>() {37 override fun edgecase(rs: RandomSource): Int? = null38 override fun sample(rs: RandomSource): Sample<Int> = Sample(rs.random.nextInt())39 }40 shouldNotThrow<StackOverflowError> {41 arb.filter { it % 2 == 0 }.take(1000000).toList()42 }43 }44 test("should apply filter to shrinks") {45 val arbEvenInts = Arb.int(-100..100).filter { it % 2 == 0 }46 val oddNumbers = (-100..100).filter { it % 2 != 0 }47 arbEvenInts.samples().take(100).forAll { sample ->48 sample.shrinks.value() shouldNotBeIn oddNumbers49 sample.shrinks.children.value.forAll {50 it.value() shouldNotBeIn oddNumbers51 }52 }53 }54 test("Arb.filter composition should not exhaust call stack") {55 var arb: Arb<Int> = Arb.of(0, 1)56 repeat(10000) {57 arb = arb.filter { it == 0 }58 }59 val result = shouldNotThrowAny { arb.single(RandomSource.seeded(1234L)) }60 result shouldBe 061 }62})...

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1import com.sksamuel.kotest.property.arbitrary.FilterTest2import io.kotest.core.spec.style.StringSpec3import io.kotest.matchers.shouldBe4import io.kotest.property.Arb5import io.kotest.property.arbitrary.filter6import io.kotest.property.arbitrary.int7import io.kotest.property.arbitrary.string8import io.kotest.property.checkAll9class FilterTest : StringSpec({10 "FilterTest" {11 checkAll(Arb.int().filter { it > 0 }) { i ->12 }13 }14 "FilterTest with custom message" {15 checkAll(Arb.string().filter("must contain a") { it.contains("a") }) { s ->16 }17 }18})19import com.sksamuel.kotest.property.arbitrary.NonEmptyListTest20import io.kotest.core.spec.style.String

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1import com.sksamuel.kotest.property.arbitrary.FilterTest2import io.kotest.core.spec.style.StringSpec3import io.kotest.matchers.shouldBe4import io.kotest.property.Arb5import io.kotest.property.arbitrary.filter6import io.kotest.property.arbitrary.int7import io.kotest.property.arbitrary.sample8import io.kotest.property.arbitrary.string9class FilterTest : StringSpec({10 "filter should filter out invalid values" {11 val arb = Arb.string().filter { it.length > 5 }12 arb.sample().length shouldBe 613 }14 "filter should filter out invalid values with index" {15 val arb = Arb.int().filter { it, _ -> it > 5 }16 arb.sample() shouldBe 617 }18})19import com.sksamuel.kotest.property.arbitrary.FilterTest20import io.kotest.core.spec.style.StringSpec21import io.kotest.matchers.shouldBe22import io.kotest.property.Arb23import io.kotest.property.arbitrary.filter24import io.kotest.property.arbitrary.int25import io.kotest.property.arbitrary.sample26import io.kotest.property.arbitrary.string27class FilterTest : StringSpec({28 "filter should filter out invalid values" {29 val arb = Arb.string().filter { it.length > 5 }30 arb.sample().length shouldBe 631 }32 "filter should filter out invalid values with index" {33 val arb = Arb.int().filter { it, _ -> it > 5 }34 arb.sample() shouldBe 635 }36})37import com.sksamuel.kotest.property.arbitrary.FilterTest38import io.kotest.core.spec.style.StringSpec39import io.kotest.matchers.shouldBe40import io.kotest.property.Arb41import io.kotest.property.arbitrary.filter42import io.kotest.property.arbitrary.int43import io.kotest.property.arbitrary.sample44import io.kotest.property.arbitrary.string45class FilterTest : StringSpec({46 "filter should filter out invalid values" {47 val arb = Arb.string().filter { it.length > 5 }

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1import com.sksamuel.kotest.property.arbitrary.FilterTest2import io.kotest.core.spec.style.FunSpec3import io.kotest.matchers.shouldBe4import io.kotest.property.Arb5import io.kotest.property.arbitrary.filter6import io.kotest.property.arbitrary.int7import io.kotest.property.checkAll8class FilterTest : FunSpec({9 test("filter") {10 checkAll(Arb.int().filter { it > 0 }) {11 }12 }13 test("filter with message") {14 checkAll(Arb.int().filter("must be positive") { it > 0 }) {15 }16 }17 test("filter with message and custom exception") {18 checkAll(Arb.int().filter("must be positive", { IllegalArgumentException(it) }) { it > 0 }) {19 }20 }21 test("filter with custom exception") {22 checkAll(Arb.int().filter({ IllegalArgumentException(it) }) { it > 0 }) {23 }24 }25 test("filter with custom exception and message") {26 checkAll(Arb.int().filter({ IllegalArgumentException(it) }, "must be positive") { it > 0 }) {27 }28 }29 test("filter with custom exception and message and custom exception") {30 checkAll(Arb.int().filter({ IllegalArgumentException(it) }, "must be positive", { IllegalArgumentException(it) }) { it > 0 }) {31 }32 }33 test("filter with custom exception and custom exception") {34 checkAll(Arb.int().filter({ IllegalArgumentException(it) }, { IllegalArgumentException(it) }) { it > 0 }) {35 }36 }37 test("filter with custom exception and custom exception and message") {38 checkAll(Arb.int().filter({ IllegalArgumentException(it) }, { IllegalArgumentException(it) }, "must be positive") { it > 0 }) {39 }40 }41})42 at com.sksamuel.kotest.property.arbitrary.FilterTest$1.invoke(FilterTest.kt:

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1val result = checkAll(100, Arb.filter(Arb.int(), { it < 100 })) {2}3val result = checkAll(100, Arb.filter(Arb.int(), { it < 100 })) {4}5val result = checkAll(100, Arb.filter(Arb.int(), { it < 100 })) {6}7val result = checkAll(100, Arb.filter(Arb.int(), { it < 100 })) {8}9val result = checkAll(100, Arb.filter(Arb.int(), { it < 100 })) {10}11val result = checkAll(100, Arb.filter(Arb.int(), { it < 100 })) {12}13val result = checkAll(100, Arb.filter(Arb.int(), { it < 100 })) {14}15val result = checkAll(100, Arb.filter(Arb.int(), { it < 100 })) {16}17val result = checkAll(100, Arb.filter(Arb.int(), { it < 100 })) {18}19val result = checkAll(100, Arb.filter(Arb.int(), { it < 100 })) {

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1 property("filter should return only elements that match the predicate") {2 forAll(3 Gen.list(Gen.int()),4 Gen.int()5 ) { list, i ->6 val filtered = list.filter { it % i == 0 }7 filtered.all { it % i == 0 }8 }9 }10 property("filter should return only elements that match the predicate") {11 forAll(12 Gen.list(Gen.int()),13 Gen.int()14 ) { list, i ->15 val filtered = list.filter { it % i == 0 }16 filtered.all { it % i == 0 }17 }18 }19 }

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