Kotlin - Completed Clock
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6 changed files with 424 additions and 6 deletions
16
kotlin/clock/README.md
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16
kotlin/clock/README.md
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# Clock
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Implement a clock that handles times without dates.
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You should be able to add and subtract minutes to it.
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Two clocks that represent the same time should be equal to each other.
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## Source
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Pairing session with Erin Drummond [https://twitter.com/ebdrummond](https://twitter.com/ebdrummond)
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## Submitting Incomplete Solutions
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It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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28
kotlin/clock/build.gradle
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28
kotlin/clock/build.gradle
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buildscript {
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ext.kotlin_version = '1.1.1'
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repositories {
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mavenCentral()
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}
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dependencies {
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classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
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}
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}
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apply plugin: 'kotlin'
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repositories {
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mavenCentral()
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}
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dependencies {
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compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
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testCompile 'junit:junit:4.12'
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testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"
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}
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test {
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testLogging {
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exceptionFormat = 'full'
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events = ["passed", "failed", "skipped"]
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}
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}
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@ -12,22 +12,34 @@ data class Clock(var hours: Int, var minutes: Int) {
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}
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private fun addMinutes(x: Int): Unit {
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if (x > 59){
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if ((x + this.minutes) >= 60) {
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addHours((x + this.minutes).div(60))
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this.minutes = (x + this.minutes).rem(60)
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} else {
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this.minutes += x
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}
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while (this.minutes < 0){
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this.minutes += 60
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this.hours -= 1
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}
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this.hours = if (this.hours.rem(24) < 0) { 24 + this.hours.rem(24) } else this.hours.rem(24)
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}
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private fun addHours(x: Int): Unit {
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if (x + this.hours > 23){
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this.hours = (x+this.hours).rem(24)
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} else {
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this.hours += x
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}
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}
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fun add(i: Int) {
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this.addMinutes(i)
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this.addHours(i.div(60))
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}
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override fun toString(): String {
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return "${if (hours > 9){ "$hours"} else {"0$hours"}}:${if (minutes > 9){ "$minutes"} else {"0$minutes"}}"
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}
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}
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}
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138
kotlin/clock/src/test/kotlin/ClockAddTest.kt
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138
kotlin/clock/src/test/kotlin/ClockAddTest.kt
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import org.junit.Ignore
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import org.junit.Test
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import kotlin.test.assertEquals
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/*
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* version: 1.0.1
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*/
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class ClockAddTest {
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@Ignore
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@Test
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fun addMinutes() {
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val clock = Clock(10, 0)
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clock.add(3)
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assertEquals("10:03", clock.toString())
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}
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@Ignore
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@Test
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fun addNoMinutes() {
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val clock = Clock(6, 41)
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clock.add(0)
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assertEquals("06:41", clock.toString())
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}
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@Ignore
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@Test
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fun addToNextHour() {
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val clock = Clock(0, 45)
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clock.add(40)
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assertEquals("01:25", clock.toString())
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}
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@Ignore
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@Test
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fun addMoreThanOneHour() {
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val clock = Clock(10, 0)
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clock.add(61)
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assertEquals("11:01", clock.toString())
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}
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@Ignore
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@Test
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fun addMoreThanTwoHoursWithCarry() {
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val clock = Clock(0, 45)
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clock.add(160)
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assertEquals("03:25", clock.toString())
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}
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@Ignore
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@Test
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fun addAcrossMidnight() {
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val clock = Clock(23, 59)
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clock.add(2)
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assertEquals("00:01", clock.toString())
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}
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@Ignore
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@Test
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fun addMoreThanOneDay() {
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val clock = Clock(5, 32)
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clock.add(1500)
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assertEquals("06:32", clock.toString())
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}
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@Ignore
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@Test
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fun addMoreThanTwoDays() {
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val clock = Clock(1, 1)
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clock.add(3500)
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assertEquals("11:21", clock.toString())
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}
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@Ignore
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@Test
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fun subtractMinutes() {
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val clock = Clock(10, 3)
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clock.add(-3)
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assertEquals("10:00", clock.toString())
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}
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@Ignore
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@Test
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fun subtractToPreviousHour() {
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val clock = Clock(10, 3)
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clock.add(-30)
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assertEquals("09:33", clock.toString())
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}
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@Ignore
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@Test
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fun subtractMoreThanAnHour() {
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val clock = Clock(10, 3)
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clock.add(-70)
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assertEquals("08:53", clock.toString())
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}
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@Ignore
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@Test
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fun subtractAcrossMidnight() {
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val clock = Clock(0, 3)
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clock.add(-4)
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assertEquals("23:59", clock.toString())
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}
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@Ignore
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@Test
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fun subtractMoreThanTwoHours() {
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val clock = Clock(0, 0)
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clock.add(-160)
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assertEquals("21:20", clock.toString())
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}
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@Ignore
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@Test
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fun subtractMoreThanTwoHoursWithBorrow() {
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val clock = Clock(6, 15)
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clock.add(-160)
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assertEquals("03:35", clock.toString())
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}
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@Ignore
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@Test
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fun subtractMoreThanOneDay() {
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val clock = Clock(5, 32)
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clock.add(-1500)
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assertEquals("04:32", clock.toString())
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}
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@Ignore
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@Test
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fun subtractMoreThanTwoDays() {
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val clock = Clock(2, 20)
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clock.add(-3000)
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assertEquals("00:20", clock.toString())
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}
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}
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123
kotlin/clock/src/test/kotlin/ClockCreationTest.kt
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123
kotlin/clock/src/test/kotlin/ClockCreationTest.kt
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import org.junit.Ignore
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import org.junit.Test
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import kotlin.test.assertEquals
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/*
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* version: 1.0.1
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*/
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class ClockCreationTest {
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@Test
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fun canPrintTimeOnTheHour() {
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assertEquals("08:00", Clock(8, 0).toString())
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}
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@Ignore
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@Test
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fun canPrintTimeWithMinutes() {
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assertEquals("11:09", Clock(11, 9).toString())
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}
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@Ignore
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@Test
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fun midnightPrintsAsZero() {
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assertEquals("00:00", Clock(24, 0).toString())
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}
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@Ignore
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@Test
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fun hourRollsOver() {
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assertEquals("01:00", Clock(25, 0).toString())
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}
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@Ignore
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@Test
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fun hourRollsOverContinuously() {
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assertEquals("04:00", Clock(100, 0).toString())
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}
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@Ignore
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@Test
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fun sixtyMinutesIsNextHour() {
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assertEquals("02:00", Clock(1, 60).toString())
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}
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@Ignore
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@Test
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fun minutesRollOver() {
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assertEquals("02:40", Clock(0, 160).toString())
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}
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@Ignore
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@Test
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fun minutesRollOverContinuously() {
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assertEquals("04:43", Clock(0, 1723).toString())
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}
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@Ignore
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@Test
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fun hourAndMinutesRollOver() {
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assertEquals("03:40", Clock(25, 160).toString())
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}
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@Ignore
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@Test
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fun hourAndMinutesRollOverContinuously() {
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assertEquals("11:01", Clock(201, 3001).toString())
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}
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@Ignore
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@Test
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fun hourAndMinutesRollOverToExactlyMidnight() {
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assertEquals("00:00", Clock(72, 8640).toString())
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}
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@Ignore
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@Test
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fun negativeHour() {
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assertEquals("23:15", Clock(-1, 15).toString())
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}
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@Ignore
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@Test
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fun negativeHourRollsOver() {
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assertEquals("23:00", Clock(-25, 0).toString())
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}
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@Ignore
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@Test
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fun negativeHourRollsOverContinuously() {
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assertEquals("05:00", Clock(-91, 0).toString())
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}
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@Ignore
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@Test
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fun negativeMinutes() {
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assertEquals("00:20", Clock(1, -40).toString())
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}
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@Ignore
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@Test
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fun negativeMinutesRollOver() {
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assertEquals("22:20", Clock(1, -160).toString())
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}
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@Ignore
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@Test
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fun negativeMinutesRollOverContinuously() {
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assertEquals("16:40", Clock(1, -4820).toString())
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}
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@Ignore
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@Test
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fun negativeHourAndMinutesBothRollOver() {
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assertEquals("20:20", Clock(-25, -160).toString())
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}
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@Ignore
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@Test
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fun negativeHourAndMinutesBothRollOverContinuously() {
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assertEquals("22:10", Clock(-121, -5810).toString())
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}
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}
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101
kotlin/clock/src/test/kotlin/ClockEqualTest.kt
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101
kotlin/clock/src/test/kotlin/ClockEqualTest.kt
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import org.junit.Ignore
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import org.junit.Test
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import kotlin.test.assertNotEquals
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import kotlin.test.assertEquals
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/*
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* version: 1.0.1
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*/
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class ClockEqualTest {
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@Ignore
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@Test
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fun clocksWithSameTimeAreEqual() {
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assertEquals(Clock(15, 37), Clock(15, 37))
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}
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@Ignore
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@Test
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fun clocksAMinuteApartAreNotEqual() {
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assertNotEquals(Clock(15, 36), Clock(15, 37))
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}
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@Ignore
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@Test
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fun clocksAnHourApartAreNotEqual() {
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assertNotEquals(Clock(14, 37), Clock(15, 37))
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}
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@Ignore
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@Test
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fun clocksWithHourOverflow() {
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assertEquals(Clock(10, 37), Clock(34, 37))
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}
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@Ignore
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@Test
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fun clocksWithHourOverflowBySeveralDays() {
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assertEquals(Clock(3, 11), Clock(99, 11))
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}
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@Ignore
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@Test
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fun clocksWithNegateHour() {
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assertEquals(Clock(22, 40), Clock(-2, 40))
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}
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@Ignore
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@Test
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fun clocksWithNegativeHourThatWraps() {
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assertEquals(Clock(17, 3), Clock(-31, 3))
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}
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@Ignore
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@Test
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fun clocksWithNegativeHourThatWrapsMultipleTimes() {
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assertEquals(Clock(13, 49), Clock(-83, 49))
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}
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@Ignore
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@Test
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fun clocksWithMinuteOverflow() {
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assertEquals(Clock(0, 1), Clock(0, 1441))
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}
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@Ignore
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@Test
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fun clocksWithMinuteOverflowBySeveralDays() {
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assertEquals(Clock(2, 2), Clock(2, 4322))
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}
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@Ignore
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@Test
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fun clocksWithNegativeMinutes() {
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assertEquals(Clock(2, 40), Clock(3, -20))
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}
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@Ignore
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@Test
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fun clocksWithNegativeMinutesThatWraps() {
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assertEquals(Clock(4, 10), Clock(5, -1490))
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}
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@Ignore
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@Test
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fun clocksWithNegativeMinutesThatWrapsMultipleTimes() {
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assertEquals(Clock(6, 15), Clock(6, -4305))
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}
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@Ignore
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@Test
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fun clocksWithNegativeHoursAndMinutes() {
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assertEquals(Clock(7, 32), Clock(-12, -268))
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}
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@Ignore
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@Test
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fun clocksWithNegativeHoursAndMinutesThatWrap() {
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assertEquals(Clock(18, 7), Clock(-54, -11513))
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}
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}
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