├── .gitignore ├── .idea ├── codeStyles │ ├── Project.xml │ └── codeStyleConfig.xml ├── kotlinc.xml ├── misc.xml ├── modules.xml ├── runConfigurations.xml └── vcs.xml ├── .travis.yml ├── LICENSE ├── README.md ├── app ├── .gitignore ├── build.gradle ├── proguard-rules.pro └── src │ ├── androidTest │ └── java │ │ └── com │ │ └── karumi │ │ └── magiccounterkataandroid │ │ └── AndroidCounterStorageTest.kt │ ├── main │ ├── AndroidManifest.xml │ ├── java │ │ └── com │ │ │ └── karumi │ │ │ └── magiccounterkataandroid │ │ │ ├── CounterStorage.kt │ │ │ ├── MagicCounter.kt │ │ │ └── RandomNumberGenerator.kt │ └── res │ │ ├── drawable-v24 │ │ └── ic_launcher_foreground.xml │ │ ├── drawable │ │ └── ic_launcher_background.xml │ │ ├── mipmap-anydpi-v26 │ │ ├── ic_launcher.xml │ │ └── ic_launcher_round.xml │ │ ├── mipmap-hdpi │ │ ├── ic_launcher.png │ │ └── ic_launcher_round.png │ │ ├── mipmap-mdpi │ │ ├── ic_launcher.png │ │ └── ic_launcher_round.png │ │ ├── mipmap-xhdpi │ │ ├── ic_launcher.png │ │ └── ic_launcher_round.png │ │ ├── mipmap-xxhdpi │ │ ├── ic_launcher.png │ │ └── ic_launcher_round.png │ │ ├── mipmap-xxxhdpi │ │ ├── ic_launcher.png │ │ └── ic_launcher_round.png │ │ └── values │ │ ├── colors.xml │ │ ├── strings.xml │ │ └── styles.xml │ └── test │ └── java │ └── com │ └── karumi │ └── magiccounterkataandroid │ └── MagicCounterTest.kt ├── build.gradle ├── gradle.properties ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat └── settings.gradle /.gitignore: -------------------------------------------------------------------------------- 1 | # Built application files 2 | *.apk 3 | *.ap_ 4 | 5 | # Files for the ART/Dalvik VM 6 | *.dex 7 | 8 | # Java class files 9 | *.class 10 | 11 | # Generated files 12 | bin/ 13 | gen/ 14 | out/ 15 | 16 | # Gradle files 17 | .gradle/ 18 | build/ 19 | 20 | # Local configuration file (sdk path, etc) 21 | local.properties 22 | 23 | # Proguard folder generated by Eclipse 24 | proguard/ 25 | 26 | # Log Files 27 | *.log 28 | 29 | # Android Studio Navigation editor temp files 30 | .navigation/ 31 | 32 | # Android Studio captures folder 33 | captures/ 34 | 35 | # IntelliJ 36 | *.iml 37 | .idea/workspace.xml 38 | .idea/tasks.xml 39 | .idea/gradle.xml 40 | .idea/assetWizardSettings.xml 41 | .idea/dictionaries 42 | .idea/libraries 43 | .idea/caches 44 | 45 | # Keystore files 46 | # Uncomment the following line if you do not want to check your keystore files in. 47 | #*.jks 48 | 49 | # External native build folder generated in Android Studio 2.2 and later 50 | .externalNativeBuild 51 | 52 | # Google Services (e.g. APIs or Firebase) 53 | google-services.json 54 | 55 | # Freeline 56 | freeline.py 57 | freeline/ 58 | freeline_project_description.json 59 | 60 | # fastlane 61 | fastlane/report.xml 62 | fastlane/Preview.html 63 | fastlane/screenshots 64 | fastlane/test_output 65 | fastlane/readme.md 66 | -------------------------------------------------------------------------------- /.idea/codeStyles/Project.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 6 | 7 | 8 | 10 | 11 | 12 |
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92 | 93 | 94 | 95 | .* 96 | 97 | http://schemas.android.com/apk/res/android 98 | 99 | 100 | ANDROID_ATTRIBUTE_ORDER 101 | 102 |
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104 | 105 | 106 | 107 | .* 108 | 109 | .* 110 | 111 | 112 | BY_NAME 113 | 114 |
115 | 116 | 117 | 118 | 119 | 121 | 122 | -------------------------------------------------------------------------------- /.idea/codeStyles/codeStyleConfig.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 5 | -------------------------------------------------------------------------------- /.idea/kotlinc.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 6 | -------------------------------------------------------------------------------- /.idea/misc.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 9 | -------------------------------------------------------------------------------- /.idea/modules.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /.idea/runConfigurations.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 11 | 12 | -------------------------------------------------------------------------------- /.idea/vcs.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: android 2 | sudo: required 3 | jdk: 4 | - oraclejdk8 5 | 6 | android: 7 | components: 8 | - tools 9 | - platform-tools 10 | - build-tools-29.0.2 11 | - android-22 12 | - android-29 13 | - extra-android-support 14 | - extra-google-m2repository 15 | - extra-android-m2repository 16 | - sys-img-armeabi-v7a-android-22 17 | 18 | before_script: 19 | - echo no | android create avd --force -n test -t android-22 --abi armeabi-v7a 20 | - emulator -avd test -no-audio -no-window & 21 | - android-wait-for-emulator 22 | - adb shell input keyevent 82 & 23 | 24 | script: 25 | - ./gradlew check 26 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ![Karumi logo][karumilogo] Kata Magic Counter for Kotlin. [![Build Status](https://travis-ci.com/Karumi/MagicCounterKataAndroid.svg?branch=master)](https://travis-ci.com/Karumi/MagicCounterKataAndroid) 2 | ========================================================= 3 | 4 | - We are here to practice unit and integration testing 5 | - We are going to use JUnit and instrumentation tests. 6 | - We are going to practice pair programming. 7 | 8 | During this kata we will try to find how to use unit and instrumentation tests properly: 9 | 10 | * Using unit and integration tests. 11 | * Writing test doubles manually. 12 | * Using the already tested code to check if the tests are working fine (manual mutation testing). 13 | 14 | ## Getting started 15 | 16 | Once upon a time, there was a magic counter we have to implement now. This magic counter was persistent and it could be incremented and decremented. The magic counter follows these rules: 17 | 18 | * If there was no a previously counter value saved we will assume the value is 0. 19 | * When incremented the persistent value of the counter is obtained and a random number generator emits a random integer value. 20 | * If the random value is greater than 100 the counter value is incremented with the random value and saved. 21 | * If the random value is not greater than 100 the counter value is incremented by one and saved. 22 | * When decremented the value is decremented by 1. 23 | 24 | ## Tasks 25 | 26 | Your task as AndroidDeveloper is to resolve this problem and add coverage to your implementation. 27 | 28 | * If you want to practice TDD write a little piece of software to implement the already described scenario following the TDD cycle. 29 | * If you don not want to follow the TDD path create an empty project, and use JUnit to test your program. 30 | 31 | # License 32 | 33 | Copyright 2019 Karumi 34 | 35 | Licensed under the Apache License, Version 2.0 (the "License"); 36 | you may not use this file except in compliance with the License. 37 | You may obtain a copy of the License at 38 | 39 | http://www.apache.org/licenses/LICENSE-2.0 40 | 41 | Unless required by applicable law or agreed to in writing, software 42 | distributed under the License is distributed on an "AS IS" BASIS, 43 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 44 | See the License for the specific language governing permissions and 45 | limitations under the License. 46 | 47 | [karumilogo]: https://cloud.githubusercontent.com/assets/858090/11626547/e5a1dc66-9ce3-11e5-908d-537e07e82090.png -------------------------------------------------------------------------------- /app/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | apply plugin: 'kotlin-android' 4 | 5 | apply plugin: 'kotlin-android-extensions' 6 | 7 | android { 8 | compileSdkVersion 29 9 | buildToolsVersion "29.0.2" 10 | defaultConfig { 11 | applicationId "com.karumi.magiccounterkataandroid" 12 | minSdkVersion 15 13 | targetSdkVersion 29 14 | versionCode 1 15 | versionName "1.0" 16 | testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" 17 | } 18 | buildTypes { 19 | release { 20 | minifyEnabled false 21 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' 22 | } 23 | } 24 | } 25 | 26 | repositories { 27 | jcenter() 28 | } 29 | 30 | configurations { 31 | ktlint 32 | } 33 | 34 | dependencies { 35 | ktlint "com.pinterest:ktlint:0.35.0" 36 | 37 | implementation fileTree(dir: 'libs', include: ['*.jar']) 38 | implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" 39 | implementation 'androidx.appcompat:appcompat:1.1.0' 40 | implementation 'androidx.core:core-ktx:1.1.0' 41 | testImplementation 'junit:junit:4.12' 42 | 43 | androidTestImplementation 'androidx.test.ext:junit:1.1.1' 44 | androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0' 45 | } 46 | 47 | task ktlint(type: JavaExec, group: "verification") { 48 | description = "Check Kotlin code style." 49 | main = "com.pinterest.ktlint.Main" 50 | classpath = configurations.ktlint 51 | args "src/**/*.kt" 52 | } 53 | 54 | check.dependsOn ktlint 55 | 56 | task ktlintFormat(type: JavaExec, group: "formatting") { 57 | description = "Fix Kotlin code style deviations." 58 | main = "com.pinterest.ktlint.Main" 59 | classpath = configurations.ktlint 60 | args "-F", "src/**/*.kt" 61 | } -------------------------------------------------------------------------------- /app/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # You can control the set of applied configuration files using the 3 | # proguardFiles setting in build.gradle. 4 | # 5 | # For more details, see 6 | # http://developer.android.com/guide/developing/tools/proguard.html 7 | 8 | # If your project uses WebView with JS, uncomment the following 9 | # and specify the fully qualified class name to the JavaScript interface 10 | # class: 11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 12 | # public *; 13 | #} 14 | 15 | # Uncomment this to preserve the line number information for 16 | # debugging stack traces. 17 | #-keepattributes SourceFile,LineNumberTable 18 | 19 | # If you keep the line number information, uncomment this to 20 | # hide the original source file name. 21 | #-renamesourcefileattribute SourceFile 22 | -------------------------------------------------------------------------------- /app/src/androidTest/java/com/karumi/magiccounterkataandroid/AndroidCounterStorageTest.kt: -------------------------------------------------------------------------------- 1 | package com.karumi.magiccounterkataandroid 2 | 3 | import androidx.test.ext.junit.runners.AndroidJUnit4 4 | import androidx.test.platform.app.InstrumentationRegistry 5 | import org.junit.After 6 | import org.junit.Assert.assertEquals 7 | import org.junit.Assert.assertNull 8 | import org.junit.Before 9 | import org.junit.Test 10 | import org.junit.runner.RunWith 11 | 12 | @RunWith(AndroidJUnit4::class) 13 | class AndroidCounterStorageTest { 14 | 15 | private lateinit var storage: AndroidCounterStorage 16 | 17 | @Before 18 | fun setUp() { 19 | val context = InstrumentationRegistry.getInstrumentation().targetContext 20 | storage = AndroidCounterStorage(context) 21 | storage.clear() 22 | } 23 | 24 | @After 25 | fun tearDown() { 26 | storage.clear() 27 | } 28 | 29 | @Test 30 | fun returnsNullIfTheCounterValueWasNotSavedBefore() { 31 | assertNull(storage.get()) 32 | } 33 | 34 | @Test 35 | fun returnsTheValuePreviouslySaved() { 36 | val counter = 1 37 | 38 | storage.save(counter) 39 | 40 | assertEquals(counter, storage.get()) 41 | } 42 | 43 | @Test 44 | fun overridesTheValuePreviouslySavedWithANewOne() { 45 | val counter = 1 46 | 47 | storage.save(0) 48 | storage.save(counter) 49 | 50 | assertEquals(counter, storage.get()) 51 | } 52 | } 53 | -------------------------------------------------------------------------------- /app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 3 | 4 | 11 | 12 | -------------------------------------------------------------------------------- /app/src/main/java/com/karumi/magiccounterkataandroid/CounterStorage.kt: -------------------------------------------------------------------------------- 1 | package com.karumi.magiccounterkataandroid 2 | 3 | import android.content.Context 4 | import android.content.Context.MODE_PRIVATE 5 | 6 | interface CounterStorage { 7 | fun save(value: Int) 8 | fun get(): Int? 9 | fun clear() 10 | } 11 | 12 | class AndroidCounterStorage(private val context: Context) : CounterStorage { 13 | companion object { 14 | private const val preferencesFileName = "CounterStorage" 15 | private const val counterKey = "CounterStorage_counter" 16 | } 17 | 18 | private val preferences = context.getSharedPreferences(preferencesFileName, MODE_PRIVATE) 19 | 20 | override fun save(value: Int) = preferences.edit().putInt(counterKey, value).apply() 21 | 22 | override fun get(): Int? = if (preferences.contains(counterKey)) { 23 | preferences.getInt(counterKey, 0) 24 | } else { 25 | null 26 | } 27 | 28 | override fun clear() = preferences.edit().remove(counterKey).apply() 29 | } 30 | -------------------------------------------------------------------------------- /app/src/main/java/com/karumi/magiccounterkataandroid/MagicCounter.kt: -------------------------------------------------------------------------------- 1 | package com.karumi.magiccounterkataandroid 2 | 3 | class MagicCounter(private val random: RandomNumberGenerator, private val storage: CounterStorage) { 4 | fun increase(): Int { 5 | val currentCounter = storage.get() ?: 0 6 | val randomValue = random.randomValue() 7 | val updatedCounter = if (randomValue > 100) { 8 | currentCounter + randomValue 9 | } else { 10 | currentCounter + 1 11 | } 12 | storage.save(updatedCounter) 13 | return updatedCounter 14 | } 15 | 16 | fun decrease(): Int { 17 | val updatedCounter = (storage.get() ?: 0) - 1 18 | storage.save(updatedCounter) 19 | return updatedCounter 20 | } 21 | } 22 | -------------------------------------------------------------------------------- /app/src/main/java/com/karumi/magiccounterkataandroid/RandomNumberGenerator.kt: -------------------------------------------------------------------------------- 1 | package com.karumi.magiccounterkataandroid 2 | 3 | import kotlin.random.Random 4 | 5 | interface RandomNumberGenerator { 6 | fun randomValue(): Int 7 | } 8 | 9 | class DefaultRandomNumberGenerator : RandomNumberGenerator { 10 | override fun randomValue(): Int = Random.nextInt() 11 | } 12 | -------------------------------------------------------------------------------- /app/src/main/res/drawable-v24/ic_launcher_foreground.xml: -------------------------------------------------------------------------------- 1 | 7 | 12 | 13 | 19 | 22 | 25 | 26 | 27 | 28 | 34 | 35 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/ic_launcher_background.xml: -------------------------------------------------------------------------------- 1 | 2 | 7 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 125 | 130 | 135 | 140 | 145 | 150 | 155 | 160 | 165 | 170 | 171 | -------------------------------------------------------------------------------- /app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | -------------------------------------------------------------------------------- /app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Karumi/MagicCounterKataAndroid/51978411d97dc82864e9c446086fe150c40dd1fe/app/src/main/res/mipmap-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Karumi/MagicCounterKataAndroid/51978411d97dc82864e9c446086fe150c40dd1fe/app/src/main/res/mipmap-hdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Karumi/MagicCounterKataAndroid/51978411d97dc82864e9c446086fe150c40dd1fe/app/src/main/res/mipmap-mdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-mdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Karumi/MagicCounterKataAndroid/51978411d97dc82864e9c446086fe150c40dd1fe/app/src/main/res/mipmap-mdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Karumi/MagicCounterKataAndroid/51978411d97dc82864e9c446086fe150c40dd1fe/app/src/main/res/mipmap-xhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Karumi/MagicCounterKataAndroid/51978411d97dc82864e9c446086fe150c40dd1fe/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Karumi/MagicCounterKataAndroid/51978411d97dc82864e9c446086fe150c40dd1fe/app/src/main/res/mipmap-xxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Karumi/MagicCounterKataAndroid/51978411d97dc82864e9c446086fe150c40dd1fe/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Karumi/MagicCounterKataAndroid/51978411d97dc82864e9c446086fe150c40dd1fe/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Karumi/MagicCounterKataAndroid/51978411d97dc82864e9c446086fe150c40dd1fe/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/values/colors.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | #008577 4 | #00574B 5 | #D81B60 6 | 7 | -------------------------------------------------------------------------------- /app/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | MagicCounterKataAndroid 3 | 4 | -------------------------------------------------------------------------------- /app/src/main/res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /app/src/test/java/com/karumi/magiccounterkataandroid/MagicCounterTest.kt: -------------------------------------------------------------------------------- 1 | package com.karumi.magiccounterkataandroid 2 | 3 | import org.junit.Assert.assertEquals 4 | import org.junit.Before 5 | import org.junit.Test 6 | 7 | class MagicCounterTest { 8 | 9 | private lateinit var random: MockRandomNumberGenerator 10 | private lateinit var storage: MockCounterStorage 11 | private lateinit var magicCounter: MagicCounter 12 | 13 | @Before 14 | fun setUp() { 15 | random = MockRandomNumberGenerator() 16 | storage = MockCounterStorage() 17 | magicCounter = MagicCounter(random, storage) 18 | } 19 | 20 | @Test 21 | fun returnsTheRandomValueIfTheCounterWasNotSavedPreviouslyAndTheRandomValueIsGreaterThan100() { 22 | random.value = 101 23 | 24 | val result = magicCounter.increase() 25 | 26 | assertEquals(101, result) 27 | } 28 | 29 | @Test 30 | fun returns1IfTheCounterWasNotSavedPreviouslyAndTheRandomValueIsLowerOrEqualTo100() { 31 | random.value = 100 32 | 33 | val result = magicCounter.increase() 34 | 35 | assertEquals(1, result) 36 | } 37 | 38 | @Test 39 | fun savesTheCounterValueIfTheRandomNumberIsGreaterThan100() { 40 | random.value = 101 41 | 42 | magicCounter.increase() 43 | 44 | assertEquals(101, storage.get()) 45 | } 46 | 47 | @Test 48 | fun savesTheCounterValueIfTheRandomNumberIsLowerOrEqualTo100() { 49 | random.value = 100 50 | 51 | magicCounter.increase() 52 | 53 | assertEquals(1, storage.get()) 54 | } 55 | 56 | @Test 57 | fun twoConsecutiveIncrementsGreaterThan100ReturnsTheExpectedValue() { 58 | random.value = 101 59 | 60 | magicCounter.increase() 61 | val result = magicCounter.increase() 62 | 63 | assertEquals(202, result) 64 | } 65 | 66 | @Test 67 | fun twoConsecutiveIncrementsLowerOrEqualTo100ReturnsTheExpectedValue() { 68 | random.value = 99 69 | 70 | magicCounter.increase() 71 | val result = magicCounter.increase() 72 | 73 | assertEquals(2, result) 74 | } 75 | 76 | @Test 77 | fun oneIncrementWithRandomValueLowerThan100AndAnotherOneGreaterThan100ReturnsTheExpectedValue() { 78 | random.value = 1 79 | 80 | magicCounter.increase() 81 | random.value = 101 82 | val result = magicCounter.increase() 83 | 84 | assertEquals(102, result) 85 | } 86 | 87 | @Test 88 | fun oneIncrementGreaterThan100AndAnotherOneLowerThan100ReturnsTheExpectedValue() { 89 | random.value = 101 90 | 91 | magicCounter.increase() 92 | random.value = 1 93 | val result = magicCounter.increase() 94 | 95 | assertEquals(102, result) 96 | } 97 | 98 | @Test 99 | fun ifThereWasNoPreviouslySavedValuesTheResultWillBeMinusOne() { 100 | val result = magicCounter.decrease() 101 | 102 | assertEquals(-1, result) 103 | } 104 | 105 | @Test 106 | fun ifTheValueIsIncrementedTwiceWithoutAnyPreviouslySavedValueTheResultIsMinusTwo() { 107 | magicCounter.decrease() 108 | val result = magicCounter.decrease() 109 | 110 | assertEquals(-2, result) 111 | } 112 | 113 | @Test 114 | fun ifTheValueWasPreviouslyIncreasedTheResultIsOneUnitLess() { 115 | random.value = 101 116 | 117 | magicCounter.increase() 118 | val result = magicCounter.decrease() 119 | 120 | assertEquals(100, result) 121 | } 122 | } 123 | 124 | private class MockRandomNumberGenerator : RandomNumberGenerator { 125 | var value: Int = 0 126 | override fun randomValue(): Int = value 127 | } 128 | 129 | private class MockCounterStorage : CounterStorage { 130 | private var value: Int? = null 131 | override fun save(value: Int) { 132 | this.value = value 133 | } 134 | 135 | override fun get(): Int? = value 136 | 137 | override fun clear() { 138 | value = null 139 | } 140 | } 141 | -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | // Top-level build file where you can add configuration options common to all sub-projects/modules. 2 | 3 | buildscript { 4 | ext.kotlin_version = '1.3.60' 5 | repositories { 6 | google() 7 | jcenter() 8 | 9 | } 10 | dependencies { 11 | classpath 'com.android.tools.build:gradle:3.5.2' 12 | classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" 13 | // NOTE: Do not place your application dependencies here; they belong 14 | // in the individual module build.gradle files 15 | } 16 | } 17 | 18 | allprojects { 19 | repositories { 20 | google() 21 | jcenter() 22 | 23 | } 24 | } 25 | 26 | task clean(type: Delete) { 27 | delete rootProject.buildDir 28 | } 29 | -------------------------------------------------------------------------------- /gradle.properties: -------------------------------------------------------------------------------- 1 | # Project-wide Gradle settings. 2 | # IDE (e.g. Android Studio) users: 3 | # Gradle settings configured through the IDE *will override* 4 | # any settings specified in this file. 5 | # For more details on how to configure your build environment visit 6 | # http://www.gradle.org/docs/current/userguide/build_environment.html 7 | # Specifies the JVM arguments used for the daemon process. 8 | # The setting is particularly useful for tweaking memory settings. 9 | org.gradle.jvmargs=-Xmx1536m 10 | # When configured, Gradle will run in incubating parallel mode. 11 | # This option should only be used with decoupled projects. More details, visit 12 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects 13 | # org.gradle.parallel=true 14 | # AndroidX package structure to make it clearer which packages are bundled with the 15 | # Android operating system, and which are packaged with your app's APK 16 | # https://developer.android.com/topic/libraries/support-library/androidx-rn 17 | android.useAndroidX=true 18 | # Automatically convert third-party libraries to use AndroidX 19 | android.enableJetifier=true 20 | # Kotlin code style for this project: "official" or "obsolete": 21 | kotlin.code.style=official 22 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Karumi/MagicCounterKataAndroid/51978411d97dc82864e9c446086fe150c40dd1fe/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Fri Nov 29 11:38:59 CET 2019 2 | distributionBase=GRADLE_USER_HOME 3 | distributionPath=wrapper/dists 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip 7 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | ############################################################################## 4 | ## 5 | ## Gradle start up script for UN*X 6 | ## 7 | ############################################################################## 8 | 9 | # Attempt to set APP_HOME 10 | # Resolve links: $0 may be a link 11 | PRG="$0" 12 | # Need this for relative symlinks. 13 | while [ -h "$PRG" ] ; do 14 | ls=`ls -ld "$PRG"` 15 | link=`expr "$ls" : '.*-> \(.*\)$'` 16 | if expr "$link" : '/.*' > /dev/null; then 17 | PRG="$link" 18 | else 19 | PRG=`dirname "$PRG"`"/$link" 20 | fi 21 | done 22 | SAVED="`pwd`" 23 | cd "`dirname \"$PRG\"`/" >/dev/null 24 | APP_HOME="`pwd -P`" 25 | cd "$SAVED" >/dev/null 26 | 27 | APP_NAME="Gradle" 28 | APP_BASE_NAME=`basename "$0"` 29 | 30 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 31 | DEFAULT_JVM_OPTS="" 32 | 33 | # Use the maximum available, or set MAX_FD != -1 to use that value. 34 | MAX_FD="maximum" 35 | 36 | warn () { 37 | echo "$*" 38 | } 39 | 40 | die () { 41 | echo 42 | echo "$*" 43 | echo 44 | exit 1 45 | } 46 | 47 | # OS specific support (must be 'true' or 'false'). 48 | cygwin=false 49 | msys=false 50 | darwin=false 51 | nonstop=false 52 | case "`uname`" in 53 | CYGWIN* ) 54 | cygwin=true 55 | ;; 56 | Darwin* ) 57 | darwin=true 58 | ;; 59 | MINGW* ) 60 | msys=true 61 | ;; 62 | NONSTOP* ) 63 | nonstop=true 64 | ;; 65 | esac 66 | 67 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 68 | 69 | # Determine the Java command to use to start the JVM. 70 | if [ -n "$JAVA_HOME" ] ; then 71 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 72 | # IBM's JDK on AIX uses strange locations for the executables 73 | JAVACMD="$JAVA_HOME/jre/sh/java" 74 | else 75 | JAVACMD="$JAVA_HOME/bin/java" 76 | fi 77 | if [ ! -x "$JAVACMD" ] ; then 78 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 79 | 80 | Please set the JAVA_HOME variable in your environment to match the 81 | location of your Java installation." 82 | fi 83 | else 84 | JAVACMD="java" 85 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 86 | 87 | Please set the JAVA_HOME variable in your environment to match the 88 | location of your Java installation." 89 | fi 90 | 91 | # Increase the maximum file descriptors if we can. 92 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 93 | MAX_FD_LIMIT=`ulimit -H -n` 94 | if [ $? -eq 0 ] ; then 95 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 96 | MAX_FD="$MAX_FD_LIMIT" 97 | fi 98 | ulimit -n $MAX_FD 99 | if [ $? -ne 0 ] ; then 100 | warn "Could not set maximum file descriptor limit: $MAX_FD" 101 | fi 102 | else 103 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 104 | fi 105 | fi 106 | 107 | # For Darwin, add options to specify how the application appears in the dock 108 | if $darwin; then 109 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 110 | fi 111 | 112 | # For Cygwin, switch paths to Windows format before running java 113 | if $cygwin ; then 114 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 115 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 116 | JAVACMD=`cygpath --unix "$JAVACMD"` 117 | 118 | # We build the pattern for arguments to be converted via cygpath 119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 120 | SEP="" 121 | for dir in $ROOTDIRSRAW ; do 122 | ROOTDIRS="$ROOTDIRS$SEP$dir" 123 | SEP="|" 124 | done 125 | OURCYGPATTERN="(^($ROOTDIRS))" 126 | # Add a user-defined pattern to the cygpath arguments 127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 129 | fi 130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 131 | i=0 132 | for arg in "$@" ; do 133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 135 | 136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 138 | else 139 | eval `echo args$i`="\"$arg\"" 140 | fi 141 | i=$((i+1)) 142 | done 143 | case $i in 144 | (0) set -- ;; 145 | (1) set -- "$args0" ;; 146 | (2) set -- "$args0" "$args1" ;; 147 | (3) set -- "$args0" "$args1" "$args2" ;; 148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;; 149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 154 | esac 155 | fi 156 | 157 | # Escape application args 158 | save () { 159 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 160 | echo " " 161 | } 162 | APP_ARGS=$(save "$@") 163 | 164 | # Collect all arguments for the java command, following the shell quoting and substitution rules 165 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 166 | 167 | # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong 168 | if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then 169 | cd "$(dirname "$0")" 170 | fi 171 | 172 | exec "$JAVACMD" "$@" 173 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @if "%DEBUG%" == "" @echo off 2 | @rem ########################################################################## 3 | @rem 4 | @rem Gradle startup script for Windows 5 | @rem 6 | @rem ########################################################################## 7 | 8 | @rem Set local scope for the variables with windows NT shell 9 | if "%OS%"=="Windows_NT" setlocal 10 | 11 | set DIRNAME=%~dp0 12 | if "%DIRNAME%" == "" set DIRNAME=. 13 | set APP_BASE_NAME=%~n0 14 | set APP_HOME=%DIRNAME% 15 | 16 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 17 | set DEFAULT_JVM_OPTS= 18 | 19 | @rem Find java.exe 20 | if defined JAVA_HOME goto findJavaFromJavaHome 21 | 22 | set JAVA_EXE=java.exe 23 | %JAVA_EXE% -version >NUL 2>&1 24 | if "%ERRORLEVEL%" == "0" goto init 25 | 26 | echo. 27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 28 | echo. 29 | echo Please set the JAVA_HOME variable in your environment to match the 30 | echo location of your Java installation. 31 | 32 | goto fail 33 | 34 | :findJavaFromJavaHome 35 | set JAVA_HOME=%JAVA_HOME:"=% 36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 37 | 38 | if exist "%JAVA_EXE%" goto init 39 | 40 | echo. 41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 42 | echo. 43 | echo Please set the JAVA_HOME variable in your environment to match the 44 | echo location of your Java installation. 45 | 46 | goto fail 47 | 48 | :init 49 | @rem Get command-line arguments, handling Windows variants 50 | 51 | if not "%OS%" == "Windows_NT" goto win9xME_args 52 | 53 | :win9xME_args 54 | @rem Slurp the command line arguments. 55 | set CMD_LINE_ARGS= 56 | set _SKIP=2 57 | 58 | :win9xME_args_slurp 59 | if "x%~1" == "x" goto execute 60 | 61 | set CMD_LINE_ARGS=%* 62 | 63 | :execute 64 | @rem Setup the command line 65 | 66 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 67 | 68 | @rem Execute Gradle 69 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% 70 | 71 | :end 72 | @rem End local scope for the variables with windows NT shell 73 | if "%ERRORLEVEL%"=="0" goto mainEnd 74 | 75 | :fail 76 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 77 | rem the _cmd.exe /c_ return code! 78 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 79 | exit /b 1 80 | 81 | :mainEnd 82 | if "%OS%"=="Windows_NT" endlocal 83 | 84 | :omega 85 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | include ':app' 2 | rootProject.name='MagicCounterKataAndroid' 3 | --------------------------------------------------------------------------------