Added two more exercises to 'Creating classes'
This commit is contained in:
Svetlana Isakova
parent
1b8519f9f4
commit
9867257f37
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@ -1,29 +1 @@
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package creatingClasses1
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class Robot {
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fun goRight(steps: Int) {
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println("going right $steps steps")
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}
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fun goLeft(steps: Int) {
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println("going left $steps steps")
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}
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fun goDown(steps: Int) {
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println("going down $steps steps")
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}
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fun goUp(steps: Int) {
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println("going up $steps steps")
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}
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}
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/*
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fun main() {
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val robot = Robot()
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robot.goUp(11)
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}
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*/
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/* Output:
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going up 11 steps
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*/
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// type your solution here
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@ -2,11 +2,5 @@ type: edu
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files:
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- name: src/Task.kt
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visible: true
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placeholders:
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- offset: 26
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length: 296
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placeholder_text: // create Robot class
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- name: test/Tests.kt
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visible: false
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feedback_link: |
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https://docs.google.com/forms/d/e/1FAIpQLSdkaliSwYkjiV21bZl0yP-In2g5p17sAQCfaGjyHx_QYMWTiQ/viewform?usp=pp_url&entry.189755027=Introduction+to+Objects+%2F+Creating+Classes+%2F+Exercise1
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@ -1,2 +0,0 @@
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id: 399609
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update_date: Wed, 03 Oct 2018 12:37:41 UTC
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@ -1,17 +0,0 @@
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## Creating Classes (#1)
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Create the `Robot` class with the following four member functions:
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`goRight`, `goLeft`, `goDown` and `goUp`.
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Each of these functions should take an integer `steps` as a parameter
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and print one the following phrases to the console:
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```
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going right N steps
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```
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or
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```
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going left N steps
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```
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and so on accordingly, where N is the provided number of steps.
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@ -1,61 +1,11 @@
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package creatingClasses1
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import org.junit.FixMethodOrder
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import org.junit.Assert
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import org.junit.Test
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import org.junit.runners.MethodSorters
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import util.assertEqualsForOutput
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import util.TIMEOUT
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import java.io.ByteArrayOutputStream
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import java.io.PrintStream
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import java.lang.AssertionError
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@FixMethodOrder(MethodSorters.NAME_ASCENDING)
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class TestSimpleStringPalindrome {
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@Test(timeout = TIMEOUT)
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fun testRobot() {
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createRobotInstance()
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}
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fun testDirection(direction: String, steps: Int) {
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val (robotClass, robot) = createRobotInstance()
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val goMethod =
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try {
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robotClass.getMethod("go$direction", Int::class.java)
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} catch (e: NoSuchMethodException) {
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throw AssertionError("Can't find the 'go$direction(steps: Int)' member function in 'Robot' class")
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}
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val byteArrayOutputStream = ByteArrayOutputStream()
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System.setOut(PrintStream(byteArrayOutputStream))
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goMethod.invoke(robot, steps)
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assertEqualsForOutput("Incorrect output for 'go$direction' method",
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"going ${direction.decapitalize()} $steps steps",
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byteArrayOutputStream)
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}
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private fun createRobotInstance(): Pair<Class<out Any>, Any> {
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val robotClass =
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try {
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ClassLoader.getSystemClassLoader().loadClass("creatingClasses1.Robot")
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} catch (e: ClassNotFoundException) {
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throw AssertionError("Can't find the 'Robot' class in 'creatingClasses1' package")
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}
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val robot = robotClass.constructors.first().newInstance()
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return Pair(robotClass, robot)
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}
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@Test(timeout = TIMEOUT)
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fun testRight() = testDirection("Right", 11)
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@Test(timeout = TIMEOUT)
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fun testLeft() = testDirection("Left", 37)
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@Test(timeout = TIMEOUT)
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fun testUp() = testDirection("Up", 4)
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@Test(timeout = TIMEOUT)
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fun testDown() = testDirection("Down", 8)
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}
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class TestSomeClass {
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@Test fun testSolution() {
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//TODO: implement your test here
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Assert.assertTrue("Tests not implemented for the task", false)
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}
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}
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@ -1,11 +1,7 @@
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package creatingClasses3
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package creatingClasses4
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fun main() {
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val s = "Hello!"
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println(s.toUpperCase())
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println(s.toLowerCase())
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class Foo {
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fun bar() {
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println(toString())
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}
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}
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/* Output:
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HELLO!
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hello!
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*/
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@ -1,8 +1,6 @@
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type: ide
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type: edu
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files:
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- name: src/Task.kt
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visible: true
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- name: test/Tests.kt
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visible: false
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feedback_link: |
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https://docs.google.com/forms/d/e/1FAIpQLSdkaliSwYkjiV21bZl0yP-In2g5p17sAQCfaGjyHx_QYMWTiQ/viewform?usp=pp_url&entry.189755027=Introduction+to+Objects+%2F+Creating+Classes+%2F+Exercise2
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@ -1,13 +0,0 @@
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## Mastering the IDE: Quick Documentation
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The <span class="control">`Quick Documentation`</span> action produces
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information about a symbol, such as a function or a class.
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Press <span class="shortcut">&shortcut:QuickJavaDoc;</span> when the caret
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is on a class or a function, and IntelliJ Idea will show you the available
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documentation for this function or class.
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Call <span class="control">`Quick Documentation`</span> action
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for the `String` class and its `toUpperCase()` and `toLowerCase()` functions.
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Press <span class="shortcut">&shortcut:EditorEscape;</span> to close the
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quick documentation pop-up.
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@ -1 +1,37 @@
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package creatingClasses3
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package creatingClasses2
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import org.junit.Assert
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import org.junit.Test
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import util.assertEqualsForOutput
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import java.io.ByteArrayOutputStream
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import java.io.PrintStream
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import java.lang.AssertionError
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class TestFoo {
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@Test
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fun testSolution() {
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val fooClass =
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try {
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ClassLoader.getSystemClassLoader().loadClass("creatingClasses4.Foo")
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} catch (e: ClassNotFoundException) {
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throw AssertionError("Can't find the 'Foo' class in 'creatingClasses4' package")
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}
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val foo = fooClass.constructors.first().newInstance()
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val barMethod =
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try {
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fooClass.getMethod("bar")
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} catch (e: NoSuchMethodException) {
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throw AssertionError("Can't find the 'bar()' member function in 'Foo' class")
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}
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val byteArrayOutputStream = ByteArrayOutputStream()
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System.setOut(PrintStream(byteArrayOutputStream))
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barMethod.invoke(foo)
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val output = byteArrayOutputStream.toString()
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Assert.assertTrue("The output should contain @ sign", '@' in output)
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Assert.assertTrue("The output should contain 'Foo'", "Foo" in output)
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}
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}
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@ -1,12 +1,29 @@
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package creatingClasses4
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package creatingClasses3
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fun cap(s: String) = s.capitalize()
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class Robot {
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fun goRight(steps: Int) {
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println("going right $steps steps")
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}
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fun main() {
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println(cap("hi!"))
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println(cap("Hi!"))
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fun goLeft(steps: Int) {
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println("going left $steps steps")
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}
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fun goDown(steps: Int) {
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println("going down $steps steps")
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}
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fun goUp(steps: Int) {
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println("going up $steps steps")
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}
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}
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/*
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fun main() {
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val robot = Robot()
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robot.goUp(11)
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}
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*/
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/* Output:
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Hi!
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Hi!
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*/
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going up 11 steps
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*/
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@ -1,12 +1,12 @@
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type: ide
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type: edu
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files:
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- name: src/Task.kt
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visible: true
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placeholders:
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- offset: 48
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length: 13
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placeholder_text: ' '
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- offset: 26
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length: 296
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placeholder_text: // create Robot class
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- name: test/Tests.kt
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visible: false
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feedback_link: |
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https://docs.google.com/forms/d/e/1FAIpQLSdkaliSwYkjiV21bZl0yP-In2g5p17sAQCfaGjyHx_QYMWTiQ/viewform?usp=pp_url&entry.189755027=Introduction+to+Objects+%2F+Creating+Classes+%2F+Exercise3
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https://docs.google.com/forms/d/e/1FAIpQLSdkaliSwYkjiV21bZl0yP-In2g5p17sAQCfaGjyHx_QYMWTiQ/viewform?usp=pp_url&entry.189755027=Introduction+to+Objects+%2F+Creating+Classes+%2F+Exercise1
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@ -1,2 +1,2 @@
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id: 399613
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update_date: Wed, 03 Oct 2018 12:37:44 UTC
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id: 399609
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update_date: Wed, 03 Oct 2018 12:37:41 UTC
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@ -1,9 +1,17 @@
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## Mastering the IDE: Quick Documentation in the Completion List
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## Creating Classes (#1)
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The <span class="control">`Quick Documentation`</span> shortcut
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<span class="shortcut">&shortcut:QuickJavaDoc;</span>
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can be used not only in the editor but in the code completion popup list as well.
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Create the `Robot` class with the following four member functions:
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`goRight`, `goLeft`, `goDown` and `goUp`.
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Each of these functions should take an integer `steps` as a parameter
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and print one the following phrases to the console:
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Using this feature, find the function for `String` that upper-cases only its
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first letter, or returns the original string if it's already starts with an
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upper case letter.
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```
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going right N steps
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```
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or
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```
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going left N steps
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```
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and so on accordingly, where N is the provided number of steps.
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@ -1,29 +1,61 @@
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package creatingClasses4
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package creatingClasses3
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import org.junit.Assert
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import org.junit.FixMethodOrder
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import org.junit.Test
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import org.junit.runners.MethodSorters
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import util.assertEqualsForOutput
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import util.TIMEOUT
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import java.io.ByteArrayOutputStream
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import java.io.PrintStream
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import java.lang.AssertionError
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@FixMethodOrder(MethodSorters.NAME_ASCENDING)
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class TestCapitalize() {
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private fun testString(s: String) {
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Assert.assertEquals("""Wrong result for task("$s"):""", s.capitalize(), cap(s))
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class TestSimpleStringPalindrome {
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@Test(timeout = TIMEOUT)
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fun testRobot() {
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createRobotInstance()
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}
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fun testDirection(direction: String, steps: Int) {
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val (robotClass, robot) = createRobotInstance()
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val goMethod =
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try {
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robotClass.getMethod("go$direction", Int::class.java)
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} catch (e: NoSuchMethodException) {
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throw AssertionError("Can't find the 'go$direction(steps: Int)' member function in 'Robot' class")
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}
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val byteArrayOutputStream = ByteArrayOutputStream()
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System.setOut(PrintStream(byteArrayOutputStream))
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goMethod.invoke(robot, steps)
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assertEqualsForOutput("Incorrect output for 'go$direction' method",
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"going ${direction.decapitalize()} $steps steps",
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byteArrayOutputStream)
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}
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private fun createRobotInstance(): Pair<Class<out Any>, Any> {
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val robotClass =
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try {
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ClassLoader.getSystemClassLoader().loadClass("creatingClasses1.Robot")
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} catch (e: ClassNotFoundException) {
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throw AssertionError("Can't find the 'Robot' class in 'creatingClasses1' package")
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}
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val robot = robotClass.constructors.first().newInstance()
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return Pair(robotClass, robot)
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}
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@Test(timeout = TIMEOUT)
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fun test1() = testString("abc")
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fun testRight() = testDirection("Right", 11)
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@Test(timeout = TIMEOUT)
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fun test2() = testString("Abc")
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fun testLeft() = testDirection("Left", 37)
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@Test(timeout = TIMEOUT)
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fun test3() = testString("ABC")
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fun testUp() = testDirection("Up", 4)
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@Test(timeout = TIMEOUT)
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fun test4() = testString("aBc")
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@Test(timeout = TIMEOUT)
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fun test5() = testString("abC")
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}
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fun testDown() = testDirection("Down", 8)
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}
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@ -0,0 +1,11 @@
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package creatingClasses4
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fun main() {
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val s = "Hello!"
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println(s.toUpperCase())
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println(s.toLowerCase())
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}
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/* Output:
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HELLO!
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hello!
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*/
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@ -0,0 +1,8 @@
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type: ide
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files:
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- name: src/Task.kt
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visible: true
|
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- name: test/Tests.kt
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visible: false
|
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feedback_link: |
|
||||
https://docs.google.com/forms/d/e/1FAIpQLSdkaliSwYkjiV21bZl0yP-In2g5p17sAQCfaGjyHx_QYMWTiQ/viewform?usp=pp_url&entry.189755027=Introduction+to+Objects+%2F+Creating+Classes+%2F+Exercise2
|
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|
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@ -0,0 +1,13 @@
|
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## Mastering the IDE: Quick Documentation
|
||||
|
||||
The <span class="control">`Quick Documentation`</span> action produces
|
||||
information about a symbol, such as a function or a class.
|
||||
Press <span class="shortcut">&shortcut:QuickJavaDoc;</span> when the caret
|
||||
is on a class or a function, and IntelliJ Idea will show you the available
|
||||
documentation for this function or class.
|
||||
|
||||
Call <span class="control">`Quick Documentation`</span> action
|
||||
for the `String` class and its `toUpperCase()` and `toLowerCase()` functions.
|
||||
|
||||
Press <span class="shortcut">&shortcut:EditorEscape;</span> to close the
|
||||
quick documentation pop-up.
|
||||
|
|
@ -0,0 +1 @@
|
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package creatingClasses4
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@ -0,0 +1,12 @@
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package creatingClasses5
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fun cap(s: String) = s.capitalize()
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fun main() {
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println(cap("hi!"))
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println(cap("Hi!"))
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}
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/* Output:
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Hi!
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Hi!
|
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*/
|
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|
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@ -0,0 +1,12 @@
|
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type: ide
|
||||
files:
|
||||
- name: src/Task.kt
|
||||
visible: true
|
||||
placeholders:
|
||||
- offset: 48
|
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length: 13
|
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placeholder_text: ' '
|
||||
- name: test/Tests.kt
|
||||
visible: false
|
||||
feedback_link: |
|
||||
https://docs.google.com/forms/d/e/1FAIpQLSdkaliSwYkjiV21bZl0yP-In2g5p17sAQCfaGjyHx_QYMWTiQ/viewform?usp=pp_url&entry.189755027=Introduction+to+Objects+%2F+Creating+Classes+%2F+Exercise3
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|
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@ -0,0 +1,2 @@
|
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id: 399613
|
||||
update_date: Wed, 03 Oct 2018 12:37:44 UTC
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
## Mastering the IDE: Quick Documentation in the Completion List
|
||||
|
||||
The <span class="control">`Quick Documentation`</span> shortcut
|
||||
<span class="shortcut">&shortcut:QuickJavaDoc;</span>
|
||||
can be used not only in the editor but in the code completion popup list as well.
|
||||
|
||||
Using this feature, find the function for `String` that upper-cases only its
|
||||
first letter, or returns the original string if it's already starts with an
|
||||
upper case letter.
|
||||
|
|
@ -0,0 +1,29 @@
|
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package creatingClasses5
|
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|
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import org.junit.Assert
|
||||
import org.junit.FixMethodOrder
|
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import org.junit.Test
|
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import org.junit.runners.MethodSorters
|
||||
import util.TIMEOUT
|
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|
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@FixMethodOrder(MethodSorters.NAME_ASCENDING)
|
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class TestCapitalize() {
|
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private fun testString(s: String) {
|
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Assert.assertEquals("""Wrong result for task("$s"):""", s.capitalize(), cap(s))
|
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}
|
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|
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@Test(timeout = TIMEOUT)
|
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fun test1() = testString("abc")
|
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|
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@Test(timeout = TIMEOUT)
|
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fun test2() = testString("Abc")
|
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|
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@Test(timeout = TIMEOUT)
|
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fun test3() = testString("ABC")
|
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|
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@Test(timeout = TIMEOUT)
|
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fun test4() = testString("aBc")
|
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|
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@Test(timeout = TIMEOUT)
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fun test5() = testString("abC")
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}
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|
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@ -3,3 +3,5 @@ content:
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- Exercise 1
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- Exercise 2
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- Exercise 3
|
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- Exercise 4
|
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- Exercise 5
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