From 4d9c710a3daa8f3374f0d7fafb4b8d7d23fac6a6 Mon Sep 17 00:00:00 2001
From: Svetlana Isakova <svetlana.isakova@jetbrains.com>
Date: Wed, 9 Oct 2019 15:58:18 +0200
Subject: [PATCH] Added tests for 'show' exercise in 'String templates'

---
 .../String Templates/Exercise 3/src/Task.kt   | 18 ++++++++
 .../Exercise 3/task-info.yaml                 |  6 +++
 .../String Templates/Exercise 3/task.md       | 16 +++++++
 .../String Templates/Exercise 3/test/Tests.kt | 45 +++++++++++++++++++
 .../String Templates/lesson-info.yaml         |  1 +
 5 files changed, 86 insertions(+)
 create mode 100644 Programming Basics/String Templates/Exercise 3/src/Task.kt
 create mode 100644 Programming Basics/String Templates/Exercise 3/task-info.yaml
 create mode 100644 Programming Basics/String Templates/Exercise 3/task.md
 create mode 100644 Programming Basics/String Templates/Exercise 3/test/Tests.kt

diff --git a/Programming Basics/String Templates/Exercise 3/src/Task.kt b/Programming Basics/String Templates/Exercise 3/src/Task.kt
new file mode 100644
index 00000000..2d394b0d
--- /dev/null
+++ b/Programming Basics/String Templates/Exercise 3/src/Task.kt	
@@ -0,0 +1,18 @@
+package stringTemplates3
+
+fun show(i: Int, s: String, c: Char, d: Double) {
+  println("i: $i")
+  println("""s: "$s"""")
+  println("c: '$c'")
+  println("d: $d")
+}
+
+fun main() {
+  show(1, "abc", 'd', 2.0)
+}
+/* Expected output:
+i: 1
+s: "abc"
+c: 'd'
+d: 2.0
+*/
\ No newline at end of file
diff --git a/Programming Basics/String Templates/Exercise 3/task-info.yaml b/Programming Basics/String Templates/Exercise 3/task-info.yaml
new file mode 100644
index 00000000..7ad1b827
--- /dev/null
+++ b/Programming Basics/String Templates/Exercise 3/task-info.yaml	
@@ -0,0 +1,6 @@
+type: edu
+files:
+- name: src/Task.kt
+  visible: true
+- name: test/Tests.kt
+  visible: false
diff --git a/Programming Basics/String Templates/Exercise 3/task.md b/Programming Basics/String Templates/Exercise 3/task.md
new file mode 100644
index 00000000..d49ccdb0
--- /dev/null
+++ b/Programming Basics/String Templates/Exercise 3/task.md	
@@ -0,0 +1,16 @@
+## String Templates (#3)
+
+Write a function `show()` with parameters `i: Int`, `s: String`, `c: Char` 
+and `d: Double`. The function should display on the console the value of each
+parameter in its own line: first the name of the identifier, a colon and space, 
+and then the value of that identifier. Surround the string value with double
+quotes and the char value with single quotes. 
+
+Sample output:
+
+```
+i: 10
+s: "abc"
+c: 'a'
+d: 1.0
+```
\ No newline at end of file
diff --git a/Programming Basics/String Templates/Exercise 3/test/Tests.kt b/Programming Basics/String Templates/Exercise 3/test/Tests.kt
new file mode 100644
index 00000000..48e57923
--- /dev/null
+++ b/Programming Basics/String Templates/Exercise 3/test/Tests.kt	
@@ -0,0 +1,45 @@
+import org.junit.Assert
+import org.junit.Test
+import stringTemplates3.show
+import java.io.ByteArrayOutputStream
+import java.io.PrintStream
+import kotlin.reflect.KFunction
+import kotlin.reflect.KParameter
+
+class TestShowFunction {
+  @Test
+  fun testShow() {
+    val showMethod = ::show
+    Assert.assertEquals("'show' method should have 4 parameters", 4, showMethod.parameters.size)
+    val (i, s, c, d) = showMethod.parameters
+    checkParameter(i, "i", "kotlin.Int")
+    checkParameter(s, "s", "kotlin.String")
+    checkParameter(c, "c", "kotlin.Char")
+    checkParameter(d, "d", "kotlin.Double")
+
+    testArguments(showMethod, 1, "abc", 'd', 2.0)
+    testArguments(showMethod, 193, "string", '&', -7.51)
+  }
+
+  private fun testArguments(showMethod: KFunction<*>, i: Int, s: String, c: Char, d: Double) {
+    val byteArrayOutputStream = ByteArrayOutputStream()
+    System.setOut(PrintStream(byteArrayOutputStream))
+
+    val message = "Incorrect output for 'show' function call"
+    val expectedOutput = """
+        i: $i
+        s: "$s"
+        c: '$c'
+        d: $d
+      """.trimIndent()
+    showMethod.call(i, s, c, d)
+
+    val output = byteArrayOutputStream.toString().trim()
+    Assert.assertEquals(message, expectedOutput, output)
+  }
+
+  private fun checkParameter(i: KParameter, expectedName: String, expectedType: String) {
+    Assert.assertEquals("The name of the first parameter should be '$expectedName'", expectedName, i.name)
+    Assert.assertEquals("The type of the first parameter should be '$expectedType'", expectedType, i.type.toString())
+  }
+}
\ No newline at end of file
diff --git a/Programming Basics/String Templates/lesson-info.yaml b/Programming Basics/String Templates/lesson-info.yaml
index 0a407cf0..536bd6af 100644
--- a/Programming Basics/String Templates/lesson-info.yaml	
+++ b/Programming Basics/String Templates/lesson-info.yaml	
@@ -2,5 +2,6 @@ content:
 - Examples
 - Exercise 1
 - Exercise 2
+- Exercise 3
 - Exercise 4
 - Exercise 5