Added tests for 'truth table' task

Programming Basics/Booleans/Exercise 2/src/Task.kt

@@ -0,0 +1,25 @@
+package booleans2
+
+fun showAnd(first: Boolean, second: Boolean) {
+  println("$first && $second == ${first && second}")
+}
+
+fun showOr(first: Boolean, second: Boolean) {
+  println("$first || $second == ${first || second}")
+}
+
+fun showTruthTable() {
+  showAnd(true, true)
+  showAnd(true, false)
+  showAnd(false, true)
+  showAnd(false, false)
+
+  showOr(true, true)
+  showOr(true, false)
+  showOr(false, true)
+  showOr(false, false)
+}
+
+fun main() {
+  showTruthTable()
+}

Programming Basics/Booleans/Exercise 2/task-info.yaml

@@ -0,0 +1,6 @@
+type: edu
+files:
+- name: src/Task.kt
+  visible: true
+- name: test/Tests.kt
+  visible: false

Programming Basics/Booleans/Exercise 2/task.md

@@ -0,0 +1,16 @@
+## Booleans (#2)
+
+Create a "truth table" for `&&` and `||`. Write a function `showAnd(first:
+Boolean, second: Boolean)` that uses a `String` template to show `first`, the
+`&&` symbol, `second`, `==` symbol, and then the result of `first && second`.
+Write a similar function for `showOr()`.
+
+The sample output for `showAnd(true, true)` should be:
+
+```
+true && true == true
+```
+
+Then write a function `showTruthTable` that should display a table produced by
+all possible combinations of `true` and `false` for both `showAnd()` and
+`showOr()`. Make sure you include all possible ordering.

Programming Basics/Booleans/Exercise 2/test/Tests.kt

@@ -0,0 +1,57 @@
+package booleans2
+
+import org.junit.Assert
+import org.junit.FixMethodOrder
+import org.junit.Test
+import org.junit.runners.MethodSorters
+import util.runAndCheckSystemOutput
+import util.runAndGetSystemOutput
+
+@FixMethodOrder(MethodSorters.NAME_ASCENDING)
+class TestBooleans {
+  @Test
+  fun test1ShowFunctions() {
+    testShowAnd(true, true)
+    testShowAnd(true, false)
+    testShowAnd(false, true)
+    testShowAnd(false, false)
+
+    testShowOr(true, true)
+    testShowOr(true, false)
+    testShowOr(false, true)
+    testShowOr(false, false)
+  }
+
+  private fun testShowAnd(first: Boolean, second: Boolean) {
+    runAndCheckSystemOutput("Wrong output for 'showAnd($first, $second)",
+      "$first && $second == ${first && second}") {
+      showAnd(first, second)
+    }
+  }
+
+  private fun testShowOr(first: Boolean, second: Boolean) {
+    runAndCheckSystemOutput("Wrong output for 'showOr($first, $second)",
+      "$first || $second == ${first || second}") {
+      showOr(first, second)
+    }
+  }
+
+  @Test
+  fun test2Table() {
+    val table = runAndGetSystemOutput { showTruthTable() }
+    val expectedLines = """
+      true && true == true
+      true && false == false
+      false && true == false
+      false && false == false
+      true || true == true
+      true || false == true
+      false || true == true
+      false || false == false
+    """.trimIndent().lines()
+    expectedLines.forEach {
+        Assert.assertTrue("""Not found the line "$it" in the table""",
+          it in table)
+    }
+  }
+}

Programming Basics/Booleans/Exercise 3/src/Task.kt

@@ -1,4 +1,4 @@
-package booleans2
+package booleans3
 
 fun and(b1: Boolean, b2: Boolean): Boolean =
     if (b1) b2 else false

Programming Basics/Booleans/Exercise 3/test/Tests.kt

@@ -1,4 +1,4 @@
-package booleans2
+package booleans3
 
 import org.junit.Assert
 import org.junit.FixMethodOrder

Programming Basics/Booleans/Exercise 4/src/Foo.kt

@@ -1,3 +1,3 @@
-package booleans3
+package booleans4
 
 fun foo(): Boolean = true

Programming Basics/Booleans/Exercise 4/src/Task.kt

@@ -1,4 +1,4 @@
-package booleans3
+package booleans4
 
 fun main() {
   println(foo())

Programming Basics/Booleans/Exercise 4/test/Tests.kt

@@ -1 +1 @@
-package booleans3
+package booleans4

Programming Basics/Booleans/lesson-info.yaml

@@ -1,5 +1,6 @@
 content:
 - Examples
 - Exercise 1
+- Exercise 2
 - Exercise 3
 - Exercise 4