Create QueenAttackTestGenerator.scala. Update QueenAttackTest.scala. Refs exercism#370, exercism#331

Author: ricemery

exercises/queen-attack/example.scala

@@ -1,28 +1,5 @@
-object Queens {
-
-  def boardString(white: Option[Position], black: Option[Position]): String = {
-
-    def rowString(row: Int): String =
-      (0 until 8).flatMap(col => tileString(row, col)).mkString
-
-    def tileString(row: Int, col: Int): String =
-      tileChar(Position(row, col)).toString + tileSep(col)
-
-    def tileChar(pos: Position): Char =
-      Some(pos) match {
-        case `white` => 'W'
-        case `black` => 'B'
-        case _ => '_'
-      }
-
-    def tileSep(col: Int) =
-      if (col == 7) '\n'
-      else ' '
-
-    (0 until 8).flatMap(row => rowString(row)).mkString
-  }
-
-  def canAttack(white: Position, black: Position): Boolean = {
+object QueenAttack {
+  def canAttack(white: Queen, black: Queen): Boolean = {
     val canAttackHoriz = white.x == black.x
     val canAttackVert = white.y == black.y
     val deltaRow = Math.abs(white.x - black.x)
@@ -33,5 +10,16 @@ object Queens {
   }
 }
 
-case class Position(x: Int, y: Int)
+case class Queen(x: Int, y: Int)
+
+object Queen {
+  def create(x: Int, y: Int): Option[Queen] = {
+    val min = 0
+    val max = 7
+    if (x >= min && x <= max && y >= min && y <= max)
+      Some(Queen(x, y))
+    else
+      None
+  }
+}
 

exercises/queen-attack/src/main/scala/Queens.scala

@@ -0,0 +1,71 @@
+import org.scalatest.{Matchers, FunSuite}
+
+/** @version 1.0.0 */
+class QueenAttackTest extends FunSuite with Matchers {
+
+  private def create(x: Int, y: Int): Queen = {
+    Queen.create(x, y) match {
+      case Some(q) => q
+      case None => fail("Error creating queen")
+    }
+  }
+
+  test("queen with a valid position") {
+    Queen.create(2,2) should be (Some(Queen(2,2)))
+  }
+
+  test("queen must have positive rank") {
+    pending
+    Queen.create(-2,2) should be (None)
+  }
+
+  test("queen must have rank on board") {
+    pending
+    Queen.create(8,4) should be (None)
+  }
+
+  test("queen must have positive file") {
+    pending
+    Queen.create(2,-2) should be (None)
+  }
+
+  test("queen must have file on board") {
+    pending
+    Queen.create(4,8) should be (None)
+  }
+
+  test("can not attack") {
+    pending
+    QueenAttack.canAttack(create(2,4), create(6,6)) should be (false)
+  }
+
+  test("can attack on same rank") {
+    pending
+    QueenAttack.canAttack(create(2,4), create(2,6)) should be (true)
+  }
+
+  test("can attack on same file") {
+    pending
+    QueenAttack.canAttack(create(4,5), create(2,5)) should be (true)
+  }
+
+  test("can attack on first diagonal") {
+    pending
+    QueenAttack.canAttack(create(2,2), create(0,4)) should be (true)
+  }
+
+  test("can attack on second diagonal") {
+    pending
+    QueenAttack.canAttack(create(2,2), create(3,1)) should be (true)
+  }
+
+  test("can attack on third diagonal") {
+    pending
+    QueenAttack.canAttack(create(2,2), create(1,1)) should be (true)
+  }
+
+  test("can attack on fourth diagonal") {
+    pending
+    QueenAttack.canAttack(create(2,2), create(5,5)) should be (true)
+  }
+}

exercises/queen-attack/src/test/scala/QueenAttackTest.scala

@@ -0,0 +1,79 @@
+import java.io.File
+
+import testgen.TestSuiteBuilder._
+import testgen._
+
+object QueenAttackTestGenerator {
+  def main(args: Array[String]): Unit = {
+    val file = new File("src/main/resources/queen-attack.json")
+
+    def getPositionArgs(queenMap: Map[String, String]): String =
+      queenMap("position").stripPrefix("(").stripSuffix(")")
+
+    def getQueen(labeledTest: LabeledTest): Map[String, String] = {
+      labeledTest.result("queen").
+        asInstanceOf[Map[String, String]]
+    }
+
+    def getWhiteQueen(labeledTest: LabeledTest): Map[String, String] = {
+      labeledTest.result("white_queen").
+        asInstanceOf[Map[String, String]]
+    }
+
+    def getBlackQueen(labeledTest: LabeledTest): Map[String, String] = {
+      labeledTest.result("black_queen").
+        asInstanceOf[Map[String, String]]
+    }
+
+    def getCanAttackArgs(labeledTest: LabeledTest): String = {
+      val whiteQueenArgs = getPositionArgs(getWhiteQueen(labeledTest))
+      val blackQueenArgs = getPositionArgs(getBlackQueen(labeledTest))
+      s"create($whiteQueenArgs), create($blackQueenArgs)"
+    }
+
+    def toCreateExpected(labeledTest: LabeledTest): String = {
+      val expected = labeledTest.expected
+      expected match {
+        case Right(-1) => s"None"
+        case Right(0) =>
+          val args = getPositionArgs(getQueen(labeledTest))
+          s"Some(Queen($args))"
+        case _ => throw new IllegalStateException
+      }
+    }
+
+
+    def fromLabeledTest(argNames: String*): ToTestCaseData =
+      withLabeledTest { sut =>
+        labeledTest =>
+          val property = labeledTest.property
+          val (clazz, args, expected) = property match {
+            case "create" =>
+              ("Queen",
+                getPositionArgs(getQueen(labeledTest)),
+                toCreateExpected(labeledTest))
+            case "canAttack" =>
+              ("QueenAttack",
+                getCanAttackArgs(labeledTest),
+                labeledTest.expected.fold(_ => "false", _.toString))
+            case _ => throw new IllegalStateException()
+          }
+          val sutCall = s"""$clazz.$property($args)"""
+          TestCaseData(labeledTest.description, sutCall, expected)
+      }
+
+    val code =
+      TestSuiteBuilder.build(file, fromLabeledTest(),
+        Seq(),
+        Seq(" private def create(x: Int, y: Int): Queen = {",
+          "    Queen.create(x, y) match {",
+          "      case Some(q) => q",
+          "      case None => fail(\"Error creating queen\")",
+          "    }",
+          "  }"))
+
+    println(s"-------------")
+    println(code)
+    println(s"-------------")
+  }
+}