model (part 2) with JUnit testing

Author: Picalfer

.idea/gradle.xml

@@ -3,7 +3,7 @@ package com.example.tictactoemvc
 class TicTacToeGame {
 
     private var board: Array<Array<Mark>> = Array(ROWS) { Array(COLUMNS) { Mark.MARK_NONE } }
-    private var gameState: GameState = GameState.X_TURN
+    var gameState: GameState = GameState.X_TURN
 
     companion object {
         val ROWS = 3
@@ -44,4 +44,28 @@ class TicTacToeGame {
         }
         return ""
     }
+
+    fun pressButtonAt(row: Int, column: Int) {
+        if (row !in 0 until ROWS || column !in 0 until COLUMNS) {
+            return
+        }
+
+        if (board[row][column] != Mark.MARK_NONE) {
+            return
+        }
+
+        if (gameState == GameState.X_TURN) {
+            board[row][column] = Mark.MARK_X
+            gameState = GameState.O_TURN
+            checkForWin()
+        } else if (gameState == GameState.O_TURN) {
+            board[row][column] = Mark.MARK_0
+            gameState = GameState.X_TURN
+            checkForWin()
+        }
+    }
+
+    private fun checkForWin() {
+        //TODO
+    }
 }

.idea/vcs.xml

@@ -0,0 +1,55 @@
+package com.example.tictactoemvc
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * unit test for TicTacToe, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class TicTacToeGameTest {
+    @Test
+    fun boardIsReset() {
+        val game = TicTacToeGame()
+
+        for (row in 0 until TicTacToeGame.ROWS) {
+            for (column in 0 until TicTacToeGame.COLUMNS) {
+                assertEquals("", game.stringForButtonAt(row, column))
+            }
+        }
+
+        assertEquals(TicTacToeGame.GameState.X_TURN, game.gameState)
+    }
+
+    @Test
+    fun pressRegisters() {
+        val game = TicTacToeGame()
+
+        game.pressButtonAt(1, 2)
+        assertEquals("X", game.stringForButtonAt(1, 2))
+        assertEquals(TicTacToeGame.GameState.O_TURN, game.gameState)
+
+        game.pressButtonAt(2, 2)
+        assertEquals(TicTacToeGame.GameState.X_TURN, game.gameState)
+        assertEquals("O", game.stringForButtonAt(2, 2))
+
+        game.pressButtonAt(2, 2)
+        assertEquals("O", game.stringForButtonAt(2, 2))
+    }
+
+    @Test
+    fun pressOutOfBoundsIsIgnored() {
+        val game = TicTacToeGame()
+
+        assertEquals(TicTacToeGame.GameState.X_TURN, game.gameState)
+        game.pressButtonAt(-1, 0)
+        assertEquals(TicTacToeGame.GameState.X_TURN, game.gameState)
+
+        game.pressButtonAt(0, -1)
+        game.pressButtonAt(3, 0)
+        game.pressButtonAt(0, 3)
+        assertEquals(TicTacToeGame.GameState.X_TURN, game.gameState)
+    }
+}