✅ Board (pt.2)

Connect4/connect4_cli/connect4_cli/main.swift

@@ -3,7 +3,7 @@ import connect4_lib
 
 var status: Bool
 
-if var b = Board() {
+if var b = Board(withRows: 3, andWithCols: 3) {
     print(b)
     status = b.insertChip(from: 1, atCol: 1)
     print(b)

Connect4/connect4_lib/Sources/connect4_lib/Board.swift

@@ -9,7 +9,7 @@ public struct Board : CustomStringConvertible {
     var _grid: [[Int?]]
     
     public init?(withRows nbRows: Int = 6, andWithCols nbCols: Int = 7) {
-        guard(nbRows > 0 && nbCols > 0) else { return nil }
+        guard(nbRows >= 3 && nbCols >= 3) else { return nil }
         self.nbRows = nbRows
         self.nbCols = nbCols
         self._nbFree = nbRows * nbCols
@@ -22,10 +22,18 @@ public struct Board : CustomStringConvertible {
               && grid.allSatisfy{ $0.count == grid[0].count }) else { return nil }
         self.nbRows = grid.count
         self.nbCols = grid[0].count
-        self._nbFree = nbRows * nbCols
         self._grid = grid
+        var nbFree = self.nbRows * self.nbCols
+        for row in grid {
+            for tile in row {
+                if tile != nil {
+                    nbFree -= 1
+                }
+            }
+        }
+        self._nbFree = nbFree
     }
-
+    
     func isWithinBounds(_ row: Int, and col: Int) -> Bool {
         return 0 <= row && row < nbRows
             && 0 <= col && col < nbCols

Connect4/connect4_lib/Tests/connect4_libTests/BoardTest.swift

@@ -23,10 +23,12 @@ final class BoardTest: XCTestCase {
         expect(initBoardWithNbRows: 6, andNbCols: -9, shouldNotBeNil: false)
         expect(initBoardWithNbRows: 0, andNbCols: 7, shouldNotBeNil: false)
         expect(initBoardWithNbRows: 6, andNbCols: 0, shouldNotBeNil: false)
+        expect(initBoardWithNbRows: 6, andNbCols: 2, shouldNotBeNil: false)
+        expect(initBoardWithNbRows: 2, andNbCols: 4, shouldNotBeNil: false)
     }
     
     func testInitLoad() throws {
-        func expect(withBoard orig: [[Int?]], shouldNotBeNil: Bool) {
+        func expect(withGrid orig: [[Int?]], shouldNotBeNil: Bool) {
             let board = Board(withGrid: orig)
             if !shouldNotBeNil {
                 XCTAssertNil(board)
@@ -37,11 +39,29 @@ final class BoardTest: XCTestCase {
             XCTAssertEqual(orig.count, board?.nbRows)
         }
         
-        expect(withBoard: [[0, 1, 2], [0, 0, 0], [0, 0, 0]], shouldNotBeNil: true)
-        expect(withBoard: [], shouldNotBeNil: false)
-        expect(withBoard: [[], []], shouldNotBeNil: false)
-        expect(withBoard: [[0, 1], [0, 0]], shouldNotBeNil: false)
-        expect(withBoard: [[0, 1, 2], [0, 0, 0, 0]], shouldNotBeNil: false)
+        expect(withGrid: [[0, 1, 2], [0, 0, 0], [0, 0, 0]], shouldNotBeNil: true)
+        expect(withGrid: [], shouldNotBeNil: false)
+        expect(withGrid: [[], []], shouldNotBeNil: false)
+        expect(withGrid: [[0, 1], [0, 0]], shouldNotBeNil: false)
+        expect(withGrid: [[0, 1, 2], [0, 0, 0, 0]], shouldNotBeNil: false)
     }
     
+    func testIsFull() throws {
+        func expect(withGrid orig: [[Int?]], shouldNotBeFull: Bool) {
+            let board = Board(withGrid: orig)
+            if shouldNotBeFull {
+                XCTAssertFalse(board!.isFull())
+            } else {
+                XCTAssertTrue(board!.isFull())
+            }
+        }
+        
+        expect(withGrid: [[nil, 1, 2], [nil, nil, nil], [nil, nil, nil]], shouldNotBeFull: true)
+        expect(withGrid: [[1, 1, 2], [2, 2, 1], [2, 1, 2]], shouldNotBeFull: false)
+        var board = Board(withGrid: [[1, nil, 2], [2, 2, 1], [2, 1, 2]])
+        expect(withGrid: board!.grid, shouldNotBeFull: true)
+        if(board!.insertChip(from: 1, atCol: 1)) {
+            expect(withGrid: board!.grid, shouldNotBeFull: false)
+        }
+    }
 }