1 files changed, 147 insertions, 0 deletions
diff --git a/spec/board_spec.rb b/spec/board_spec.rb
new file mode 100644
index 0000000..70caa81
--- /dev/null
+++ b/spec/board_spec.rb
@@ -0,0 +1,147 @@
+require 'spec_helper'
+require 'board'
+
+describe Board do
+  before do
+    @board = Board.new
+  end
+  
+  it 'starts with a grid of dots' do
+    @board.instance_variable_get('@board').must_equal [
+      ['.', '.', '.'],
+      ['.', '.', '.'],
+      ['.', '.', '.']
+    ]
+  end
+  
+  describe '#render' do
+    it 'must be a grid' do
+      @board.render.must_equal <<EOF
+...
+...
+...
+EOF
+    end
+    
+    it 'must be the correct board' do
+      @board.instance_variable_set(:@board, [
+        ['.', 'X', 'O'],
+        ['X', '.', '.'],
+        ['.', '.', '.'],
+      ])
+      @board.render.must_equal <<EOF
+.XO
+X..
+...
+EOF
+    end
+  end
+  
+  describe '#transform_coordinates' do
+    it 'converts string coordinates to an array' do
+      @board.transform_coordinates('0,4').must_equal [0, 4]
+    end
+    
+    it "returns nil if coordinates don't match the format" do
+      @board.transform_coordinates('4').must_be_nil
+      @board.transform_coordinates('4 2').must_be_nil
+      @board.transform_coordinates('booyakacha').must_be_nil
+      @board.transform_coordinates('booya,kacha').must_be_nil
+    end
+  end
+  
+  describe '#update_cell' do
+    it 'updates a given cell with a given value' do
+      value = 'X'
+      @board.update_cell(1, 2, value)
+      @board.instance_variable_get(:@board)[1][2].must_equal value
+    end
+  end
+  
+  describe '#winner?' do
+    before do
+      @board = Board.new
+    end
+    
+    it 'must be nil when no player has won' do
+      @board.winner?.must_be_nil
+    end
+    
+    it 'must be the winning player' do
+    end
+    
+    it 'counts horizontal matches as wins' do
+      @board.instance_variable_set(:@board, [
+        ['X', 'X', 'X'],
+        ['X', 'O', 'O'],
+        ['O', 'X', 'O'],
+      ])
+      @board.winner?.must_equal 'X'
+      
+      @board.instance_variable_set(:@board, [
+        ['X', 'O', 'X'],
+        ['O', 'O', 'O'],
+        ['O', 'X', 'X'],
+      ])
+      @board.winner?.must_equal 'O'
+      
+      @board.instance_variable_set(:@board, [
+        ['O', 'X', 'X'],
+        ['X', 'O', 'X'],
+        ['O', 'O', 'O'],
+      ])
+      @board.winner?.must_equal 'O'
+    end
+    
+    it 'counts vertical matches as wins' do
+      @board.instance_variable_set(:@board, [
+        ['X', 'O', 'X'],
+        ['X', 'O', 'O'],
+        ['X', 'X', 'O'],
+      ])
+      @board.winner?.must_equal 'X'
+      
+      @board.instance_variable_set(:@board, [
+        ['X', 'O', 'X'],
+        ['X', 'O', 'O'],
+        ['O', 'O', 'X'],
+      ])
+      @board.winner?.must_equal 'O'
+      
+      @board.instance_variable_set(:@board, [
+        ['O', 'X', 'X'],
+        ['X', 'O', 'X'],
+        ['O', 'O', 'X'],
+      ])
+      @board.winner?.must_equal 'X'
+    end
+    
+    it 'counts diagonal matches as wins' do
+      @board.instance_variable_set(:@board, [
+        ['O', 'X', 'X'],
+        ['X', 'O', 'O'],
+        ['O', 'X', 'O'],
+      ])
+      @board.winner?.must_equal 'O'
+      
+      @board.instance_variable_set(:@board, [
+        ['X', 'O', 'X'],
+        ['O', 'X', 'O'],
+        ['O', 'X', 'X'],
+      ])
+      @board.winner?.must_equal 'X'
+    end
+  end
+  
+  describe '#array_items_equal' do
+    it 'is true when all elements in the array are equal' do
+      Board.new.send(:array_items_equal,
+        ['X', 'X', 'X', 'X', 'X', 'X', 'X']).must_equal true
+    end
+    
+    it 'is false when any element is not equal to the rest' do
+      Board.new.send(:array_items_equal,
+        ['X', 'O', 'X', 'X', 'X', 'X', 'X']).must_equal false
+    end
+  end
+end