1 files changed, 34 insertions, 0 deletions
diff --git a/test/lib/dice_test.rb b/test/lib/dice_test.rb
new file mode 100644
index 0000000..1f36f30
--- /dev/null
+++ b/test/lib/dice_test.rb
@@ -0,0 +1,34 @@
+require "test_helper"
+
+class DiceTest < ActiveSupport::TestCase
+  test "rolls fomula" do
+    result = Dice.roll_formula("4d6+2")
+
+    assert_equal 4, result.rolls.count
+    assert_equal 6, result.rolls.first&.sides
+  end
+
+  test "rolls single die" do
+    result = Dice.roll(10)
+
+    assert_equal 1, result.rolls.count
+    assert_equal 10, result.rolls.first&.sides
+  end
+
+  test "increases sides below max" do
+    original_result = Dice::Result.new
+    original_result.add_roll Dice::Roll.new(6, 5)
+    original_result.add_roll Dice::Roll.new(6, 6)
+    original_result.add_roll Dice::Roll.new(6, 2)
+
+    new_result = original_result.dup
+
+    assert_equal 13, new_result.total
+    new_result.increase_sides_below_max(6, 1)
+    assert_equal 15, new_result.total
+
+    new_result.rolls.each_with_index do |roll, index|
+      assert_equal roll, original_result.rolls[index]
+    end
+  end
+end