Rafforza i requisiti password con regole di complessità di mercato.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/spec/models/password_complexity_spec.rb

@@ -0,0 +1,36 @@
+require "rails_helper"
+
+RSpec.describe PasswordComplexity do
+  describe ".violation" do
+    it "accepts a password with 3 character classes" do
+      expect(described_class.violation("NewPass123")).to be_nil
+    end
+
+    it "accepts symbols instead of one letter class" do
+      expect(described_class.violation("newpass1!")).to be_nil
+    end
+
+    it "rejects passwords that are too short" do
+      expect(described_class.violation("Ab1!")).to eq(:too_short)
+    end
+
+    it "rejects passwords with fewer than 3 classes" do
+      expect(described_class.violation("password123")).to eq(:too_weak)
+      expect(described_class.violation("PASSWORD123")).to eq(:too_weak)
+      expect(described_class.violation("Password")).to eq(:too_weak)
+    end
+  end
+
+  describe "User validation" do
+    it "blocks weak passwords on create" do
+      user = User.new(email: "weak@example.com", name: "Weak", password: "password123", role: "coach")
+      expect(user).not_to be_valid
+      expect(user.errors[:password]).to be_present
+    end
+
+    it "allows strong passwords on create" do
+      user = User.new(email: "strong@example.com", name: "Strong", password: "NewPass123", role: "coach")
+      expect(user).to be_valid
+    end
+  end
+end