feat: entity definitions — player classes, monsters, items

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

entity/player_test.go

@@ -0,0 +1,53 @@
+package entity
+
+import "testing"
+
+func TestNewPlayer(t *testing.T) {
+	p := NewPlayer("testuser", ClassWarrior)
+	if p.HP != 120 || p.MaxHP != 120 {
+		t.Errorf("Warrior HP: got %d, want 120", p.HP)
+	}
+	if p.ATK != 12 {
+		t.Errorf("Warrior ATK: got %d, want 12", p.ATK)
+	}
+	if p.DEF != 8 {
+		t.Errorf("Warrior DEF: got %d, want 8", p.DEF)
+	}
+	if p.Gold != 0 {
+		t.Errorf("Initial gold: got %d, want 0", p.Gold)
+	}
+}
+
+func TestAllClasses(t *testing.T) {
+	tests := []struct {
+		class    Class
+		hp, atk, def int
+	}{
+		{ClassWarrior, 120, 12, 8},
+		{ClassMage, 70, 20, 3},
+		{ClassHealer, 90, 8, 5},
+		{ClassRogue, 85, 15, 4},
+	}
+	for _, tt := range tests {
+		p := NewPlayer("test", tt.class)
+		if p.HP != tt.hp || p.ATK != tt.atk || p.DEF != tt.def {
+			t.Errorf("Class %v: got HP=%d ATK=%d DEF=%d, want HP=%d ATK=%d DEF=%d",
+				tt.class, p.HP, p.ATK, p.DEF, tt.hp, tt.atk, tt.def)
+		}
+	}
+}
+
+func TestPlayerTakeDamage(t *testing.T) {
+	p := NewPlayer("test", ClassWarrior)
+	p.TakeDamage(30)
+	if p.HP != 90 {
+		t.Errorf("HP after 30 dmg: got %d, want 90", p.HP)
+	}
+	p.TakeDamage(200)
+	if p.HP != 0 {
+		t.Errorf("HP should not go below 0: got %d", p.HP)
+	}
+	if !p.IsDead() {
+		t.Error("Player should be dead")
+	}
+}