Add money and head handling functions

Created types to manage the cannonical coinage of DnD.
First pass at computing computing values for heads.

1 files changed, 90 insertions, 0 deletions

diff --git a/economy/coins_test.go b/economy/coins_test.go
new file mode 100644
index 0000000..d318fbe
--- /dev/null
+++ b/economy/coins_test.go
@@ -0,0 +1,90 @@
+package economy_test
+
+import (
+	"nonsense-time/economy"
+	"testing"
+)
+
+func assert[T comparable](t *testing.T, expected T, actual T) bool {
+	if expected != actual {
+		t.Logf("expected %v != actual %v\n", expected, actual)
+		t.Fail()
+		return false
+	}
+
+	return true
+}
+
+func TestMoneyAdd(t *testing.T) {
+	a := economy.Money{0, -1, -2, -3, -4}
+	b := economy.Money{1, 2, 3, 4, 5}
+	a.Add(b)
+
+	pass := true
+	pass = pass && assert(t, 1, a.Copper)
+	pass = pass && assert(t, 1, a.Silver)
+	pass = pass && assert(t, 1, a.Electrum)
+	pass = pass && assert(t, 1, a.Gold)
+	pass = pass && assert(t, 1, a.Platinum)
+	if !pass {
+		t.Logf("%+v\n", a)
+	}
+
+}
+
+func TestMoneySubtract(t *testing.T) {
+	a := economy.Money{1, 2, 3, 4, 5}
+	b := economy.Money{0, 1, 2, 3, 4}
+
+	a.Subtract(b)
+
+	pass := true
+	pass = pass && assert(t, 1, a.Copper)
+	pass = pass && assert(t, 1, a.Silver)
+	pass = pass && assert(t, 1, a.Electrum)
+	pass = pass && assert(t, 1, a.Gold)
+	pass = pass && assert(t, 1, a.Platinum)
+	if !pass {
+		t.Logf("%+v\n", a)
+	}
+}
+
+func TestMoneyMult(t *testing.T) {
+	a := economy.Money{1, 2, 3, 5, 7}
+	b := economy.Money{11, 13, 17, 19, 23}
+
+	t.Log("Testing positive multiplication")
+	a.Multiply(b)
+
+	pass := true
+	pass = pass && assert(t, 11, a.Copper)
+	pass = pass && assert(t, 26, a.Silver)
+	pass = pass && assert(t, 51, a.Electrum)
+	pass = pass && assert(t, 95, a.Gold)
+	pass = pass && assert(t, 161, a.Platinum)
+	if !pass {
+		t.Logf("%+v\n", a)
+	}
+}
+
+func TestMoneyValue(t *testing.T) {
+	a := economy.Money{1, 1, 1, 1, 1}
+
+	t.Log("Testing all positive coins")
+	if !assert(t, 1161, a.Value()) {
+		t.Log(a)
+	}
+
+	t.Log("Testing all negative coins")
+	a = economy.Money{-1, -1, -1, -1, -1}
+	if !assert(t, -1161, a.Value()) {
+		t.Log(a)
+	}
+
+	t.Log("Testing mixed coins")
+	a.Copper = 10
+	a.Electrum = 2
+	if !assert(t, -1000, a.Value()) {
+		t.Log(a)
+	}
+}