From b0b34adbd86fc778923a766273c145cc657918cd Mon Sep 17 00:00:00 2001
From: xengineering <me@xengineering.eu>
Date: Tue, 3 Sep 2024 20:24:42 +0200
Subject: finance: Add income.py

This is the minimal starting point to model financial income.
---
 finance/income.py      | 10 ++++++++++
 finance/test_income.py |  6 ++++++
 2 files changed, 16 insertions(+)
 create mode 100644 finance/income.py
 create mode 100644 finance/test_income.py

(limited to 'finance')

diff --git a/finance/income.py b/finance/income.py
new file mode 100644
index 0000000..12d5d4e
--- /dev/null
+++ b/finance/income.py
@@ -0,0 +1,10 @@
+import dataclasses
+
+
+@dataclasses.dataclass(kw_only=True, frozen=True)
+class Income:
+
+    amount: float
+
+    def integrate(self, delta_t: int) -> float:
+        return delta_t * self.amount
diff --git a/finance/test_income.py b/finance/test_income.py
new file mode 100644
index 0000000..21d42f7
--- /dev/null
+++ b/finance/test_income.py
@@ -0,0 +1,6 @@
+from finance import income
+
+
+def test_income_integration() -> None:
+    inc = income.Income(amount=3000.0)
+    assert inc.integrate(5) == 15000.0
-- 
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