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tests/test_portfolio.py

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+"""Tests for portfolio operations."""
+import sys
+from pathlib import Path
+
+# Add scripts to path for imports
+sys.path.insert(0, str(Path(__file__).parent.parent / "scripts"))
+
+import pytest
+from portfolio import load_portfolio, save_portfolio
+
+
+def test_load_portfolio_success(tmp_path, monkeypatch):
+    """Test loading valid portfolio CSV."""
+    portfolio_file = tmp_path / "portfolio.csv"
+    portfolio_file.write_text("symbol,name,category,notes,type\nAAPL,Apple,Tech,,\nTSLA,Tesla,Auto,,\n")
+    
+    monkeypatch.setattr("portfolio.PORTFOLIO_FILE", portfolio_file)
+    positions = load_portfolio()
+    
+    assert len(positions) == 2
+    assert positions[0]["symbol"] == "AAPL"
+    assert positions[0]["name"] == "Apple"
+    assert positions[1]["symbol"] == "TSLA"
+
+
+def test_load_portfolio_missing_file(tmp_path, monkeypatch):
+    """Test loading non-existent portfolio returns empty list."""
+    portfolio_file = tmp_path / "nonexistent.csv"
+    monkeypatch.setattr("portfolio.PORTFOLIO_FILE", portfolio_file)
+    
+    positions = load_portfolio()
+    assert positions == []
+
+
+def test_save_portfolio(tmp_path, monkeypatch):
+    """Test saving portfolio to CSV."""
+    portfolio_file = tmp_path / "portfolio.csv"
+    monkeypatch.setattr("portfolio.PORTFOLIO_FILE", portfolio_file)
+    
+    positions = [
+        {"symbol": "AAPL", "name": "Apple", "category": "Tech", "notes": "", "type": "stock"},
+        {"symbol": "MSFT", "name": "Microsoft", "category": "Tech", "notes": "", "type": "stock"}
+    ]
+    save_portfolio(positions)
+    
+    content = portfolio_file.read_text()
+    assert "symbol,name,category,notes,type" in content
+    assert "AAPL" in content
+    assert "MSFT" in content
+
+
+def test_save_empty_portfolio(tmp_path, monkeypatch):
+    """Test saving empty portfolio creates header."""
+    portfolio_file = tmp_path / "portfolio.csv"
+    monkeypatch.setattr("portfolio.PORTFOLIO_FILE", portfolio_file)
+    
+    save_portfolio([])
+    
+    content = portfolio_file.read_text()
+    assert content == "symbol,name,category,notes,type\n"
+
+
+def test_load_portfolio_preserves_fields(tmp_path, monkeypatch):
+    """Test loading portfolio preserves all fields."""
+    portfolio_file = tmp_path / "portfolio.csv"
+    portfolio_file.write_text("symbol,name,category,notes,type\nAAPL,Apple Inc,Tech,Core holding,stock\n")
+    monkeypatch.setattr("portfolio.PORTFOLIO_FILE", portfolio_file)
+    
+    positions = load_portfolio()
+    
+    assert len(positions) == 1
+    assert positions[0]["symbol"] == "AAPL"
+    assert positions[0]["name"] == "Apple Inc"
+    assert positions[0]["category"] == "Tech"
+    assert positions[0]["notes"] == "Core holding"
+    assert positions[0]["type"] == "stock"