Source classes for umldoc tests

testdata/umldoc-src/gr/spinellis/invoice/Customer.java

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+package gr.spinellis.invoice;
+
+
+public class Customer {
+    String name;
+}

testdata/umldoc-src/gr/spinellis/invoice/Invoice.java

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+package gr.spinellis.invoice;
+
+import gr.spinellis.product.Product;
+
+import java.util.Date;
+
+public class Invoice {
+    public double total;
+    public InvoiceItem[] items;
+    public Customer customer;
+    public Date invoiceDate;
+    
+    public void addItem(Product p, int quantity) {};
+}

testdata/umldoc-src/gr/spinellis/invoice/InvoiceItem.java

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+package gr.spinellis.invoice;
+
+import gr.spinellis.product.Product;
+
+public class InvoiceItem {
+
+    public Product product;
+    public int quantity;
+}

testdata/umldoc-src/gr/spinellis/product/Category.java

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+package gr.spinellis.product;
+
+import java.util.List;
+
+public class Category {
+
+    public String name;
+    List<Product> products;
+}

testdata/umldoc-src/gr/spinellis/product/Product.java

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+package gr.spinellis.product;
+
+public class Product {
+
+    public String name;
+    public int stock;
+    public double price;
+    public Category category;
+
+}