Ignore style definitions using a style ID that has already been used

1 files changed, 40 insertions, 0 deletions

diff --git a/src/test/java/org/zwobble/mammoth/tests/docx/StylesXmlTests.java b/src/test/java/org/zwobble/mammoth/tests/docx/StylesXmlTests.java
index 89a7d1a..c6ccc82 100644
--- a/src/test/java/org/zwobble/mammoth/tests/docx/StylesXmlTests.java
+++ b/src/test/java/org/zwobble/mammoth/tests/docx/StylesXmlTests.java
@@ -118,6 +118,46 @@ public class StylesXmlTests {
         assertEquals(Optional.of("42"), styles.findNumberingStyleById("List1").get().getNumId());
     }
 
+    @Test
+    public void whenMultipleNonNumberingStyleElementsHaveSameStyleIdThenOnlyFirstElementIsUsed() {
+        XmlElement element = element("w:styles", list(
+            element("w:style", map("w:type", "table", "w:styleId", "TableNormal"), list(
+                nameElement("Normal Table")
+            )),
+            element("w:style", map("w:type", "table", "w:styleId", "TableNormal"), list(
+                nameElement("Table Normal")
+            ))
+        ));
+
+        Styles styles = readStylesXmlElement(element);
+
+        assertEquals(Optional.of("Normal Table"), styles.findTableStyleById("TableNormal").get().getName());
+    }
+
+    @Test
+    public void whenMultipleNumberingStyleElementsHaveSameStyleIdThenOnlyFirstElementIsUsed() {
+        XmlElement element = element("w:styles", list(
+            element("w:style", map("w:type", "numbering", "w:styleId", "List1"), list(
+                element("w:pPr", list(
+                    element("w:numPr", list(
+                        element("w:numId", map("w:val", "42"))
+                    ))
+                ))
+            )),
+            element("w:style", map("w:type", "numbering", "w:styleId", "List1"), list(
+                element("w:pPr", list(
+                    element("w:numPr", list(
+                        element("w:numId", map("w:val", "43"))
+                    ))
+                ))
+            ))
+        ));
+
+        Styles styles = readStylesXmlElement(element);
+
+        assertEquals(Optional.of("42"), styles.findNumberingStyleById("List1").get().getNumId());
+    }
+
     private XmlElement nameElement(String name) {
         return element("w:name", map("w:val", name));
     }