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## 4.5. Comparing Document Properties

You might want to compare the title or other document information of two PDF documents. Use the following methods:

    // Comparing document properties:

    .haveSameAuthor()
    .haveSameCreationDate()
    .haveSameCreator()
    .haveSameKeywords()
    .haveSameLanguageInfo()
    .haveSameModificationDate()
    .haveSameProducer()
    .haveSameProperties()
    .haveSameProperty(String)
    .haveSameSubject()
    .haveSameTitle()

As an example of comparing any document property we compare the “author”:

    @Test
    public void haveSameAuthor() throws Exception {
      String filenameTest = "documentUnderTest.pdf";
      String filenameReference = "reference.pdf";

      AssertThat.document(filenameTest)
                .and(filenameReference)
                .haveSameAuthor()
      ;
    }

Custom properties can be compared using the method `haveSameProperty(..)`:

    @Test
    public void haveSameCustomProperty() throws Exception {
      String filenameTest = "documentUnderTest.pdf";
      String filenameReference = "reference.pdf";

      AssertThat.document(filenameTest)
                .and(filenameReference)
                .haveSameProperty("Company")
                .haveSameProperty("SourceModified")
      ;
    }

Of course, you can use this method to compare all standard properties.

If you want to compare all properties of two documents, you can use the general method `haveSameProperties()`:

    @Test
    public void haveSameProperties_AllProperties() throws Exception {
      String filenameTest = "documentUnderTest.pdf";
      String filenameReference = "reference.pdf";

      AssertThat.document(filenameTest)
                .and(filenameReference)
                .haveSameProperties()
      ;
    }

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