You need to check that the intended format was created successfully: A4-landscape, Letter-portrait or a special format for a poster? You think testing such simple thing is a waste of time? But have you ever printed a “LETTER”-formatted document on an “A4”-printer? It is possible, but... So, PDFUnit provides the following test method:

Deshalb stellt PDFUnit eine Testmethode für Formattests zur Verfügung:

PDFUnit provides one flexible method to test document formats:

// Simple tests for page formats:
.hasFormat(..)

You can use predefined constants to verify the format of conventional PDF documents, each page having the same size:

import static com.pdfunit.Constants.*;
...
@Test
public void hasFormat_A4Landscape() throws Exception {
  String filename = "documentUnderTest.pdf";
  
  AssertThat.document(filename)
            .hasFormat(A4_LANDSCAPE)    
  ;
}

import static com.pdfunit.Constants.*;
...
@Test
public void hasFormat_LetterPortrait() throws Exception {
  String filename = "documentUnderTest.pdf";
  
  AssertThat.document(filename)
            .hasFormat(LETTER_PORTRAIT) 
  ;
}

You can also verify individual formats:

@Test
public void hasFormat_FreeFormat_1117x836_mm() throws Exception {
  String filename = "documentUnderTest.pdf";
  int heightMM = 1117;
  int widthMM = 863;
  DocumentFormat formatMM = new DocumentFormatMillis(widthMM, heightMM);
  
  AssertThat.document(filename)
            .hasFormat(formatMM)
  ;
}

It is recommended to use the unit millimeters for tests with document formats, although a class DocumentFormatPoints exists. When the unit points is used, the real size of a page depends on the resolution. Two documents with the same number of points can have different page sizes if one document has a resolution of 72 DPI (72 dots per inch) and the other has a resolution of 150 DPI.

All size values are of type integer. If you want to check formats having tenths of a millimeter, round the values. Please note that PDFUnit uses the tolerance defined in DIN 476 when comparing two size values.

Information about paper formats can be found at http://en.wikipedia.org/wiki/Paper_size. PDFUnit uses the stricter tolerances of DIN 476 when comparing page sizes, although the ISO 216 standard defines larger tolerances.

A document with different page sizes can also be checked. The next example checks the format of page 3 only:

@Test 
public void hasFormatOnPage3() throws Exception {
  String filename = "documentUnderTest.pdf";
  PagesToUse page3 = PagesToUse.getPage(3);
  
  AssertThat.document(filename)
            .restrictedTo(page3)
            .hasFormat(A5_PORTRAIT)
  ;
}

The restriction of tests to individual pages or page ranges is described in chapter 13.2: “Page Selection”: