for these tests to make sense, a set of specially crafted fonts need to be installed on your system. the glyphs in these fonts are taken from Monster_Boxes (licensed under the open font license), since it's a face that stands out. the fonts contain glyphs for the characters a-f, but the actual glyphs are different: MonsterN.ttf use the glyphs (a-f) "normal", MonsterB.ttf "bold--", MonsterI.ttf "italic" and MonsterBI.ttf "bolita". this makes it possible to see which font is actually used, and since the fonts all have the same weight and style it's also possible to see whether weights and styles are being synthesized. the family name for these fonts is MonsterT, that hopefully shouldn't clash with any regular system fonts.
the fonts can be found here
if the fonts are recognized on your system, the four paragraphs below should read normal, bold--, italic and bolita. this represents the normal, bold, italic and bold + italic fonts used in these tests.
abcdef
abcdef
abcdef
abcdef