Ahem 2016 test page
v2 (Todd Fahrner and Paul Nelson) Ahemv2.ttf, 12480 bytes
"X" (U+58): Path has full ascent and full descent; glyph == X
Most other US-ASCII characters in the font have the same glyph as X.
"p" (U+70): Path has 0 ascent but full descent; glyph == p
A rectangle exactly 0.2em high, 1em wide, and aligned so that its top is flush with the baseline.
"É" (U+C9): Path has 0 descent but full ascent; glyph == É
A rectangle exactly 0.8em high, 1em wide, and aligned so that its bottom is flush with the baseline.
" " (U+20): No path but full advance; glyph == H H
A transparent space exactly 1em high and wide.
Non-breaking space (U+A0): No path but full advance; glyph == H H
v3 (Sergey Malkin) ahem3.ttf, 13884 bytes, July 26th 2016
En space (U+2002): No path and half advance; glyph == H H
Em space (U+2003): No path but full advance; glyph == H H
Three-per-em space (U+2004): No path and one third advance; glyph == H H
Four-per-em space (U+2005): No path and one quarter advance; glyph == H H
Six-per-em space (U+2006): No path and one sixth advance; glyph == H H
Thin space (U+2009): No path and one fifth advance; glyph == H H
Hair space (U+200A): No path and one tenth advance; glyph == H H
Zero width space (U+200B): No path and no advance; glyph == HH
Zero width non-joiner (U+200C): No path and no advance; glyph == HH
Zero width joiner (U+200D): No path and no advance; glyph == HH
Ideographic space (U+3000): No path but full advance; glyph == H H
Zero-width non-breaking space (U+FEFF): No path and 0 advance; glyph == HH
v4.1 or Ahem_Myles.ttf, 21768 bytes, August 9th 2016
Greek capital letter Chi "Χ" (U+3A7): Thin horizontal stripe and full advance; glyph == HΧH
"横" (U+6A2A): Thin horizontal stripe and full advance; glyph == H横H
Greek capital letter Upsilon "Υ" (U+3A5): Thin vertical stripe and full advance; glyph == HΥH
"纵" (U+7EB5): Thin vertical stripe and full advance; glyph == H纵H
"一" (U+4E00): 1em black square; 一
"二" (U+4E8C): 1em black square; 二
"三" (U+4E09): 1em black square; 三
"四" (U+56DB): 1em black square; 四
"五" (U+4E94): 1em black square; 五
"六" (U+516D): 1em black square; 六
"七" (U+4E03): 1em black square; 七
"八" (U+516B): 1em black square; 八
"九" (U+4E5D): 1em black square; 九
"十" (U+5341): 1em black square; 十
"〇" (U+3007): 1em black square; 〇
"囗" (U+56D7): 1em black square; 囗
"火" (U+706B): 1em black square; 火
"水" (U+6C34): 1em black square; 水
"木" (U+6728): 1em black square; 木
"金" (U+91D1): 1em black square; 金
"土" (U+571F): 1em black square; 土
v4.2 or Ahem_Myles2.ttf, 22572 bytes, August 15th 2016
"橫" (U+6A6B): Thin horizontal stripe and full advance; H橫H
"縦" (U+7E26): Thin vertical stripe and full advance; H縦H
"縱" (U+7E31): Thin vertical stripe and full advance; H縱H
