The first subtest tests the arabic-form attribute on the glyph element, the second subtest is the same, but with glyphs for the letter khah. It should match the reference image.
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The first subtest must produce a 'downward triangle', a 'space', a 'square', a 'diamond' and then an 'upward triangle' in this order. Remembering that arabic text is right to left.
The second subtest must produce the isolated, initial, medial, final and glyphs of the letter khah. Again in the writing direction, from right to left.