You will need a font that allows you to distinguish between Arabic and Hebrew.
rtl context, ltr p
Test passes if:
A. The visual order of words is Arabic (مكتب), English (W3C), Hebrew (הישראלי)
B. The text is left-aligned.
مكتب W3C הישראלי
Assertion: When dir="rtl" is added to a paragraph in a rtl context, (a) directional runs in a paragraph are ordered left-to-right, (b) the paragraph is left-aligned on the page.
The order of directional runs in memory is: Arabic (مكتب) English (W3C) Hebrew (הישראלי).
= means you should check that the test and reference graphic look the same, except for font differences and cursive joining behavior. If they are different, use the addition instructional text to check for differences that are significant to the test.