add test for bsearch_variants.py#527
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bhhhoang171 wants to merge 1 commit intowangzheng0822:masterfrom
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add test for bsearch_variants.py#527bhhhoang171 wants to merge 1 commit intowangzheng0822:masterfrom
bhhhoang171 wants to merge 1 commit intowangzheng0822:masterfrom