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import unittest
import algorithm
suite "product":
test "empty input":
check product[int](newSeq[seq[int]]()) == newSeq[seq[int]]()
test "bit more empty input":
check product[int](@[newSeq[int](), @[], @[]]) == newSeq[seq[int]]()
test "a simple case of one element":
check product(@[@[1,2]]) == @[@[1,2]]
test "two elements":
check product(@[@[1,2], @[3,4]]) == @[@[2,4],@[1,4],@[2,3],@[1,3]]
test "three elements":
check product(@[@[1,2], @[3,4], @[5,6]]) == @[@[2,4,6],@[1,4,6],@[2,3,6],@[1,3,6], @[2,4,5],@[1,4,5],@[2,3,5],@[1,3,5]]
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