ruby - how "expect(9).to be > 6" is valid expression? -


in rspec doc, found looking strange like

expect(9).to > 6

i have no idea how above expression can valid.

how can > come this? search rspec github, found no clue.

it's equivalent to

expect(9).to(be > 6)

which equivalent to:

expect(9).to(be.>(6))

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