Simplify `NaN` checks in tests.
Simplify `NaN` checks in tests.

tonyonodi/lodash,steelsojka/lodash,boneskull/lodash,msmorgan/lodash,beaugunderson/lodash,steelsojka/lodash,boneskull/lodash,rlugojr/lodash,tonyonodi/lodash,rlugojr/lodash,beaugunderson/lodash,msmorgan/lodash