update tests

Author: heltonmc

test/airy_test.jl

@@ -2,7 +2,7 @@
 # these are prone to some cancellation as they are indirectly calculated from relations to bessel functions
 # this is amplified for negative arguments
 # the implementations provided by SpecialFunctions.jl suffer from same inaccuracies
-for x in [0.0; rand(10000)*100]
+for x in [0.0; 1e-17:0.1:100.0]
     @test isapprox(airyai(x), SpecialFunctions.airyai(x), rtol=1e-12)
     @test isapprox(airyai(-x), SpecialFunctions.airyai(-x), rtol=1e-9)