Use StableRNGs to get inputs for calculus tests

Should prevent test failures due to changed random inputs between Julia versions.
mabarnes · Feb 5, 2025 · df8adc7 · df8adc7
1 parent 0b45e3e
commit df8adc7
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Showing 4 changed files with 5 additions and 1 deletion.
diff --git a/moment_kinetics/Project.toml b/moment_kinetics/Project.toml
@@ -32,6 +32,7 @@ SHA = "ea8e919c-243c-51af-8825-aaa63cd721ce"
 SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 SparseMatricesCSR = "a0a7dd2c-ebf4-11e9-1f05-cf50bc540ca1"
 SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
+StableRNGs = "860ef19b-820b-49d6-a774-d7a799459cd3"
 Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 StatsBase = "2913bbd2-ae8a-5f71-8c99-4fb6c76f3a91"
 SuiteSparse = "4607b0f0-06f3-5cda-b6b1-a6196a1729e9"
@@ -51,6 +52,7 @@ manufactured_solns_ext = ["Symbolics", "IfElse"]
 
 [compat]
 julia = "1.9.0"
+StableRNGs = "1"
 
 [extras]
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"

diff --git a/moment_kinetics/src/moment_kinetics.jl b/moment_kinetics/src/moment_kinetics.jl
@@ -5,6 +5,7 @@ module moment_kinetics
 export run_moment_kinetics
 
 using MPI
+using StableRNGs # Included so it can be imported conveniently into tests. Not used within moment_kinetics.
 using StatsBase
 
 # Include submodules from other source files

diff --git a/moment_kinetics/test/calculus_tests.jl b/moment_kinetics/test/calculus_tests.jl
@@ -71,7 +71,7 @@ function runtests()
             end
         end
 
-        rng = MersenneTwister(42)
+        rng = StableRNG(48)
 
         @testset "finite_difference derivatives (4 argument), periodic" verbose=false begin
             @testset "$nelement $ngrid" for nelement ∈ (1:5), ngrid ∈ (9:33)

diff --git a/moment_kinetics/test/setup.jl b/moment_kinetics/test/setup.jl
@@ -9,6 +9,7 @@ Included in test files as `include("setup.jl")`
 ##########################
 using Test: @testset, @test
 using moment_kinetics
+using moment_kinetics.StableRNGs
 
 module MKTestUtilities