remove test steady state interval (#920)

Co-authored-by: LasNikas <niklas.nehe@web.de>

Author: LasNikas

test/examples/examples_fluid.jl

@@ -368,21 +368,6 @@
         @test sol.retcode == ReturnCode.Terminated
     end
 
-    @trixi_testset "fluid/pipe_flow_2d.jl - steady state reached (`interval`)" begin
-        steady_state_reached = SteadyStateReachedCallback(; interval=1, interval_size=5,
-                                                          reltol=1e-3)
-        @trixi_test_nowarn trixi_include(@__MODULE__,
-                                         joinpath(examples_dir(), "fluid",
-                                                  "pipe_flow_2d.jl"),
-                                         open_boundary_model=BoundaryModelCharacteristicsLastiwka(),
-                                         extra_callback=steady_state_reached, dtmax=2e-3,
-                                         tspan=(0.0, 1.5), viscosity_boundary=nothing)
-
-        # Make sure that the simulation is terminated after a reasonable amount of time
-        @test 0.1 < sol.t[end] < 1.0
-        @test sol.retcode == ReturnCode.Terminated
-    end
-
     @trixi_testset "fluid/pipe_flow_3d.jl" begin
         @trixi_test_nowarn trixi_include(@__MODULE__,
                                          joinpath(examples_dir(), "fluid",

test/examples/gpu.jl

@@ -389,26 +389,6 @@ end
             @test 0.1 < sol.t[end] < 1.0
             @test sol.retcode == ReturnCode.Terminated
         end
-
-        @trixi_testset "fluid/pipe_flow_2d.jl - steady state reached (`interval`)" begin
-            steady_state_reached = SteadyStateReachedCallback(; interval=1,
-                                                              interval_size=5,
-                                                              reltol=1.0f-3)
-            @trixi_test_nowarn trixi_include_changeprecision(Float32, @__MODULE__,
-                                                             joinpath(examples_dir(),
-                                                                      "fluid",
-                                                                      "pipe_flow_2d.jl"),
-                                                             extra_callback=steady_state_reached,
-                                                             open_boundary_model=BoundaryModelCharacteristicsLastiwka(),
-                                                             dtmax=2.0f-3,
-                                                             tspan=(0.0f0, 1.5f0),
-                                                             parallelization_backend=Main.parallelization_backend,
-                                                             viscosity_boundary=nothing)
-
-            # Make sure that the simulation is terminated after a reasonable amount of time
-            @test 0.1 < sol.t[end] < 1.0
-            @test sol.retcode == ReturnCode.Terminated
-        end
     end
 
     @testset verbose=true "Structure" begin