Add a test for solve!

Author: kellertuer

test/newton.jl

@@ -65,4 +65,7 @@ end
     solution2 = solve(problem, algorithm2)
     @test solution2 ≈ sqrt(a)
     @test abs(solution2 - sqrt(a)) < abs(solution1 - sqrt(a))
+    state3 = initialize_state(problem, algorithm2)
+    solve!(problem, algorithm2, state3)
+    @test state3.iterate == solution2
 end

test/runtests.jl

@@ -4,19 +4,21 @@ using SafeTestsets
 using AlgorithmsInterface
 using Dates
 
-@safetestset "Newton" begin
-    include("newton.jl")
-end
+@safetestset "AlgorithmsInterface.jl" begin
+    @safetestset "Newton" begin
+        include("newton.jl")
+    end
 
-@safetestset "Stopping Criteria" begin
-    include("stopping_criterion.jl")
-end
+    @safetestset "Stopping Criteria" begin
+        include("stopping_criterion.jl")
+    end
 
-@safetestset "Logging Infrastructure" begin
-    include("logging.jl")
-end
+    @safetestset "Logging Infrastructure" begin
+        include("logging.jl")
+    end
 
-@safetestset "Aqua" begin
-    using AlgorithmsInterface, Aqua
-    Aqua.test_all(AlgorithmsInterface)
-end
+    @safetestset "Aqua" begin
+        using AlgorithmsInterface, Aqua
+        Aqua.test_all(AlgorithmsInterface)
+    end
+end