Some solutions for the julia path

julia/perfect-numbers/runtests.jl

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+using Test
+
+include("perfect-numbers.jl")
+
+@testset verbose = true "tests" begin
+    @testset "Perfect numbers" begin
+
+        @testset "Smallest perfect number is classified correctly" begin
+            @test isperfect(6)
+        end
+
+        @testset "Medium perfect number is classified correctly" begin
+            @test isperfect(28)
+        end
+
+        @testset "Large perfect number is classified correctly" begin
+            @test isperfect(33550336)
+        end
+        
+        @testset "Correctly handles non-perfect numbers" begin
+            @test !isperfect(12)
+            @test !isperfect(4)
+        end
+    end
+
+    @testset "Abundant numbers" begin
+
+        @testset "Smallest abundant number is classified correctly" begin
+            @test isabundant(12)
+        end
+
+        @testset "Medium abundant number is classified correctly" begin
+            @test isabundant(30)
+        end
+
+        @testset "Large abundant number is classified correctly" begin
+            @test isabundant(33550335)
+        end
+
+        @testset "Correctly handles non-abundant numbers" begin
+            @test !isabundant(6)
+            @test !isabundant(32)
+        end
+    end
+
+    @testset "Deficient numbers" begin
+
+        @testset "Smallest prime deficient number is classified correctly" begin
+            @test isdeficient(2)
+        end
+
+        @testset "Smallest non-prime deficient number is classified correctly" begin
+            @test isdeficient(4)
+        end
+
+        @testset "Medium deficient number is classified correctly" begin
+            @test isdeficient(32)
+        end
+
+        @testset "Large deficient number is classified correctly" begin
+            @test isdeficient(33550337)
+        end
+
+        @testset "Edge case (no factors other than itself) is classified correctly" begin
+            @test isdeficient(1)
+        end
+
+        @testset "Correctly handles non-deficient numbers" begin
+            @test !isdeficient(28)
+            @test !isdeficient(30)
+        end
+    end
+
+    @testset "Invalid inputs" begin
+
+        @testset "Zero is rejected (not a natural number)" begin
+            @test_throws DomainError isdeficient(0)
+            @test_throws DomainError isperfect(0)
+            @test_throws DomainError isabundant(0)
+        end
+
+        @testset "Negative integer is rejected (not a natural number)" begin
+            @test_throws DomainError isdeficient(-1)
+            @test_throws DomainError isperfect(-1)
+            @test_throws DomainError isabundant(-1)
+        end
+    end
+end