Populate MyFirstPackage.jl, runtests.jl and add functions.jl

src/MyFirstPackage.jl

@@ -1,5 +1,7 @@
 module MyFirstPackage
 
 # Write your package code here.
+export multiply_xy, greet_the_world, greet_your_package_name
+include("functions.jl")
 
 end

src/functions.jl

@@ -0,0 +1,11 @@
+function greet_your_package_name()
+    return "Hello MyFirstPackage!"
+end
+
+function greet_the_world()
+    return "Hello World!"
+end
+
+function multiply_xy(x::Integer, y::Integer)
+    return x * y
+end

test/runtests.jl

@@ -3,4 +3,7 @@ using Test
 
 @testset "MyFirstPackage.jl" begin
     # Write your tests here.
+    @test MyFirstPackage.greet_your_package_name() == "Hello MyFirstPackage!"
+    @test MyFirstPackage.greet_the_world() == "Hello World!"
+    @test MyFirstPackage.multiply_xy(5, 5) == 25
 end