Added unit test for recipe finder

Author: cmaglie

internal/arduino/builder/recipe_test.go

@@ -0,0 +1,43 @@
+package builder
+
+import (
+	"testing"
+
+	properties "github.com/arduino/go-properties-orderedmap"
+	"github.com/stretchr/testify/require"
+)
+
+func TestRecipeFinder(t *testing.T) {
+	t.Run("NumberedRecipes", func(t *testing.T) {
+		buildProperties := properties.NewMap()
+		buildProperties.Set("recipe.test", "test")
+		buildProperties.Set("recipe.1.test", "test2")
+		buildProperties.Set("recipe.2.test", "test3")
+		recipes := findRecipes(buildProperties, "recipe", ".test")
+		require.Equal(t, []string{"recipe.1.test", "recipe.2.test"}, recipes)
+	})
+	t.Run("NumberedRecipesWithGaps", func(t *testing.T) {
+		buildProperties := properties.NewMap()
+		buildProperties.Set("recipe.test", "test")
+		buildProperties.Set("recipe.2.test", "test3")
+		buildProperties.Set("recipe.0.test", "test2")
+		recipes := findRecipes(buildProperties, "recipe", ".test")
+		require.Equal(t, []string{"recipe.0.test", "recipe.2.test"}, recipes)
+	})
+	t.Run("NumberedRecipesWithGapsAndDifferentLenghtNumbers", func(t *testing.T) {
+		buildProperties := properties.NewMap()
+		buildProperties.Set("recipe.test", "test")
+		buildProperties.Set("recipe.12.test", "test3")
+		buildProperties.Set("recipe.2.test", "test2")
+		recipes := findRecipes(buildProperties, "recipe", ".test")
+		require.Equal(t, []string{"recipe.2.test", "recipe.12.test"}, recipes)
+	})
+	t.Run("UnnumberedRecipies", func(t *testing.T) {
+		buildProperties := properties.NewMap()
+		buildProperties.Set("recipe.test", "test")
+		buildProperties.Set("recipe.a.test", "test3")
+		buildProperties.Set("recipe.b.test", "test2")
+		recipes := findRecipes(buildProperties, "recipe", ".test")
+		require.Equal(t, []string{"recipe.test"}, recipes)
+	})
+}