fix(rules): Omitempty the facet values rules ordering (#702)

* fix(rules) Omitempty the  of the facet values rules ordering

* To ammend

* Update algolia/search/rendering_content_test.go

Co-authored-by: Samuel Vaillant <[email protected]>

* chore: refactoring tests and docker readme

* fixup! chore: refactoring tests and docker readme

Co-authored-by: Samuel Vaillant <[email protected]>
Co-authored-by: Loïc Say <[email protected]>
Co-authored-by: Loïc Say <[email protected]>

Author: 4 people

DOCKER_README.MD

@@ -18,7 +18,7 @@ $ brew install docker-machine
 
 Then install [VirtualBox](https://www.virtualbox.org/) using [Homebrew Cask](https://github.com/Homebrew/homebrew-cask) to get a driver for your Docker machine
 ```
-$ brew cask install virtualbox
+$ brew install --cask virtualbox
 ```
 
 You may need to enter your password and authorize the application through `System Settings` > `Security & Privacy`.

algolia/search/rendering_content.go

@@ -12,7 +12,7 @@ type FacetOrdering struct {
 	Facets *FacetsOrder `json:"facets"`
 
 	// The ordering of facet values, within an individual list.
-	Values map[string]FacetValuesOrder `json:"values"`
+	Values map[string]FacetValuesOrder `json:"values,omitempty"`
 }
 
 // Facets ordering rule container
@@ -24,7 +24,7 @@ type FacetsOrder struct {
 // Facet values ordering rule container
 type FacetValuesOrder struct {
 	// Pinned order of facet values.
-	Order []string `json:"order"`
+	Order []string `json:"order,omitempty"`
 
 	// How to display the remaining items.
 	SortRemainingBy *SortRule `json:"sortRemainingBy"`

algolia/search/rendering_content_test.go

@@ -21,6 +21,9 @@ func TestUnmarshalRenderingContent(t *testing.T) {
 				},
 				"color": {
 					"order": ["red", "green"]
+				},
+				"size": {
+					"sortRemainingBy": "alpha"
 				}
 			}
 		}
@@ -29,10 +32,91 @@ func TestUnmarshalRenderingContent(t *testing.T) {
 	err := json.Unmarshal([]byte(payload), &r)
 	require.NoError(t, err)
 	require.Equal(t, r.FacetOrdering.Facets.Order, []string{"brand", "size", "color"})
+
 	require.Equal(t, r.FacetOrdering.Values["brand"].Order, []string{"Apple", "Sony", "Samsung"})
 	require.Equal(t, *r.FacetOrdering.Values["brand"].SortRemainingBy, Alpha)
+
 	require.Equal(t, r.FacetOrdering.Values["color"].Order, []string{"red", "green"})
 	require.Nil(t, r.FacetOrdering.Values["color"].SortRemainingBy)
+
+	require.Nil(t, r.FacetOrdering.Values["size"].Order)
+}
+
+func TestMarshalRenderingContent(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    RenderingContent
+		expected string
+	}{
+		{
+			name: "empty values",
+			input: RenderingContent{
+				FacetOrdering: &FacetOrdering{
+					Facets: &FacetsOrder{
+						Order: []string{"brand", "size", "color"},
+					},
+					Values: nil,
+				},
+			},
+			expected: `{
+				"facetOrdering": {
+					"facets": {
+						"order": [
+							"brand",
+							"size",
+							"color"
+						]
+					}
+				}
+			}`,
+		},
+		{
+			name: "values with one empty facet value `order`",
+			input: RenderingContent{
+				FacetOrdering: &FacetOrdering{
+					Facets: &FacetsOrder{
+						Order: []string{"brand", "size", "color"},
+					},
+					Values: map[string]FacetValuesOrder{
+						"brand": NewFacetValuesOrder([]string{"Apple", "Sony", "Samsung"}, Alpha),
+						"color": NewFacetValuesOrder(nil, Hidden),
+					},
+				},
+			},
+			expected: `{
+				"facetOrdering": {
+					"facets": {
+						"order": [
+							"brand",
+							"size",
+							"color"
+						]
+					},
+					"values": {
+						"brand": {
+							"order": [
+								"Apple",
+								"Sony",
+								"Samsung"
+							],
+							"sortRemainingBy": "alpha"
+						},
+						"color": {
+							"sortRemainingBy": "hidden"
+						}
+					}
+				}
+			}`,
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			b, err := json.Marshal(test.input)
+			require.NoError(t, err)
+			require.JSONEq(t, test.expected, string(b))
+		})
+	}
 }
 
 func TestBuildRenderingContent(t *testing.T) {