From df53eef6f25c51a4af8052beaac500101258f641 Mon Sep 17 00:00:00 2001
From: Seila Gamo <seila.gamo@adevinta.com>
Date: Thu, 19 Sep 2024 12:25:20 +0200
Subject: [PATCH] internal/config: fix CR issues

---
 internal/config/merge.go      | 17 +++++------------
 internal/config/merge_test.go | 31 +++++++++++++++----------------
 2 files changed, 20 insertions(+), 28 deletions(-)

diff --git a/internal/config/merge.go b/internal/config/merge.go
index 4c3dedc..fb6b93b 100644
--- a/internal/config/merge.go
+++ b/internal/config/merge.go
@@ -8,18 +8,11 @@ import (
 	"dario.cat/mergo"
 )
 
-// Merger has the ability to merge two configurations.
-type Merger interface {
-	Merge(dst, src Config) (Config, error)
-}
-
-// LavaMerger represents a merger for the Lava configuration.
-type LavaMerger struct{}
-
-// Merge merges two configurations. The values of the configuration
-// passed as first parameter will override those in the configuration
-// passed as second parameter.
-func (lm LavaMerger) Merge(dst, src Config) (Config, error) {
+// merge merges two configurations. The values of the configuration
+// passed as first parameter will be overridden by those in the
+// configuration passed as second parameter avoiding overriding with
+// nil values.
+func merge(dst, src Config) (Config, error) {
 	merged := Config{}
 	mergeOpts := []func(*mergo.Config){
 		mergo.WithOverride,
diff --git a/internal/config/merge_test.go b/internal/config/merge_test.go
index 0fe6872..cdb9d7f 100644
--- a/internal/config/merge_test.go
+++ b/internal/config/merge_test.go
@@ -12,22 +12,22 @@ import (
 func TestLavaMerger_Merge(t *testing.T) {
 	tests := []struct {
 		name    string
-		cfg1    Config
-		cfg2    Config
+		dst     Config
+		src     Config
 		want    Config
 		wantErr bool
 	}{
 		{
 			name:    "Two empty configurations",
-			cfg1:    Config{},
-			cfg2:    Config{},
+			dst:     Config{},
+			src:     Config{},
 			want:    Config{},
 			wantErr: false,
 		},
 		{
 			name: "Simple case",
-			cfg1: Config{},
-			cfg2: Config{
+			dst:  Config{},
+			src: Config{
 				LavaVersion: ptr("v1.0.0"),
 			},
 			want: Config{
@@ -37,7 +37,7 @@ func TestLavaMerger_Merge(t *testing.T) {
 		},
 		{
 			name: "Settings with default values won't override",
-			cfg1: Config{
+			dst: Config{
 				LavaVersion: ptr("v1.0.0"),
 				AgentConfig: AgentConfig{
 					PullPolicy: ptr(agentconfig.PullPolicyAlways),
@@ -66,7 +66,7 @@ func TestLavaMerger_Merge(t *testing.T) {
 					Metrics: ptr("metrics.json"),
 				},
 			},
-			cfg2: Config{},
+			src: Config{},
 			want: Config{
 				LavaVersion: ptr("v1.0.0"),
 				AgentConfig: AgentConfig{
@@ -102,7 +102,7 @@ func TestLavaMerger_Merge(t *testing.T) {
 		},
 		{
 			name: "Override value",
-			cfg1: Config{
+			dst: Config{
 				LavaVersion: ptr("v1.0.0"),
 				AgentConfig: AgentConfig{
 					PullPolicy: ptr(agentconfig.PullPolicyAlways),
@@ -133,7 +133,7 @@ func TestLavaMerger_Merge(t *testing.T) {
 					Metrics: ptr("metrics2.json"),
 				},
 			},
-			cfg2: Config{
+			src: Config{
 				LavaVersion: ptr("v1.0.1"),
 				AgentConfig: AgentConfig{
 					PullPolicy: ptr(agentconfig.PullPolicyNever),
@@ -205,7 +205,7 @@ func TestLavaMerger_Merge(t *testing.T) {
 		},
 		{
 			name: "Append Exclusions",
-			cfg1: Config{
+			dst: Config{
 				ReportConfig: ReportConfig{
 					Exclusions: []Exclusion{
 						{
@@ -214,7 +214,7 @@ func TestLavaMerger_Merge(t *testing.T) {
 					},
 				},
 			},
-			cfg2: Config{
+			src: Config{
 				ReportConfig: ReportConfig{
 					Exclusions: []Exclusion{
 						{
@@ -239,7 +239,7 @@ func TestLavaMerger_Merge(t *testing.T) {
 		},
 		{
 			name: "Duplicated Exclusions",
-			cfg1: Config{
+			dst: Config{
 				ReportConfig: ReportConfig{
 					Exclusions: []Exclusion{
 						{
@@ -248,7 +248,7 @@ func TestLavaMerger_Merge(t *testing.T) {
 					},
 				},
 			},
-			cfg2: Config{
+			src: Config{
 				ReportConfig: ReportConfig{
 					Exclusions: []Exclusion{
 						{
@@ -270,8 +270,7 @@ func TestLavaMerger_Merge(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			lm := LavaMerger{}
-			got, err := lm.Merge(tt.cfg1, tt.cfg2)
+			got, err := merge(tt.dst, tt.src)
 			if (err != nil) != tt.wantErr {
 				t.Errorf("unexpected error value: %v", err)
 			}