fix(dockerCompose): protect of empty attributes

pkg/domain/dockerCompose/config_test.go

@@ -1418,6 +1418,17 @@ func TestService_MergeLastWin(t *testing.T) {
 				CapabilitiesAdd: []string{"NET_RAW"},
 			},
 		},
+		{
+			serviceDeploymentA: &dockerCompose.Service{
+				CapabilitiesAdd: []string{"NET_RAW"},
+			},
+			serviceDeploymentB: &dockerCompose.Service{
+				CapabilitiesAdd: []string{""},
+			},
+			expectedService: &dockerCompose.Service{
+				CapabilitiesAdd: []string{"NET_RAW"},
+			},
+		},
 
 		// CapabilitiesDrop
 		{
@@ -1453,6 +1464,17 @@ func TestService_MergeLastWin(t *testing.T) {
 				CapabilitiesDrop: []string{"NET_RAW"},
 			},
 		},
+		{
+			serviceDeploymentA: &dockerCompose.Service{
+				CapabilitiesDrop: []string{"NET_RAW"},
+			},
+			serviceDeploymentB: &dockerCompose.Service{
+				CapabilitiesDrop: []string{""},
+			},
+			expectedService: &dockerCompose.Service{
+				CapabilitiesDrop: []string{"NET_RAW"},
+			},
+		},
 
 		// Deploy
 		{
@@ -1567,6 +1589,17 @@ func TestService_MergeLastWin(t *testing.T) {
 				Environments: []string{"PROXY_HOST=u.example.local"},
 			},
 		},
+		{
+			serviceDeploymentA: &dockerCompose.Service{
+				Environments: []string{"PROXY_HOST=u.example.com"},
+			},
+			serviceDeploymentB: &dockerCompose.Service{
+				Environments: []string{""},
+			},
+			expectedService: &dockerCompose.Service{
+				Environments: []string{"PROXY_HOST=u.example.com"},
+			},
+		},
 
 		// ExtraHosts
 		{
@@ -1635,6 +1668,17 @@ func TestService_MergeLastWin(t *testing.T) {
 				ExtraHosts: []string{"extra.host.com", "extra.host.local"},
 			},
 		},
+		{
+			serviceDeploymentA: &dockerCompose.Service{
+				ExtraHosts: []string{"extra.host.local"},
+			},
+			serviceDeploymentB: &dockerCompose.Service{
+				ExtraHosts: []string{""},
+			},
+			expectedService: &dockerCompose.Service{
+				ExtraHosts: []string{"extra.host.local"},
+			},
+		},
 
 		// Image
 		{
@@ -1738,6 +1782,17 @@ func TestService_MergeLastWin(t *testing.T) {
 				Labels: []string{"prometheus.io/scrape=true"},
 			},
 		},
+		{
+			serviceDeploymentA: &dockerCompose.Service{
+				Labels: []string{"prometheus.io/scrape=true"},
+			},
+			serviceDeploymentB: &dockerCompose.Service{
+				Labels: []string{""},
+			},
+			expectedService: &dockerCompose.Service{
+				Labels: []string{"prometheus.io/scrape=true"},
+			},
+		},
 
 		// Networks
 		{
@@ -1817,6 +1872,23 @@ func TestService_MergeLastWin(t *testing.T) {
 				},
 			},
 		},
+		{
+			serviceDeploymentA: &dockerCompose.Service{
+				Networks: map[string]*dockerCompose.ServiceNetwork{
+					"proxy": {Aliases: []string{"app.proxy.network"}},
+				},
+			},
+			serviceDeploymentB: &dockerCompose.Service{
+				Networks: map[string]*dockerCompose.ServiceNetwork{
+					"proxy": {Aliases: []string{""}},
+				},
+			},
+			expectedService: &dockerCompose.Service{
+				Networks: map[string]*dockerCompose.ServiceNetwork{
+					"proxy": {Aliases: []string{"app.proxy.network"}},
+				},
+			},
+		},
 
 		// Ports
 		{
@@ -1907,6 +1979,17 @@ func TestService_MergeLastWin(t *testing.T) {
 				Ports: []string{"10080:80/udp"},
 			},
 		},
+		{
+			serviceDeploymentA: &dockerCompose.Service{
+				Ports: []string{"80:80"},
+			},
+			serviceDeploymentB: &dockerCompose.Service{
+				Ports: []string{""},
+			},
+			expectedService: &dockerCompose.Service{
+				Ports: []string{"80:80"},
+			},
+		},
 
 		// Secrets
 		{
@@ -1975,6 +2058,17 @@ func TestService_MergeLastWin(t *testing.T) {
 				Secrets: []string{"db_pass_credentials", "oauth2_pass_credentials"},
 			},
 		},
+		{
+			serviceDeploymentA: &dockerCompose.Service{
+				Secrets: []string{"db_pass_credentials"},
+			},
+			serviceDeploymentB: &dockerCompose.Service{
+				Secrets: []string{""},
+			},
+			expectedService: &dockerCompose.Service{
+				Secrets: []string{"db_pass_credentials"},
+			},
+		},
 
 		// ULimits
 		{
@@ -2147,6 +2241,17 @@ func TestService_MergeLastWin(t *testing.T) {
 				Volumes: []string{"/usr/share/zoneinfo/Europe/Berlin:/etc/localtime"},
 			},
 		},
+		{
+			serviceDeploymentA: &dockerCompose.Service{
+				Volumes: []string{"/etc/localtime:/etc/localtime"},
+			},
+			serviceDeploymentB: &dockerCompose.Service{
+				Volumes: []string{""},
+			},
+			expectedService: &dockerCompose.Service{
+				Volumes: []string{"/etc/localtime:/etc/localtime"},
+			},
+		},
 	}
 
 	for i, testCase := range testCases {