Update go-version to use go.mod file

.github/workflows/main-flow.yml

@@ -17,7 +17,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.22.0
+          go-version-file: 'go.mod'
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v4
         with:
@@ -29,7 +29,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.22.0
+          go-version-file: 'go.mod'
       - name: Build & test
         run: make ci-test
       - name: Upload log files

.github/workflows/pr-flow.yml

@@ -12,7 +12,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.22.0
+          go-version-file: 'go.mod'
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v4
         with:
@@ -24,7 +24,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.22.0
+          go-version-file: 'go.mod'
       - name: Build & test
         run: make ci-test
       - name: Upload log files

.github/workflows/release-flow.yml

@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.22.0
+          go-version-file: 'go.mod'
       - name: Build release
         run: |
           make clean lint test;

app/server/backend.go

@@ -22,7 +22,7 @@ var (
 	ErrAuthAnonCredentials = errors.New("user has not authenticated. anonymous access is not allowed")
 
 	// ErrUnsupportedMechanism error for unsupported mechanism.
-	ErrorUnsupportedMechanism = errors.New("unsupported authentication mechanism")
+	ErrUnsupportedMechanism = errors.New("unsupported authentication mechanism")
 )
 
 // The backend implements SMTP server methods.
@@ -127,7 +127,7 @@ func (s *session) Auth(mech string) (sasl.Server, error) {
 			return err
 		}), nil
 	default:
-		return nil, ErrorUnsupportedMechanism
+		return nil, ErrUnsupportedMechanism
 	}
 }
 

tests/infra.go

@@ -122,8 +122,12 @@ func dynamicPort() int {
 			panic(err)
 		}
 	}()
-	port := listener.Addr().(*net.TCPAddr).Port
-	return port
+
+	if port, ok := listener.Addr().(*net.TCPAddr); ok {
+		return port.Port
+	}
+
+	panic("Failed to get port")
 }
 
 // TerminateContainer terminates container if present.