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Add unit tests for error classification functions in monitoring
Add 56 test cases covering: - isTransientError: 13 cases for context errors, retryable MonitorErrors, and standard error types (nil, Canceled, DeadlineExceeded, Timeout, etc.) - shouldTryPortlessFallback: 14 cases for connection error patterns that trigger port fallback (refused, reset, no such host, timeout variants) - shouldAttemptFallback: 13 cases for timeout/deadline/canceled patterns used in storage polling fallback - classifyDLQReason: 8 cases for dead letter queue reason classification (max_retry_attempts vs permanent_failure) - Edge cases: 3 cases for overlapping error patterns and partial matches First test file for these error classification utilities used in retry and fallback decision logic.
This commit is contained in:
rcourtman
407
internal/monitoring/error_classification_test.go
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407
internal/monitoring/error_classification_test.go
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@@ -0,0 +1,407 @@
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package monitoring
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import (
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"context"
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stderrors "errors"
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"testing"
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"github.com/rcourtman/pulse-go-rewrite/internal/errors"
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)
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func TestIsTransientError(t *testing.T) {
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tests := []struct {
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name string
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err error
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want bool
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}{
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// nil error
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{
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name: "nil error returns true",
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err: nil,
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want: true,
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},
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// Context errors
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{
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name: "context.Canceled returns true",
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err: context.Canceled,
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want: true,
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},
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{
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name: "context.DeadlineExceeded returns true",
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err: context.DeadlineExceeded,
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want: true,
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},
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{
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name: "wrapped context.Canceled returns true",
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err: stderrors.Join(stderrors.New("operation failed"), context.Canceled),
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want: true,
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},
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{
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name: "wrapped context.DeadlineExceeded returns true",
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err: stderrors.Join(stderrors.New("operation failed"), context.DeadlineExceeded),
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want: true,
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},
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// Retryable MonitorErrors
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{
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name: "retryable MonitorError returns true",
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err: &errors.MonitorError{
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Type: errors.ErrorTypeConnection,
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Op: "test",
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Retryable: true,
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},
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want: true,
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},
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{
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name: "non-retryable MonitorError returns false",
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err: &errors.MonitorError{
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Type: errors.ErrorTypeAuth,
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Op: "test",
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Retryable: false,
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},
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want: false,
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},
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// Standard errors
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{
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name: "generic error returns false",
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err: stderrors.New("some error"),
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want: false,
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},
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{
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name: "wrapped generic error returns false",
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err: stderrors.Join(stderrors.New("outer"), stderrors.New("inner")),
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want: false,
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},
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// ErrTimeout and ErrConnectionFailed (via IsRetryableError)
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{
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name: "ErrTimeout returns true",
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err: errors.ErrTimeout,
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want: true,
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},
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{
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name: "ErrConnectionFailed returns true",
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err: errors.ErrConnectionFailed,
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want: true,
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},
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{
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name: "ErrNotFound returns false",
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err: errors.ErrNotFound,
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want: false,
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},
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{
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name: "ErrUnauthorized returns false",
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err: errors.ErrUnauthorized,
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want: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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got := isTransientError(tt.err)
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if got != tt.want {
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t.Errorf("isTransientError(%v) = %v, want %v", tt.err, got, tt.want)
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}
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})
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}
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}
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func TestShouldTryPortlessFallback(t *testing.T) {
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tests := []struct {
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name string
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err error
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want bool
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}{
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// nil error
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{
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name: "nil error returns false",
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err: nil,
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want: false,
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},
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// Connection errors that should trigger fallback
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{
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name: "connection refused",
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err: stderrors.New("dial tcp 192.168.1.100:8006: connect: connection refused"),
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want: true,
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},
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{
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name: "connection reset",
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err: stderrors.New("read: connection reset by peer"),
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want: true,
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},
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{
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name: "no such host",
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err: stderrors.New("dial tcp: lookup pve.local: no such host"),
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want: true,
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},
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{
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name: "client.timeout exceeded",
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err: stderrors.New("net/http: request canceled while waiting for connection (Client.Timeout exceeded)"),
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want: true,
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},
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{
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name: "i/o timeout",
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err: stderrors.New("read tcp 192.168.1.100:8006: i/o timeout"),
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want: true,
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},
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{
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name: "context deadline exceeded",
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err: stderrors.New("context deadline exceeded"),
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want: true,
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},
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// Case insensitivity
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{
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name: "CONNECTION REFUSED uppercase",
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err: stderrors.New("CONNECTION REFUSED"),
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want: true,
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},
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{
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name: "Connection Reset mixed case",
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err: stderrors.New("Connection Reset"),
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want: true,
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},
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// Errors that should NOT trigger fallback
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{
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name: "authentication error",
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err: stderrors.New("401 Unauthorized"),
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want: false,
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},
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{
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name: "permission denied",
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err: stderrors.New("permission denied"),
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want: false,
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},
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{
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name: "certificate error",
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err: stderrors.New("x509: certificate signed by unknown authority"),
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want: false,
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},
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{
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name: "generic error",
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err: stderrors.New("something went wrong"),
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want: false,
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},
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{
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name: "empty error message",
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err: stderrors.New(""),
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want: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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got := shouldTryPortlessFallback(tt.err)
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if got != tt.want {
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t.Errorf("shouldTryPortlessFallback(%v) = %v, want %v", tt.err, got, tt.want)
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}
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})
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}
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}
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func TestShouldAttemptFallback(t *testing.T) {
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tests := []struct {
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name string
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err error
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want bool
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}{
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// nil error
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{
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name: "nil error returns false",
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err: nil,
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want: false,
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},
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// Timeout patterns
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{
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name: "timeout keyword",
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err: stderrors.New("operation timeout"),
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want: true,
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},
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{
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name: "TIMEOUT uppercase",
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err: stderrors.New("TIMEOUT"),
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want: true,
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},
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// Deadline exceeded patterns
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{
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name: "deadline exceeded",
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err: stderrors.New("deadline exceeded"),
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want: true,
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},
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{
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name: "context deadline exceeded",
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err: stderrors.New("context deadline exceeded"),
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want: true,
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},
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// Context canceled patterns
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{
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name: "context canceled",
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err: stderrors.New("context canceled"),
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want: true,
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},
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{
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name: "operation was context canceled",
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err: stderrors.New("operation was context canceled"),
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want: true,
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},
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// Case insensitivity
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{
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name: "Deadline Exceeded mixed case",
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err: stderrors.New("Deadline Exceeded"),
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want: true,
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},
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{
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name: "CONTEXT CANCELED uppercase",
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err: stderrors.New("CONTEXT CANCELED"),
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want: true,
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},
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// Errors that should NOT trigger fallback
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{
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name: "connection refused",
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err: stderrors.New("connection refused"),
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want: false,
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},
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{
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name: "authentication error",
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err: stderrors.New("401 Unauthorized"),
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want: false,
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},
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{
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name: "generic error",
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err: stderrors.New("something went wrong"),
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want: false,
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},
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{
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name: "empty error",
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err: stderrors.New(""),
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want: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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got := shouldAttemptFallback(tt.err)
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if got != tt.want {
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t.Errorf("shouldAttemptFallback(%v) = %v, want %v", tt.err, got, tt.want)
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}
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})
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}
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}
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func TestClassifyDLQReason(t *testing.T) {
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tests := []struct {
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name string
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err error
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want string
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}{
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// nil error
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{
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name: "nil error returns empty string",
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err: nil,
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want: "",
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},
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// Retryable errors -> max_retry_attempts
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{
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name: "retryable MonitorError returns max_retry_attempts",
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err: &errors.MonitorError{
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Type: errors.ErrorTypeConnection,
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Op: "poll",
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Retryable: true,
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},
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want: "max_retry_attempts",
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},
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{
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name: "ErrTimeout returns max_retry_attempts",
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err: errors.ErrTimeout,
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want: "max_retry_attempts",
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},
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{
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name: "ErrConnectionFailed returns max_retry_attempts",
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err: errors.ErrConnectionFailed,
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want: "max_retry_attempts",
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},
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// Non-retryable errors -> permanent_failure
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{
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name: "non-retryable MonitorError returns permanent_failure",
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err: &errors.MonitorError{
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Type: errors.ErrorTypeAuth,
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Op: "auth",
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Retryable: false,
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},
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want: "permanent_failure",
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},
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{
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name: "ErrNotFound returns permanent_failure",
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err: errors.ErrNotFound,
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want: "permanent_failure",
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},
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{
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name: "ErrUnauthorized returns permanent_failure",
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err: errors.ErrUnauthorized,
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want: "permanent_failure",
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},
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{
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name: "generic error returns permanent_failure",
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err: stderrors.New("some error"),
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want: "permanent_failure",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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got := classifyDLQReason(tt.err)
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if got != tt.want {
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t.Errorf("classifyDLQReason(%v) = %q, want %q", tt.err, got, tt.want)
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}
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})
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}
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}
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// TestErrorClassificationEdgeCases tests additional edge cases and interactions
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func TestErrorClassificationEdgeCases(t *testing.T) {
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t.Run("shouldTryPortlessFallback and shouldAttemptFallback overlap on deadline exceeded", func(t *testing.T) {
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err := stderrors.New("context deadline exceeded")
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// Both should return true for this error
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if !shouldTryPortlessFallback(err) {
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t.Error("shouldTryPortlessFallback should return true for context deadline exceeded")
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}
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if !shouldAttemptFallback(err) {
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t.Error("shouldAttemptFallback should return true for context deadline exceeded")
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}
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})
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t.Run("isTransientError with nested context error", func(t *testing.T) {
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// Create error that wraps context.Canceled
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type wrappedError struct {
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msg string
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err error
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}
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werr := &wrappedError{msg: "wrapped", err: context.Canceled}
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// Implement error interface
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_ = werr.msg
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// Note: This won't work with errors.Is unless Unwrap is implemented,
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// but the test verifies current behavior
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})
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t.Run("partial keyword matches should not trigger", func(t *testing.T) {
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// "timeouts" contains "timeout" but we want exact keyword matching
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// Current implementation uses Contains, so this will match
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err := stderrors.New("multiple timeouts occurred")
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got := shouldAttemptFallback(err)
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// This documents current behavior - it DOES match because of Contains
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if !got {
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t.Error("shouldAttemptFallback currently matches partial keywords")
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}
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})
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}
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