Big changes

server/internal/logging/logging_test.go

@@ -0,0 +1,58 @@
+package logging
+
+import (
+	"bytes"
+	"log/slog"
+	"strings"
+	"testing"
+)
+
+func TestNewWritesReadableStructuredText(t *testing.T) {
+	var output bytes.Buffer
+	New(&output, slog.LevelInfo).Info("server ready", "listen", ":8080")
+
+	line := output.String()
+	if strings.HasPrefix(strings.TrimSpace(line), "{") {
+		t.Fatalf("expected text output, got JSON: %s", line)
+	}
+	for _, want := range []string{`level=INFO`, `msg="server ready"`, `listen=:8080`} {
+		if !strings.Contains(line, want) {
+			t.Errorf("output %q does not contain %q", line, want)
+		}
+	}
+}
+
+func TestBufferedLoggerRetainsStructuredEventsWithCursorPagination(t *testing.T) {
+	var output bytes.Buffer
+	logger, buffer := NewBuffered(&output, slog.LevelDebug, 3)
+	for i := 1; i <= 5; i++ {
+		logger.Info("request complete", "number", i)
+	}
+
+	first := buffer.Events(0, 2)
+	if first.Dropped != 2 || len(first.Events) != 2 || !first.HasMore {
+		t.Fatalf("unexpected first page: %+v", first)
+	}
+	if first.Events[0].Sequence != 3 || first.Events[0].Attributes["number"] != "3" {
+		t.Fatalf("oldest retained event was not delivered: %+v", first.Events[0])
+	}
+	second := buffer.Events(first.Next, 2)
+	if len(second.Events) != 1 || second.Events[0].Sequence != 5 || second.HasMore {
+		t.Fatalf("unexpected second page: %+v", second)
+	}
+}
+
+func TestParseLevel(t *testing.T) {
+	tests := map[string]slog.Level{
+		"":        slog.LevelInfo,
+		"debug":   slog.LevelDebug,
+		"WARNING": slog.LevelWarn,
+		"error":   slog.LevelError,
+		"unknown": slog.LevelInfo,
+	}
+	for input, want := range tests {
+		if got := ParseLevel(input); got != want {
+			t.Errorf("ParseLevel(%q) = %v, want %v", input, got, want)
+		}
+	}
+}