fix: store large log outputs in tar bundles of logs

internal/rotatinglog/rotatinglog_test.go

@@ -0,0 +1,61 @@
+package rotatinglog
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+)
+
+func TestRotatingLog(t *testing.T) {
+	log := NewRotatingLog(t.TempDir()+"/rotatinglog", 10)
+	name, err := log.Write([]byte("test"))
+	if err != nil {
+		t.Fatalf("Write failed: %v", err)
+	}
+	data, err := log.Read(name)
+	if err != nil {
+		t.Fatalf("Read failed: %v", err)
+	}
+	if string(data) != "test" {
+		t.Fatalf("Read failed: expected test, got %s", string(data))
+	}
+}
+
+func TestRotatingLogMultipleEntries(t *testing.T) {
+	log := NewRotatingLog(t.TempDir()+"/rotatinglog", 10)
+	for i := 0; i < 10; i++ {
+		name, err := log.Write([]byte(fmt.Sprintf("%d", i)))
+		if err != nil {
+			t.Fatalf("Write failed: %v", err)
+		}
+		data, err := log.Read(name)
+		if err != nil {
+			t.Fatalf("Read failed: %v", err)
+		}
+		if fmt.Sprintf("%d", i) != string(data) {
+			t.Fatalf("Read failed: expected %d, got %s", i, string(data))
+		}
+	}
+}
+
+func TestBigEntries(t *testing.T) {
+	log := NewRotatingLog(t.TempDir()+"/rotatinglog", 10)
+	for size := range []int{10, 100, 1234, 5938, 1023, 1025} {
+		data := genstr(size)
+		name, err := log.Write([]byte(data))
+		if err != nil {
+			t.Fatalf("Write failed: %v", err)
+		}
+		read, err := log.Read(name)
+		if err != nil {
+			t.Fatalf("Read failed: %v", err)
+		}
+		if string(read) != data {
+			t.Fatalf("Read failed: expected %s, got %s", data, string(read))
+		}
+	}
+}
+
+func genstr(size int) string {
+	return strings.Repeat("a", size)
+}