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test/test_native_civil_time/FakeMonotonicClock.h

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+#pragma once
+
+#include "SessionClock.h"
+
+class FakeMonotonicClock final : public timbre_core::MonotonicClock {
+public:
+    explicit FakeMonotonicClock(std::uint64_t initial = 0) : value_(initial) {}
+
+    std::uint64_t nowMs() const override { return value_; }
+    void advance(std::uint64_t milliseconds) noexcept { value_ += milliseconds; }
+    void set(std::uint64_t milliseconds) noexcept { value_ = milliseconds; }
+
+private:
+    std::uint64_t value_;
+};