#include <gtest/gtest.h>
#include "calc.hpp"
#include <cmath>

TEST(CalcTest, FormatSigFigs) {
    // Test positive numbers
    EXPECT_EQ(format_sig_figs(123.456, 3), "1.23e+02");
    EXPECT_EQ(format_sig_figs(123.456, 4), "1.235e+02");
    EXPECT_EQ(format_sig_figs(123.456, 5), "1.2346e+02");
}