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#include <darwintest.h>
#include "mocks/unit_test_utils.h"
#include <kern/bits.h>
#define UT_MODULE osfmk
T_GLOBAL_META(
T_META_NAMESPACE("xnu.scheduler"),
T_META_RADAR_COMPONENT_NAME("xnu"),
T_META_RADAR_COMPONENT_VERSION("scheduler"),
T_META_TAG_VM_PREFERRED
);
T_DECL(xnu_bits, "snapshot tests for bit manipulation routines")
{
T_EXPECT_EQ(bit_first(0ULL), -1, "bit_first");
T_EXPECT_EQ(lsb_first(0ULL), -1, "lsb_first");
for (int i = 0; i < 64; i++) {
T_EXPECT_EQ(bit_first(BIT(i)), i, "bit_first");
T_EXPECT_EQ(lsb_first(BIT(i)), i, "lsb_first");
T_EXPECT_EQ(bit_first(mask(i)), i - 1, "bit_first");
T_EXPECT_EQ(lsb_first(mask(i)), i > 0 ? 0 : -1, "lsb_first");
T_EXPECT_EQ(bit_next(0ULL, i), -1, "bit_next");
T_EXPECT_EQ(lsb_next(0ULL, i), -1, "lsb_next");
T_EXPECT_EQ(bit_next(~(0ULL), i), i - 1, "bit_next");
T_EXPECT_EQ(lsb_next(~(0ULL), i), i < 63 ? i + 1 : -1, "lsb_next");
}
}