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Add missing java.lang.Long unit tests

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lax1dude 2024-12-02 19:49:20 -08:00
parent 530b6a5da5
commit 42fcbb71a7
1 changed files with 29 additions and 0 deletions
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29
tests/src/test/java/org/teavm/classlib/java/lang/LongTest.java
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@ -86,6 +86,35 @@ public class LongTest {
assertEquals(0xF63BA00000000000L, Long.reverse(0x5DC6F)); assertEquals(0xF63BA00000000000L, Long.reverse(0x5DC6F));
} }
@Test
public void numberOfLeadingZerosComputed() {
assertEquals(0, Long.numberOfLeadingZeros(-1L));
assertEquals(1, Long.numberOfLeadingZeros(0x4000000000000000L));
assertEquals(1, Long.numberOfLeadingZeros(0x4000000000000123L));
assertEquals(1, Long.numberOfLeadingZeros(0x7FFFFFFFFFFFFFFFL));
assertEquals(63, Long.numberOfLeadingZeros(1L));
assertEquals(62, Long.numberOfLeadingZeros(2L));
assertEquals(62, Long.numberOfLeadingZeros(3L));
assertEquals(0, Long.numberOfLeadingZeros(0x8000000000000000L));
assertEquals(0, Long.numberOfLeadingZeros(0x8000000000000123L));
assertEquals(0, Long.numberOfLeadingZeros(0xFFFFFFFFFFFFFFFFL));
assertEquals(64, Long.numberOfLeadingZeros(0L));
}
@Test
public void numberOfTrailingZerosComputed() {
assertEquals(1, Long.numberOfTrailingZeros(0xFFFFFFFFFFFFFFFEL));
assertEquals(1, Long.numberOfTrailingZeros(0x4000000000000002L));
assertEquals(1, Long.numberOfTrailingZeros(0x0000000000000002L));
assertEquals(63, Long.numberOfTrailingZeros(0x8000000000000000L));
assertEquals(62, Long.numberOfTrailingZeros(0x4000000000000000L));
assertEquals(62, Long.numberOfTrailingZeros(0xC000000000000000L));
assertEquals(0, Long.numberOfTrailingZeros(0x0000000000000001L));
assertEquals(0, Long.numberOfTrailingZeros(0x1230000000000003L));
assertEquals(0, Long.numberOfTrailingZeros(0xFFFFFFFFFFFFFFFFL));
assertEquals(64, Long.numberOfTrailingZeros(0L));
}
@Test @Test
public void highestOneBit() { public void highestOneBit() {
assertEquals(1L << 63, Long.highestOneBit(-1L)); assertEquals(1L << 63, Long.highestOneBit(-1L));