@Test
public void testReadByte() {
byte[] ramData = new byte[] {0, 1, (byte) 0377, (byte) 0376};
RandomAccessMemory ram = new RandomAccessMemory("TestRam", 01000, ramData);
assertEquals(0, ram.read(true, 01000));
assertEquals(1, ram.read(true, 01001));
assertEquals(0377, ram.read(true, 01002));
assertEquals(0376, ram.read(true, 01003));
}
@Test
public void testWriteByte() {
byte[] ramData = new byte[] {0, 0};
RandomAccessMemory ram = new RandomAccessMemory("TestRam", 01000, ramData);
ram.write(true, 01000, 1);
assertEquals(1, ram.read(false, 01000));
ram.write(true, 01001, 0377);
assertEquals((0377 << 8) + 1, ram.read(false, 01000));
ram.write(true, 01001, 0177777);
assertEquals((0377 << 8) + 1, ram.read(false, 01000));
}
@Test
public void testReadWord() {
short[] ramData = new short[] {0, 1, (short) 0177777, (short) 0177776};
RandomAccessMemory ram = new RandomAccessMemory("TestRam", 01000, ramData);
assertEquals(0, ram.read(false, 01000));
assertEquals(0, ram.read(false, 01001));
assertEquals(1, ram.read(false, 01002));
assertEquals(1, ram.read(false, 01003));
assertEquals(0177777, ram.read(false, 01004));
assertEquals(0177777, ram.read(false, 01005));
assertEquals(0177776, ram.read(false, 01006));
assertEquals(0177776, ram.read(false, 01007));
}
@Test
public void testWriteWord() {
short[] ramData = new short[] {0, 0};
RandomAccessMemory ram = new RandomAccessMemory("TestRam", 01000, ramData);
ram.write(false, 01000, 0377);
assertEquals(0377, ram.read(false, 01000));
ram.write(false, 01001, 0377);
assertEquals(0377, ram.read(false, 01000));
ram.write(false, 01002, 0177777);
assertEquals(0177777, ram.read(false, 01002));
ram.write(false, 01003, 0177777);
assertEquals(0177777, ram.read(false, 01002));
ram.write(false, 01002, 01777777);
assertEquals(0177777, ram.read(false, 01002));
}