@NotNull
public ImmutableList<Integer> range(final int lower, final int upper, final int step) {
ImmutableList<Integer> result = ImmutableList.nil();
for (int i = upper - ((upper - lower + step - 1) % step + 1); i >= lower; i -= step) {
result = result.cons(i);
}
return result;
}
public abstract class TestBase {
private static final String BASE_PATH =
System.getenv("CONFIG_DIR") == null ? "src/test/resources" : System.getenv("CONFIG_DIR");
private static Random rand = new Random();
protected static int rand(int low, int high) {
return rand.nextInt(Math.max(high - low, 1)) + low;
}
protected static int rand() {
return rand(-100, 101);
}
protected static Path getPath(String path) {
Path pathObj = Paths.get(BASE_PATH + '/' + path);
if (Files.exists(pathObj)) {
return pathObj;
} else {
try {
return Paths.get(TestBase.class.getResource("/" + path).toURI());
} catch (URISyntaxException e) {
throw new RuntimeException(e);
}
}
}
@NotNull
protected static String readFile(@NotNull String path) throws IOException {
byte[] encoded = Files.readAllBytes(getPath(path));
return StandardCharsets.UTF_8.decode(ByteBuffer.wrap(encoded)).toString();
}
// Tests
// static
protected static NonEmptyImmutableList<Integer> LONG_LIST = ImmutableList.list(rand());
static {
for (int i = 0; i < 1000; i++) {
LONG_LIST = LONG_LIST.cons(rand());
}
}
@Before
public void setUp() {
rand = new Random(12345L);
}
@NotNull
public ImmutableList<Integer> range(final int upper) {
return range(0, upper);
}
@NotNull
public ImmutableList<Integer> range(final int lower, final int upper) {
return range(lower, upper, 1);
}
@NotNull
public ImmutableList<Integer> range(final int lower, final int upper, final int step) {
ImmutableList<Integer> result = ImmutableList.nil();
for (int i = upper - ((upper - lower + step - 1) % step + 1); i >= lower; i -= step) {
result = result.cons(i);
}
return result;
}
}