jau.test.io.TestMemBuffers00 Class Reference

Inheritance diagram for jau.test.io.TestMemBuffers00:

Collaboration diagram for jau.test.io.TestMemBuffers00:

Public Member Functions
final void	test01_ByteBuffer ()
Public Member Functions inherited from jau.test.junit.util.JunitTracer
final String	getFullTestName (final String separator)
final String	getSimpleTestName (final String separator)
final String	getTestMethodName ()
final void	setUpBase ()
final void	tearDownBase ()

Static Public Member Functions
static void	main (final String args[])
Static Public Member Functions inherited from jau.test.junit.util.JunitTracer
static final boolean	isTestSupported ()
static final void	oneTimeSetUpBase ()
static final void	oneTimeTearDownBase ()
static final void	setTestSupported (final boolean v)
static void	waitForKey (final String preMessage)

Additional Inherited Members
Public Attributes inherited from jau.test.junit.util.JunitTracer
final TestName	_unitTestName = new TestName()

Detailed Description

Definition at line 41 of file TestMemBuffers00.java.

Member Function Documentation

test01_ByteBuffer()

final void jau.test.io.TestMemBuffers00.test01_ByteBuffer

(

)

Definition at line 45 of file TestMemBuffers00.java.

main()

static void jau.test.io.TestMemBuffers00.main ( final String  args[] )

static

@Test(timeout = 10000)
public final void test02_String_ByteBuffer() {
    PlatformRuntime.checkInitialized();
    final ByteBuffer b0;
    {
        final String s1 = "0123456789"; // len = 10
        b0 = CPUtils.to_ByteBuffer(s1, false);
        final String s2 = new String(s1.getBytes()); // true copy before deletion
        final boolean r2 = CPUtils.zeroString(s2);

Assert.assertTrue( r1 ); CPUtils.fprintf_td(System.err, "test01_enc_dec_file_ok.1a: s1: '%s', len %d\n", s1, s1.length()); CPUtils.fprintf_td(System.err, "test01_enc_dec_file_ok.1a: s2: '%s', len %d, zeroString result %b\n", s2, s2.length(), r2);

final boolean r1 = CPUtils.zeroString(s1); CPUtils.fprintf_td(System.err, "test01_enc_dec_file_ok.1b: s1: '%s', len %d, zeroString result %b\n", s1, s1.length(), r1); } { Ooops, the internalized string at compile time got zeroed out final String s1 = "0123456789"; // len = 10 CPUtils.fprintf_td(System.err, "test01_enc_dec_file_ok.1c: s1: '%s', len %d\n", s1, s1.length()); } { That works, using dynamic storage final String s1 = CPUtils.to_String(b0, StandardCharsets.UTF_8); CPUtils.fprintf_td(System.err, "test01_enc_dec_file_ok.1d: s1: '%s', len %d\n", s1, s1.length()); } { final String s1 = CPUtils.to_String(b0, StandardCharsets.UTF_8); CPUtils.fprintf_td(System.err, "test01_enc_dec_file_ok.2a: s1: '%s', len %d\n", s1, s1.length());

final ByteBuffer b1 = CPUtils.newDirectByteBuffer(s1.length() * 2); Assert.assertEquals(s1.length() * 2, b1.capacity()); Assert.assertEquals(s1.length() * 2, b1.limit()); Assert.assertEquals(0, b1.position()); Assert.assertEquals(s1.length() * 2, b1.remaining());

b1.put(s1.getBytes(StandardCharsets.UTF_8)); Assert.assertEquals(s1.length(), b1.position()); b1.flip(); Assert.assertEquals(s1.length(), b1.limit()); Assert.assertEquals(0, b1.position()); Assert.assertEquals(s1.length(), b1.remaining()); { final String b1_str = CPUtils.to_String(b1, StandardCharsets.UTF_8); CPUtils.fprintf_td(System.err, "test01_enc_dec_file_ok.2b: b1: '%s', len %d/%d\n", b1_str, b1_str.length(), b1.limit()); } Assert.assertEquals(s1.length(), b1.limit()); Assert.assertEquals(0, b1.position()); Assert.assertEquals(s1.length(), b1.remaining());

final String s2 = new String(s1.getBytes()); // true copy final ByteBuffer b2 = CPUtils.to_ByteBuffer(s2, true); Assert.assertEquals(s1.length(), b2.capacity()); Assert.assertEquals(s1.length(), b2.limit()); Assert.assertEquals(0, b2.position()); Assert.assertEquals(s1.length(), b2.remaining()); { final byte[] b2_bytes = new byte[b2.remaining()]; b2.get(b2_bytes); b2.rewind(); // yada yada yada (relative get, absolute @ JDK13 final String b2_str = new String(b2_bytes, StandardCharsets.UTF_8); CPUtils.fprintf_td(System.err, "test01_enc_dec_file_ok.2c: b2: '%s', len %d/%d\n", b2_str, b2_str.length(), b2.limit()); } } }

Definition at line 139 of file TestMemBuffers00.java.

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The documentation for this class was generated from the following file:

• jaulib/test/java/jau/test/io/TestMemBuffers00.java