AtomicInteger existingZero = new AtomicInteger(0);

    // initial map.get()
    when(backingMap.get(KEY)).thenReturn(null);
    // since get returned null, try a putIfAbsent; that fails due to a simulated race
    when(backingMap.putIfAbsent(eq(KEY), isA(AtomicInteger.class))).thenReturn(existingZero);
    // since the putIfAbsent returned a zero, we'll try to replace...

                return new InputStream() {
                    @Override
                    public int read() throws IOException {
                        throw new IOException("Simulated read error");
                    }
                };
            }

            @Override
            public String getUrl() {
                return "http://example.com/error";
            }

      },
      logger = logger,
    )

  /** Runs all tasks that are ready. Used by the test thread only. */
  fun runTasks() {
    advanceUntil(nanoTime)
  }

  /** Advance the simulated clock, then runs tasks that are ready. Used by the test thread only. */
  fun advanceUntil(newTime: Long) {
    taskRunner.assertLockNotHeld()

    taskRunner.withLock {
      check(currentTask == TestThreadSerialTask)

        final InputStream errorStream = new InputStream() {
            @Override
            public int read() throws IOException {
                throw new IOException("Simulated read error");
            }
        };

        try {
            extractor.getText(errorStream, null);
            fail("Expected ExtractException");
        } catch (final ExtractException e) {

        when(mockFuture.actionGet(anyLong(), any(TimeUnit.class))).thenAnswer(invocation -> {
            int count = attemptCount.incrementAndGet();
            if (count <= 5) {
                throw new RuntimeException("Simulated failure #" + count);
            }
            return "Success";
        });

        final String result = fesenClient.get(c -> mockFuture);

        assertEquals("Success", result);

            request.setOffset(1024L);
            request.setRemainingBytes(500);
            request.setWriteFlags(0x01);

            byte[] buffer = new byte[1024];
            int headerStart = 64; // Simulated header start

            // Execute
            int bytesWritten = request.writeBytesWireFormat(buffer, headerStart);

            // Verify structure

                new String[] { SuggestConstants.DEFAULT_ROLE }, null, SuggestItem.Kind.QUERY);

        // Both Document and Query (simulated by setting both frequencies)
        String[][] readings3 = new String[1][];
        readings3[0] = new String[] { "both" };

added to // fipstest.TestConditionals. func CAST(name string, f func() error) { if strings.ContainsAny(name, ",#=:") { panic("fips: invalid self-test name: " + name) } if !Enabled { return } err := f() if name == failfipscast { err = errors.New("simulated CAST failure") } if err != nil { fatal("FIPS 140-3 self-test failed: " + name + ": " + err.Error()) panic("unreachable") } if debug { println("FIPS 140-3 self-test passed:", name) } } // PCT runs the named Pairwise Consistency Test (if operated in...

added to // fipstest.TestConditionals. func CAST(name string, f func() error) { if strings.ContainsAny(name, ",#=:") { panic("fips: invalid self-test name: " + name) } if !Enabled { return } err := f() if name == failfipscast { err = errors.New("simulated CAST failure") } if err != nil { fatal("FIPS 140-3 self-test failed: " + name + ": " + err.Error()) panic("unreachable") } if debug { println("FIPS 140-3 self-test passed:", name) } } // PCT runs the named Pairwise Consistency Test (if operated in...