UnicodeEscaper e = new PercentEscaper("%", false);
    assertThat(e.escape("foo|bar")).isEqualTo("foo%7Cbar");
    assertThat(e.escape("foo%7Cbar")).isEqualTo("foo%7Cbar"); // idempotent
  }

  /** Test that giving a null 'safeChars' string causes a {@link NullPointerException}. */
  @SuppressWarnings("nullness") // test of a bogus call
  public void testBadArguments_null() {

# Get Current User { #get-current-user }

In the previous chapter the security system (which is based on the dependency injection system) was giving the *path operation function* a `token` as a `str`:

{* ../../docs_src/security/tutorial001_an_py310.py hl[12] *}

But that is still not that useful.

Let's make it give us the current user.

## Create a user model { #create-a-user-model }

First, let's create a Pydantic user model.

	  token: "Bearer xxxxx" # optional authentication token for the notification endpoint

	retry:
	  attempts: 10 # number of retries for the job before giving up
	  delay: "500ms" # least amount of delay between each retry
```

You can create and run multiple 'replication' jobs at a time there are no predefined limits set.

## Batch Jobs Terminology

### Job

  public final double get() {
    return longBitsToDouble(value.get());
  }

  /**
   * Sets to the given value.
   *
   * @param newValue the new value
   */
  public final void set(double newValue) {
    long next = doubleToRawLongBits(newValue);
    value.set(next);
  }

  /**
   * Eventually sets to the given value.
   *
   * @param newValue the new value
   */
  public final void lazySet(double newValue) {

* `docs`: Docs
    * Changes in docs. This includes updating the docs, fixing typos. But it doesn't include changes to translations.
    * You can normally quickly detect it by going to the "Files changed" tab in the PR and checking if the updated file(s) starts with `docs/en/docs`. The original version of the docs is always in English, so in `docs/en/docs`.

### Summary { #summary }

I used to say I didn't like history that much... and look at me now giving "tech history" lessons. 😅

        ensurePositive(xSumOfSquaresOfDeltas * ySumOfSquaresOfDeltas);
    return ensureInUnitRange(sumOfProductsOfDeltas / Math.sqrt(productOfSumsOfSquaresOfDeltas));
  }

  /**
   * Returns a linear transformation giving the best fit to the data according to <a
   * href="http://mathworld.wolfram.com/LeastSquaresFitting.html">Ordinary Least Squares linear

        // Arrange
        stubAcquireReturnsSelf();
        List<FileEntry[]> pages = List.of(new FileEntry[][] { new FileEntry[] {} });

        // Create iterator where open() returns null by giving null initial
        TestIterator it = TestIterator.create(tree, parent, "*", null, 0, null, pages);

        // Assert
        assertFalse(it.hasNext(), "No next when opened with null initial");

        ensurePositive(xSumOfSquaresOfDeltas * ySumOfSquaresOfDeltas);
    return ensureInUnitRange(sumOfProductsOfDeltas / Math.sqrt(productOfSumsOfSquaresOfDeltas));
  }

  /**
   * Returns a linear transformation giving the best fit to the data according to <a
   * href="http://mathworld.wolfram.com/LeastSquaresFitting.html">Ordinary Least Squares linear

			}
			buf = append(buf, c)
		}

		f := strings.Fields(string(buf))

		// Turn relative (PC) into absolute (PC) automatically,
		// so that most branch instructions don't need comments
		// giving the absolute form.
		if len(f) > 0 && strings.Contains(printed, "(PC)") {
			index := len(f) - 1
			suf := "(PC)"
			for !strings.HasSuffix(f[index], suf) {
				index--
				suf = "(PC),"
			}