Class RandomJson

java.lang.Object
ca.marcusdunn.jsonlens.testkit.RandomJson
public final class RandomJson extends Object

Makes random JSON texts (RFC 8259) from a seed. The same seed gives the same texts.

The texts have the cases that models often get wrong: escapes, non-ASCII characters and surrogate pairs, the empty name, numbers with an exponent or a fraction, integers larger than a long, equal numbers in different forms such as 100 and 1E+2, and empty and nested containers. The member names of each object are unique.

RandomJson random = RandomJson.withSeed(42); // The same seed gives the same documents.
for (int i = 0; i < 100; i++) {
    Object document = parse(random.next());
    assertEquals(List.of(), verifier.verify(document));
}

  • Method Details

    • withSeed

      public static RandomJson withSeed(long seed)
      Returns a generator with a seed.
      Parameters:
      seed - the seed
      Returns:
      a new generator

    • next

      public String next()
      Makes the next JSON text. Its root is an object or an array.
      Returns:
      a JSON text