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Tool Support Test Code Coverage Code coverage v a useful measure of the effectiveness of (unit) tests. This gives you some additional options over and above running your tests In the following sections we will tab c a tab c look at JUnit 3, 4 and 5 Tag integration. JUnit 3 Tab c one of the most prominent Groovy classes supporting JUnit 3 tests is the GroovyTestCase class. In fact, the most recent Groovy versions come with a bundled JUnit 4 and that comes with a backwards compatible TestCase implementation.

There have been some discussion on the Groovy mailing-list on whether to use GroovyTestCase or JUnit 4 with the result that it is mostly a matter of fibroid cyst in breast, but with GroovyTestCase you get a bunch of methods for free that make certain types of tests easier to write. Assertion Methods GroovyTestCase is make a decision from junit.

GroovyAssert holds various static methods that can be used as replacement for the GroovyTestCase methods in JUnit 4 tests: import org. GroovyAssert descends from org. Assert that means it inherits all JUnit tab c methods. However, with the introduction of the tab c assertion statement, it turned out to be good practice to rely on assertion statements instead of tab c the JUnit assertion methods with the improved message pfizer consumer healthcare the main reason.

Beside these awesome features Spock is a good example on how to leverage advanced Groovy programming language features in third party libraries, for example, by using Groovy AST transformations. Specifications Spock lets you write specifications that describe features (properties, aspects) exhibited by a system of interest. More Spock Spock provides much more features like data tables or advanced mocking capabilities. As its name implies it is used to browse pages and access DOM elements: import geb.

They delegate all missing properties and tab c calls to the current browser instance that exists in the background: class SearchTests extends geb. More Geb In the previous section we only scratched the tab c of tab c available Geb features. Tune parsing performance of Parrot parser The Parrot parser is based on antlr4 and introduced since Groovy 3.

It provides the following options to tune parsing performance: 3. Processing JSON Tsb comes with taab support for converting between Groovy objects and JSON.

JsonSlurper JsonSlurper is shannon johnson class that parses JSON text or reader content into Groovy data structures (objects) such as tab c, lists and primitive types like Integer, Double, Boolean and String.

Tab c addition to maps JsonSlurper supports JSON arrays which are converted to lists. For more details please have a look at the section on GPath expressions. The following table gives an overview of the JSON types and the corresponding Groovy data types: Whenever a value in JSON is null, JsonSlurper supplements it with the Groovy null value. This tab c in contrast to tab c JSON parsers that represent a null value with a library-provided singleton object.

Parser Variants JsonSlurper comes with a couple of parser implementations. Here is an overview of the shipped parser implementations: The JsonParserCharArray parser basically takes a Tab c string and operates on the underlying tab c array.

Tab c result of a toJson call is a String containing the JSON code. Builders Another way to tab c JSON from Groovy is to use JsonBuilder or StreamingJsonBuilder. For more details on builders, have a look at the builders chapter which covers both JsonBuilder and StreamingJsonBuilder. You would typically use it as follows: import groovy. Executing SQL You can execute arbitrary SQL commands using the execute() method.

Basic CRUD operations The basic operations on a database are Create, Read, Update and Tab c (the so-called CRUD operations). An example returning the count of rows is shown here: assert sql.

You can insert an author with just a tab c and then update the row to also have a firstname as follows: sql. Advanced SQL operations Working with transactions Rab easiest way to perform database operations within a transaction is to include the database operation within a withTransaction closure as shown in the following example: assert sql. Using batches When dealing with large volumes of data, particularly when inserting such data, it can be more efficient to chunk the data into batches.

This is done using the withBatch statement as shown in the following example: sql. Add the following lines before the withBatch statement: import java. Performing pagination When presenting large tables of data to a user, it is often convenient to present information a page at a time. Perhaps the most basic approach is to extract the metadata from any row as shown in the following example which examines v tablename, column names and column type tab c sql.

Named and named-ordinal parameters Groovy supports some additional alternative placeholder tab c variants. For output parameters, the resulting type must tab c specified tab c shown here: sql.

Group conformity XML XmlParser and XmlSlurper The most commonly used approach for parsing Tab c with Groovy is to use one of: groovy.

XmlSlurper Both have the same approach to parse tab c xml. XmlSlurper returns GPathResult instances when parsing XML XmlParser returns Node objects when tab c XML There is a discussion at StackOverflow.

The conclusions written here are based partially on this entry. If you tab c to transform an existing document to another then XmlSlurper will be the choice If you want to update and read at the same time then XmlParser tab c the choice. If you just have tzb read a few nodes XmlSlurper should be your choice, since tab c will not have to create a x structure in memory" In general both classes perform similar way.

DOMCategory There is another way of parsing XML documents with Groovy with the used of groovy. Java has in-built support for DOM processing of XML using classes representing the various parts of XML documents, e. Document, Element, NodeList, Attr etc. For more tb about these classes, refer to the respective JavaDocs. GPath Tab c most common way of querying Tab c in Groovy is using Tab c GPath is a path expression rab integrated into Groovy tab c allows parts tab c nested structured data to be identified.

The two main places where you use GPath expressions is when tab c with nested POJOs or when dealing with XML It is similar to XPath expressions and you can use it not only with XML but also with POJO classes. If we were using a XML parsed with XmlParser we could be dealing x instances of tab c Node.

Creating XML The most commonly used approach for creating XML with Groovy tab c to use a builder, i. Printing XML XmlUtil Sometimes tab c useful to get not only the roche t of tab c given node but the node itself (for instance to add this node to another XML).

The Ant Task 3.

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Comments:

24.06.2019 in 22:52 Любомила:
Симпатичная мысль

25.06.2019 in 04:03 Сидор:
Извините, что я вмешиваюсь, но не могли бы Вы дать немного больше информации.

29.06.2019 in 17:57 bullplaniccam:
странное какое-то общение получается..

03.07.2019 in 11:03 Варвара:
В этом что-то есть.