Java common knowledge points of test and Development Department classes

Two languages required for testing: Java,python

Test development: Develop test scripts, develop test frameworks

Java needs to master the content: Basic syntax, Java object-oriented concepts, Java common classes, basic test framework

Java Common classes:

• IO related classes, including:

BYTE stream Inputstream,outputstream, audio video, etc.

Character Stream Reader,writer

InputStreamReader, byte-to-character bridge

OutputStreamWriter, character-to-byte bridge

• Collection Related classes:

Collection (interface)->list-> (ArrayList, linkedlist,vector->stack), Set

Map (interface) (Hashtable, HashMap, Weakhashmap)

Includes ArrayList implements a variable-size array that allows all elements, including null,arraylist non-synchronous

Vector similar to ArrayList, synchronous

Hashtable inherits the map interface, implements a hash table of key-value mappings, and any non-empty object can be a key or value, which is synchronous

HashMap is similar to Hashtable, except that HashMap is non-synchronous and allows NULL, which is null value and NULL key

• Multithreading

Class Name extends Thread

Class name implements Runnable

Recommendation: Using interfaces

Benefits: Avoid single inheritance restrictions, not conducive to resource sharing

Basic Test Framework

• JUNIT3: The purpose of junit design is to analyze code units

• JUNIT4: Supports annotation compared to JUNIT3

• TestNG: Intended use for advanced testing, support labeling, surface notation similar to JUNIT4

• Common assertions: Assertequals,asserttrue/false,assertnull/notnull

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Java common knowledge points of test and Development Department classes