System and method for testing distributed systems

• US 5,544,310 A
• Filed: 10/04/1994
• Issued: 08/06/1996
• Est. Priority Date: 10/04/1994
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Madduri, Hari H., Forman, Ira R.
• Primary Examiner(s): Beausoliel, Jr., Robert W.
• Assistant Examiner(s): Decady, Albert
• Application Number:
  US08/318,017
• Time in Patent Office: 672 Days
• Field of Search: 395/575, 395/200, 395/650, 395/183.01, 395/183.07, 395/183.14, 395/200.02, 395/200.05, 395/, 364/242.94, 364/242.95, 364/242.96, 371/20.4, 371/19, 379/219
• US Class Current: 714/31
• CPC Class Codes: G06F 11/3414 Workload generation, e.g. scripts, playback
• CPC Class Codes: G06F 11/3672 Test management

Abstract

In a distributed data processing system or network testing a distributed processing program is achieved by a test manager and a test scenario. Functionally, the test manager reads the test scenario to identify processes of the system to be tested. The identified processes then read relevant portions of the test scenario and executes such portions. While the processes are executing the scenario portions, the test manager monitors resulting data from each process. If the resulting data does not match an expected data value, the test manager flags an error regarding the process that produced the errant data.

Claims

1. A method for testing a distributed processing system program that is operable within a distributed processing system having a plurality of processing devices, the method comprising the steps of:

a) reading, by a test manager, a scenario file to identify processes of the distributed processing system program to be tested, wherein the scenario file includes identity of the processes and a sequence of testing events relating to the distributed processing system program;

b) starting, by the test manager, the processes on at least one of the plurality of processing devices;

c) reading, by each of the processes, respective portions of the scenario file;

d) performing, by each of the processes, the respective portions of the scenario file; and

e) monitoring, by the test manager, outputted values of each of the processes to determine when one of the processes outputs a value that is not as expected.

2. The method of claim 1, wherein step (d) further comprises:

generating, by each of the processes, respective objects, wherein each of the processes has at least one of the respective objects associated therewith;

sending, by one of the processes, a message to the at least one respective object associated therewith, wherein the message invokes a method on the at least one respective object; and

producing, by the at least one respective object, a resulting value of the outputted values in response to the message.

3. The method of claim 2 further comprises:

sending, by remaining processes, messages to remaining respective objects;

producing, by the remaining respective objects, respective resulting values;

routing, by a process of the processes, one of the respective resulting values to another one of the processes; and

when the one of the respective resulting values is received, processing, by the another one of the processes, the one of the respective resulting values to produce another resulting value of the outputted values.

4. The method of claim 3 further comprises:

when the one of the respective resulting values is not received, producing, by the test manager, an error message indicating that the another one of the processes did not receive the one of the respective resulting values.

5. A system for testing a distributed processing program implemented within a distributed processing system comprising a plurality of data processors coupled by a communications network, said system for testing comprising:

retrieval means for retrieving a scenario from said distributed processing system, wherein said scenario exercises at least one component of said distributed processing program;

identifying means for identifying the at least one component of the distributed processing program from the scenario;

starting means for starting exercising of the at least one component as defined by a respective portion of the scenario; and

detecting means for detecting when a result produced by the at least one component, while being exercised by the scenario, is not as expected.

6. The system as recited in claim 5, wherein said distributed processing system implements a replication framework.

7. The system as recited in claim 5, wherein the retrieval means further functions to:

retrieve the scenario from a storage means coupled to said distributed processing system.

8. The system as recited in claim 7, wherein said scenario is in a form of an ASCII text file.

9. The system as recited in claim 7, wherein starting means further functions to:

starting a plurality of processes as the at least one component, wherein each of said plurality of processes retrieves at least a portion of said scenario, said plurality of processes implemented within an object-oriented programming environment, said plurality of processes creating at least one object for invoking a method thereupon to produce a value, wherein the value is monitored by the deleting means.

10. The system as recited in claim 9, wherein said plurality of processes create a plurality of objects that communicate as a result of a replication framework implemented within said distributed processing system.

11. A distributed processing system, comprising:

a communications network interconnecting a plurality of data processing devices;

distributed storage means for storing a distributed processing program wherein the distributed storage means resides within at least some of said plurality of data processing devices; and

means for storing a script comprising a text file, said storing means coupled to said communications network;

wherein at least one of said plurality of data processing devices comprises;

means for coupling said at least one of said plurality of data processing device to said communications network;

processor means for;

retrieving the script;

reading the script to identify processes of the distributed processing program to be exercised;

starting the processes on at least one of the plurality of data processing devices to execute respective portions of the script; and

monitoring results from the processes to determine when one of the results is not as expected.

12. A computer readable medium for storing programming instructions, that, when read by a computer which is affiliated with a distributed processing system, causes the computer to perform a test on a distributed processing program that is operable on the distributed processing system, the computer readable medium comprises:

retrieve storage means for storing program instructions that cause the computer to retrieve a test scenario from the distributed processing system;

start storage means for storing program instructions that cause the computer to identify processes of the distributed processing program to be tested by the test scenario and to start at least one processing device of the distributed processing system to support the processes;

read means for storing program instructions that cause the at least one processing device to read respective portions of the test scenario for each of the processes;

object means for storing program instructions that cause the at least one processing device to create an object for each of the processes;

invoke means for storing program instructions that cause the at least one processing device to invoke a method upon the object for each of the processes to create resulting values; and

valid means for storing program instructions that cause the computer to determine when one of the resulting values is not as expected.

13. The computer readable medium of claim 12 further comprises:

communication means for storing program instructions that cause the at least one processing device to communicate one of the resulting values from one object to another object; and

valid communication means for storing program instructions that cause the computer to determine when the one of the resulting values is not received by the another object.

14. The computer readable medium of claim 13 further comprises:

means for storing program instructions that cause the computer to determine when the one of the resulting values received by the another object is not as expected.