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what's important

"consistent indentation style was one of the most statistically significant indicators of low bug density."

(Martin, Robert C. (2008-08-01). Clean Code: A Handbook of Agile Software Craftsmanship . Prentice Hall. Kindle Edition. )

best discovery since 10/12/1492

без слов

a couple of words on error generation in mocks

Just wrote a couple of methods in my main mock class.

public void failingOn(String regex) {
  this.failureCondition = regex;
}

public void maybeFail(Object...objects) throws HBaseException {
  if (failureCondition != null) {
            String s = Arrays.asList(objects).toString();
    if (s.matches(failureCondition)) {
      throw new HBaseException("Congratulations, you hit the jackpot today: " + s);
    }
  }
}

and most of the methods look like this:

@Override
public void bulkDelete(String tableName, Collection rowKeys, String columnFamily) throws HBaseException {
  maybeFail("bulkDelete", tableName, rowKeys, columnFamily);
  table(tableName).family(columnFamily).delete(rowKeys);
}

Now in the test I write stuff like this:

@Test    
public void testPut_replicating_withErrors() throws Exception {
  MockHBaseOperations cluster2 = new MockHBaseOperations();
  cluster2.failingOn("\\[sendToCluster, BadTable,.*");
  ...
}

... do you need explanations on how it works?

What I personally enjoy here is the leisure JavaScript coding style, where you just join the arguments, not giving a fuck about their types.

what Bjarne said

Bjarne Stroustrup, inventor of C++ and author of The C++ Programming Language:

"I like my code to be elegant and efficient. The logic should be straightforward to make it hard for bugs to hide, the dependencies minimal to ease maintenance, error handling complete according to an articulated strategy, and performance close to optimal so as not to tempt people to make the code messy with unprincipled optimizations. Clean code does one thing well."

(Martin, Robert C. (2008-08-01). Clean Code: A Handbook of Agile Software Craftsmanship (p. 7). Prentice Hall. Kindle Edition. )

(and yes, I do quotes using kindle on my windows laptop)