Test coverage improvement

[levelibeeka]

By definition, FizzBuzz requires all numbers from 0 to 100 processed. Therefore the following test is unacceptably weak:
doFizzBuzz(1, "1\n"); doFizzBuzz(2, "1\n2\n"); doFizzBuzz(3, "1\n2\nFizz\n"); doFizzBuzz(4, "1\n2\nFizz\n4\n"); doFizzBuzz(5, "1\n2\nFizz\n4\nBuzz\n"); doFizzBuzz(6, "1\n2\nFizz\n4\nBuzz\nFizz\n"); doFizzBuzz(7, "1\n2\nFizz\n4\nBuzz\nFizz\n7\n"); doFizzBuzz(8, "1\n2\nFizz\n4\nBuzz\nFizz\n7\n8\n"); doFizzBuzz(9, "1\n2\nFizz\n4\nBuzz\nFizz\n7\n8\nFizz\n"); doFizzBuzz(10, "1\n2\nFizz\n4\nBuzz\nFizz\n7\n8\nFizz\nBuzz\n"); doFizzBuzz(11, "1\n2\nFizz\n4\nBuzz\nFizz\n7\n8\nFizz\nBuzz\n11\n"); doFizzBuzz(12, "1\n2\nFizz\n4\nBuzz\nFizz\n7\n8\nFizz\nBuzz\n11\nFizz\n"); doFizzBuzz(13, "1\n2\nFizz\n4\nBuzz\nFizz\n7\n8\nFizz\nBuzz\n11\nFizz\n13\n"); doFizzBuzz(14, "1\n2\nFizz\n4\nBuzz\nFizz\n7\n8\nFizz\nBuzz\n11\nFizz\n13\n14\n"); doFizzBuzz(15, "1\n2\nFizz\n4\nBuzz\nFizz\n7\n8\nFizz\nBuzz\n11\nFizz\n13\n14\nFizzBuzz\n"); doFizzBuzz(16, "1\n2\nFizz\n4\nBuzz\nFizz\n7\n8\nFizz\nBuzz\n11\nFizz\n13\n14\nFizzBuzz\n16\n");
By adding more lines like the above to to this test, coverage could be improved significantly.

[commonquail]

We can use something like the following program to quickly generate as large a sequence of doFizzBuzz(int, String) as QA deems necessary.

import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.PrintStream;

import com.seriouscompany.business.java.fizzbuzz.packagenamingpackage.impl.FizzBuzz;

public final class A {
    public static void main(final String[] args) throws Exception {
        final PrintStream sysout = System.out;
        final FizzBuzz fb = new FizzBuzz();
        final StringBuilder result = new StringBuilder();

        for (int n = 1; n <= 100; ++n) {
            final ByteArrayOutputStream baos = new ByteArrayOutputStream();
            final BufferedOutputStream bos = new BufferedOutputStream(baos);

            System.setOut(new PrintStream(bos));
            fb.fizzBuzz(n);
            System.out.flush();

            result.append(String.format("doFizzBuzz(%d, \"%s\");\n",
                n,
                baos.toString().replaceAll("\n", "\\\\n")));
        }

        sysout.println(result.toString());
    }
}

[qoh]

@commonquail Do note that such a program would need its own tests as well

[treeowl]

A proper enterprise package will certainly include a QuickCheck test suite with an exhaustive set of appropriate properties.