Agile Android

!readme.md

#Data based junit test.

from Pragmatic unit testing in java with junit

SampleData.txt

# Simple tests:
#
9 789
9 987
9 989
#
# Negative number tests: #
-7 -7 -8 -9
-7 -8 -7 -8
-7 -9 -7 -8
#
# Mixture:
#
7 -9-7-8764
0 -109-74
#
# Boundary conditions:
#
11
00
2147483647 2147483647 -2147483648 -2147483648

TestLargestDataFile.java

import junit.framework.*;
import java.io.*;
import java.util.ArrayList; import java.util.StringTokenizer;

public class TestLargestDataFile extends TestCase {
  
  public TestLargestDataFile(String name) { super(name);}
  /** Run all the tests in testdata.txt (does not test exception case).
   * We’ll get an error if any of the file I/O goes wrong.
   */
  public void testFromFile() throws Exception {
    String line;
    BufferedReader rdr = new BufferedReader(new FileReader( "SampleData.txt"));
    
    while ((line = rdr.readLine()) != null) {
      if (line.startsWith("#")) { 
         continue; // Ignore comments continue;
      }
      StringTokenizer st = new StringTokenizer(line); 
      if (!st.hasMoreTokens()) {
        continue; // Blank line
      }
      // Get the expected value
      String val = st.nextToken();
      int expected = Integer.valueOf(val).intValue();
      // And the arguments to Largest
      ArrayList argument_list = new ArrayList();
      while (st.hasMoreTokens()) { argument_list.add(Integer.valueOf(st.nextToken()));
      }
      // Transfer object list into native array
      int[] arguments = new int[argument_list.size()]; 
      for (int i=0; i < argument_list.size(); i++) {
          arguments[i] = ((Integer)argument_list. get(i)).intValue();
      }
      // And run the assert
      assertEquals(expected, Largest.largest(arguments));
    }
  }
}