public virtual void TestReaderGetClosest()
{
string TestMethodKey = "testReaderWithWrongKeyClass.mapfile";
MapFile.Writer writer = null;
MapFile.Reader reader = null;
try
{
writer = CreateWriter(TestMethodKey, typeof(IntWritable), typeof(Text));
for (int i = 0; i < 10; i++)
{
writer.Append(new IntWritable(i), new Text("value" + i));
}
writer.Close();
reader = CreateReader(TestMethodKey, typeof(Text));
reader.GetClosest(new Text("2"), new Text(string.Empty));
NUnit.Framework.Assert.Fail("no excepted exception in testReaderWithWrongKeyClass !!!"
);
}
catch (IOException)
{
}
finally
{
/* Should be thrown to pass the test */
IOUtils.Cleanup(null, writer, reader);
}
}
public virtual void TestGetClosestOnCurrentApi()
{
string TestPrefix = "testGetClosestOnCurrentApi.mapfile";
MapFile.Writer writer = null;
MapFile.Reader reader = null;
try
{
writer = CreateWriter(TestPrefix, typeof(Text), typeof(Text));
int FirstKey = 1;
// Test keys: 11,21,31,...,91
for (int i = FirstKey; i < 100; i += 10)
{
Text t = new Text(Extensions.ToString(i));
writer.Append(t, t);
}
writer.Close();
reader = CreateReader(TestPrefix, typeof(Text));
Text key = new Text("55");
Text value = new Text();
// Test get closest with step forward
Text closest = (Text)reader.GetClosest(key, value);
Assert.Equal(new Text("61"), closest);
// Test get closest with step back
closest = (Text)reader.GetClosest(key, value, true);
Assert.Equal(new Text("51"), closest);
// Test get closest when we pass explicit key
Text explicitKey = new Text("21");
closest = (Text)reader.GetClosest(explicitKey, value);
Assert.Equal(new Text("21"), explicitKey);
// Test what happens at boundaries. Assert if searching a key that is
// less than first key in the mapfile, that the first key is returned.
key = new Text("00");
closest = (Text)reader.GetClosest(key, value);
Assert.Equal(FirstKey, System.Convert.ToInt32(closest.ToString
()));
// Assert that null is returned if key is > last entry in mapfile.
key = new Text("92");
closest = (Text)reader.GetClosest(key, value);
NUnit.Framework.Assert.IsNull("Not null key in testGetClosestWithNewCode", closest
);
// If we were looking for the key before, we should get the last key
closest = (Text)reader.GetClosest(key, value, true);
Assert.Equal(new Text("91"), closest);
}
finally
{
IOUtils.Cleanup(null, writer, reader);
}
}
public virtual void TestGetClosest()
{
// Write a mapfile of simple data: keys are
Path dirName = new Path(TestDir, "testGetClosest.mapfile");
FileSystem fs = FileSystem.GetLocal(conf);
Path qualifiedDirName = fs.MakeQualified(dirName);
// Make an index entry for every third insertion.
MapFile.Writer.SetIndexInterval(conf, 3);
MapFile.Writer writer = null;
MapFile.Reader reader = null;
try
{
writer = new MapFile.Writer(conf, fs, qualifiedDirName.ToString(), typeof(Text),
typeof(Text));
// Assert that the index interval is 1
Assert.Equal(3, writer.GetIndexInterval());
// Add entries up to 100 in intervals of ten.
int FirstKey = 10;
for (int i = FirstKey; i < 100; i += 10)
{
string iStr = Extensions.ToString(i);
Text t = new Text(Runtime.Substring("00", iStr.Length) + iStr);
writer.Append(t, t);
}
writer.Close();
// Now do getClosest on created mapfile.
reader = new MapFile.Reader(qualifiedDirName, conf);
Text key = new Text("55");
Text value = new Text();
Text closest = (Text)reader.GetClosest(key, value);
// Assert that closest after 55 is 60
Assert.Equal(new Text("60"), closest);
// Get closest that falls before the passed key: 50
closest = (Text)reader.GetClosest(key, value, true);
Assert.Equal(new Text("50"), closest);
// Test get closest when we pass explicit key
Text Twenty = new Text("20");
closest = (Text)reader.GetClosest(Twenty, value);
Assert.Equal(Twenty, closest);
closest = (Text)reader.GetClosest(Twenty, value, true);
Assert.Equal(Twenty, closest);
// Test what happens at boundaries. Assert if searching a key that is
// less than first key in the mapfile, that the first key is returned.
key = new Text("00");
closest = (Text)reader.GetClosest(key, value);
Assert.Equal(FirstKey, System.Convert.ToInt32(closest.ToString
()));
// If we're looking for the first key before, and we pass in a key before
// the first key in the file, we should get null
closest = (Text)reader.GetClosest(key, value, true);
NUnit.Framework.Assert.IsNull(closest);
// Assert that null is returned if key is > last entry in mapfile.
key = new Text("99");
closest = (Text)reader.GetClosest(key, value);
NUnit.Framework.Assert.IsNull(closest);
// If we were looking for the key before, we should get the last key
closest = (Text)reader.GetClosest(key, value, true);
Assert.Equal(new Text("90"), closest);
}
finally
{
IOUtils.Cleanup(null, writer, reader);
}
}