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Have random words stick to a restricted (random) charset

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Change-Id: Ib4045ebc9659f1b60183f2356e60e449d62c5be9
This commit is contained in:
Jean Chalard 2013-07-04 16:59:40 +09:00
parent cac66f29eb
commit cea80fd955
1 changed files with 26 additions and 14 deletions
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40
tests/src/com/android/inputmethod/latin/makedict/BinaryDictIOTests.java
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@ -52,6 +52,7 @@ import java.util.Set;
public class BinaryDictIOTests extends AndroidTestCase {
private static final String TAG = BinaryDictIOTests.class.getSimpleName();
private static final int DEFAULT_MAX_UNIGRAMS = 100;
private static final int DEFAULT_CODE_POINT_SET_SIZE = 50;
private static final int UNIGRAM_FREQ = 10;
private static final int BIGRAM_FREQ = 50;
private static final int TOLERANCE_OF_BIGRAM_FREQ = 5;
@ -81,7 +82,8 @@ public class BinaryDictIOTests extends AndroidTestCase {
Log.e(TAG, "Testing dictionary: seed is " + seed);
final Random random = new Random(seed);
sWords.clear();
generateWords(maxUnigrams, random);
final int[] codePointSet = generateCodePointSet(DEFAULT_CODE_POINT_SET_SIZE, random);
generateWords(maxUnigrams, random, codePointSet);
for (int i = 0; i < sWords.size(); ++i) {
sChainBigrams.put(i, new ArrayList<Integer>());
@ -96,6 +98,23 @@ public class BinaryDictIOTests extends AndroidTestCase {
}
}
private int[] generateCodePointSet(final int codePointSetSize, final Random random) {
final int[] codePointSet = new int[codePointSetSize];
for (int i = codePointSet.length - 1; i >= 0; ) {
final int r = Math.abs(random.nextInt());
if (r < 0) continue;
// Don't insert 0~0x20, but insert any other code point.
// Code points are in the range 0~0x10FFFF.
final int candidateCodePoint = (int)(0x20 + r % (Character.MAX_CODE_POINT - 0x20));
// Code points between MIN_ and MAX_SURROGATE are not valid on their own.
if (candidateCodePoint >= Character.MIN_SURROGATE
&& candidateCodePoint <= Character.MAX_SURROGATE) continue;
codePointSet[i] = candidateCodePoint;
--i;
}
return codePointSet;
}
// Utilities for test
/**
@ -131,28 +150,20 @@ public class BinaryDictIOTests extends AndroidTestCase {
/**
* Generates a random word.
*/
private String generateWord(final Random random) {
private String generateWord(final Random random, final int[] codePointSet) {
StringBuilder builder = new StringBuilder("a");
int count = random.nextInt() % 30; // Arbitrarily 30 chars max
while (count > 0) {
final long r = Math.abs(random.nextInt());
if (r < 0) continue;
// Don't insert 0~0x20, but insert any other code point.
// Code points are in the range 0~0x10FFFF.
final int candidateCodePoint = (int)(0x20 + r % (Character.MAX_CODE_POINT - 0x20));
// Code points between MIN_ and MAX_SURROGATE are not valid on their own.
if (candidateCodePoint >= Character.MIN_SURROGATE
&& candidateCodePoint <= Character.MAX_SURROGATE) continue;
builder.appendCodePoint(candidateCodePoint);
builder.appendCodePoint(codePointSet[Math.abs(random.nextInt()) % codePointSet.length]);
--count;
}
return builder.toString();
}
private void generateWords(final int number, final Random random) {
private void generateWords(final int number, final Random random, final int[] codePointSet) {
final Set<String> wordSet = CollectionUtils.newHashSet();
while (wordSet.size() < number) {
wordSet.add(generateWord(random));
wordSet.add(generateWord(random, codePointSet));
}
sWords.addAll(wordSet);
}
@ -560,8 +571,9 @@ public class BinaryDictIOTests extends AndroidTestCase {
// Test a word that isn't contained within the dictionary.
final Random random = new Random((int)System.currentTimeMillis());
final int[] codePointSet = generateCodePointSet(DEFAULT_CODE_POINT_SET_SIZE, random);
for (int i = 0; i < 1000; ++i) {
final String word = generateWord(random);
final String word = generateWord(random, codePointSet);
if (sWords.indexOf(word) != -1) continue;
runGetTerminalPosition(buffer, word, i, false);
}