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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.inputmethod.latin;
import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.SmallTest;
@SmallTest
public class ForgettingCurveTests extends AndroidTestCase {
public void testFcToFreq() {
for (int i = 0; i < Byte.MAX_VALUE; ++i) {
final byte fc = (byte)i;
final int e = UserHistoryForgettingCurveUtils.fcToElapsedTime(fc);
final int c = UserHistoryForgettingCurveUtils.fcToCount(fc);
final int l = UserHistoryForgettingCurveUtils.fcToLevel(fc);
final byte fc2 = UserHistoryForgettingCurveUtils.calcFc(e, c, l);
assertEquals(fc, fc2);
}
byte fc = 0;
int l;
for (int i = 0; i < 4; ++i) {
for (int j = 0; j < (UserHistoryForgettingCurveUtils.COUNT_MAX + 1); ++j) {
fc = UserHistoryForgettingCurveUtils.pushCount(fc, true);
}
l = UserHistoryForgettingCurveUtils.fcToLevel(fc);
assertEquals(l, Math.max(1, Math.min(i + 1, 3)));
}
fc = 0;
for (int i = 0; i < 4; ++i) {
for (int j = 0; j < (UserHistoryForgettingCurveUtils.COUNT_MAX + 1); ++j) {
fc = UserHistoryForgettingCurveUtils.pushCount(fc, false);
}
l = UserHistoryForgettingCurveUtils.fcToLevel(fc);
assertEquals(l, Math.min(i + 1, 3));
}
for (int i = 0; i < 4; ++i) {
for (int j = 0; j < (UserHistoryForgettingCurveUtils.ELAPSED_TIME_MAX + 1); ++j) {
fc = UserHistoryForgettingCurveUtils.pushElapsedTime(fc);
}
l = UserHistoryForgettingCurveUtils.fcToLevel(fc);
assertEquals(l, Math.max(0, 2 - i));
}
}
}
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