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Move and slightly add to new GenericGFPoly tests

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This commit is contained in:
Sean Owen 2018-06-02 22:51:28 -05:00
parent 3778715156
commit 7ff131b3cc
3 changed files with 47 additions and 9 deletions
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4
core/src/main/java/com/google/zxing/common/reedsolomon/GenericGFPoly.java
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@ -225,8 +225,8 @@ final class GenericGFPoly {
@Override
public String toString() {
if (isZero()) {
return "0";
if (getDegree() == 0) {
return Integer.toString(getCoefficient(0));
}
StringBuilder result = new StringBuilder(8 * getDegree());
for (int degree = getDegree(); degree >= 0; degree--) {

45
core/src/test/java/com/google/zxing/common/reedsolomon/GenericGFPolyTestCase.java Normal file
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@ -0,0 +1,45 @@
/*
* Copyright 2018 ZXing authors
*
* 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.google.zxing.common.reedsolomon;
import org.junit.Assert;
import org.junit.Test;
public final class GenericGFPolyTestCase extends Assert {
private static final GenericGF FIELD = GenericGF.QR_CODE_FIELD_256;
@Test
public void testPolynomialString() {
assertEquals("0", FIELD.getZero().toString());
assertEquals("-1", FIELD.buildMonomial(0, -1).toString());
GenericGFPoly p = new GenericGFPoly(FIELD, new int[] {3, 0, -2, 1, 1});
assertEquals("a^25x^4 - ax^2 + x + 1", p.toString());
}
@Test
public void testZero() {
assertEquals(FIELD.getZero(),FIELD.buildMonomial(1, 0));
assertEquals(FIELD.getZero(), FIELD.buildMonomial(1, 2).multiply(0));
}
@Test
public void testEvaluate() {
assertEquals(3, FIELD.buildMonomial(0, 3).evaluateAt(0));
}
}

7
core/src/test/java/com/google/zxing/common/reedsolomon/ReedSolomonTestCase.java
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@ -393,13 +393,6 @@ public final class ReedSolomonTestCase extends Assert {
testEncodeDecodeRandom(GenericGF.AZTEC_DATA_12, 3072, 1023);
}
@Test
public void testPolynomialString() {
assertEquals("0", GenericGF.QR_CODE_FIELD_256.getZero().toString());
GenericGFPoly p = new GenericGFPoly(GenericGF.QR_CODE_FIELD_256, new int[] {3, 0, -2, 1, 1});
assertEquals("a^25x^4 - ax^2 + x + 1", p.toString());
}
public static void corrupt(int[] received, int howMany, Random random, int max) {
BitSet corrupted = new BitSet(received.length);
for (int j = 0; j < howMany; j++) {