650 lines
23 KiB
Java
650 lines
23 KiB
Java
/*
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* Copyright (C) 2008 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.primitives;
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import static com.google.common.truth.Truth.assertThat;
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import static java.lang.Float.NaN;
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import com.google.common.annotations.GwtCompatible;
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import com.google.common.annotations.GwtIncompatible;
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import com.google.common.base.Converter;
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import com.google.common.collect.ImmutableList;
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import com.google.common.collect.testing.Helpers;
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import com.google.common.testing.NullPointerTester;
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import com.google.common.testing.SerializableTester;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.List;
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import junit.framework.TestCase;
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/**
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* Unit test for {@link Floats}.
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*
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* @author Kevin Bourrillion
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*/
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@GwtCompatible(emulated = true)
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@SuppressWarnings("cast") // redundant casts are intentional and harmless
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public class FloatsTest extends TestCase {
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private static final float[] EMPTY = {};
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private static final float[] ARRAY1 = {(float) 1};
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private static final float[] ARRAY234 = {(float) 2, (float) 3, (float) 4};
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private static final float LEAST = Float.NEGATIVE_INFINITY;
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private static final float GREATEST = Float.POSITIVE_INFINITY;
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private static final float[] NUMBERS =
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new float[] {
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LEAST,
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-Float.MAX_VALUE,
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-1f,
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-0f,
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0f,
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1f,
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Float.MAX_VALUE,
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GREATEST,
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Float.MIN_NORMAL,
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-Float.MIN_NORMAL,
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Float.MIN_VALUE,
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-Float.MIN_VALUE,
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Integer.MIN_VALUE,
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Integer.MAX_VALUE,
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Long.MIN_VALUE,
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Long.MAX_VALUE
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};
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private static final float[] VALUES = Floats.concat(NUMBERS, new float[] {NaN});
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public void testHashCode() {
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for (float value : VALUES) {
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assertEquals(((Float) value).hashCode(), Floats.hashCode(value));
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}
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}
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public void testIsFinite() {
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for (float value : NUMBERS) {
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assertEquals(!(Float.isInfinite(value) || Float.isNaN(value)), Floats.isFinite(value));
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}
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}
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public void testCompare() {
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for (float x : VALUES) {
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for (float y : VALUES) {
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// note: spec requires only that the sign is the same
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assertEquals(x + ", " + y, Float.valueOf(x).compareTo(y), Floats.compare(x, y));
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}
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}
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}
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public void testContains() {
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assertFalse(Floats.contains(EMPTY, (float) 1));
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assertFalse(Floats.contains(ARRAY1, (float) 2));
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assertFalse(Floats.contains(ARRAY234, (float) 1));
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assertTrue(Floats.contains(new float[] {(float) -1}, (float) -1));
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assertTrue(Floats.contains(ARRAY234, (float) 2));
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assertTrue(Floats.contains(ARRAY234, (float) 3));
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assertTrue(Floats.contains(ARRAY234, (float) 4));
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for (float value : NUMBERS) {
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assertTrue("" + value, Floats.contains(new float[] {5f, value}, value));
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}
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assertFalse(Floats.contains(new float[] {5f, NaN}, NaN));
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}
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public void testIndexOf() {
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assertEquals(-1, Floats.indexOf(EMPTY, (float) 1));
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assertEquals(-1, Floats.indexOf(ARRAY1, (float) 2));
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assertEquals(-1, Floats.indexOf(ARRAY234, (float) 1));
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assertEquals(0, Floats.indexOf(new float[] {(float) -1}, (float) -1));
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assertEquals(0, Floats.indexOf(ARRAY234, (float) 2));
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assertEquals(1, Floats.indexOf(ARRAY234, (float) 3));
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assertEquals(2, Floats.indexOf(ARRAY234, (float) 4));
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assertEquals(
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1, Floats.indexOf(new float[] {(float) 2, (float) 3, (float) 2, (float) 3}, (float) 3));
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for (float value : NUMBERS) {
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assertEquals("" + value, 1, Floats.indexOf(new float[] {5f, value}, value));
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}
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assertEquals(-1, Floats.indexOf(new float[] {5f, NaN}, NaN));
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}
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public void testIndexOf_arrayTarget() {
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assertEquals(0, Floats.indexOf(EMPTY, EMPTY));
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assertEquals(0, Floats.indexOf(ARRAY234, EMPTY));
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assertEquals(-1, Floats.indexOf(EMPTY, ARRAY234));
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assertEquals(-1, Floats.indexOf(ARRAY234, ARRAY1));
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assertEquals(-1, Floats.indexOf(ARRAY1, ARRAY234));
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assertEquals(0, Floats.indexOf(ARRAY1, ARRAY1));
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assertEquals(0, Floats.indexOf(ARRAY234, ARRAY234));
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assertEquals(0, Floats.indexOf(ARRAY234, new float[] {(float) 2, (float) 3}));
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assertEquals(1, Floats.indexOf(ARRAY234, new float[] {(float) 3, (float) 4}));
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assertEquals(1, Floats.indexOf(ARRAY234, new float[] {(float) 3}));
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assertEquals(2, Floats.indexOf(ARRAY234, new float[] {(float) 4}));
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assertEquals(
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1,
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Floats.indexOf(
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new float[] {(float) 2, (float) 3, (float) 3, (float) 3, (float) 3},
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new float[] {(float) 3}));
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assertEquals(
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2,
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Floats.indexOf(
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new float[] {
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(float) 2, (float) 3, (float) 2, (float) 3, (float) 4, (float) 2, (float) 3
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},
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new float[] {(float) 2, (float) 3, (float) 4}));
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assertEquals(
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1,
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Floats.indexOf(
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new float[] {
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(float) 2, (float) 2, (float) 3, (float) 4, (float) 2, (float) 3, (float) 4
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},
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new float[] {(float) 2, (float) 3, (float) 4}));
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assertEquals(
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-1,
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Floats.indexOf(
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new float[] {(float) 4, (float) 3, (float) 2},
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new float[] {(float) 2, (float) 3, (float) 4}));
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for (float value : NUMBERS) {
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assertEquals(
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"" + value,
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1,
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Floats.indexOf(new float[] {5f, value, value, 5f}, new float[] {value, value}));
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}
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assertEquals(-1, Floats.indexOf(new float[] {5f, NaN, NaN, 5f}, new float[] {NaN, NaN}));
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}
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public void testLastIndexOf() {
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assertEquals(-1, Floats.lastIndexOf(EMPTY, (float) 1));
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assertEquals(-1, Floats.lastIndexOf(ARRAY1, (float) 2));
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assertEquals(-1, Floats.lastIndexOf(ARRAY234, (float) 1));
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assertEquals(0, Floats.lastIndexOf(new float[] {(float) -1}, (float) -1));
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assertEquals(0, Floats.lastIndexOf(ARRAY234, (float) 2));
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assertEquals(1, Floats.lastIndexOf(ARRAY234, (float) 3));
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assertEquals(2, Floats.lastIndexOf(ARRAY234, (float) 4));
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assertEquals(
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3, Floats.lastIndexOf(new float[] {(float) 2, (float) 3, (float) 2, (float) 3}, (float) 3));
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for (float value : NUMBERS) {
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assertEquals("" + value, 0, Floats.lastIndexOf(new float[] {value, 5f}, value));
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}
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assertEquals(-1, Floats.lastIndexOf(new float[] {NaN, 5f}, NaN));
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}
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@GwtIncompatible
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public void testMax_noArgs() {
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try {
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Floats.max();
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fail();
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} catch (IllegalArgumentException expected) {
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}
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}
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public void testMax() {
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assertEquals(GREATEST, Floats.max(GREATEST));
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assertEquals(LEAST, Floats.max(LEAST));
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assertEquals(
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(float) 9,
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Floats.max((float) 8, (float) 6, (float) 7, (float) 5, (float) 3, (float) 0, (float) 9));
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assertEquals(0f, Floats.max(-0f, 0f));
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assertEquals(0f, Floats.max(0f, -0f));
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assertEquals(GREATEST, Floats.max(NUMBERS));
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assertTrue(Float.isNaN(Floats.max(VALUES)));
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}
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@GwtIncompatible
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public void testMin_noArgs() {
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try {
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Floats.min();
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fail();
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} catch (IllegalArgumentException expected) {
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}
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}
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public void testMin() {
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assertEquals(LEAST, Floats.min(LEAST));
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assertEquals(GREATEST, Floats.min(GREATEST));
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assertEquals(
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(float) 0,
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Floats.min((float) 8, (float) 6, (float) 7, (float) 5, (float) 3, (float) 0, (float) 9));
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assertEquals(-0f, Floats.min(-0f, 0f));
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assertEquals(-0f, Floats.min(0f, -0f));
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assertEquals(LEAST, Floats.min(NUMBERS));
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assertTrue(Float.isNaN(Floats.min(VALUES)));
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}
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public void testConstrainToRange() {
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float tolerance = 1e-10f;
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assertEquals((float) 1, Floats.constrainToRange((float) 1, (float) 0, (float) 5), tolerance);
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assertEquals((float) 1, Floats.constrainToRange((float) 1, (float) 1, (float) 5), tolerance);
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assertEquals((float) 3, Floats.constrainToRange((float) 1, (float) 3, (float) 5), tolerance);
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assertEquals((float) -1, Floats.constrainToRange((float) 0, (float) -5, (float) -1), tolerance);
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assertEquals((float) 2, Floats.constrainToRange((float) 5, (float) 2, (float) 2), tolerance);
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try {
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Floats.constrainToRange((float) 1, (float) 3, (float) 2);
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fail();
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} catch (IllegalArgumentException expected) {
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}
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}
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public void testConcat() {
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assertTrue(Arrays.equals(EMPTY, Floats.concat()));
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assertTrue(Arrays.equals(EMPTY, Floats.concat(EMPTY)));
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assertTrue(Arrays.equals(EMPTY, Floats.concat(EMPTY, EMPTY, EMPTY)));
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assertTrue(Arrays.equals(ARRAY1, Floats.concat(ARRAY1)));
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assertNotSame(ARRAY1, Floats.concat(ARRAY1));
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assertTrue(Arrays.equals(ARRAY1, Floats.concat(EMPTY, ARRAY1, EMPTY)));
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assertTrue(
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Arrays.equals(
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new float[] {(float) 1, (float) 1, (float) 1}, Floats.concat(ARRAY1, ARRAY1, ARRAY1)));
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assertTrue(
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Arrays.equals(
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new float[] {(float) 1, (float) 2, (float) 3, (float) 4},
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Floats.concat(ARRAY1, ARRAY234)));
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}
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public void testEnsureCapacity() {
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assertSame(EMPTY, Floats.ensureCapacity(EMPTY, 0, 1));
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assertSame(ARRAY1, Floats.ensureCapacity(ARRAY1, 0, 1));
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assertSame(ARRAY1, Floats.ensureCapacity(ARRAY1, 1, 1));
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assertTrue(
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Arrays.equals(
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new float[] {(float) 1, (float) 0, (float) 0}, Floats.ensureCapacity(ARRAY1, 2, 1)));
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}
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public void testEnsureCapacity_fail() {
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try {
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Floats.ensureCapacity(ARRAY1, -1, 1);
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fail();
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} catch (IllegalArgumentException expected) {
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}
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try {
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// notice that this should even fail when no growth was needed
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Floats.ensureCapacity(ARRAY1, 1, -1);
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fail();
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} catch (IllegalArgumentException expected) {
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}
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}
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@GwtIncompatible // Float.toString returns different value in GWT.
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public void testJoin() {
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assertEquals("", Floats.join(",", EMPTY));
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assertEquals("1.0", Floats.join(",", ARRAY1));
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assertEquals("1.0,2.0", Floats.join(",", (float) 1, (float) 2));
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assertEquals("1.02.03.0", Floats.join("", (float) 1, (float) 2, (float) 3));
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}
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public void testLexicographicalComparator() {
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List<float[]> ordered =
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Arrays.asList(
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new float[] {},
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new float[] {LEAST},
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new float[] {LEAST, LEAST},
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new float[] {LEAST, (float) 1},
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new float[] {(float) 1},
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new float[] {(float) 1, LEAST},
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new float[] {GREATEST, Float.MAX_VALUE},
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new float[] {GREATEST, GREATEST},
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new float[] {GREATEST, GREATEST, GREATEST});
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Comparator<float[]> comparator = Floats.lexicographicalComparator();
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Helpers.testComparator(comparator, ordered);
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}
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@GwtIncompatible // SerializableTester
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public void testLexicographicalComparatorSerializable() {
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Comparator<float[]> comparator = Floats.lexicographicalComparator();
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assertSame(comparator, SerializableTester.reserialize(comparator));
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}
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public void testReverse() {
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testReverse(new float[] {}, new float[] {});
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testReverse(new float[] {1}, new float[] {1});
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testReverse(new float[] {1, 2}, new float[] {2, 1});
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testReverse(new float[] {3, 1, 1}, new float[] {1, 1, 3});
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testReverse(new float[] {-1, 1, -2, 2}, new float[] {2, -2, 1, -1});
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}
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private static void testReverse(float[] input, float[] expectedOutput) {
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input = Arrays.copyOf(input, input.length);
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Floats.reverse(input);
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assertTrue(Arrays.equals(expectedOutput, input));
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}
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private static void testReverse(
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float[] input, int fromIndex, int toIndex, float[] expectedOutput) {
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input = Arrays.copyOf(input, input.length);
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Floats.reverse(input, fromIndex, toIndex);
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assertTrue(Arrays.equals(expectedOutput, input));
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}
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public void testReverseIndexed() {
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testReverse(new float[] {}, 0, 0, new float[] {});
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testReverse(new float[] {1}, 0, 1, new float[] {1});
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testReverse(new float[] {1, 2}, 0, 2, new float[] {2, 1});
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testReverse(new float[] {3, 1, 1}, 0, 2, new float[] {1, 3, 1});
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testReverse(new float[] {3, 1, 1}, 0, 1, new float[] {3, 1, 1});
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testReverse(new float[] {-1, 1, -2, 2}, 1, 3, new float[] {-1, -2, 1, 2});
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}
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public void testSortDescending() {
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testSortDescending(new float[] {}, new float[] {});
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testSortDescending(new float[] {1}, new float[] {1});
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testSortDescending(new float[] {1, 2}, new float[] {2, 1});
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testSortDescending(new float[] {1, 3, 1}, new float[] {3, 1, 1});
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testSortDescending(new float[] {-1, 1, -2, 2}, new float[] {2, 1, -1, -2});
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testSortDescending(
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new float[] {-1, 1, Float.NaN, -2, -0, 0, 2}, new float[] {Float.NaN, 2, 1, 0, -0, -1, -2});
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}
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private static void testSortDescending(float[] input, float[] expectedOutput) {
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input = Arrays.copyOf(input, input.length);
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Floats.sortDescending(input);
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// GWT's Arrays.equals doesn't appear to handle NaN correctly, so test each element individually
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for (int i = 0; i < input.length; i++) {
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assertEquals(0, Float.compare(expectedOutput[i], input[i]));
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}
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}
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private static void testSortDescending(
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float[] input, int fromIndex, int toIndex, float[] expectedOutput) {
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input = Arrays.copyOf(input, input.length);
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Floats.sortDescending(input, fromIndex, toIndex);
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// GWT's Arrays.equals doesn't appear to handle NaN correctly, so test each element individually
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for (int i = 0; i < input.length; i++) {
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assertEquals(0, Float.compare(expectedOutput[i], input[i]));
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}
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}
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public void testSortDescendingIndexed() {
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testSortDescending(new float[] {}, 0, 0, new float[] {});
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testSortDescending(new float[] {1}, 0, 1, new float[] {1});
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testSortDescending(new float[] {1, 2}, 0, 2, new float[] {2, 1});
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testSortDescending(new float[] {1, 3, 1}, 0, 2, new float[] {3, 1, 1});
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testSortDescending(new float[] {1, 3, 1}, 0, 1, new float[] {1, 3, 1});
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testSortDescending(new float[] {-1, -2, 1, 2}, 1, 3, new float[] {-1, 1, -2, 2});
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testSortDescending(
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new float[] {-1, 1, Float.NaN, -2, 2}, 1, 4, new float[] {-1, Float.NaN, 1, -2, 2});
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}
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@GwtIncompatible // SerializableTester
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public void testStringConverterSerialization() {
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SerializableTester.reserializeAndAssert(Floats.stringConverter());
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}
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public void testToArray() {
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// need explicit type parameter to avoid javac warning!?
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List<Float> none = Arrays.<Float>asList();
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assertTrue(Arrays.equals(EMPTY, Floats.toArray(none)));
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List<Float> one = Arrays.asList((float) 1);
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assertTrue(Arrays.equals(ARRAY1, Floats.toArray(one)));
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float[] array = {(float) 0, (float) 1, (float) 3};
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List<Float> three = Arrays.asList((float) 0, (float) 1, (float) 3);
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assertTrue(Arrays.equals(array, Floats.toArray(three)));
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assertTrue(Arrays.equals(array, Floats.toArray(Floats.asList(array))));
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}
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public void testToArray_threadSafe() {
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for (int delta : new int[] {+1, 0, -1}) {
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for (int i = 0; i < VALUES.length; i++) {
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List<Float> list = Floats.asList(VALUES).subList(0, i);
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Collection<Float> misleadingSize = Helpers.misleadingSizeCollection(delta);
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misleadingSize.addAll(list);
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float[] arr = Floats.toArray(misleadingSize);
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assertEquals(i, arr.length);
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for (int j = 0; j < i; j++) {
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assertEquals(VALUES[j], arr[j]);
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}
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}
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}
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}
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public void testToArray_withNull() {
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List<Float> list = Arrays.asList((float) 0, (float) 1, null);
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try {
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Floats.toArray(list);
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fail();
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} catch (NullPointerException expected) {
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}
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}
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public void testToArray_withConversion() {
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float[] array = {(float) 0, (float) 1, (float) 2};
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List<Byte> bytes = Arrays.asList((byte) 0, (byte) 1, (byte) 2);
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List<Short> shorts = Arrays.asList((short) 0, (short) 1, (short) 2);
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List<Integer> ints = Arrays.asList(0, 1, 2);
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List<Float> floats = Arrays.asList((float) 0, (float) 1, (float) 2);
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List<Long> longs = Arrays.asList((long) 0, (long) 1, (long) 2);
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List<Double> doubles = Arrays.asList((double) 0, (double) 1, (double) 2);
|
|
|
|
assertTrue(Arrays.equals(array, Floats.toArray(bytes)));
|
|
assertTrue(Arrays.equals(array, Floats.toArray(shorts)));
|
|
assertTrue(Arrays.equals(array, Floats.toArray(ints)));
|
|
assertTrue(Arrays.equals(array, Floats.toArray(floats)));
|
|
assertTrue(Arrays.equals(array, Floats.toArray(longs)));
|
|
assertTrue(Arrays.equals(array, Floats.toArray(doubles)));
|
|
}
|
|
|
|
public void testAsList_isAView() {
|
|
float[] array = {(float) 0, (float) 1};
|
|
List<Float> list = Floats.asList(array);
|
|
list.set(0, (float) 2);
|
|
assertTrue(Arrays.equals(new float[] {(float) 2, (float) 1}, array));
|
|
array[1] = (float) 3;
|
|
assertThat(list).containsExactly((float) 2, (float) 3).inOrder();
|
|
}
|
|
|
|
public void testAsList_toArray_roundTrip() {
|
|
float[] array = {(float) 0, (float) 1, (float) 2};
|
|
List<Float> list = Floats.asList(array);
|
|
float[] newArray = Floats.toArray(list);
|
|
|
|
// Make sure it returned a copy
|
|
list.set(0, (float) 4);
|
|
assertTrue(Arrays.equals(new float[] {(float) 0, (float) 1, (float) 2}, newArray));
|
|
newArray[1] = (float) 5;
|
|
assertEquals((float) 1, (float) list.get(1));
|
|
}
|
|
|
|
// This test stems from a real bug found by andrewk
|
|
public void testAsList_subList_toArray_roundTrip() {
|
|
float[] array = {(float) 0, (float) 1, (float) 2, (float) 3};
|
|
List<Float> list = Floats.asList(array);
|
|
assertTrue(
|
|
Arrays.equals(new float[] {(float) 1, (float) 2}, Floats.toArray(list.subList(1, 3))));
|
|
assertTrue(Arrays.equals(new float[] {}, Floats.toArray(list.subList(2, 2))));
|
|
}
|
|
|
|
public void testAsListEmpty() {
|
|
assertSame(Collections.emptyList(), Floats.asList(EMPTY));
|
|
}
|
|
|
|
/**
|
|
* A reference implementation for {@code tryParse} that just catches the exception from {@link
|
|
* Float#valueOf}.
|
|
*/
|
|
private static Float referenceTryParse(String input) {
|
|
if (input.trim().length() < input.length()) {
|
|
return null;
|
|
}
|
|
try {
|
|
return Float.valueOf(input);
|
|
} catch (NumberFormatException e) {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
@GwtIncompatible // Floats.tryParse
|
|
private static void checkTryParse(String input) {
|
|
assertEquals(referenceTryParse(input), Floats.tryParse(input));
|
|
}
|
|
|
|
@GwtIncompatible // Floats.tryParse
|
|
private static void checkTryParse(float expected, String input) {
|
|
assertEquals(Float.valueOf(expected), Floats.tryParse(input));
|
|
}
|
|
|
|
@GwtIncompatible // Floats.tryParse
|
|
public void testTryParseHex() {
|
|
for (String signChar : ImmutableList.of("", "+", "-")) {
|
|
for (String hexPrefix : ImmutableList.of("0x", "0X")) {
|
|
for (String iPart : ImmutableList.of("", "0", "1", "F", "f", "c4", "CE")) {
|
|
for (String fPart : ImmutableList.of("", ".", ".F", ".52", ".a")) {
|
|
for (String expMarker : ImmutableList.of("p", "P")) {
|
|
for (String exponent : ImmutableList.of("0", "-5", "+20", "52")) {
|
|
for (String typePart : ImmutableList.of("", "D", "F", "d", "f")) {
|
|
checkTryParse(
|
|
signChar + hexPrefix + iPart + fPart + expMarker + exponent + typePart);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
@AndroidIncompatible // slow
|
|
@GwtIncompatible // Floats.tryParse
|
|
public void testTryParseAllCodePoints() {
|
|
// Exercise non-ASCII digit test cases and the like.
|
|
char[] tmp = new char[2];
|
|
for (int i = Character.MIN_CODE_POINT; i < Character.MAX_CODE_POINT; i++) {
|
|
Character.toChars(i, tmp, 0);
|
|
checkTryParse(String.copyValueOf(tmp, 0, Character.charCount(i)));
|
|
}
|
|
}
|
|
|
|
@GwtIncompatible // Floats.tryParse
|
|
public void testTryParseOfToStringIsOriginal() {
|
|
for (float f : NUMBERS) {
|
|
checkTryParse(f, Float.toString(f));
|
|
}
|
|
}
|
|
|
|
@GwtIncompatible // Floats.tryParse
|
|
public void testTryParseOfToHexStringIsOriginal() {
|
|
for (float f : NUMBERS) {
|
|
checkTryParse(f, Float.toHexString(f));
|
|
}
|
|
}
|
|
|
|
@GwtIncompatible // Floats.tryParse
|
|
public void testTryParseNaN() {
|
|
checkTryParse("NaN");
|
|
checkTryParse("+NaN");
|
|
checkTryParse("-NaN");
|
|
}
|
|
|
|
@GwtIncompatible // Floats.tryParse
|
|
public void testTryParseInfinity() {
|
|
checkTryParse(Float.POSITIVE_INFINITY, "Infinity");
|
|
checkTryParse(Float.POSITIVE_INFINITY, "+Infinity");
|
|
checkTryParse(Float.NEGATIVE_INFINITY, "-Infinity");
|
|
}
|
|
|
|
private static final String[] BAD_TRY_PARSE_INPUTS = {
|
|
"",
|
|
"+-",
|
|
"+-0",
|
|
" 5",
|
|
"32 ",
|
|
" 55 ",
|
|
"infinity",
|
|
"POSITIVE_INFINITY",
|
|
"0x9A",
|
|
"0x9A.bE-5",
|
|
".",
|
|
".e5",
|
|
"NaNd",
|
|
"InfinityF"
|
|
};
|
|
|
|
@GwtIncompatible // Floats.tryParse
|
|
public void testTryParseFailures() {
|
|
for (String badInput : BAD_TRY_PARSE_INPUTS) {
|
|
assertEquals(referenceTryParse(badInput), Floats.tryParse(badInput));
|
|
assertNull(Floats.tryParse(badInput));
|
|
}
|
|
}
|
|
|
|
@GwtIncompatible // NullPointerTester
|
|
public void testNulls() {
|
|
new NullPointerTester().testAllPublicStaticMethods(Floats.class);
|
|
}
|
|
|
|
@GwtIncompatible // Float.toString returns different value in GWT.
|
|
public void testStringConverter_convert() {
|
|
Converter<String, Float> converter = Floats.stringConverter();
|
|
assertEquals((Float) 1.0f, converter.convert("1.0"));
|
|
assertEquals((Float) 0.0f, converter.convert("0.0"));
|
|
assertEquals((Float) (-1.0f), converter.convert("-1.0"));
|
|
assertEquals((Float) 1.0f, converter.convert("1"));
|
|
assertEquals((Float) 0.0f, converter.convert("0"));
|
|
assertEquals((Float) (-1.0f), converter.convert("-1"));
|
|
assertEquals((Float) 1e6f, converter.convert("1e6"));
|
|
assertEquals((Float) 1e-6f, converter.convert("1e-6"));
|
|
}
|
|
|
|
public void testStringConverter_convertError() {
|
|
try {
|
|
Floats.stringConverter().convert("notanumber");
|
|
fail();
|
|
} catch (NumberFormatException expected) {
|
|
}
|
|
}
|
|
|
|
public void testStringConverter_nullConversions() {
|
|
assertNull(Floats.stringConverter().convert(null));
|
|
assertNull(Floats.stringConverter().reverse().convert(null));
|
|
}
|
|
|
|
@GwtIncompatible // Float.toString returns different value in GWT.
|
|
public void testStringConverter_reverse() {
|
|
Converter<String, Float> converter = Floats.stringConverter();
|
|
assertEquals("1.0", converter.reverse().convert(1.0f));
|
|
assertEquals("0.0", converter.reverse().convert(0.0f));
|
|
assertEquals("-1.0", converter.reverse().convert(-1.0f));
|
|
assertEquals("1000000.0", converter.reverse().convert(1e6f));
|
|
assertEquals("1.0E-6", converter.reverse().convert(1e-6f));
|
|
}
|
|
|
|
@GwtIncompatible // NullPointerTester
|
|
public void testStringConverter_nullPointerTester() throws Exception {
|
|
NullPointerTester tester = new NullPointerTester();
|
|
tester.testAllPublicInstanceMethods(Floats.stringConverter());
|
|
}
|
|
|
|
@GwtIncompatible
|
|
public void testTryParse_withNullNoGwt() {
|
|
assertNull(Floats.tryParse("null"));
|
|
try {
|
|
Floats.tryParse(null);
|
|
fail("Expected NPE");
|
|
} catch (NullPointerException expected) {
|
|
}
|
|
}
|
|
}
|