guava-gwt/test-super/com/google/common/primitives/super/com/google/common/primitives/FloatsTest.java - external/guava-libraries - Git at Google

 /*
  * Copyright (C) 2008 The Guava 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.common.primitives;

 import static com.google.common.truth.Truth.assertThat;
 import static java.lang.Float.NaN;

 import com.google.common.annotations.GwtCompatible;
 import com.google.common.collect.testing.Helpers;

 import junit.framework.TestCase;

 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;

 /**
  * Unit test for {@link Floats}.
  *
  * @author Kevin Bourrillion
  */
 @GwtCompatible(emulated = true)
 @SuppressWarnings("cast") // redundant casts are intentional and harmless
 public class FloatsTest extends TestCase {
   private static final float[] EMPTY = {};
   private static final float[] ARRAY1 = {(float) 1};
   private static final float[] ARRAY234
       = {(float) 2, (float) 3, (float) 4};

   private static final float LEAST = Float.NEGATIVE_INFINITY;
   private static final float GREATEST = Float.POSITIVE_INFINITY;

   private static final float[] NUMBERS = new float[] {
       LEAST, -Float.MAX_VALUE, -1f, -0f, 0f, 1f, Float.MAX_VALUE, GREATEST,
       Float.MIN_NORMAL, -Float.MIN_NORMAL,  Float.MIN_VALUE, -Float.MIN_VALUE,
       Integer.MIN_VALUE, Integer.MAX_VALUE, Long.MIN_VALUE, Long.MAX_VALUE
   };

   private static final float[] VALUES
       = Floats.concat(NUMBERS, new float[] {NaN});

   public void testHashCode() {
     for (float value : VALUES) {
       assertEquals(((Float) value).hashCode(), Floats.hashCode(value));
     }
   }

   public void testIsFinite() {
     for (float value : NUMBERS) {
       assertEquals(!(Float.isInfinite(value) || Float.isNaN(value)), Floats.isFinite(value));
     }
   }

   public void testCompare() {
     for (float x : VALUES) {
       for (float y : VALUES) {
         // note: spec requires only that the sign is the same
         assertEquals(x + ", " + y,
                      Float.valueOf(x).compareTo(y),
                      Floats.compare(x, y));
       }
     }
   }

   public void testContains() {
     assertFalse(Floats.contains(EMPTY, (float) 1));
     assertFalse(Floats.contains(ARRAY1, (float) 2));
     assertFalse(Floats.contains(ARRAY234, (float) 1));
     assertTrue(Floats.contains(new float[] {(float) -1}, (float) -1));
     assertTrue(Floats.contains(ARRAY234, (float) 2));
     assertTrue(Floats.contains(ARRAY234, (float) 3));
     assertTrue(Floats.contains(ARRAY234, (float) 4));

     for (float value : NUMBERS) {
       assertTrue("" + value, Floats.contains(new float[] {5f, value}, value));
     }
     assertFalse(Floats.contains(new float[] {5f, NaN}, NaN));
   }

   public void testIndexOf() {
     assertEquals(-1, Floats.indexOf(EMPTY, (float) 1));
     assertEquals(-1, Floats.indexOf(ARRAY1, (float) 2));
     assertEquals(-1, Floats.indexOf(ARRAY234, (float) 1));
     assertEquals(0, Floats.indexOf(
         new float[] {(float) -1}, (float) -1));
     assertEquals(0, Floats.indexOf(ARRAY234, (float) 2));
     assertEquals(1, Floats.indexOf(ARRAY234, (float) 3));
     assertEquals(2, Floats.indexOf(ARRAY234, (float) 4));
     assertEquals(1, Floats.indexOf(
         new float[] { (float) 2, (float) 3, (float) 2, (float) 3 },
         (float) 3));

     for (float value : NUMBERS) {
       assertEquals("" + value, 1,
           Floats.indexOf(new float[] {5f, value}, value));
     }
     assertEquals(-1, Floats.indexOf(new float[] {5f, NaN}, NaN));
   }

   public void testIndexOf_arrayTarget() {
     assertEquals(0, Floats.indexOf(EMPTY, EMPTY));
     assertEquals(0, Floats.indexOf(ARRAY234, EMPTY));
     assertEquals(-1, Floats.indexOf(EMPTY, ARRAY234));
     assertEquals(-1, Floats.indexOf(ARRAY234, ARRAY1));
     assertEquals(-1, Floats.indexOf(ARRAY1, ARRAY234));
     assertEquals(0, Floats.indexOf(ARRAY1, ARRAY1));
     assertEquals(0, Floats.indexOf(ARRAY234, ARRAY234));
     assertEquals(0, Floats.indexOf(
         ARRAY234, new float[] { (float) 2, (float) 3 }));
     assertEquals(1, Floats.indexOf(
         ARRAY234, new float[] { (float) 3, (float) 4 }));
     assertEquals(1, Floats.indexOf(ARRAY234, new float[] { (float) 3 }));
     assertEquals(2, Floats.indexOf(ARRAY234, new float[] { (float) 4 }));
     assertEquals(1, Floats.indexOf(new float[] { (float) 2, (float) 3,
         (float) 3, (float) 3, (float) 3 },
         new float[] { (float) 3 }
     ));
     assertEquals(2, Floats.indexOf(
         new float[] { (float) 2, (float) 3, (float) 2,
             (float) 3, (float) 4, (float) 2, (float) 3},
         new float[] { (float) 2, (float) 3, (float) 4}
     ));
     assertEquals(1, Floats.indexOf(
         new float[] { (float) 2, (float) 2, (float) 3,
             (float) 4, (float) 2, (float) 3, (float) 4},
         new float[] { (float) 2, (float) 3, (float) 4}
     ));
     assertEquals(-1, Floats.indexOf(
         new float[] { (float) 4, (float) 3, (float) 2},
         new float[] { (float) 2, (float) 3, (float) 4}
     ));

     for (float value : NUMBERS) {
       assertEquals("" + value, 1, Floats.indexOf(
           new float[] {5f, value, value, 5f}, new float[] {value, value}));
     }
     assertEquals(-1, Floats.indexOf(
         new float[] {5f, NaN, NaN, 5f}, new float[] {NaN, NaN}));
   }

   public void testLastIndexOf() {
     assertEquals(-1, Floats.lastIndexOf(EMPTY, (float) 1));
     assertEquals(-1, Floats.lastIndexOf(ARRAY1, (float) 2));
     assertEquals(-1, Floats.lastIndexOf(ARRAY234, (float) 1));
     assertEquals(0, Floats.lastIndexOf(
         new float[] {(float) -1}, (float) -1));
     assertEquals(0, Floats.lastIndexOf(ARRAY234, (float) 2));
     assertEquals(1, Floats.lastIndexOf(ARRAY234, (float) 3));
     assertEquals(2, Floats.lastIndexOf(ARRAY234, (float) 4));
     assertEquals(3, Floats.lastIndexOf(
         new float[] { (float) 2, (float) 3, (float) 2, (float) 3 },
         (float) 3));

     for (float value : NUMBERS) {
       assertEquals("" + value,
           0, Floats.lastIndexOf(new float[] {value, 5f}, value));
     }
     assertEquals(-1, Floats.lastIndexOf(new float[] {NaN, 5f}, NaN));
   }

   public void testMax_noArgs() {
     try {
       Floats.max();
       fail();
     } catch (IllegalArgumentException expected) {
     }
   }

   public void testMax() {
     assertEquals(GREATEST, Floats.max(GREATEST));
     assertEquals(LEAST, Floats.max(LEAST));
     assertEquals((float) 9, Floats.max(
         (float) 8, (float) 6, (float) 7,
         (float) 5, (float) 3, (float) 0, (float) 9));

     assertEquals(0f, Floats.max(-0f, 0f));
     assertEquals(0f, Floats.max(0f, -0f));
     assertEquals(GREATEST, Floats.max(NUMBERS));
     assertTrue(Float.isNaN(Floats.max(VALUES)));
   }

   public void testMin_noArgs() {
     try {
       Floats.min();
       fail();
     } catch (IllegalArgumentException expected) {
     }
   }

   public void testMin() {
     assertEquals(LEAST, Floats.min(LEAST));
     assertEquals(GREATEST, Floats.min(GREATEST));
     assertEquals((float) 0, Floats.min(
         (float) 8, (float) 6, (float) 7,
         (float) 5, (float) 3, (float) 0, (float) 9));

     assertEquals(-0f, Floats.min(-0f, 0f));
     assertEquals(-0f, Floats.min(0f, -0f));
     assertEquals(LEAST, Floats.min(NUMBERS));
     assertTrue(Float.isNaN(Floats.min(VALUES)));
   }

   public void testConcat() {
     assertTrue(Arrays.equals(EMPTY, Floats.concat()));
     assertTrue(Arrays.equals(EMPTY, Floats.concat(EMPTY)));
     assertTrue(Arrays.equals(EMPTY, Floats.concat(EMPTY, EMPTY, EMPTY)));
     assertTrue(Arrays.equals(ARRAY1, Floats.concat(ARRAY1)));
     assertNotSame(ARRAY1, Floats.concat(ARRAY1));
     assertTrue(Arrays.equals(ARRAY1, Floats.concat(EMPTY, ARRAY1, EMPTY)));
     assertTrue(Arrays.equals(
         new float[] {(float) 1, (float) 1, (float) 1},
         Floats.concat(ARRAY1, ARRAY1, ARRAY1)));
     assertTrue(Arrays.equals(
         new float[] {(float) 1, (float) 2, (float) 3, (float) 4},
         Floats.concat(ARRAY1, ARRAY234)));
   }

   public void testEnsureCapacity() {
     assertSame(EMPTY, Floats.ensureCapacity(EMPTY, 0, 1));
     assertSame(ARRAY1, Floats.ensureCapacity(ARRAY1, 0, 1));
     assertSame(ARRAY1, Floats.ensureCapacity(ARRAY1, 1, 1));
     assertTrue(Arrays.equals(
         new float[] {(float) 1, (float) 0, (float) 0},
         Floats.ensureCapacity(ARRAY1, 2, 1)));
   }

   public void testEnsureCapacity_fail() {
     try {
       Floats.ensureCapacity(ARRAY1, -1, 1);
       fail();
     } catch (IllegalArgumentException expected) {
     }
     try {
       // notice that this should even fail when no growth was needed
       Floats.ensureCapacity(ARRAY1, 1, -1);
       fail();
     } catch (IllegalArgumentException expected) {
     }
   }

   public void testLexicographicalComparator() {
     List<float[]> ordered = Arrays.asList(
         new float[] {},
         new float[] {LEAST},
         new float[] {LEAST, LEAST},
         new float[] {LEAST, (float) 1},
         new float[] {(float) 1},
         new float[] {(float) 1, LEAST},
         new float[] {GREATEST, Float.MAX_VALUE},
         new float[] {GREATEST, GREATEST},
         new float[] {GREATEST, GREATEST, GREATEST});

     Comparator<float[]> comparator = Floats.lexicographicalComparator();
     Helpers.testComparator(comparator, ordered);
   }

   public void testToArray() {
     // need explicit type parameter to avoid javac warning!?
     List<Float> none = Arrays.<Float>asList();
     assertTrue(Arrays.equals(EMPTY, Floats.toArray(none)));

     List<Float> one = Arrays.asList((float) 1);
     assertTrue(Arrays.equals(ARRAY1, Floats.toArray(one)));

     float[] array = {(float) 0, (float) 1, (float) 3};

     List<Float> three = Arrays.asList((float) 0, (float) 1, (float) 3);
     assertTrue(Arrays.equals(array, Floats.toArray(three)));

     assertTrue(Arrays.equals(array, Floats.toArray(Floats.asList(array))));
   }

   public void testToArray_threadSafe() {
     for (int delta : new int[] { +1, 0, -1 }) {
       for (int i = 0; i < VALUES.length; i++) {
         List<Float> list = Floats.asList(VALUES).subList(0, i);
         Collection<Float> misleadingSize =
             Helpers.misleadingSizeCollection(delta);
         misleadingSize.addAll(list);
         float[] arr = Floats.toArray(misleadingSize);
         assertEquals(i, arr.length);
         for (int j = 0; j < i; j++) {
           assertEquals(VALUES[j], arr[j]);
         }
       }
     }
   }

   public void testToArray_withNull() {
     List<Float> list = Arrays.asList((float) 0, (float) 1, null);
     try {
       Floats.toArray(list);
       fail();
     } catch (NullPointerException expected) {
     }
   }

   public void testToArray_withConversion() {
     float[] array = {(float) 0, (float) 1, (float) 2};

     List<Byte> bytes = Arrays.asList((byte) 0, (byte) 1, (byte) 2);
     List<Short> shorts = Arrays.asList((short) 0, (short) 1, (short) 2);
     List<Integer> ints = Arrays.asList(0, 1, 2);
     List<Float> floats = Arrays.asList((float) 0, (float) 1, (float) 2);
     List<Long> longs = Arrays.asList((long) 0, (long) 1, (long) 2);
     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;
     }
  }

   private static final String[] BAD_TRY_PARSE_INPUTS =
     { "", "+-", "+-0", " 5", "32 ", " 55 ", "infinity", "POSITIVE_INFINITY", "0x9A", "0x9A.bE-5",
       ".", ".e5", "NaNd", "InfinityF" };

   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));
   }
 }
	/*
	* Copyright (C) 2008 The Guava 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.common.primitives;

	import static com.google.common.truth.Truth.assertThat;
	import static java.lang.Float.NaN;

	import com.google.common.annotations.GwtCompatible;
	import com.google.common.collect.testing.Helpers;

	import junit.framework.TestCase;

	import java.util.Arrays;
	import java.util.Collection;
	import java.util.Collections;
	import java.util.Comparator;
	import java.util.List;

	/**
	* Unit test for {@link Floats}.
	*
	* @author Kevin Bourrillion
	*/
	@GwtCompatible(emulated = true)
	@SuppressWarnings("cast") // redundant casts are intentional and harmless
	public class FloatsTest extends TestCase {
	private static final float[] EMPTY = {};
	private static final float[] ARRAY1 = {(float) 1};
	private static final float[] ARRAY234
	= {(float) 2, (float) 3, (float) 4};

	private static final float LEAST = Float.NEGATIVE_INFINITY;
	private static final float GREATEST = Float.POSITIVE_INFINITY;

	private static final float[] NUMBERS = new float[] {
	LEAST, -Float.MAX_VALUE, -1f, -0f, 0f, 1f, Float.MAX_VALUE, GREATEST,
	Float.MIN_NORMAL, -Float.MIN_NORMAL, Float.MIN_VALUE, -Float.MIN_VALUE,
	Integer.MIN_VALUE, Integer.MAX_VALUE, Long.MIN_VALUE, Long.MAX_VALUE
	};

	private static final float[] VALUES
	= Floats.concat(NUMBERS, new float[] {NaN});

	public void testHashCode() {
	for (float value : VALUES) {
	assertEquals(((Float) value).hashCode(), Floats.hashCode(value));
	}
	}

	public void testIsFinite() {
	for (float value : NUMBERS) {
	assertEquals(!(Float.isInfinite(value) \|\| Float.isNaN(value)), Floats.isFinite(value));
	}
	}

	public void testCompare() {
	for (float x : VALUES) {
	for (float y : VALUES) {
	// note: spec requires only that the sign is the same
	assertEquals(x + ", " + y,
	Float.valueOf(x).compareTo(y),
	Floats.compare(x, y));
	}
	}
	}

	public void testContains() {
	assertFalse(Floats.contains(EMPTY, (float) 1));
	assertFalse(Floats.contains(ARRAY1, (float) 2));
	assertFalse(Floats.contains(ARRAY234, (float) 1));
	assertTrue(Floats.contains(new float[] {(float) -1}, (float) -1));
	assertTrue(Floats.contains(ARRAY234, (float) 2));
	assertTrue(Floats.contains(ARRAY234, (float) 3));
	assertTrue(Floats.contains(ARRAY234, (float) 4));

	for (float value : NUMBERS) {
	assertTrue("" + value, Floats.contains(new float[] {5f, value}, value));
	}
	assertFalse(Floats.contains(new float[] {5f, NaN}, NaN));
	}

	public void testIndexOf() {
	assertEquals(-1, Floats.indexOf(EMPTY, (float) 1));
	assertEquals(-1, Floats.indexOf(ARRAY1, (float) 2));
	assertEquals(-1, Floats.indexOf(ARRAY234, (float) 1));
	assertEquals(0, Floats.indexOf(
	new float[] {(float) -1}, (float) -1));
	assertEquals(0, Floats.indexOf(ARRAY234, (float) 2));
	assertEquals(1, Floats.indexOf(ARRAY234, (float) 3));
	assertEquals(2, Floats.indexOf(ARRAY234, (float) 4));
	assertEquals(1, Floats.indexOf(
	new float[] { (float) 2, (float) 3, (float) 2, (float) 3 },
	(float) 3));

	for (float value : NUMBERS) {
	assertEquals("" + value, 1,
	Floats.indexOf(new float[] {5f, value}, value));
	}
	assertEquals(-1, Floats.indexOf(new float[] {5f, NaN}, NaN));
	}

	public void testIndexOf_arrayTarget() {
	assertEquals(0, Floats.indexOf(EMPTY, EMPTY));
	assertEquals(0, Floats.indexOf(ARRAY234, EMPTY));
	assertEquals(-1, Floats.indexOf(EMPTY, ARRAY234));
	assertEquals(-1, Floats.indexOf(ARRAY234, ARRAY1));
	assertEquals(-1, Floats.indexOf(ARRAY1, ARRAY234));
	assertEquals(0, Floats.indexOf(ARRAY1, ARRAY1));
	assertEquals(0, Floats.indexOf(ARRAY234, ARRAY234));
	assertEquals(0, Floats.indexOf(
	ARRAY234, new float[] { (float) 2, (float) 3 }));
	assertEquals(1, Floats.indexOf(
	ARRAY234, new float[] { (float) 3, (float) 4 }));
	assertEquals(1, Floats.indexOf(ARRAY234, new float[] { (float) 3 }));
	assertEquals(2, Floats.indexOf(ARRAY234, new float[] { (float) 4 }));
	assertEquals(1, Floats.indexOf(new float[] { (float) 2, (float) 3,
	(float) 3, (float) 3, (float) 3 },
	new float[] { (float) 3 }
	));
	assertEquals(2, Floats.indexOf(
	new float[] { (float) 2, (float) 3, (float) 2,
	(float) 3, (float) 4, (float) 2, (float) 3},
	new float[] { (float) 2, (float) 3, (float) 4}
	));
	assertEquals(1, Floats.indexOf(
	new float[] { (float) 2, (float) 2, (float) 3,
	(float) 4, (float) 2, (float) 3, (float) 4},
	new float[] { (float) 2, (float) 3, (float) 4}
	));
	assertEquals(-1, Floats.indexOf(
	new float[] { (float) 4, (float) 3, (float) 2},
	new float[] { (float) 2, (float) 3, (float) 4}
	));

	for (float value : NUMBERS) {
	assertEquals("" + value, 1, Floats.indexOf(
	new float[] {5f, value, value, 5f}, new float[] {value, value}));
	}
	assertEquals(-1, Floats.indexOf(
	new float[] {5f, NaN, NaN, 5f}, new float[] {NaN, NaN}));
	}

	public void testLastIndexOf() {
	assertEquals(-1, Floats.lastIndexOf(EMPTY, (float) 1));
	assertEquals(-1, Floats.lastIndexOf(ARRAY1, (float) 2));
	assertEquals(-1, Floats.lastIndexOf(ARRAY234, (float) 1));
	assertEquals(0, Floats.lastIndexOf(
	new float[] {(float) -1}, (float) -1));
	assertEquals(0, Floats.lastIndexOf(ARRAY234, (float) 2));
	assertEquals(1, Floats.lastIndexOf(ARRAY234, (float) 3));
	assertEquals(2, Floats.lastIndexOf(ARRAY234, (float) 4));
	assertEquals(3, Floats.lastIndexOf(
	new float[] { (float) 2, (float) 3, (float) 2, (float) 3 },
	(float) 3));

	for (float value : NUMBERS) {
	assertEquals("" + value,
	0, Floats.lastIndexOf(new float[] {value, 5f}, value));
	}
	assertEquals(-1, Floats.lastIndexOf(new float[] {NaN, 5f}, NaN));
	}

	public void testMax_noArgs() {
	try {
	Floats.max();
	fail();
	} catch (IllegalArgumentException expected) {
	}
	}

	public void testMax() {
	assertEquals(GREATEST, Floats.max(GREATEST));
	assertEquals(LEAST, Floats.max(LEAST));
	assertEquals((float) 9, Floats.max(
	(float) 8, (float) 6, (float) 7,
	(float) 5, (float) 3, (float) 0, (float) 9));

	assertEquals(0f, Floats.max(-0f, 0f));
	assertEquals(0f, Floats.max(0f, -0f));
	assertEquals(GREATEST, Floats.max(NUMBERS));
	assertTrue(Float.isNaN(Floats.max(VALUES)));
	}

	public void testMin_noArgs() {
	try {
	Floats.min();
	fail();
	} catch (IllegalArgumentException expected) {
	}
	}

	public void testMin() {
	assertEquals(LEAST, Floats.min(LEAST));
	assertEquals(GREATEST, Floats.min(GREATEST));
	assertEquals((float) 0, Floats.min(
	(float) 8, (float) 6, (float) 7,
	(float) 5, (float) 3, (float) 0, (float) 9));

	assertEquals(-0f, Floats.min(-0f, 0f));
	assertEquals(-0f, Floats.min(0f, -0f));
	assertEquals(LEAST, Floats.min(NUMBERS));
	assertTrue(Float.isNaN(Floats.min(VALUES)));
	}

	public void testConcat() {
	assertTrue(Arrays.equals(EMPTY, Floats.concat()));
	assertTrue(Arrays.equals(EMPTY, Floats.concat(EMPTY)));
	assertTrue(Arrays.equals(EMPTY, Floats.concat(EMPTY, EMPTY, EMPTY)));
	assertTrue(Arrays.equals(ARRAY1, Floats.concat(ARRAY1)));
	assertNotSame(ARRAY1, Floats.concat(ARRAY1));
	assertTrue(Arrays.equals(ARRAY1, Floats.concat(EMPTY, ARRAY1, EMPTY)));
	assertTrue(Arrays.equals(
	new float[] {(float) 1, (float) 1, (float) 1},
	Floats.concat(ARRAY1, ARRAY1, ARRAY1)));
	assertTrue(Arrays.equals(
	new float[] {(float) 1, (float) 2, (float) 3, (float) 4},
	Floats.concat(ARRAY1, ARRAY234)));
	}

	public void testEnsureCapacity() {
	assertSame(EMPTY, Floats.ensureCapacity(EMPTY, 0, 1));
	assertSame(ARRAY1, Floats.ensureCapacity(ARRAY1, 0, 1));
	assertSame(ARRAY1, Floats.ensureCapacity(ARRAY1, 1, 1));
	assertTrue(Arrays.equals(
	new float[] {(float) 1, (float) 0, (float) 0},
	Floats.ensureCapacity(ARRAY1, 2, 1)));
	}

	public void testEnsureCapacity_fail() {
	try {
	Floats.ensureCapacity(ARRAY1, -1, 1);
	fail();
	} catch (IllegalArgumentException expected) {
	}
	try {
	// notice that this should even fail when no growth was needed
	Floats.ensureCapacity(ARRAY1, 1, -1);
	fail();
	} catch (IllegalArgumentException expected) {
	}
	}

	public void testLexicographicalComparator() {
	List<float[]> ordered = Arrays.asList(
	new float[] {},
	new float[] {LEAST},
	new float[] {LEAST, LEAST},
	new float[] {LEAST, (float) 1},
	new float[] {(float) 1},
	new float[] {(float) 1, LEAST},
	new float[] {GREATEST, Float.MAX_VALUE},
	new float[] {GREATEST, GREATEST},
	new float[] {GREATEST, GREATEST, GREATEST});

	Comparator<float[]> comparator = Floats.lexicographicalComparator();
	Helpers.testComparator(comparator, ordered);
	}

	public void testToArray() {
	// need explicit type parameter to avoid javac warning!?
	List<Float> none = Arrays.<Float>asList();
	assertTrue(Arrays.equals(EMPTY, Floats.toArray(none)));

	List<Float> one = Arrays.asList((float) 1);
	assertTrue(Arrays.equals(ARRAY1, Floats.toArray(one)));

	float[] array = {(float) 0, (float) 1, (float) 3};

	List<Float> three = Arrays.asList((float) 0, (float) 1, (float) 3);
	assertTrue(Arrays.equals(array, Floats.toArray(three)));

	assertTrue(Arrays.equals(array, Floats.toArray(Floats.asList(array))));
	}

	public void testToArray_threadSafe() {
	for (int delta : new int[] { +1, 0, -1 }) {
	for (int i = 0; i < VALUES.length; i++) {
	List<Float> list = Floats.asList(VALUES).subList(0, i);
	Collection<Float> misleadingSize =
	Helpers.misleadingSizeCollection(delta);
	misleadingSize.addAll(list);
	float[] arr = Floats.toArray(misleadingSize);
	assertEquals(i, arr.length);
	for (int j = 0; j < i; j++) {
	assertEquals(VALUES[j], arr[j]);
	}
	}
	}
	}

	public void testToArray_withNull() {
	List<Float> list = Arrays.asList((float) 0, (float) 1, null);
	try {
	Floats.toArray(list);
	fail();
	} catch (NullPointerException expected) {
	}
	}

	public void testToArray_withConversion() {
	float[] array = {(float) 0, (float) 1, (float) 2};

	List<Byte> bytes = Arrays.asList((byte) 0, (byte) 1, (byte) 2);
	List<Short> shorts = Arrays.asList((short) 0, (short) 1, (short) 2);
	List<Integer> ints = Arrays.asList(0, 1, 2);
	List<Float> floats = Arrays.asList((float) 0, (float) 1, (float) 2);
	List<Long> longs = Arrays.asList((long) 0, (long) 1, (long) 2);
	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;
	}
	}

	private static final String[] BAD_TRY_PARSE_INPUTS =
	{ "", "+-", "+-0", " 5", "32 ", " 55 ", "infinity", "POSITIVE_INFINITY", "0x9A", "0x9A.bE-5",
	".", ".e5", "NaNd", "InfinityF" };

	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));
	}
	}