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      1 /*
      2  * Copyright 2018, OpenCensus Authors
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package io.opencensus.internal;
     18 
     19 import static org.junit.Assert.assertFalse;
     20 import static org.junit.Assert.assertTrue;
     21 
     22 import java.util.Date;
     23 import org.junit.Rule;
     24 import org.junit.Test;
     25 import org.junit.rules.ExpectedException;
     26 import org.junit.runner.RunWith;
     27 import org.junit.runners.JUnit4;
     28 
     29 /** Tests for {@link Utils}. */
     30 @RunWith(JUnit4.class)
     31 public final class UtilsTest {
     32   private static final String TEST_MESSAGE = "test message";
     33   private static final String TEST_MESSAGE_TEMPLATE = "I ate %s eggs.";
     34   private static final int TEST_MESSAGE_VALUE = 2;
     35   private static final String FORMATED_SIMPLE_TEST_MESSAGE = "I ate 2 eggs.";
     36   private static final String FORMATED_COMPLEX_TEST_MESSAGE = "I ate 2 eggs. [2]";
     37 
     38   @Rule public ExpectedException thrown = ExpectedException.none();
     39 
     40   @Test
     41   public void checkArgument() {
     42     Utils.checkArgument(true, TEST_MESSAGE);
     43     thrown.expect(IllegalArgumentException.class);
     44     thrown.expectMessage(TEST_MESSAGE);
     45     Utils.checkArgument(false, TEST_MESSAGE);
     46   }
     47 
     48   @Test
     49   public void checkArgument_NullErrorMessage() {
     50     thrown.expect(IllegalArgumentException.class);
     51     thrown.expectMessage("null");
     52     Utils.checkArgument(false, null);
     53   }
     54 
     55   @Test
     56   public void checkArgument_WithSimpleFormat() {
     57     thrown.expect(IllegalArgumentException.class);
     58     thrown.expectMessage(FORMATED_SIMPLE_TEST_MESSAGE);
     59     Utils.checkArgument(false, TEST_MESSAGE_TEMPLATE, TEST_MESSAGE_VALUE);
     60   }
     61 
     62   @Test
     63   public void checkArgument_WithComplexFormat() {
     64     thrown.expect(IllegalArgumentException.class);
     65     thrown.expectMessage(FORMATED_COMPLEX_TEST_MESSAGE);
     66     Utils.checkArgument(false, TEST_MESSAGE_TEMPLATE, TEST_MESSAGE_VALUE, TEST_MESSAGE_VALUE);
     67   }
     68 
     69   @Test
     70   public void checkState() {
     71     Utils.checkNotNull(true, TEST_MESSAGE);
     72     thrown.expect(IllegalStateException.class);
     73     thrown.expectMessage(TEST_MESSAGE);
     74     Utils.checkState(false, TEST_MESSAGE);
     75   }
     76 
     77   @Test
     78   public void checkState_NullErrorMessage() {
     79     thrown.expect(IllegalStateException.class);
     80     thrown.expectMessage("null");
     81     Utils.checkState(false, null);
     82   }
     83 
     84   @Test
     85   public void checkNotNull() {
     86     Utils.checkNotNull(new Object(), TEST_MESSAGE);
     87     thrown.expect(NullPointerException.class);
     88     thrown.expectMessage(TEST_MESSAGE);
     89     Utils.checkNotNull(null, TEST_MESSAGE);
     90   }
     91 
     92   @Test
     93   public void checkNotNull_NullErrorMessage() {
     94     thrown.expect(NullPointerException.class);
     95     thrown.expectMessage("null");
     96     Utils.checkNotNull(null, null);
     97   }
     98 
     99   @Test
    100   public void checkIndex_Valid() {
    101     Utils.checkIndex(1, 2);
    102   }
    103 
    104   @Test
    105   public void checkIndex_NegativeSize() {
    106     thrown.expect(IllegalArgumentException.class);
    107     thrown.expectMessage("Negative size: -1");
    108     Utils.checkIndex(0, -1);
    109   }
    110 
    111   @Test
    112   public void checkIndex_NegativeIndex() {
    113     thrown.expect(IndexOutOfBoundsException.class);
    114     thrown.expectMessage("Index out of bounds: size=10, index=-2");
    115     Utils.checkIndex(-2, 10);
    116   }
    117 
    118   @Test
    119   public void checkIndex_IndexEqualToSize() {
    120     thrown.expect(IndexOutOfBoundsException.class);
    121     thrown.expectMessage("Index out of bounds: size=5, index=5");
    122     Utils.checkIndex(5, 5);
    123   }
    124 
    125   @Test
    126   public void checkIndex_IndexGreaterThanSize() {
    127     thrown.expect(IndexOutOfBoundsException.class);
    128     thrown.expectMessage("Index out of bounds: size=10, index=11");
    129     Utils.checkIndex(11, 10);
    130   }
    131 
    132   @Test
    133   public void equalsObjects_Equal() {
    134     assertTrue(Utils.equalsObjects(null, null));
    135     assertTrue(Utils.equalsObjects(new Date(1L), new Date(1L)));
    136   }
    137 
    138   @Test
    139   public void equalsObjects_Unequal() {
    140     assertFalse(Utils.equalsObjects(null, new Object()));
    141     assertFalse(Utils.equalsObjects(new Object(), null));
    142     assertFalse(Utils.equalsObjects(new Object(), new Object()));
    143   }
    144 }
    145