tests for ObjectsUtils

jsjem · jsjem · commit 40e1ef4005bf · 2018-04-16T19:56:56.000+03:00
diff --git a/rollbar-java/src/test/java/com/rollbar/notifier/util/ObjectsUtilsTest.java b/rollbar-java/src/test/java/com/rollbar/notifier/util/ObjectsUtilsTest.java
@@ -0,0 +1,61 @@
+package com.rollbar.notifier.util;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+
+import java.util.Arrays;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.core.Is.is;
+
+public class ObjectsUtilsTest {
+  private static final Object[] EQUALS_VALUES = {"123", 123, null};
+  private static final String[] HASH_VALUES = {"one", "two", "three"};
+  private static String TEST = "Test";
+  private static String ERROR_DESCRIPTION = "Error description";
+	
+  @Rule
+  public ExpectedException expectedException;
+	
+  @Before
+  public void setUp() {
+    expectedException = ExpectedException.none();
+  }
+	
+  @Test
+  public void testEquals() {
+    for(int i = 0; i < EQUALS_VALUES.length; i++)
+	  for(int j = 0; j < EQUALS_VALUES.length; j++) { Object first = EQUALS_VALUES[i];
+	    Object second = EQUALS_VALUES[j];
+		  boolean expected = (i == j);
+		  boolean result = ObjectsUtils.equals(first, second);
+		  assertThat(String.format("Expected %b when equating %s to %s, got %b instead.", expected, first, second, result), result, is(expected));
+    }
+  }
+		
+  @Test
+  public void testHash() {
+    int result = ObjectsUtils.hash((Object[])null);
+	int expected = 0;
+	assertThat(result, is(expected));
+	result = ObjectsUtils.hash("one", "two", "three");
+	expected = Arrays.hashCode(HASH_VALUES);
+	assertThat(result, is(expected));
+  }
+	
+  @Test
+  public void  testNonNull() {
+    String result = ObjectsUtils.requireNonNull(TEST, ERROR_DESCRIPTION);
+	String expected = TEST;
+	assertThat(result, is(expected));
+  }
+	
+  @Test
+  public void  testNull() {
+    expectedException.expect(NullPointerException.class);
+	expectedException.expectMessage(ERROR_DESCRIPTION);
+	ObjectsUtils.requireNonNull(null, ERROR_DESCRIPTION);
+  }
+}
