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BAEL-637 Pre conditions (#1076) 

* BAL-36 File size api in java and apache commons IO

* BAEL-282 grep in java - fixes after code review

* BAEL-519 Added support for disruptor library

* BAEL-519 Added support for disruptor library

* BAEL-519 Added support for disruptor library

* BAEL-519 Added support for disruptor library

* BAEL-519 Added support for disruptor library

* BAEL-519 Added support for disruptor library

* BAEL-519 Added support for disruptor

* BAEL-519 Moved all supporting classes to main source

* BAEL-519 Moved all supporting classes to main source

* BAEL-519 Moved asserts and test classes in test folder.

* BAEL-519 moved test related producer and consumer to src.

* BAEL-586 Guide to Guava BiMap.

* BAEL-587 formatted code.

* BAEL-519 LMAX Disruptor

* BAEL-587 resolved merge

* BAEL-587 Resolved merge

* BAEL-519 Removed disruptor link.

* BAEL-519 Reverted Guava changes

* RFQ-587 Added disruptor as a separate module.

* BAEL-519 Disruptor changes.

* BAEL-519 Removed disruptor from core-java module.

* BAEL-637 Guide to PreConditions

* BAEL-637 Used assertJ for exception assertion.

* BAEL-637 updated tests to use assertJ.
This commit is contained in:
Muhammed Almas 2017-01-31 01:02:27 +05:30 committed by Zeger Hendrikse
parent f970b1dbcf
commit e3c1e6986b
1 changed files with 30 additions and 97 deletions
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127
guava/src/test/java/org/baeldung/guava/GuavaPreConditionsTest.java
View File

@ -1,6 +1,6 @@
package org.baeldung.guava;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import java.util.Arrays;
import org.junit.Test;
import static com.google.common.base.Preconditions.*;
@ -10,149 +10,92 @@ public class GuavaPreConditionsTest {
@Test
public void whenCheckArgumentEvaluatesFalse_throwsException() {
int age = -18;
try {
checkArgument(age > 0);
} catch (Exception exception) {
assertThat(exception).isInstanceOf(IllegalArgumentException.class);
assertThat(exception).hasNoCause();
assertThat(exception).hasMessage(null);
}
assertThatThrownBy(() -> checkArgument(age > 0)).isInstanceOf(IllegalArgumentException.class).hasMessage(null).hasNoCause();
}
@Test
public void givenErrorMessage_whenCheckArgumentEvaluatesFalse_throwsException() {
final int age = -18;
final String message = "Age can't be zero or less than zero";
try {
checkArgument(age > 0, message);
} catch (Exception exception) {
assertThat(exception).isInstanceOf(IllegalArgumentException.class);
assertThat(exception).hasNoCause();
assertThat(exception).hasMessage(message);
}
assertThatThrownBy(() -> checkArgument(age > 0, message)).isInstanceOf(IllegalArgumentException.class).hasMessage(message).hasNoCause();
}
@Test
public void givenTemplatedErrorMessage_whenCheckArgumentEvaluatesFalse_throwsException() {
final int age = -18;
final String message = "Age can't be zero or less than zero, you supplied %s.";
try {
checkArgument(age > 0, message, age);
} catch (Exception exception) {
assertThat(exception).isInstanceOf(IllegalArgumentException.class);
assertThat(exception).hasNoCause();
assertThat(exception).hasMessage(message, age);
}
assertThatThrownBy(() -> checkArgument(age > 0, message, age)).isInstanceOf(IllegalArgumentException.class).hasMessage(message, age).hasNoCause();
}
@Test
public void givenArrayOfIntegers_whenCheckElementIndexEvaluatesFalse_throwsException() {
final int[] numbers = { 1, 2, 3, 4, 5 };
try {
checkElementIndex(6, numbers.length - 1);
} catch (Exception exception) {
assertThat(exception).isInstanceOf(IndexOutOfBoundsException.class);
assertThat(exception).hasNoCause();
}
assertThatThrownBy(() -> checkElementIndex(6, numbers.length - 1)).isInstanceOf(IndexOutOfBoundsException.class).hasNoCause();
}
@Test
public void givenArrayOfIntegersAndMessage_whenCheckElementIndexEvaluatesFalse_throwsException() {
final int[] numbers = { 1, 2, 3, 4, 5 };
final String message = "Please check the bound of an array and retry";
try {
checkElementIndex(6, numbers.length - 1, message);
} catch (Exception exception) {
assertThat(exception).isInstanceOf(IndexOutOfBoundsException.class);
assertThat(exception).hasNoCause();
assertThat(exception.getMessage()).startsWith(message);
}
assertThatThrownBy(() -> checkElementIndex(6, numbers.length - 1, message)).isInstanceOf(IndexOutOfBoundsException.class).hasMessageStartingWith(message).hasNoCause();
}
@Test
public void givenNullString_whenCheckNotNullCalled_throwsException() {
final String nullObject = null;
try {
checkNotNull(nullObject);
} catch (Exception exception) {
assertThat(exception).isInstanceOf(NullPointerException.class);
assertThat(exception).hasNoCause();
assertThat(exception).hasMessage(null);
}
assertThatThrownBy(() -> checkNotNull(nullObject)).isInstanceOf(NullPointerException.class).hasMessage(null).hasNoCause();
}
@Test
public void givenNullString_whenCheckNotNullCalledWithMessage_throwsException() {
final String nullObject = null;
final String message = "Please check the Object supplied, its null!";
try {
checkNotNull(nullObject, message);
} catch (Exception exception) {
assertThat(exception).isInstanceOf(NullPointerException.class);
assertThat(exception).hasNoCause();
assertThat(exception).hasMessage(message);
}
assertThatThrownBy(() -> checkNotNull(nullObject, message)).isInstanceOf(NullPointerException.class).hasMessage(message).hasNoCause();
}
@Test
public void givenNullString_whenCheckNotNullCalledWithTemplatedMessage_throwsException() {
final String nullObject = null;
final String message = "Please check the Object supplied, its %s!";
try {
checkNotNull(nullObject, message, nullObject);
} catch (Exception exception) {
assertThat(exception).isInstanceOf(NullPointerException.class);
assertThat(exception).hasNoCause();
assertThat(exception).hasMessage(message, nullObject);
}
assertThatThrownBy(() -> checkNotNull(nullObject, message, nullObject)).isInstanceOf(NullPointerException.class).hasMessage(message, nullObject).hasNoCause();
}
@Test
public void givenArrayOfIntegers_whenCheckPositionIndexEvaluatesFalse_throwsException() {
final int[] numbers = { 1, 2, 3, 4, 5 };
try {
checkPositionIndex(6, numbers.length - 1);
} catch (Exception exception) {
assertThat(exception).isInstanceOf(IndexOutOfBoundsException.class);
assertThat(exception).hasNoCause();
}
assertThatThrownBy(() -> checkPositionIndex(6, numbers.length - 1)).isInstanceOf(IndexOutOfBoundsException.class).hasNoCause();
}
@Test
public void givenArrayOfIntegersAndMessage_whenCheckPositionIndexEvaluatesFalse_throwsException() {
final int[] numbers = { 1, 2, 3, 4, 5 };
final String message = "Please check the bound of an array and retry";
try {
checkPositionIndex(6, numbers.length - 1, message);
} catch (Exception exception) {
assertThat(exception).isInstanceOf(IndexOutOfBoundsException.class);
assertThat(exception).hasNoCause();
assertThat(exception.getMessage()).startsWith(message);
}
assertThatThrownBy(() -> checkPositionIndex(6, numbers.length - 1, message)).isInstanceOf(IndexOutOfBoundsException.class).hasMessageStartingWith(message).hasNoCause();
}
@Test
public void givenArrayOfIntegers_whenCheckPositionIndexesEvaluatesFalse_throwsException() {
final int[] numbers = { 1, 2, 3, 4, 5 };
try {
checkPositionIndexes(6, 0, numbers.length - 1);
} catch (Exception exception) {
assertThat(exception).isInstanceOf(IndexOutOfBoundsException.class);
assertThat(exception).hasNoCause();
}
assertThatThrownBy(() -> checkPositionIndexes(6, 0, numbers.length - 1)).isInstanceOf(IndexOutOfBoundsException.class).hasNoCause();
}
@Test
public void givenValidStates_whenCheckStateEvaluatesFalse_throwsException() {
final int[] validStates = { -1, 0, 1 };
final int givenState = 10;
try {
checkState(Arrays.binarySearch(validStates, givenState) > 0);
} catch (Exception exception) {
assertThat(exception).isInstanceOf(IllegalStateException.class);
assertThat(exception).hasNoCause();
assertThat(exception).hasMessage(null);
}
assertThatThrownBy(() -> checkState(Arrays.binarySearch(validStates, givenState) > 0)).isInstanceOf(IllegalStateException.class).hasMessage(null).hasNoCause();
}
@Test
@ -160,13 +103,8 @@ public class GuavaPreConditionsTest {
final int[] validStates = { -1, 0, 1 };
final int givenState = 10;
final String message = "You have entered an invalid state";
try {
checkState(Arrays.binarySearch(validStates, givenState) < 0, message);
} catch (Exception exception) {
assertThat(exception).isInstanceOf(IllegalStateException.class);
assertThat(exception).hasNoCause();
assertThat(exception).hasMessage(message);
}
assertThatThrownBy(() -> checkState(Arrays.binarySearch(validStates, givenState) > 0, message)).isInstanceOf(IllegalStateException.class).hasMessageStartingWith(message).hasNoCause();
}
@Test
@ -174,13 +112,8 @@ public class GuavaPreConditionsTest {
final int[] validStates = { -1, 0, 1 };
final int givenState = 10;
final String message = "State can't be %s, It can be one of %s.";
try {
checkState(Arrays.binarySearch(validStates, givenState) < 0, message, givenState, Arrays.toString(validStates));
} catch (Exception exception) {
assertThat(exception).isInstanceOf(IllegalStateException.class);
assertThat(exception).hasNoCause();
assertThat(exception).hasMessage(message, givenState, Arrays.toString(validStates));
}
}
assertThatThrownBy(() -> checkState(Arrays.binarySearch(validStates, givenState) > 0, message, givenState, Arrays.toString(validStates))).isInstanceOf(IllegalStateException.class).hasMessage(message, givenState, Arrays.toString(validStates))
.hasNoCause();
}
}