com.fitbur.assertj.api.NumberAssert Maven / Gradle / Ivy
/**
* 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.
*
* Copyright 2012-2016 the original author or authors.
*/
package com.fitbur.assertj.api;
import com.fitbur.assertj.data.Offset;
import com.fitbur.assertj.data.Percentage;
/**
* Assertion methods applicable to {@link Number}s.
*
* @param the "self" type of this assertion class. Please read "Emulating
* 'self types' using Java Generics to simplify fluent API implementation" for more details.
* @param the type of the "actual" value.
*
* @author Alex Ruiz
* @author Nicolas François
* @author Mikhail Mazursky
*/
public interface NumberAssert, A extends Number> {
/**
* Verifies that the actual value is equal to zero.
*
* Example:
* int intZero = 0;
* long longZero = 0L;
*
* // assertions will pass
* assertThat(intZero).isZero();
* assertThat(longZero).isZero();
*
* int meaningOfLife = 42;
* double someOfPi = 3.142;
*
* // assertions will fail
* assertThat(meaningOfLife).isZero();
* assertThat(someOfPi).isZero();
*
* @return this assertion object.
* @throws AssertionError if the actual value is {@code null}.
* @throws AssertionError if the actual value is not equal to zero.
*/
S isZero();
/**
* Verifies that the actual value is not equal to zero.
*
* Example:
* int meaningOfLife = 42;
* double someOfPi = 3.142;
*
* // assertions will pass
* assertThat(meaningOfLife).isNotZero();
* assertThat(someOfPi).isNotZero();
*
* int intZero = 0;
* long longZero = 0L;
*
* // assertions will fail
* assertThat(intZero).isNotZero();
* assertThat(longZero).isNotZero();
*
* @return this assertion object.
* @throws AssertionError if the actual value is {@code null}.
* @throws AssertionError if the actual value is equal to zero.
*/
S isNotZero();
/**
* Verifies that the actual value is positive.
*
* Example:
* int positive = 42;
* int zero = 0;
* int negative = -42;
*
* // assertions will pass
* assertThat(positive).isPositive();
*
* // assertions will fail
* assertThat(zero).isPositive();
* assertThat(negative).isPositive();
*
* @return this assertion object.
* @throws AssertionError if the actual value is {@code null}.
* @throws AssertionError if the actual value is not positive.
*/
S isPositive();
/**
* Verifies that the actual value is negative.
*
* Example:
* int positive = 42;
* int zero = 0;
* int negative = -42;
*
* // assertions will pass
* assertThat(negative).isNegative();
*
* // assertions will fail
* assertThat(zero).isNegative();
* assertThat(positive).isNegative();
*
* @return this assertion object.
* @throws AssertionError if the actual value is {@code null}.
* @throws AssertionError if the actual value is not negative.
*/
S isNegative();
/**
* Verifies that the actual value is non negative (positive or equal zero).
*
* Example:
* int positive = 42;
* int zero = 0;
* int negative = -42;
*
* // assertions will pass
* assertThat(positive).isNotNegative();
* assertThat(zero).isNotNegative();
*
* // assertions will fail
* assertThat(negative).isNotNegative();
*
* @return {@code this} assertion object.
* @throws AssertionError if the actual value is {@code null}.
* @throws AssertionError if the actual value is not non negative.
*/
S isNotNegative();
/**
* Verifies that the actual value is non positive (negative or equal zero).
*
* Example:
* int positive = 42;
* int zero = 0;
* int negative = -42;
*
* // assertions will pass
* assertThat(negative).isNotPositive();
* assertThat(zero).isNotPositive();
*
* // assertions will fail
* assertThat(positive).isNotPositive();
*
* @return {@code this} assertion object.
* @throws AssertionError if the actual value is {@code null}.
* @throws AssertionError if the actual value is not non positive.
*/
S isNotPositive();
/**
* Verifies that the actual value is in [start, end] range (start included, end included).
*
* Example:
* // these assertions succeed ...
* assertThat(12).isBetween(10, 14);
* assertThat(12).isBetween(12, 14);
* assertThat(12).isBetween(10, 12);
*
* // ... but this one fails
* assertThat(12).isBetween(14, 16);
*
* @param start the start value (inclusive), expected not to be null.
* @param end the end value (inclusive), expected not to be null.
* @return this assertion object.
* @throws AssertionError if the actual value is {@code null}.
* @throws NullPointerException if start value is {@code null}.
* @throws NullPointerException if end value is {@code null}.
* @throws AssertionError if the actual value is not in [start, end] range.
*/
S isBetween(A start, A end);
/**
* Verifies that the actual value is in ]start, end[ range (start excluded, end excluded).
*
* Example:
* // this assertion succeeds ...
* assertThat(12).isBetween(10, 14);
*
* // ... but these ones fail
* assertThat(12).isBetween(12, 14);
* assertThat(12).isBetween(10, 12);
* assertThat(12).isBetween(16, 18);
*
* @param start the start value (exclusive), expected not to be null.
* @param end the end value (exclusive), expected not to be null.
* @return this assertion object.
* @throws AssertionError if the actual value is {@code null}.
* @throws NullPointerException if start value is {@code null}.
* @throws NullPointerException if end value is {@code null}.
* @throws AssertionError if the actual value is not in ]start, end[ range.
*/
S isStrictlyBetween(A start, A end);
/**
* Verifies that the actual number is close to the given one within the given offset.
* If difference is equal to offset value, assertion is considered valid.
*
* Example with double:
*
// assertions will pass:
* assertThat(8.1).isCloseTo(new Double(8.0), within(0.2));
*
* // you can use offset if you prefer
* assertThat(8.1).isCloseTo(new Double(8.0), offset(0.2));
*
* // if difference is exactly equals to the offset (0.1), it's ok
* assertThat(8.1).isCloseTo(new Double(8.0), within(0.1));
*
* // assertion will fail
* assertThat(8.1).isCloseTo(new Double(8.0), within(0.01));
*
* @param expected the given number to compare the actual value to.
* @param offset the given positive offset.
* @return {@code this} assertion object.
* @throws NullPointerException if the given offset is {@code null}.
* @throws NullPointerException if the expected number is {@code null}.
* @throws AssertionError if the actual value is not equal to the given one.
*/
S isCloseTo(A expected, Offset offset);
/**
* Verifies that the actual number is close to the given one within the given percentage.
* If difference is equal to the percentage value, assertion is considered valid.
*
* Example with double:
*
// assertions will pass:
* assertThat(11.0).isCloseTo(new Double(10.0), withinPercentage(20d));
*
* // if difference is exactly equals to the computed offset (1.0), it's ok
* assertThat(11.0).isCloseTo(new Double(10.0), withinPercentage(10d));
*
* // assertion will fail
* assertThat(11.0).isCloseTo(new Double(10.0), withinPercentage(5d));
*
* @param expected the given number to compare the actual value to.
* @param percentage the given positive percentage.
* @return {@code this} assertion object.
* @throws NullPointerException if the given offset is {@code null}.
* @throws NullPointerException if the expected number is {@code null}.
* @throws AssertionError if the actual value is not equal to the given one.
*/
S isCloseTo(A expected, Percentage percentage);
}
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