Class DoubleSubject
 java.lang.Object

 com.google.common.truth.Subject

 com.google.common.truth.ComparableSubject<Double>

 com.google.common.truth.DoubleSubject

public final class DoubleSubject extends ComparableSubject<Double>
Propositions forDouble
subjects. Author:
 Kurt Alfred Kluever


Nested Class Summary
Nested Classes Modifier and Type Class Description static class
DoubleSubject.TolerantDoubleComparison
A partially specified check about an approximate relationship to adouble
subject using a tolerance.
Nested classes/interfaces inherited from class com.google.common.truth.Subject
Subject.Factory<SubjectT extends Subject,ActualT>


Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description void
isAtLeast(int other)
Checks that the subject is greater than or equal toother
.void
isAtMost(int other)
Checks that the subject is less than or equal toother
.void
isEqualTo(@Nullable Object other)
Asserts that the subject is exactly equal to the given value, with equality defined as byDouble#equals
.void
isEquivalentAccordingToCompareTo(Double other)
Deprecated.UseisWithin(double)
orisEqualTo(java.lang.Object)
instead (see documentation for advice).void
isFinite()
Asserts that the subject is finite, i.e.void
isGreaterThan(int other)
Checks that the subject is greater thanother
.void
isLessThan(int other)
Checks that the subject is less thanother
.void
isNaN()
Asserts that the subject isDouble.NaN
.void
isNegativeInfinity()
Asserts that the subject isDouble.NEGATIVE_INFINITY
.void
isNonZero()
Asserts that the subject is a nonnull value other than zero (i.e.void
isNotEqualTo(@Nullable Object other)
Asserts that the subject is not exactly equal to the given value, with equality defined as byDouble#equals
.void
isNotNaN()
Asserts that the subject is a nonnull value other thanDouble.NaN
(but it may beDouble.POSITIVE_INFINITY
orDouble.NEGATIVE_INFINITY
).DoubleSubject.TolerantDoubleComparison
isNotWithin(double tolerance)
Prepares for a check that the subject is a finite number not within the given tolerance of an expected value that will be provided in the next call in the fluent chain.void
isPositiveInfinity()
Asserts that the subject isDouble.POSITIVE_INFINITY
.DoubleSubject.TolerantDoubleComparison
isWithin(double tolerance)
Prepares for a check that the subject is a finite number within the given tolerance of an expected value that will be provided in the next call in the fluent chain.void
isZero()
Asserts that the subject is zero (i.e.
Methods inherited from class com.google.common.truth.ComparableSubject
isAtLeast, isAtMost, isGreaterThan, isIn, isLessThan, isNotIn

Methods inherited from class com.google.common.truth.Subject
actualCustomStringRepresentation, check, equals, failWithActual, failWithActual, failWithoutActual, hashCode, ignoreCheck, isAnyOf, isIn, isInstanceOf, isNoneOf, isNotIn, isNotInstanceOf, isNotNull, isNotSameInstanceAs, isNull, isSameInstanceAs, toString




Method Detail

isWithin
public DoubleSubject.TolerantDoubleComparison isWithin(double tolerance)
Prepares for a check that the subject is a finite number within the given tolerance of an expected value that will be provided in the next call in the fluent chain.The check will fail if either the subject or the object is
Double.POSITIVE_INFINITY
,Double.NEGATIVE_INFINITY
, orDouble.NaN
. To check for those values, useisPositiveInfinity()
,isNegativeInfinity()
,isNaN()
, or (with more generality)isEqualTo(java.lang.Object)
.The check will pass if both values are zero, even if one is
0.0
and the other is0.0
. Use#isEqualTo
to assert that a value is exactly0.0
or that it is exactly0.0
.You can use a tolerance of
0.0
to assert the exact equality of finite doubles, but oftenisEqualTo(java.lang.Object)
is preferable (note the different behaviours around nonfinite values and0.0
). See the documentation onisEqualTo(java.lang.Object)
for advice on when exact equality assertions are appropriate. Parameters:
tolerance
 an inclusive upper bound on the difference between the subject and object allowed by the check, which must be a nonnegative finite value, i.e. notDouble.NaN
,Double.POSITIVE_INFINITY
, or negative, including0.0

isNotWithin
public DoubleSubject.TolerantDoubleComparison isNotWithin(double tolerance)
Prepares for a check that the subject is a finite number not within the given tolerance of an expected value that will be provided in the next call in the fluent chain.The check will fail if either the subject or the object is
Double.POSITIVE_INFINITY
,Double.NEGATIVE_INFINITY
, orDouble.NaN
. SeeisFinite()
,isNotNaN()
, orisNotEqualTo(java.lang.Object)
for checks with other behaviours.The check will fail if both values are zero, even if one is
0.0
and the other is0.0
. Use#isNotEqualTo
for a test which fails for a value of exactly zero with one sign but passes for zero with the opposite sign.You can use a tolerance of
0.0
to assert the exact nonequality of finite doubles, but sometimesisNotEqualTo(java.lang.Object)
is preferable (note the different behaviours around nonfinite values and0.0
). Parameters:
tolerance
 an exclusive lower bound on the difference between the subject and object allowed by the check, which must be a nonnegative finite value, i.e. notDouble.NaN
,Double.POSITIVE_INFINITY
, or negative, including0.0

isEqualTo
public final void isEqualTo(@Nullable Object other)
Asserts that the subject is exactly equal to the given value, with equality defined as byDouble#equals
. This method is not recommended when the code under test is doing any kind of arithmetic: useisWithin(double)
with a suitable tolerance in that case. (Remember that the exact result of floating point arithmetic is sensitive to apparently trivial changes such as replacing(a + b) + c
witha + (b + c)
, and that unlessstrictfp
is in force even the result of(a + b) + c
is sensitive to the JVM's choice of precision for the intermediate result.) This method is recommended when the code under test is specified as either copying a value without modification from its input or returning a welldefined literal or constant value.Note: The assertion
isEqualTo(0.0)
fails for an input of0.0
, and vice versa. For an assertion that passes for either0.0
or0.0
, useisZero()
.

isNotEqualTo
public final void isNotEqualTo(@Nullable Object other)
Asserts that the subject is not exactly equal to the given value, with equality defined as byDouble#equals
. SeeisEqualTo(java.lang.Object)
for advice on when exact equality is recommended. UseisNotWithin(double)
for an assertion with a tolerance.Note: The assertion
isNotEqualTo(0.0)
passes for0.0
, and vice versa. For an assertion that fails for either0.0
or0.0
, useisNonZero()
. Overrides:
isNotEqualTo
in classSubject

isEquivalentAccordingToCompareTo
@Deprecated public final void isEquivalentAccordingToCompareTo(Double other)
Deprecated.UseisWithin(double)
orisEqualTo(java.lang.Object)
instead (see documentation for advice).Description copied from class:ComparableSubject
Checks that the subject is equivalent toother
according toComparable.compareTo(T)
, (i.e., checks thata.comparesTo(b) == 0
).Note: Do not use this method for checking object equality. Instead, use
Subject.isEqualTo(Object)
. Overrides:
isEquivalentAccordingToCompareTo
in classComparableSubject<Double>

isZero
public final void isZero()
Asserts that the subject is zero (i.e. it is either0.0
or0.0
).

isNonZero
public final void isNonZero()
Asserts that the subject is a nonnull value other than zero (i.e. it is not0.0
,0.0
ornull
).

isPositiveInfinity
public final void isPositiveInfinity()
Asserts that the subject isDouble.POSITIVE_INFINITY
.

isNegativeInfinity
public final void isNegativeInfinity()
Asserts that the subject isDouble.NEGATIVE_INFINITY
.

isNaN
public final void isNaN()
Asserts that the subject isDouble.NaN
.

isFinite
public final void isFinite()
Asserts that the subject is finite, i.e. notDouble.POSITIVE_INFINITY
,Double.NEGATIVE_INFINITY
, orDouble.NaN
.

isNotNaN
public final void isNotNaN()
Asserts that the subject is a nonnull value other thanDouble.NaN
(but it may beDouble.POSITIVE_INFINITY
orDouble.NEGATIVE_INFINITY
).

isGreaterThan
public final void isGreaterThan(int other)
Checks that the subject is greater thanother
.To check that the subject is greater than or equal to
other
, useisAtLeast(int)
.

isLessThan
public final void isLessThan(int other)
Checks that the subject is less thanother
.To check that the subject is less than or equal to
other
, useisAtMost(int)
.

isAtMost
public final void isAtMost(int other)
Checks that the subject is less than or equal toother
.To check that the subject is strictly less than
other
, useisLessThan(int)
.

isAtLeast
public final void isAtLeast(int other)
Checks that the subject is greater than or equal toother
.To check that the subject is strictly greater than
other
, useisGreaterThan(int)
.

