Package org.springframework.test.util

Class JsonPathExpectationsHelper

java.lang.Object

org.springframework.test.util.JsonPathExpectationsHelper

public class JsonPathExpectationsHelper
extends Object

A helper class for applying assertions via JSON path expressions.

Based on the JsonPath project: requiring version 0.9+, with 1.1+ strongly recommended.

Since:

3.2

Author:

Rossen Stoyanchev, Juergen Hoeller, Craig Andrews, Sam Brannen

Constructor Summary

Constructors

Constructor	Description
JsonPathExpectationsHelper(String expression, Object... args)	Construct a new JsonPathExpectationsHelper.

Method Summary

Modifier and Type	Method	Description
void	assertValue(String content, Object expectedValue)	Evaluate the JSON path expression against the supplied content and assert that the result is equal to the expected value.
<T> void	assertValue(String content, Matcher<? super T> matcher)	Evaluate the JSON path expression against the supplied content and assert the resulting value with the given Matcher.
<T> void	assertValue(String content, Matcher<? super T> matcher, Class<T> targetType)	An overloaded variant of assertValue(String, Matcher) that also accepts a target type for the resulting value.
void	assertValueIsArray(String content)	Evaluate the JSON path expression against the supplied content and assert that the resulting value is an array.
void	assertValueIsBoolean(String content)	Evaluate the JSON path expression against the supplied content and assert that the resulting value is a Boolean.
void	assertValueIsEmpty(String content)	Evaluate the JSON path expression against the supplied content and assert that an empty value exists at the given path.
void	assertValueIsMap(String content)	Evaluate the JSON path expression against the supplied content and assert that the resulting value is a Map.
void	assertValueIsNotEmpty(String content)	Evaluate the JSON path expression against the supplied content and assert that a non-empty value exists at the given path.
void	assertValueIsNumber(String content)	Evaluate the JSON path expression against the supplied content and assert that the resulting value is a Number.
void	assertValueIsString(String content)	Evaluate the JSON path expression against the supplied content and assert that the resulting value is a String.
void	doesNotExist(String content)	Evaluate the JSON path expression against the supplied content and assert that a non-null value does not exist at the given path.
void	doesNotHaveJsonPath(String content)	Evaluate the JSON path expression against the supplied content and assert that a value, including null values, does not exist at the given path.
Object	evaluateJsonPath(String content)	Evaluate the JSON path and return the resulting value.
Object	evaluateJsonPath(String content, Class<?> targetType)	Variant of evaluateJsonPath(String) with a target type.
void	exists(String content)	Evaluate the JSON path expression against the supplied content and assert that a non-null value, possibly an empty array or map, exists at the given path.
void	hasJsonPath(String content)	Evaluate the JSON path expression against the supplied content and assert that a value, possibly null, exists.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

JsonPathExpectationsHelper

public JsonPathExpectationsHelper(String expression,
 Object... args)

Construct a new JsonPathExpectationsHelper.

Parameters:

expression - the JsonPath expression; never null or empty

args - arguments to parameterize the JsonPath expression with, using formatting specifiers defined in String.format(String, Object...)

Method Details

assertValue

public <T> void assertValue(String content,
 Matcher<? super T> matcher)

Evaluate the JSON path expression against the supplied content and assert the resulting value with the given Matcher.

Parameters:

content - the JSON content

matcher - the matcher with which to assert the result

assertValue

public <T> void assertValue(String content,
 Matcher<? super T> matcher,
 Class<T> targetType)

An overloaded variant of assertValue(String, Matcher) that also accepts a target type for the resulting value. This can be useful for matching numbers reliably for example coercing an integer into a double.

Parameters:

content - the JSON content

matcher - the matcher with which to assert the result

targetType - the expected type of the resulting value

Since:

4.3.3

assertValue

public void assertValue(String content,
 @Nullable
 Object expectedValue)

Evaluate the JSON path expression against the supplied content and assert that the result is equal to the expected value.

Parameters:

content - the JSON content

expectedValue - the expected value

assertValueIsString

public void assertValueIsString(String content)

Evaluate the JSON path expression against the supplied content and assert that the resulting value is a String.

Parameters:

content - the JSON content

Since:

4.2.1

assertValueIsBoolean

public void assertValueIsBoolean(String content)

Evaluate the JSON path expression against the supplied content and assert that the resulting value is a Boolean.

Parameters:

content - the JSON content

Since:

4.2.1

assertValueIsNumber

public void assertValueIsNumber(String content)

Evaluate the JSON path expression against the supplied content and assert that the resulting value is a Number.

Parameters:

content - the JSON content

Since:

4.2.1

assertValueIsArray

public void assertValueIsArray(String content)

Evaluate the JSON path expression against the supplied content and assert that the resulting value is an array.

Parameters:

content - the JSON content

assertValueIsMap

public void assertValueIsMap(String content)

Evaluate the JSON path expression against the supplied content and assert that the resulting value is a Map.

Parameters:

content - the JSON content

Since:

4.2.1

exists

public void exists(String content)

Evaluate the JSON path expression against the supplied content and assert that a non-null value, possibly an empty array or map, exists at the given path.

Note that if the JSON path expression is not definite, this method asserts that the list of values at the given path is not empty.

Parameters:

content - the JSON content

doesNotExist

public void doesNotExist(String content)

Evaluate the JSON path expression against the supplied content and assert that a non-null value does not exist at the given path.

Note that if the JSON path expression is not definite, this method asserts that the list of values at the given path is empty.

Parameters:

content - the JSON content

assertValueIsEmpty

public void assertValueIsEmpty(String content)

Evaluate the JSON path expression against the supplied content and assert that an empty value exists at the given path.

For the semantics of empty, consult the Javadoc for ObjectUtils.isEmpty(Object).

Parameters:

content - the JSON content

assertValueIsNotEmpty

public void assertValueIsNotEmpty(String content)

Evaluate the JSON path expression against the supplied content and assert that a non-empty value exists at the given path.

For the semantics of empty, consult the Javadoc for ObjectUtils.isEmpty(Object).

Parameters:

content - the JSON content

hasJsonPath

public void hasJsonPath(String content)

Evaluate the JSON path expression against the supplied content and assert that a value, possibly null, exists.

If the JSON path expression is not definite, this method asserts that the list of values at the given path is not empty.

Parameters:

content - the JSON content

Since:

5.0.3

doesNotHaveJsonPath

public void doesNotHaveJsonPath(String content)

Evaluate the JSON path expression against the supplied content and assert that a value, including null values, does not exist at the given path.

If the JSON path expression is not definite, this method asserts that the list of values at the given path is empty.

Parameters:

content - the JSON content

Since:

5.0.3

evaluateJsonPath

@Nullable
public Object evaluateJsonPath(String content)

Evaluate the JSON path and return the resulting value.

Parameters:

content - the content to evaluate against

Returns:

the result of the evaluation

Throws:

AssertionError - if the evaluation fails

evaluateJsonPath

public Object evaluateJsonPath(String content,
 Class<?> targetType)

Variant of evaluateJsonPath(String) with a target type.

This can be useful for matching numbers reliably for example coercing an integer into a double.

Parameters:

content - the content to evaluate against

Returns:

the result of the evaluation

Throws:

AssertionError - if the evaluation fails