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Support target type in JsonPath assertions for MockMvc results

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This commit picks up where SPR-14498 left off by adding support for an
explicit target type when using JsonPath to perform an assertion against
the response content using a Hamcrest Matcher.

Specifically, there is a new overloaded value(Matcher<T>, Class<T>)
method in JsonPathResultMatchers for use with Hamcrest matchers where
the target type (i.e., Class<T>) can be specified.

Issue: SPR-16587
This commit is contained in:
Sam Brannen
2018-03-13 15:55:39 +01:00
parent d64f2eb038
commit 2c2ce55f47
7 changed files with 71 additions and 26 deletions
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6
spring-test/src/main/java/org/springframework/test/util/JsonPathExpectationsHelper.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2017 the original author or authors.
* Copyright 2002-2018 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -282,21 +282,21 @@ public class JsonPathExpectationsHelper {
@Nullable
private Object evaluateJsonPath(String content) {
String message = "No value at JSON path \"" + this.expression + "\"";
try {
return this.jsonPath.read(content);
}
catch (Throwable ex) {
String message = "No value at JSON path \"" + this.expression + "\"";
throw new AssertionError(message, ex);
}
}
private Object evaluateJsonPath(String content, Class<?> targetType) {
String message = "No value at JSON path \"" + this.expression + "\"";
try {
return JsonPath.parse(content).read(this.expression, targetType);
}
catch (Throwable ex) {
String message = "No value at JSON path \"" + this.expression + "\"";
throw new AssertionError(message, ex);
}
}

12
spring-test/src/main/java/org/springframework/test/web/client/match/JsonPathRequestMatchers.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2016 the original author or authors.
* Copyright 2002-2018 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -30,6 +30,7 @@ import org.springframework.test.web.client.RequestMatcher;
/**
* Factory for assertions on the request content using
* <a href="https://github.com/jayway/JsonPath">JsonPath</a> expressions.
*
* <p>An instance of this class is typically accessed via
* {@link MockRestRequestMatchers#jsonPath(String, Matcher)} or
* {@link MockRestRequestMatchers#jsonPath(String, Object...)}.
@@ -70,10 +71,11 @@ public class JsonPathRequestMatchers {
}
/**
* An overloaded variant of (@link {@link #value(Matcher)} that also
* accepts a target type for the resulting value that the matcher can work
* reliably against. This can be useful for matching numbers reliably for
* example coercing an integer into a double.
* An overloaded variant of {@link #value(Matcher)} that also accepts a
* target type for the resulting value that the matcher can work reliably
* against.
* <p>This can be useful for matching numbers reliably &mdash; for example,
* to coerce an integer into a double.
* @since 4.3.3
*/
public <T> RequestMatcher value(final Matcher<T> matcher, final Class<T> targetType) {

2
spring-test/src/main/java/org/springframework/test/web/client/match/MockRestRequestMatchers.java
View File

@@ -199,7 +199,7 @@ public abstract class MockRestRequestMatchers {
* @param expression the JSON path optionally parameterized with arguments
* @param args arguments to parameterize the JSON path expression with
*/
public static JsonPathRequestMatchers jsonPath(String expression, Object ... args) {
public static JsonPathRequestMatchers jsonPath(String expression, Object... args) {
return new JsonPathRequestMatchers(expression, args);
}

27
spring-test/src/main/java/org/springframework/test/web/servlet/result/JsonPathResultMatchers.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2017 the original author or authors.
* Copyright 2002-2018 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -80,19 +80,40 @@ public class JsonPathResultMatchers {
/**
* Evaluate the JSON path expression against the response content and
* assert the resulting value with the given Hamcrest {@link Matcher}.
* @see #value(Matcher, Class)
* @see #value(Object)
*/
public <T> ResultMatcher value(final Matcher<T> matcher) {
public <T> ResultMatcher value(Matcher<T> matcher) {
return result -> {
String content = getContent(result);
jsonPathHelper.assertValue(content, matcher);
};
}
/**
* An overloaded variant of {@link #value(Matcher)} that also accepts a
* target type for the resulting value that the matcher can work reliably
* against.
* <p>This can be useful for matching numbers reliably &mdash; for example,
* to coerce an integer into a double.
* @since 4.3.15
* @see #value(Matcher)
* @see #value(Object)
*/
public <T> ResultMatcher value(Matcher<T> matcher, Class<T> targetType) {
return result -> {
String content = getContent(result);
jsonPathHelper.assertValue(content, matcher, targetType);
};
}
/**
* Evaluate the JSON path expression against the response content and
* assert that the result is equal to the supplied value.
* @see #value(Matcher)
* @see #value(Matcher, Class)
*/
public ResultMatcher value(final Object expectedValue) {
public ResultMatcher value(Object expectedValue) {
return result -> jsonPathHelper.assertValue(getContent(result), expectedValue);
}

4
spring-test/src/main/java/org/springframework/test/web/servlet/result/MockMvcResultMatchers.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2017 the original author or authors.
* Copyright 2002-2018 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -186,7 +186,7 @@ public abstract class MockMvcResultMatchers {
* @param expression the JSON path expression, optionally parameterized with arguments
* @param args arguments to parameterize the JSON path expression with
*/
public static JsonPathResultMatchers jsonPath(String expression, Object ... args) {
public static JsonPathResultMatchers jsonPath(String expression, Object... args) {
return new JsonPathResultMatchers(expression, args);
}