Merge branch '5.2.x'

spring-test/src/main/java/org/springframework/test/util/JsonPathExpectationsHelper.java

@@ -26,6 +26,7 @@ import org.hamcrest.MatcherAssert;
 
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
+import org.springframework.util.ClassUtils;
 import org.springframework.util.ObjectUtils;
 import org.springframework.util.StringUtils;
 
@@ -108,10 +109,18 @@ public class JsonPathExpectationsHelper {
 			}
 			actualValue = actualValueList.get(0);
 		}
-		else if (actualValue != null && expectedValue != null) {
-			if (!actualValue.getClass().equals(expectedValue.getClass())) {
+		else if (actualValue != null && expectedValue != null &&
+				!actualValue.getClass().equals(expectedValue.getClass())) {
+			try {
 				actualValue = evaluateJsonPath(content, expectedValue.getClass());
 			}
+			catch (AssertionError error) {
+				String message = String.format(
+					"At JSON path \"%s\", value <%s> of type <%s> cannot be converted to type <%s>",
+					this.expression, actualValue, ClassUtils.getDescriptiveType(actualValue),
+					ClassUtils.getDescriptiveType(expectedValue));
+				throw new AssertionError(message, error.getCause());
+			}
 		}
 		AssertionErrors.assertEquals("JSON path \"" + this.expression + "\"", expectedValue, actualValue);
 	}
@@ -298,7 +307,7 @@ public class JsonPathExpectationsHelper {
 
 	/**
 	 * Variant of {@link #evaluateJsonPath(String)} with a target type.
-	 * This can be useful for matching numbers reliably for example coercing an
+	 * <p>This can be useful for matching numbers reliably for example coercing an
 	 * integer into a double.
 	 * @param content the content to evaluate against
 	 * @return the result of the evaluation

spring-test/src/test/java/org/springframework/test/util/JsonPathExpectationsHelperTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2019 the original author or authors.
+ * Copyright 2004-2020 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.
@@ -67,12 +67,12 @@ class JsonPathExpectationsHelperTests {
 	}
 
 	@Test
-	void existsForIndefinatePathWithResults() throws Exception {
+	void existsForIndefinitePathWithResults() throws Exception {
 		new JsonPathExpectationsHelper("$.familyMembers[?(@.name == 'Bart')]").exists(SIMPSONS);
 	}
 
 	@Test
-	void existsForIndefinatePathWithEmptyResults() throws Exception {
+	void existsForIndefinitePathWithEmptyResults() throws Exception {
 		String expression = "$.familyMembers[?(@.name == 'Dilbert')]";
 		assertThatExceptionOfType(AssertionError.class).isThrownBy(() ->
 				new JsonPathExpectationsHelper(expression).exists(SIMPSONS))
@@ -101,7 +101,7 @@ class JsonPathExpectationsHelperTests {
 	}
 
 	@Test
-	void doesNotExistForIndefinatePathWithResults() throws Exception {
+	void doesNotExistForIndefinitePathWithResults() throws Exception {
 		String expression = "$.familyMembers[?(@.name == 'Bart')]";
 		assertThatExceptionOfType(AssertionError.class).isThrownBy(() ->
 				new JsonPathExpectationsHelper(expression).doesNotExist(SIMPSONS))
@@ -109,7 +109,7 @@ class JsonPathExpectationsHelperTests {
 	}
 
 	@Test
-	void doesNotExistForIndefinatePathWithEmptyResults() throws Exception {
+	void doesNotExistForIndefinitePathWithEmptyResults() throws Exception {
 		new JsonPathExpectationsHelper("$.familyMembers[?(@.name == 'Dilbert')]").doesNotExist(SIMPSONS);
 	}
 
@@ -129,12 +129,12 @@ class JsonPathExpectationsHelperTests {
 	}
 
 	@Test
-	void assertValueIsEmptyForIndefinatePathWithEmptyResults() throws Exception {
+	void assertValueIsEmptyForIndefinitePathWithEmptyResults() throws Exception {
 		new JsonPathExpectationsHelper("$.familyMembers[?(@.name == 'Dilbert')]").assertValueIsEmpty(SIMPSONS);
 	}
 
 	@Test
-	void assertValueIsEmptyForIndefinatePathWithResults() throws Exception {
+	void assertValueIsEmptyForIndefinitePathWithResults() throws Exception {
 		String expression = "$.familyMembers[?(@.name == 'Bart')]";
 		assertThatExceptionOfType(AssertionError.class).isThrownBy(() ->
 				new JsonPathExpectationsHelper(expression).assertValueIsEmpty(SIMPSONS))
@@ -175,12 +175,12 @@ class JsonPathExpectationsHelperTests {
 	}
 
 	@Test
-	void assertValueIsNotEmptyForIndefinatePathWithResults() throws Exception {
+	void assertValueIsNotEmptyForIndefinitePathWithResults() throws Exception {
 		new JsonPathExpectationsHelper("$.familyMembers[?(@.name == 'Bart')]").assertValueIsNotEmpty(SIMPSONS);
 	}
 
 	@Test
-	void assertValueIsNotEmptyForIndefinatePathWithEmptyResults() throws Exception {
+	void assertValueIsNotEmptyForIndefinitePathWithEmptyResults() throws Exception {
 		String expression = "$.familyMembers[?(@.name == 'Dilbert')]";
 		assertThatExceptionOfType(AssertionError.class).isThrownBy(() ->
 				new JsonPathExpectationsHelper(expression).assertValueIsNotEmpty(SIMPSONS))
@@ -222,12 +222,12 @@ class JsonPathExpectationsHelperTests {
 	}
 
 	@Test
-	void hasJsonPathForIndefinatePathWithResults() {
+	void hasJsonPathForIndefinitePathWithResults() {
 		new JsonPathExpectationsHelper("$.familyMembers[?(@.name == 'Bart')]").hasJsonPath(SIMPSONS);
 	}
 
 	@Test
-	void hasJsonPathForIndefinatePathWithEmptyResults() {
+	void hasJsonPathForIndefinitePathWithEmptyResults() {
 		String expression = "$.familyMembers[?(@.name == 'Dilbert')]";
 		assertThatExceptionOfType(AssertionError.class).isThrownBy(() ->
 				new JsonPathExpectationsHelper(expression).hasJsonPath(SIMPSONS))
@@ -246,12 +246,12 @@ class JsonPathExpectationsHelperTests {
 	}
 
 	@Test
-	void doesNotHaveJsonPathForIndefinatePathWithEmptyResults() {
+	void doesNotHaveJsonPathForIndefinitePathWithEmptyResults() {
 		new JsonPathExpectationsHelper("$.familyMembers[?(@.name == 'Dilbert')]").doesNotHaveJsonPath(SIMPSONS);
 	}
 
 	@Test
-	void doesNotHaveEmptyPathForIndefinatePathWithResults() {
+	void doesNotHaveEmptyPathForIndefinitePathWithResults() {
 		String expression = "$.familyMembers[?(@.name == 'Bart')]";
 		assertThatExceptionOfType(AssertionError.class).isThrownBy(() ->
 				new JsonPathExpectationsHelper(expression).doesNotHaveJsonPath(SIMPSONS))

spring-test/src/test/java/org/springframework/test/web/servlet/result/JsonPathResultMatchersTests.java

@@ -64,9 +64,17 @@ public class JsonPathResultMatchersTests {
 	}
 
 	@Test
-	public void valueWithMismatch() throws Exception {
-		assertThatExceptionOfType(AssertionError.class).isThrownBy(() ->
-				new JsonPathResultMatchers("$.str").value("bogus").match(stubMvcResult));
+	public void valueWithValueMismatch() throws Exception {
+		assertThatExceptionOfType(AssertionError.class)
+			.isThrownBy(() -> new JsonPathResultMatchers("$.str").value("bogus").match(stubMvcResult))
+			.withMessage("JSON path \"$.str\" expected:<bogus> but was:<foo>");
+	}
+
+	@Test
+	public void valueWithTypeMismatch() throws Exception {
+		assertThatExceptionOfType(AssertionError.class)
+			.isThrownBy(() -> new JsonPathResultMatchers("$.str").value("bogus".getBytes()).match(stubMvcResult))
+			.withMessage("At JSON path \"$.str\", value <foo> of type <java.lang.String> cannot be converted to type <byte[]>");
 	}
 
 	@Test