Propagate ignoreUndocumentedParamteres with .and()

See gh-676

spring-restdocs-core/src/main/java/org/springframework/restdocs/request/AbstractParametersSnippet.java

@@ -148,6 +148,10 @@ protected final Map<String, ParameterDescriptor> getParameterDescriptors() {
 		return this.descriptorsByName;
 	}
 
+	protected final boolean isIgnoreUndocumentedParameters() {
+		return ignoreUndocumentedParameters;
+	}
+
 	/**
 	 * Returns a model for the given {@code descriptor}.
 	 * @param descriptor the descriptor

spring-restdocs-core/src/main/java/org/springframework/restdocs/request/RequestParametersSnippet.java

@@ -133,7 +133,7 @@ public RequestParametersSnippet and(ParameterDescriptor... additionalDescriptors
 	public RequestParametersSnippet and(List<ParameterDescriptor> additionalDescriptors) {
 		List<ParameterDescriptor> combinedDescriptors = new ArrayList<>(getParameterDescriptors().values());
 		combinedDescriptors.addAll(additionalDescriptors);
-		return new RequestParametersSnippet(combinedDescriptors, this.getAttributes());
+		return new RequestParametersSnippet(combinedDescriptors, this.getAttributes(), this.isIgnoreUndocumentedParameters());
 	}
 
 }

spring-restdocs-core/src/test/java/org/springframework/restdocs/request/RequestParametersSnippetTests.java

@@ -153,6 +153,15 @@ public void additionalDescriptors() throws IOException {
 				.is(tableWithHeader("Parameter", "Description").row("`a`", "one").row("`b`", "two"));
 	}
 
+	@Test
+	public void additionalDescriptorsWithRelaxedRequestParameters() throws IOException {
+		RequestDocumentation.relaxedRequestParameters(parameterWithName("a").description("one"))
+				.and(parameterWithName("b").description("two")).document(this.operationBuilder
+						.request("http://localhost").param("a", "bravo").param("b", "bravo").param("c", "undocumented").build());
+		assertThat(this.generatedSnippets.requestParameters())
+				.is(tableWithHeader("Parameter", "Description").row("`a`", "one").row("`b`", "two"));
+	}
+
 	@Test
 	public void requestParametersWithEscapedContent() throws IOException {
 		RequestDocumentation.requestParameters(parameterWithName("Foo|Bar").description("one|two"))