fix: docs for graphQlTester & constructor for documentSource

spring-graphql-docs/modules/ROOT/pages/testing.adoc

@@ -182,7 +182,7 @@ xref:testing.adoc#testing.requests[execute requests] using the same API, indepen
 === Builder
 
 `GraphQlTester` defines a parent `Builder` with common configuration options for the
-builders of all extensions. It lets you configure the following:
+builders of all extensions. These include builders like the one of the ExecutionGraphQlServiceTester, listed above. It lets you configure at least the following:
 
 - `errorFilter` - a predicate to suppress expected errors, so you can inspect the data
 of the response.
@@ -191,8 +191,7 @@ the classpath or from anywhere else.
 - `responseTimeout` - how long to wait for request execution to complete before timing
 out.
 
-
-
+include-code::GraphQlTesterBuilder[tag=inlineDocument,indent=0]
 
 [[testing.requests]]
 == Requests

spring-graphql-docs/src/main/java/org/springframework/graphql/docs/testing/graphqltester/builder/GraphQlTesterBuilder.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2020-present 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.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.graphql.docs.testing.graphqltester.builder;
+
+import java.time.Duration;
+import java.util.function.Predicate;
+
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.graphql.ResponseError;
+import org.springframework.graphql.client.GraphQlTransport;
+import org.springframework.graphql.support.DocumentSource;
+import org.springframework.graphql.support.ResourceDocumentSource;
+import org.springframework.graphql.test.tester.GraphQlTester;
+
+public class GraphQlTesterBuilder {
+
+	void inlineDocument() {
+		// tag::inlineDocument[]
+		GraphQlTransport transport = /**/ null;
+		Predicate<ResponseError> errorFilter = /**/ null;
+		ClassPathResource resource = new ClassPathResource("custom-folder/");
+		DocumentSource documentSource = new ResourceDocumentSource(resource);
+
+		GraphQlTester.builder(transport)
+				.documentSource(documentSource)
+				.errorFilter(errorFilter)
+				.responseTimeout(Duration.ofSeconds(5))
+				.build();
+		// end::inlineDocument[]
+	}
+
+}

spring-graphql/src/main/java/org/springframework/graphql/support/ResourceDocumentSource.java

@@ -34,10 +34,11 @@
 import org.springframework.util.FileCopyUtils;
 
 /**
- * {@link DocumentSource} that looks for a document {@link Resource} under a set
- * of locations and trying a number of different file extension.
+ * {@link DocumentSource} that searches for document {@link Resource}s across
+ * multiple locations while trying different file extensions.
  *
  * @author Rossen Stoyanchev
+ * @author Marco Schäck
  * @since 1.0.0
  */
 public class ResourceDocumentSource implements DocumentSource {
@@ -61,6 +62,14 @@ public ResourceDocumentSource() {
 		this(Collections.singletonList(new ClassPathResource("graphql/")), FILE_EXTENSIONS);
 	}
 
+	/**
+	 * Constructor with a single location and the default file extensions.
+	 * @param location the resource location
+	 */
+	public ResourceDocumentSource(Resource location) {
+		this(Collections.singletonList(location), FILE_EXTENSIONS);
+	}
+
 	/**
 	 * Constructor with given locations and extensions.
 	 * @param locations the resource locations

spring-graphql/src/test/java/org/springframework/graphql/support/ResourceDocumentSourceTests.java

@@ -19,7 +19,7 @@
 import java.time.Duration;
 import java.util.Collections;
 
-import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
 import reactor.test.StepVerifier;
 
@@ -30,33 +30,75 @@
 /**
  * Unit tests for {@link ResourceDocumentSource}.
  * @author Rossen Stoyanchev
+ * @author Marco Schäck
  */
 class ResourceDocumentSourceTests {
 
-	private ResourceDocumentSource source;
+	@Nested
+	class DefaultConstructorTests {
 
+		@Test
+		void getDocument() {
+			ResourceDocumentSource source = new ResourceDocumentSource();
+			String content = source.getDocument("test-document").block(Duration.ofSeconds(5));
+			assertThat(content).startsWith("query GetUser($id: ID!)");
+		}
 
-	@BeforeEach
-	void setUp() {
-		this.source = new ResourceDocumentSource(
-				Collections.singletonList(new ClassPathResource("books/")),
-				ResourceDocumentSource.FILE_EXTENSIONS);
+		@Test
+		void getDocumentNotFound() {
+			ResourceDocumentSource source = new ResourceDocumentSource();
+			StepVerifier.create(source.getDocument("invalid"))
+					.expectErrorMessage(
+							"Failed to find document, name='invalid', " +
+									"under location(s)=[class path resource [graphql/]]")
+					.verify(Duration.ofSeconds(5));
+		}
 	}
 
+	@Nested
+	class SingleResourceConstructorTests {
 
-	@Test
-	void getDocument() {
-		String content = this.source.getDocument("book-document").block(Duration.ofSeconds(5));
-		assertThat(content).startsWith("bookById(id:\"1\"");
+		@Test
+		void getDocument() {
+			ResourceDocumentSource source = new ResourceDocumentSource(new ClassPathResource("books/"));
+			String content = source.getDocument("book-document").block(Duration.ofSeconds(5));
+			assertThat(content).startsWith("bookById(id:\"1\"");
+		}
+
+		@Test
+		void getDocumentNotFound() {
+			ResourceDocumentSource source = new ResourceDocumentSource(new ClassPathResource("books/"));
+			StepVerifier.create(source.getDocument("invalid"))
+					.expectErrorMessage(
+							"Failed to find document, name='invalid', " +
+									"under location(s)=[class path resource [books/]]")
+					.verify(Duration.ofSeconds(5));
+		}
 	}
 
-	@Test
-	void getDocumentNotFound() {
-		StepVerifier.create(this.source.getDocument("invalid"))
-				.expectErrorMessage(
-						"Failed to find document, name='invalid', " +
-								"under location(s)=[class path resource [books/]]")
-				.verify(Duration.ofSeconds(5));
+	@Nested
+	class ListResourceConstructorTests {
+
+		@Test
+		void getDocument() {
+			ResourceDocumentSource source = new ResourceDocumentSource(
+					Collections.singletonList(new ClassPathResource("books/")),
+					ResourceDocumentSource.FILE_EXTENSIONS);
+			String content = source.getDocument("book-document").block(Duration.ofSeconds(5));
+			assertThat(content).startsWith("bookById(id:\"1\"");
+		}
+
+		@Test
+		void getDocumentNotFound() {
+			ResourceDocumentSource source = new ResourceDocumentSource(
+					Collections.singletonList(new ClassPathResource("books/")),
+					ResourceDocumentSource.FILE_EXTENSIONS);
+			StepVerifier.create(source.getDocument("invalid"))
+					.expectErrorMessage(
+							"Failed to find document, name='invalid', " +
+									"under location(s)=[class path resource [books/]]")
+					.verify(Duration.ofSeconds(5));
+		}
 	}
 
 }

spring-graphql/src/test/resources/graphql/test-document.graphql

@@ -0,0 +1,7 @@
+query GetUser($id: ID!) {
+    user(id: $id) {
+        id
+        name
+        email
+    }
+}