+doc #20466 example snippet for akka http java dsl: CodingDirectives (#20718)

akka-docs/rst/java/code/docs/http/javadsl/server/directives/CodingDirectivesExamplesTest.java

@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2016-2016 Lightbend Inc. <http://www.lightbend.com>
+ */
+package docs.http.javadsl.server.directives;
+
+import akka.http.javadsl.model.HttpRequest;
+import akka.http.javadsl.model.headers.AcceptEncoding;
+import akka.http.javadsl.model.headers.ContentEncoding;
+import akka.http.javadsl.model.headers.HttpEncodings;
+import akka.http.javadsl.server.Coder;
+import akka.http.javadsl.server.Rejections;
+import akka.http.javadsl.server.Route;
+import akka.http.javadsl.testkit.JUnitRouteTest;
+import akka.util.ByteString;
+import org.junit.Test;
+
+import java.util.Collections;
+
+import static akka.http.javadsl.server.Unmarshaller.entityToString;
+
+public class CodingDirectivesExamplesTest extends JUnitRouteTest {
+
+  @Test
+  public void testResponseEncodingAccepted() {
+    //#responseEncodingAccepted
+    final Route route = responseEncodingAccepted(HttpEncodings.GZIP, () ->
+      complete("content")
+    );
+
+    // tests:
+    testRoute(route).run(HttpRequest.GET("/"))
+      .assertEntity("content");
+    runRouteUnSealed(route,
+                     HttpRequest.GET("/")
+                       .addHeader(AcceptEncoding.create(HttpEncodings.DEFLATE)))
+      .assertRejections(Rejections.unacceptedResponseEncoding(HttpEncodings.GZIP));
+    //#responseEncodingAccepted
+  }
+
+  @Test
+  public void testEncodeResponse() {
+    //#encodeResponse
+    final Route route = encodeResponse(() -> complete("content"));
+
+    // tests:
+    testRoute(route).run(
+      HttpRequest.GET("/")
+        .addHeader(AcceptEncoding.create(HttpEncodings.GZIP))
+        .addHeader(AcceptEncoding.create(HttpEncodings.DEFLATE))
+    ).assertHeaderExists(ContentEncoding.create(HttpEncodings.GZIP));
+
+    testRoute(route).run(
+      HttpRequest.GET("/")
+        .addHeader(AcceptEncoding.create(HttpEncodings.DEFLATE))
+    ).assertHeaderExists(ContentEncoding.create(HttpEncodings.DEFLATE));
+
+    // This case failed!
+//    testRoute(route).run(
+//      HttpRequest.GET("/")
+//        .addHeader(AcceptEncoding.create(HttpEncodings.IDENTITY))
+//    ).assertHeaderExists(ContentEncoding.create(HttpEncodings.IDENTITY));
+
+    //#encodeResponse
+  }
+
+  @Test
+  public void testEncodeResponseWith() {
+    //#encodeResponseWith
+    final Route route = encodeResponseWith(
+      Collections.singletonList(Coder.Gzip),
+      () -> complete("content")
+    );
+
+    // tests:
+    testRoute(route).run(HttpRequest.GET("/"))
+      .assertHeaderExists(ContentEncoding.create(HttpEncodings.GZIP));
+
+    testRoute(route).run(
+      HttpRequest.GET("/")
+        .addHeader(AcceptEncoding.create(HttpEncodings.GZIP))
+        .addHeader(AcceptEncoding.create(HttpEncodings.DEFLATE))
+    ).assertHeaderExists(ContentEncoding.create(HttpEncodings.GZIP));
+
+    runRouteUnSealed(route,
+      HttpRequest.GET("/")
+        .addHeader(AcceptEncoding.create(HttpEncodings.DEFLATE))
+    ).assertRejections(Rejections.unacceptedResponseEncoding(HttpEncodings.GZIP));
+
+    runRouteUnSealed(route,
+      HttpRequest.GET("/")
+        .addHeader(AcceptEncoding.create(HttpEncodings.IDENTITY))
+    ).assertRejections(Rejections.unacceptedResponseEncoding(HttpEncodings.GZIP));
+    //#encodeResponseWith
+  }
+
+  @Test
+  public void testDecodeRequest() {
+    //#decodeRequest
+    final ByteString helloGzipped = Coder.Gzip.encode(ByteString.fromString("Hello"));
+    final ByteString helloDeflated = Coder.Deflate.encode(ByteString.fromString("Hello"));
+
+    final Route route = decodeRequest(() ->
+      entity(entityToString(), content ->
+        complete("Request content: '" + content + "'")
+      )
+    );
+
+    // tests:
+    testRoute(route).run(
+      HttpRequest.POST("/").withEntity(helloGzipped)
+        .addHeader(ContentEncoding.create(HttpEncodings.GZIP)))
+      .assertEntity("Request content: 'Hello'");
+
+    testRoute(route).run(
+      HttpRequest.POST("/").withEntity(helloDeflated)
+        .addHeader(ContentEncoding.create(HttpEncodings.DEFLATE)))
+      .assertEntity("Request content: 'Hello'");
+
+    testRoute(route).run(
+      HttpRequest.POST("/").withEntity("hello uncompressed")
+        .addHeader(ContentEncoding.create(HttpEncodings.IDENTITY)))
+      .assertEntity( "Request content: 'hello uncompressed'");
+    //#decodeRequest
+  }
+
+  @Test
+  public void testDecodeRequestWith() {
+    //#decodeRequestWith
+    final ByteString helloGzipped = Coder.Gzip.encode(ByteString.fromString("Hello"));
+    final ByteString helloDeflated = Coder.Deflate.encode(ByteString.fromString("Hello"));
+
+    final Route route = decodeRequestWith(Coder.Gzip, () ->
+      entity(entityToString(), content ->
+        complete("Request content: '" + content + "'")
+      )
+    );
+
+    // tests:
+    testRoute(route).run(
+      HttpRequest.POST("/").withEntity(helloGzipped)
+        .addHeader(ContentEncoding.create(HttpEncodings.GZIP)))
+      .assertEntity("Request content: 'Hello'");
+
+    runRouteUnSealed(route,
+      HttpRequest.POST("/").withEntity(helloDeflated)
+        .addHeader(ContentEncoding.create(HttpEncodings.DEFLATE)))
+      .assertRejections(Rejections.unsupportedRequestEncoding(HttpEncodings.GZIP));
+
+    runRouteUnSealed(route,
+      HttpRequest.POST("/").withEntity("hello")
+        .addHeader(ContentEncoding.create(HttpEncodings.IDENTITY)))
+      .assertRejections(Rejections.unsupportedRequestEncoding(HttpEncodings.GZIP));
+    //#decodeRequestWith
+  }
+
+}

akka-docs/rst/java/http/routing-dsl/directives/coding-directives/decodeRequest.rst

@@ -10,4 +10,5 @@ Decompresses the incoming request if it is ``gzip`` or ``deflate`` compressed. U
 
 Example
 -------
-..TODO: Example snippets for JavaDSL are subject to community contributions! Help us complete the docs, read more about it here: `write example snippets for Akka HTTP Java DSL #20466 <https://github.com/akka/akka/issues/20466>`_.
+
+.. includecode:: ../../../../code/docs/http/javadsl/server/directives/CodingDirectivesExamplesTest.java#decodeRequest

akka-docs/rst/java/http/routing-dsl/directives/coding-directives/decodeRequestWith.rst

@@ -10,4 +10,5 @@ Decodes the incoming request if it is encoded with one of the given encoders. If
 
 Example
 -------
-TODO: Example snippets for JavaDSL are subject to community contributions! Help us complete the docs, read more about it here: `write example snippets for Akka HTTP Java DSL #20466 <https://github.com/akka/akka/issues/20466>`_.
+
+.. includecode:: ../../../../code/docs/http/javadsl/server/directives/CodingDirectivesExamplesTest.java#decodeRequestWith

akka-docs/rst/java/http/routing-dsl/directives/coding-directives/encodeResponse.rst

@@ -14,6 +14,7 @@ If the ``Accept-Encoding`` header is missing or empty or specifies an encoding o
 
 Example
 -------
-TODO: Example snippets for JavaDSL are subject to community contributions! Help us complete the docs, read more about it here: `write example snippets for Akka HTTP Java DSL #20466 <https://github.com/akka/akka/issues/20466>`_.
+
+.. includecode:: ../../../../code/docs/http/javadsl/server/directives/CodingDirectivesExamplesTest.java#encodeResponse
 
 .. _RFC7231: http://tools.ietf.org/html/rfc7231#section-5.3.4

akka-docs/rst/java/http/routing-dsl/directives/coding-directives/encodeResponseWith.rst

@@ -17,6 +17,7 @@ response encoding is used. Otherwise the request is rejected.
 
 Example
 -------
-TODO: Example snippets for JavaDSL are subject to community contributions! Help us complete the docs, read more about it here: `write example snippets for Akka HTTP Java DSL #20466 <https://github.com/akka/akka/issues/20466>`_.
+
+.. includecode:: ../../../../code/docs/http/javadsl/server/directives/CodingDirectivesExamplesTest.java#encodeResponseWith
 
 .. _RFC7231: http://tools.ietf.org/html/rfc7231#section-5.3.4

akka-docs/rst/java/http/routing-dsl/directives/coding-directives/responseEncodingAccepted.rst

@@ -10,4 +10,5 @@ Passes the request to the inner route if the request accepts the argument encodi
 
 Example
 -------
-TODO: Example snippets for JavaDSL are subject to community contributions! Help us complete the docs, read more about it here: `write example snippets for Akka HTTP Java DSL #20466 <https://github.com/akka/akka/issues/20466>`_.
+
+.. includecode:: ../../../../code/docs/http/javadsl/server/directives/CodingDirectivesExamplesTest.java#responseEncodingAccepted