Rust: Add Testing cross-content entry.

.doc_gen/cross-content/testing_Rust_block.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "file://zonbook/docbookx.dtd" [
+  <!ENTITY % phrases-shared SYSTEM "file://AWSShared/common/phrases-shared.ent">
+  %phrases-shared;
+]>
+<block>
+  <para>There are several ways to perform unit and integration testing using &Rustlong;. For complete source code and instructions on how to set up and run testing, see the full set of examples on <ulink url="https://github.com/awsdocs/aws-doc-sdk-examples/blob/main/rust_dev_preview/examples/testing">GitHub</ulink>.</para>
+</block>

.doc_gen/metadata/cross_metadata.yaml

@@ -694,3 +694,23 @@ cross_ResilientService:
       DescribeLoadBalancers, CreateTargetGroup, DescribeTargetGroups, DeleteTargetGroup,
       CreateLoadBalancer, CreateListener, DeleteLoadBalancer, DescribeTargetHealth}
     iam: {CreateInstanceProfile, DeleteInstanceProfile}
+cross_Testing:
+  title: Example approaches for unit and integration testing an &AWS; SDK.
+  title_abbrev: Unit and integration test with an SDK
+  synopsis: examples for best-practice techniques when writing unit and integration tests using an &AWS; SDK.
+  languages:
+    Rust:
+      versions:
+        - sdk_version: 1
+          github: rust_dev_preview/examples/testing
+          block_content: testing_Rust_block.xml
+          # excerpts:
+          #   - description: Cargo.toml for testing examples
+          #     snippet_files:
+          #       - rust_dev_preview/examples/testing/Cargo.toml
+          #   - description: Unit testing example using automock and a service wrapper.
+          #     snippet_files:
+          #       - rust_dev_preview/examples/testing/src/wrapper.rs
+          #   - description: Integration testing example using StaticReplayClient.
+          #     snippet_files:
+          #       - rust_dev_preview/examples/testing/src/replay.rs