set up

src/SUMMARY.md

@@ -56,10 +56,12 @@
     - [`std::path`]()
     - [`std::env`]()
 
-- [Testing]()
-    - [Unit Tests]()
-    - [Integration Tests]()
-    - [Test Attribute]()
+- [Testing](chXX-00-testing.md)
+    - [Unit testing](chXX-01-testing.md)
+    - [Integration testing](chXX-02-integration-testing.md)
+    - [Documentation Tests](chXX-03-documentation-tests.md)
+
+- [Debugging]()
 
 ## Thinking in Rust
 

src/chXX-00-testing.md

@@ -0,0 +1 @@
+# Testing

src/chXX-01-testing.md

@@ -0,0 +1 @@
+# Unit testing

src/chXX-02-integration-testing.md

@@ -0,0 +1 @@
+# Integration testing

src/chXX-03-documentation-tests.md

@@ -0,0 +1 @@
+# Documentation Tests