Update unittest_doc.md with analysistest and loadingtest modules (#370)
Co-authored-by: Alexandre Rostovtsev <arostovtsev@google.com>
diff --git a/docs/unittest_doc.md b/docs/unittest_doc.md
index facd55f..a8e4a5a 100755
--- a/docs/unittest_doc.md
+++ b/docs/unittest_doc.md
@@ -2,9 +2,18 @@
Unit testing support.
-Unlike most Skylib files, this exports two modules: `unittest` which contains
-functions to declare and define unit tests, and `asserts` which contains the
-assertions used to within tests.
+Unlike most Skylib files, this exports four modules:
+* `unittest` contains functions to declare and define unit tests for ordinary
+ Starlark functions;
+* `analysistest` contains functions to declare and define tests for analysis
+ phase behavior of a rule, such as a given target's providers or registered
+ actions;
+* `loadingtest` contains functions to declare and define tests for loading
+ phase behavior, such as macros and `native.*`;
+* `asserts` contains the assertions used within tests.
+
+See https://bazel.build/extending/concepts for background about macros, rules,
+and the different phases of a build.
<a id="#unittest_toolchain"></a>
diff --git a/lib/unittest.bzl b/lib/unittest.bzl
index badb462..4398f16 100644
--- a/lib/unittest.bzl
+++ b/lib/unittest.bzl
@@ -14,9 +14,18 @@
"""Unit testing support.
-Unlike most Skylib files, this exports two modules: `unittest` which contains
-functions to declare and define unit tests, and `asserts` which contains the
-assertions used to within tests.
+Unlike most Skylib files, this exports four modules:
+* `unittest` contains functions to declare and define unit tests for ordinary
+ Starlark functions;
+* `analysistest` contains functions to declare and define tests for analysis
+ phase behavior of a rule, such as a given target's providers or registered
+ actions;
+* `loadingtest` contains functions to declare and define tests for loading
+ phase behavior, such as macros and `native.*`;
+* `asserts` contains the assertions used within tests.
+
+See https://bazel.build/extending/concepts for background about macros, rules,
+and the different phases of a build.
"""
load(":new_sets.bzl", new_sets = "sets")
