Add pw_unit_test support to build configuration (project-chip#29479)

* Add pw_unit_test support to GN

* Rename old chip_test_suite template to chip_test_suite_using_nltest

It will be removed in the future, when it's no longer needed.

* Make new chip_test_suite template, using pw_test instead of chip_test

* Rename a few GN targets to be consistent with pigweed

Make them end with `.lib` or `.run` instead of `_lib` or `_run`.

* Reordered declarations in .gn for readability

* Update .gn

Author: mbknust

Diff for: .gn

@@ -31,4 +31,15 @@ default_args = {
 
   # GN target to use for the default Python build venv.
   pw_build_PYTHON_BUILD_VENV = "//:matter_build_venv"
+
+  # Required for pw_unit_test
+  pw_sys_io_BACKEND = "$dir_pw_sys_io_stdio"
+  pw_assert_BACKEND = "$dir_pw_assert_log"
+  pw_log_BACKEND = "$dir_pw_log_basic"
+
+  # TODO: Make sure only unit tests link against this
+  pw_build_LINK_DEPS = [
+    "$dir_pw_assert:impl",
+    "$dir_pw_log:impl",
+  ]
 }

Diff for: build/chip/chip_test.gni

@@ -38,11 +38,11 @@ if (chip_link_tests) {
       output_dir = _test_output_dir
     }
 
-    group(_test_name + "_lib") {
+    group(_test_name + ".lib") {
     }
 
     if (chip_pw_run_tests) {
-      pw_python_action(_test_name + "_run") {
+      pw_python_action(_test_name + ".run") {
         deps = [ ":${_test_name}" ]
         inputs = [ pw_unit_test_AUTOMATIC_RUNNER ]
         module = "pw_unit_test.test_runner"
@@ -64,7 +64,7 @@ if (chip_link_tests) {
   template("chip_test") {
     group(target_name) {
     }
-    group(target_name + "_lib") {
+    group(target_name + ".lib") {
     }
     not_needed(invoker, "*")
   }

Diff for: build/chip/chip_test_group.gni

@@ -31,7 +31,7 @@ template("chip_test_group") {
     _target_type = "group"
   }
 
-  _lib_target_name = "${_test_group_name}_lib"
+  _lib_target_name = "${_test_group_name}.lib"
 
   target(_target_type, _lib_target_name) {
     forward_variables_from(invoker,
@@ -43,7 +43,7 @@ template("chip_test_group") {
 
     deps = []
     foreach(_test, invoker.deps) {
-      deps += [ get_label_info(_test, "label_no_toolchain") + "_lib" ]
+      deps += [ get_label_info(_test, "label_no_toolchain") + ".lib" ]
     }
 
     if (_build_monolithic_library && chip_build_test_static_libraries) {

Diff for: build/chip/chip_test_suite.gni

@@ -85,7 +85,7 @@ template("chip_test_suite") {
   } else {
     _target_type = "source_set"
   }
-  target(_target_type, "${_suite_name}_lib") {
+  target(_target_type, "${_suite_name}.lib") {
     forward_variables_from(invoker, "*", [ "tests" ])
 
     output_dir = "${root_out_dir}/lib"
@@ -99,7 +99,104 @@ template("chip_test_suite") {
       public_deps += [ "${chip_root}/src/platform/logging:force_stdio" ]
     }
   }
+  if (chip_link_tests) {
+    tests = []
+
+    if (defined(invoker.test_sources)) {
+      foreach(_test, invoker.test_sources) {
+        _test_name = string_replace(_test, ".cpp", "")
+
+        pw_test(_test_name) {
+          forward_variables_from(invoker,
+                                 [
+                                   "deps",
+                                   "public_deps",
+                                   "cflags",
+                                   "configs",
+                                 ])
+          public_deps += [ ":${_suite_name}.lib" ]
+          sources = [ _test ]
+        }
+        tests += [ _test_name ]
+      }
+    }
+
+    if (defined(invoker.tests)) {
+      foreach(_test, invoker.tests) {
+        pw_test(_test) {
+          forward_variables_from(invoker,
+                                 [
+                                   "deps",
+                                   "public_deps",
+                                   "cflags",
+                                   "configs",
+                                 ])
+          public_deps += [ ":${_suite_name}.lib" ]
+          test_main = ""
+          sources = [
+            "${_test}.cpp",
+            "${_test}Driver.cpp",
+          ]
+        }
+        tests += [ _test ]
+      }
+    }
 
+    group(_suite_name) {
+      deps = []
+      foreach(_test, tests) {
+        deps += [ ":${_test}" ]
+      }
+    }
+
+    if (chip_pw_run_tests) {
+      group("${_suite_name}_run") {
+        deps = []
+        foreach(_test, tests) {
+          deps += [ ":${_test}.run" ]
+        }
+      }
+    }
+  } else {
+    group(_suite_name) {
+      deps = [ ":${_suite_name}.lib" ]
+    }
+  }
+}
+
+# TODO: remove this once transition away from nlunit-test is completed
+template("chip_test_suite_using_nltest") {
+  _suite_name = target_name
+
+  # Ensures that the common library has sources containing both common
+  # and individual unit tests.
+  if (!defined(invoker.sources)) {
+    invoker.sources = []
+  }
+
+  if (defined(invoker.test_sources)) {
+    invoker.sources += invoker.test_sources
+  }
+
+  if (chip_build_test_static_libraries) {
+    _target_type = "static_library"
+  } else {
+    _target_type = "source_set"
+  }
+  target(_target_type, "${_suite_name}.lib") {
+    forward_variables_from(invoker, "*", [ "tests" ])
+
+    output_dir = "${root_out_dir}/lib"
+
+    if (!defined(invoker.public_deps)) {
+      public_deps = []
+    }
+
+    if (current_os != "zephyr" && current_os != "mbed") {
+      # Depend on stdio logging, and have it take precedence over the default platform backend
+      public_deps += [ "${chip_root}/src/platform/logging:force_stdio" ]
+    }
+  }
   if (chip_link_tests) {
     tests = []
 
@@ -123,11 +220,10 @@ template("chip_test_suite") {
         chip_test(_test_name) {
           sources = [ _driver_name ]
           public_deps = [
-            ":${_suite_name}_lib",
+            ":${_suite_name}.lib",
             ":${_test_name}_generate_driver",
           ]
         }
-
         tests += [ _test_name ]
       }
     }
@@ -137,9 +233,8 @@ template("chip_test_suite") {
         chip_test(_test) {
           sources = [ "${_test}Driver.cpp" ]
 
-          public_deps = [ ":${_suite_name}_lib" ]
+          public_deps = [ ":${_suite_name}.lib" ]
         }
-
         tests += [ _test ]
       }
     }
@@ -155,13 +250,13 @@ template("chip_test_suite") {
       group("${_suite_name}_run") {
         deps = []
         foreach(_test, tests) {
-          deps += [ ":${_test}_run" ]
+          deps += [ ":${_test}.run" ]
         }
       }
     }
   } else {
     group(_suite_name) {
-      deps = [ ":${_suite_name}_lib" ]
+      deps = [ ":${_suite_name}.lib" ]
     }
   }
 }

Diff for: src/access/tests/BUILD.gn

@@ -18,7 +18,7 @@ import("//build_overrides/nlunit_test.gni")
 
 import("${chip_root}/build/chip/chip_test_suite.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libaccesstest"
 
   test_sources = [ "TestAccessControl.cpp" ]

Diff for: src/app/tests/BUILD.gn

@@ -117,7 +117,7 @@ source_set("operational-state-test-srcs") {
   ]
 }
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libAppTests"
 
   test_sources = [

Diff for: src/ble/tests/BUILD.gn

@@ -18,7 +18,7 @@ import("//build_overrides/nlunit_test.gni")
 
 import("${chip_root}/build/chip/chip_test_suite.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libBleLayerTests"
 
   test_sources = [

Diff for: src/controller/tests/BUILD.gn

@@ -18,7 +18,7 @@ import("//build_overrides/nlunit_test.gni")
 
 import("${chip_root}/build/chip/chip_test_suite.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libControllerTests"
 
   test_sources = [ "TestCommissionableNodeController.cpp" ]

Diff for: src/controller/tests/data_model/BUILD.gn

@@ -19,7 +19,7 @@ import("//build_overrides/nlunit_test.gni")
 import("${chip_root}/build/chip/chip_test_suite.gni")
 import("${chip_root}/src/platform/device.gni")
 
-chip_test_suite("data_model") {
+chip_test_suite_using_nltest("data_model") {
   output_name = "libDataModelTests"
 
   if (chip_device_platform != "mbed" && chip_device_platform != "efr32" &&

Diff for: src/credentials/tests/BUILD.gn

@@ -42,7 +42,7 @@ static_library("cert_test_vectors") {
   ]
 }
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libCredentialsTest"
   output_dir = "${root_out_dir}/lib"
 

Diff for: src/crypto/tests/BUILD.gn

@@ -19,7 +19,7 @@ import("//build_overrides/nlunit_test.gni")
 import("${chip_root}/build/chip/chip_test_suite.gni")
 import("${chip_root}/src/crypto/crypto.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libChipCryptoTests"
 
   sources = [

Diff for: src/inet/tests/BUILD.gn

@@ -60,7 +60,7 @@ static_library("helpers") {
   ]
 }
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libInetLayerTests"
 
   public_configs = [ ":tests_config" ]

Diff for: src/lib/address_resolve/tests/BUILD.gn

@@ -20,7 +20,7 @@ import("${chip_root}/src/lib/address_resolve/address_resolve.gni")
 
 import("${chip_root}/build/chip/chip_test_suite.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libAddressResolveTests"
 
   if (chip_address_resolve_strategy == "default") {

Diff for: src/lib/asn1/tests/BUILD.gn

@@ -18,7 +18,7 @@ import("//build_overrides/nlunit_test.gni")
 
 import("${chip_root}/build/chip/chip_test_suite.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libASN1Tests"
 
   test_sources = [ "TestASN1.cpp" ]

Diff for: src/lib/core/tests/BUILD.gn

@@ -19,7 +19,7 @@ import("//build_overrides/nlunit_test.gni")
 import("${chip_root}/build/chip/chip_test_suite.gni")
 import("${chip_root}/build/chip/fuzz_test.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libCoreTests"
 
   test_sources = [

Diff for: src/lib/dnssd/minimal_mdns/core/tests/BUILD.gn

@@ -27,7 +27,7 @@ source_set("support") {
   ]
 }
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libMinimalMdnsCoreTests"
 
   test_sources = [

Diff for: src/lib/dnssd/minimal_mdns/records/tests/BUILD.gn

@@ -18,7 +18,7 @@ import("//build_overrides/nlunit_test.gni")
 
 import("${chip_root}/build/chip/chip_test_suite.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libMinimalMdnsRecordsTests"
 
   test_sources = [

Diff for: src/lib/dnssd/minimal_mdns/responders/tests/BUILD.gn

@@ -18,7 +18,7 @@ import("//build_overrides/nlunit_test.gni")
 
 import("${chip_root}/build/chip/chip_test_suite.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libMinimalMdnsRespondersTests"
 
   test_sources = [

Diff for: src/lib/dnssd/minimal_mdns/tests/BUILD.gn

@@ -19,7 +19,7 @@ import("//build_overrides/nlunit_test.gni")
 import("${chip_root}/build/chip/chip_test_suite.gni")
 import("${chip_root}/build/chip/fuzz_test.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libMinimalMdnstests"
 
   test_sources = [

Diff for: src/lib/dnssd/platform/tests/BUILD.gn

@@ -18,7 +18,7 @@ import("//build_overrides/nlunit_test.gni")
 
 import("${chip_root}/build/chip/chip_test_suite.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libMdnsFakePlatformTests"
   if (chip_device_platform == "fake") {
     test_sources = [ "TestPlatform.cpp" ]

Diff for: src/lib/dnssd/tests/BUILD.gn

@@ -18,7 +18,7 @@ import("//build_overrides/nlunit_test.gni")
 
 import("${chip_root}/build/chip/chip_test_suite.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libMdnsTests"
 
   test_sources = [

Diff for: src/lib/format/tests/BUILD.gn

@@ -19,7 +19,7 @@ import("//build_overrides/nlunit_test.gni")
 import("${chip_root}/build/chip/chip_test_suite.gni")
 import("${chip_root}/build/chip/fuzz_test.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libFormatTests"
 
   test_sources = [

Diff for: src/lib/shell/tests/BUILD.gn

@@ -18,7 +18,7 @@ import("//build_overrides/nlunit_test.gni")
 
 import("${chip_root}/build/chip/chip_test_suite.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libTestShell"
 
   test_sources = [

Diff for: src/lib/support/tests/BUILD.gn

@@ -18,7 +18,7 @@ import("//build_overrides/nlunit_test.gni")
 
 import("${chip_root}/build/chip/chip_test_suite.gni")
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libSupportTests"
 
   test_sources = [

Diff for: src/messaging/tests/BUILD.gn

@@ -40,7 +40,7 @@ static_library("helpers") {
   ]
 }
 
-chip_test_suite("tests") {
+chip_test_suite_using_nltest("tests") {
   output_name = "libMessagingLayerTests"
 
   test_sources = []