update: add SPDX license identifier

See https://github.com/falcosecurity/evolution/issues/318

Signed-off-by: Leonardo Grasso <me@leonardograsso.com>

unit_tests/CMakeLists.txt

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: Apache-2.0
 #
 # Copyright (C) 2023 The Falco Authors.
 #

unit_tests/engine/test_falco_utils.cpp

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: Apache-2.0
 /*
 Copyright (C) 2023 The Falco Authors.
 

unit_tests/engine/test_filter_details_resolver.cpp

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: Apache-2.0
 /*
 Copyright (C) 2023 The Falco Authors.
 
@@ -46,4 +47,4 @@ TEST(DetailsResolver, resolve_ast)
     // Assert lists
     ASSERT_EQ(details.lists.size(), 1);
     ASSERT_NE(details.lists.find("known_procs"), details.lists.end());
-}
+}

unit_tests/engine/test_filter_macro_resolver.cpp

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: Apache-2.0
 /*
 Copyright (C) 2023 The Falco Authors.
 

unit_tests/engine/test_filter_warning_resolver.cpp

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: Apache-2.0
 /*
 Copyright (C) 2023 The Falco Authors.
 

unit_tests/engine/test_plugin_requirements.cpp

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: Apache-2.0
 /*
 Copyright (C) 2023 The Falco Authors.
 

unit_tests/engine/test_rulesets.cpp

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: Apache-2.0
 /*
 Copyright (C) 2023 The Falco Authors.
 

unit_tests/falco/app/actions/app_action_helpers.h

@@ -1,3 +1,19 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+Copyright (C) 2023 The Falco Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
 #pragma once
 #include <gtest/gtest.h>
 #include <falco/app/state.h>

unit_tests/falco/app/actions/test_configure_interesting_sets.cpp

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: Apache-2.0
 /*
 Copyright (C) 2023 The Falco Authors.
 

unit_tests/falco/app/actions/test_configure_syscall_buffer_num.cpp

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: Apache-2.0
 /*
 Copyright (C) 2023 The Falco Authors.
 

unit_tests/falco/app/actions/test_select_event_sources.cpp

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: Apache-2.0
 /*
 Copyright (C) 2023 The Falco Authors.
 

unit_tests/falco/test_atomic_signal_handler.cpp

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: Apache-2.0
 /*
 Copyright (C) 2023 The Falco Authors.
 
@@ -128,4 +129,4 @@ TEST(AtomicSignalHandler, handle_and_reset)
 	ASSERT_FALSE(handler.triggered());
 	ASSERT_FALSE(handler.handled());
 	ASSERT_FALSE(handler.handle(do_nothing));
-}
+}

unit_tests/falco/test_configuration.cpp

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: Apache-2.0
 /*
 Copyright (C) 2023 The Falco Authors.