Tests: Add a simple test for the LibACPI AML Interpreter

The test .aml file was built with iASL 20260930, using
`iasl Tests/LibACPI/test-inputs/scope_and_name.dsl`

Meta/Lagom/CMakeLists.txt

@@ -691,6 +691,7 @@ if (BUILD_LAGOM)
         set(TEST_DIRECTORIES
             AK
             Kernel/POSIX
+            LibACPI
             LibCompress
             LibCrypto
             LibDisassembly

Tests/CMakeLists.txt

@@ -1,5 +1,6 @@
 add_subdirectory(AK)
 add_subdirectory(Kernel)
+add_subdirectory(LibACPI)
 add_subdirectory(LibAudio)
 add_subdirectory(LibC)
 add_subdirectory(LibCompress)

Tests/LibACPI/CMakeLists.txt

@@ -0,0 +1,9 @@
+set(TEST_SOURCES
+    TestAML.cpp
+)
+
+foreach(source IN LISTS TEST_SOURCES)
+    serenity_test("${source}" LibACPI LIBS LibACPI)
+endforeach()
+
+install(DIRECTORY test-inputs DESTINATION usr/Tests/LibACPI)

Tests/LibACPI/TestAML.cpp

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2026, Undefine <[email protected]>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibACPI/Interpreter.h>
+#include <LibACPI/NameString.h>
+#include <LibCore/MappedFile.h>
+#include <LibTest/Macros.h>
+#include <LibTest/TestCase.h>
+
+#ifdef AK_OS_SERENITY
+#    define TEST_INPUT(x) ("/usr/Tests/LibACPI/test-inputs/" x)
+#else
+#    define TEST_INPUT(x) ("test-inputs/" x)
+#endif
+
+TEST_CASE(scope_and_name)
+{
+    auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("scope_and_name.aml"sv)));
+
+    auto interpreter = TRY_OR_FAIL(ACPI::AML::Interpreter::create());
+    TRY_OR_FAIL(interpreter->load(file->bytes()));
+
+    auto num1 = TRY_OR_FAIL(interpreter->evaluate(TRY_OR_FAIL(ACPI::AML::NameString::from_string_view("\\_SB_.NUM1"sv))));
+    EXPECT(num1.is<u64>());
+    EXPECT_EQ(MUST(num1.as<u64>()), 0x1234ul);
+
+    auto num2 = TRY_OR_FAIL(interpreter->evaluate(TRY_OR_FAIL(ACPI::AML::NameString::from_string_view("\\_SB_.NUM2"sv))));
+    EXPECT(num2.is<u64>());
+    EXPECT_EQ(MUST(num2.as<u64>()), 42ul);
+}

Tests/LibACPI/test-inputs/scope_and_name.asl

@@ -0,0 +1,8 @@
+DefinitionBlock ("", "DSDT", 2, "BUGGIE", "SERENITY", 0x00000001)
+{
+    Scope (\_SB)
+    {
+        Name (NUM1, 0x1234)
+        Name (NUM2, 42)
+    }
+}