Fix issues with self.generator_info (conan-io#18503)

* Failing tests

* Make second one fail too

* Fixes

* Discard changes to conan/internal/model/conan_file.py

* Update test/integration/generators/test_generators_from_br.py

* Update test/integration/generators/test_generators_from_br.py

* Fix tests

Author: AbrilRBS

conan/internal/api/install/generators.py

@@ -168,7 +168,8 @@ def _receive_generators(conanfile):
             names = [c.__name__ if not isinstance(c, str) else c for c in build_req.generator_info]
             conanfile.output.warning(f"Tool-require {build_req} adding generators: {names}",
                                      warn_tag="experimental")
-            conanfile.generators = build_req.generator_info + conanfile.generators
+            # Generators can be defined as a tuple in recipes, ensure we don't break if so
+            conanfile.generators = build_req.generator_info + list(conanfile.generators)
 
 
 def _generate_aggregated_env(conanfile):

test/integration/generators/test_generators_from_br.py

@@ -1,7 +1,7 @@
 import json
 import textwrap
 
-from conan.test.utils.tools import TestClient
+from conan.test.utils.tools import GenConanfile, TestClient
 
 
 def test_inject_generators_conf():
@@ -24,12 +24,18 @@ def package_info(self):
                 self.generator_info = ["CMakeToolchain", MyGenerator]
         """)})
 
+    tc.save({"consumer/conanfile.py": GenConanfile("consumer", "0.1")
+                .with_tool_requires("tool/0.1")
+                .with_class_attribute("generators = 'VirtualBuildEnv', 'VirtualRunEnv'")})
+
     tc.run("create tool")
-    tc.run("install --tool-requires=tool/0.1")
+    tc.run("create consumer")
     assert "WARN: experimental: Tool-require tool/0.1 adding generators: " \
            "['CMakeToolchain', 'MyGenerator']" in tc.out
     assert "Generator 'CMakeToolchain' calling 'generate()'" in tc.out
     assert "Generator 'MyGenerator' calling 'generate()'" in tc.out
+    assert "Generator 'VirtualBuildEnv' calling 'generate()'" in tc.out
+    assert "Generator 'VirtualRunEnv' calling 'generate()'" in tc.out
     assert "CMakeToolchain generated: conan_toolchain.cmake" in tc.out
     assert "MyGenerator generated" in tc.out