testing that cmake_paths functionality is covered by CMakeToolchain (#9538)

* testing that cmake_paths functionality is covered by CMakeToolchain

* add real helloConfig.cmake test

* checking CMakeDeps has priority

4 files changed, 137 insertions, 3 deletions

diff --git a/conans/test/functional/toolchains/cmake/test_cmakedeps_custom_configs.py b/conans/test/functional/toolchains/cmake/cmakedeps/test_cmakedeps_custom_configs.py
index 7ea78608..7ea78608 100644
--- a/conans/test/functional/toolchains/cmake/test_cmakedeps_custom_configs.py
+++ b/conans/test/functional/toolchains/cmake/cmakedeps/test_cmakedeps_custom_configs.py
diff --git a/conans/test/functional/toolchains/cmake/cmakedeps/test_cmakedeps_find_module_and_config.py b/conans/test/functional/toolchains/cmake/cmakedeps/test_cmakedeps_find_module_and_config.py
index 6afdf5b3..f2e71ec6 100644
--- a/conans/test/functional/toolchains/cmake/cmakedeps/test_cmakedeps_find_module_and_config.py
+++ b/conans/test/functional/toolchains/cmake/cmakedeps/test_cmakedeps_find_module_and_config.py
@@ -48,11 +48,14 @@ def client():
 
                 self.cpp_info.set_property("cmake_module_file_name", "mi_dependencia")
                 self.cpp_info.set_property("cmake_module_target_name", "mi_dependencia_target")
-                self.cpp_info.set_property("cmake_module_target_namespace", "mi_dependencia_namespace")
+                self.cpp_info.set_property("cmake_module_target_namespace",
+                                           "mi_dependencia_namespace")
 
                 self.cpp_info.components["crispin"].libs = ["mydep"]
-                self.cpp_info.components["crispin"].set_property("cmake_target_name", "MyCrispinTarget")
-                self.cpp_info.components["crispin"].set_property("cmake_module_target_name", "mi_crispin_target")
+                self.cpp_info.components["crispin"].set_property("cmake_target_name",
+                                                                 "MyCrispinTarget")
+                self.cpp_info.components["crispin"].set_property("cmake_module_target_name",
+                                                                 "mi_crispin_target")
         """)
 
     t.save({"conanfile.py": conanfile,
diff --git a/conans/test/functional/toolchains/test_cmake_toolchain.py b/conans/test/functional/toolchains/cmake/test_cmake_toolchain.py
index f5b29b16..f5b29b16 100644
--- a/conans/test/functional/toolchains/test_cmake_toolchain.py
+++ b/conans/test/functional/toolchains/cmake/test_cmake_toolchain.py
diff --git a/conans/test/functional/toolchains/cmake/test_cmaketoolchain_paths.py b/conans/test/functional/toolchains/cmake/test_cmaketoolchain_paths.py
new file mode 100644
index 00000000..c8f6522e
--- /dev/null
+++ b/conans/test/functional/toolchains/cmake/test_cmaketoolchain_paths.py
@@ -0,0 +1,131 @@
+import textwrap
+
+import pytest
+
+from conans.test.utils.tools import TestClient
+
+
+@pytest.mark.tool_cmake
+@pytest.mark.parametrize("package", ["hello", "ZLIB"])
+@pytest.mark.parametrize("find_package", ["module", "config"])
+def test_cmaketoolchain_path_find(package, find_package):
+    """Test with user "Hello" and also ZLIB one, to check that package ZLIB
+    has priority over the CMake system one
+
+    Also, that user cmake files in the root are accessible via CMake include()
+    """
+    client = TestClient()
+    conanfile = textwrap.dedent("""
+        from conans import ConanFile
+        class TestConan(ConanFile):
+            exports = "*"
+            def layout(self):
+                pass
+            def package(self):
+                self.copy(pattern="*", keep_path=False)
+        """)
+    find = textwrap.dedent("""
+        SET({package}_FOUND 1)
+        MESSAGE("HELLO FROM THE {package} FIND PACKAGE!")
+        """).format(package=package)
+    myowncmake = textwrap.dedent("""
+        MESSAGE("MYOWNCMAKE FROM {package}!")
+        """).format(package=package)
+
+    filename = "{}Config.cmake" if find_package == "config" else "Find{}.cmake"
+    filename = filename.format(package)
+    client.save({"conanfile.py": conanfile,
+                 "{}".format(filename): find,
+                 "myowncmake.cmake": myowncmake})
+    client.run("create . {}/0.1@".format(package))
+
+    consumer = textwrap.dedent("""
+        set(CMAKE_CXX_COMPILER_WORKS 1)
+        set(CMAKE_CXX_ABI_COMPILED 1)
+        project(MyHello CXX)
+        cmake_minimum_required(VERSION 3.15)
+
+        find_package({package} REQUIRED)
+        include(myowncmake)
+        """).format(package=package)
+
+    client.save({"CMakeLists.txt": consumer}, clean_first=True)
+    client.run("install {}/0.1@ -g CMakeToolchain".format(package))
+    with client.chdir("build"):
+        client.run_command("cmake .. -DCMAKE_TOOLCHAIN_FILE=../conan_toolchain.cmake")
+    assert "Conan: Target declared" not in client.out
+    assert "HELLO FROM THE {package} FIND PACKAGE!".format(package=package) in client.out
+    assert "MYOWNCMAKE FROM {package}!".format(package=package) in client.out
+
+    # If using the CMakeDeps generator, the in-package .cmake will be ignored
+    # But it is still possible to include(owncmake)
+    client.run("install {}/0.1@ -g CMakeToolchain -g CMakeDeps".format(package))
+    with client.chdir("build2"):  # A clean folder, not the previous one, CMake cache doesnt affect
+        client.run_command("cmake .. -DCMAKE_TOOLCHAIN_FILE=../conan_toolchain.cmake")
+    assert "Conan: Target declared '{package}::{package}'".format(package=package) in client.out
+    assert "HELLO FROM THE {package} FIND PACKAGE!".format(package=package) not in client.out
+    assert "MYOWNCMAKE FROM {package}!".format(package=package) in client.out
+
+
+@pytest.mark.tool_cmake
+def test_cmaketoolchain_path_find_real_config():
+    client = TestClient()
+    conanfile = textwrap.dedent("""
+        from conans import ConanFile
+        from conan.tools.cmake import CMake
+        class TestConan(ConanFile):
+            settings = "os", "compiler", "build_type", "arch"
+            exports = "*"
+            generators = "CMakeToolchain"
+
+            def layout(self):
+                pass
+
+            def build(self):
+                cmake = CMake(self)
+                cmake.configure()
+
+            def package(self):
+                cmake = CMake(self)
+                cmake.install()
+        """)
+    cmake = textwrap.dedent("""
+        cmake_minimum_required(VERSION 3.15)
+        project(MyHello NONE)
+
+        add_library(hello INTERFACE)
+        install(TARGETS hello EXPORT helloConfig)
+        export(TARGETS hello
+            NAMESPACE hello::
+            FILE "${CMAKE_CURRENT_BINARY_DIR}/helloConfig.cmake"
+        )
+        install(EXPORT helloConfig
+            DESTINATION "${CMAKE_INSTALL_PREFIX}/hello/cmake"
+            NAMESPACE hello::
+        )
+        """)
+    client.save({"conanfile.py": conanfile,
+                 "CMakeLists.txt": cmake})
+    client.run("create . hello/0.1@")
+
+    consumer = textwrap.dedent("""
+        project(MyHello NONE)
+        cmake_minimum_required(VERSION 3.15)
+
+        find_package(hello REQUIRED)
+        """)
+
+    client.save({"CMakeLists.txt": consumer}, clean_first=True)
+    client.run("install hello/0.1@ -g CMakeToolchain")
+    with client.chdir("build"):
+        client.run_command("cmake .. -DCMAKE_TOOLCHAIN_FILE=../conan_toolchain.cmake")
+    # If it didn't fail, it found the helloConfig.cmake
+    assert "Conan: Target declared" not in client.out
+
+    # If using the CMakeDeps generator, the in-package .cmake will be ignored
+    # But it is still possible to include(owncmake)
+    client.run("install hello/0.1@ -g CMakeToolchain -g CMakeDeps")
+    with client.chdir("build2"):  # A clean folder, not the previous one, CMake cache doesnt affect
+        client.run_command("cmake .. -DCMAKE_TOOLCHAIN_FILE=../conan_toolchain.cmake")
+    assert "Conan: Target declared 'hello::hello'" in client.out
+