Tests: Add test for install(DIRECTORY) with PATTERN and REGEX

Tests/RunCMake/install/DIRECTORY-PATTERN-all-check.cmake

@@ -0,0 +1 @@
+check_installed([[^dir1;dir1/empty\.c;dir1/empty\.h;dir2;dir2/pattern;dir2/pattern/empty\.txt;dir3;dir3/empty\.c;dir3/empty\.h;dir3/empty\.txt;dir4;dir4/empty\.c;dir4/empty\.h;dir4/empty\.txt;empty$]])

Tests/RunCMake/install/DIRECTORY-PATTERN.cmake

@@ -0,0 +1,36 @@
+install(
+  DIRECTORY pattern/
+  DESTINATION dir1
+  FILES_MATCHING
+  PATTERN "*.h"
+  REGEX "\\.c$"
+  )
+
+# FIXME: If/when CMake gains a good way to read file permissions, we should
+# check that these permissions were set correctly.
+install(
+  DIRECTORY pattern
+  DESTINATION dir2
+  FILE_PERMISSIONS OWNER_READ OWNER_WRITE
+  DIRECTORY_PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE
+  PATTERN "*.h" EXCLUDE
+  REGEX "\\.c$" EXCLUDE
+  )
+
+install(
+  DIRECTORY pattern/
+  DESTINATION dir3
+  PATTERN "*.h"
+  PERMISSIONS OWNER_READ OWNER_WRITE
+  )
+
+install(
+  DIRECTORY pattern/
+  DESTINATION dir4
+  USE_SOURCE_PERMISSIONS
+  )
+
+install(
+  DIRECTORY
+  DESTINATION empty
+  )

Tests/RunCMake/install/RunCMakeTest.cmake

@@ -85,6 +85,7 @@ run_install_test(Deprecated)
 run_install_test(PRE_POST_INSTALL_SCRIPT)
 run_install_test(SCRIPT)
 run_install_test(TARGETS-CONFIGURATIONS)
+run_install_test(DIRECTORY-PATTERN)
 
 set(run_install_test_components 1)
 run_install_test(FILES-EXCLUDE_FROM_ALL)