From 4d40253f1cbb261aa469411a3c2a7ffc2ef761a4 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Tue, 7 Jul 2020 13:53:20 -0400
Subject: Tests: Cover file(GENERATE) using 'foo.tmp' as input for output 'foo'

Fixes: #20873
---
 Tests/RunCMake/File_Generate/AdjacentInOut.cmake | 6 ++++++
 Tests/RunCMake/File_Generate/AdjacentInOut.in    | 1 +
 Tests/RunCMake/File_Generate/RunCMakeTest.cmake  | 8 ++++++++
 3 files changed, 15 insertions(+)
 create mode 100644 Tests/RunCMake/File_Generate/AdjacentInOut.cmake
 create mode 100644 Tests/RunCMake/File_Generate/AdjacentInOut.in

diff --git a/Tests/RunCMake/File_Generate/AdjacentInOut.cmake b/Tests/RunCMake/File_Generate/AdjacentInOut.cmake
new file mode 100644
index 0000000..828c2ee
--- /dev/null
+++ b/Tests/RunCMake/File_Generate/AdjacentInOut.cmake
@@ -0,0 +1,6 @@
+cmake_policy(SET CMP0070 NEW)
+if(EXISTS "${CMAKE_CURRENT_BINARY_DIR}/AdjacentInOut.txt")
+  message(FATAL_ERROR "CMake should not re-run during the build!")
+endif()
+configure_file(AdjacentInOut.in ${CMAKE_CURRENT_BINARY_DIR}/AdjacentInOut.txt.tmp)
+file(GENERATE OUTPUT AdjacentInOut.txt INPUT ${CMAKE_CURRENT_BINARY_DIR}/AdjacentInOut.txt.tmp)
diff --git a/Tests/RunCMake/File_Generate/AdjacentInOut.in b/Tests/RunCMake/File_Generate/AdjacentInOut.in
new file mode 100644
index 0000000..bfbbda7
--- /dev/null
+++ b/Tests/RunCMake/File_Generate/AdjacentInOut.in
@@ -0,0 +1 @@
+Sample Text File
diff --git a/Tests/RunCMake/File_Generate/RunCMakeTest.cmake b/Tests/RunCMake/File_Generate/RunCMakeTest.cmake
index 94aaca8..5987417 100644
--- a/Tests/RunCMake/File_Generate/RunCMakeTest.cmake
+++ b/Tests/RunCMake/File_Generate/RunCMakeTest.cmake
@@ -72,6 +72,7 @@ if (UNIX AND EXISTS /bin/sh)
   if (NOT script_output STREQUAL SUCCESS)
     message(SEND_ERROR "Generated script did not execute correctly:\n${script_output}\n====\n${script_error}")
   endif()
+  unset(RunCMake_TEST_NO_CLEAN)
 endif()
 
 if (RunCMake_GENERATOR MATCHES Makefiles)
@@ -104,3 +105,10 @@ if (RunCMake_GENERATOR MATCHES Makefiles)
     message(SEND_ERROR "File did not re-generate: \"${RunCMake_BINARY_DIR}/ReRunCMake-build/output_file.txt\"")
   endif()
 endif()
+
+set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/AdjacentInOut-build)
+run_cmake(AdjacentInOut)
+set(RunCMake_TEST_NO_CLEAN 1)
+run_cmake_command(AdjacentInOut-nowork ${CMAKE_COMMAND} --build .)
+unset(RunCMake_TEST_BINARY_DIR)
+unset(RunCMake_TEST_NO_CLEAN)
-- 
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