if: Add "TEST <test>" condition

if(TEST TestNameThatExists) will return true if a test with the name
TestNameThatExists has been added with add_test.  The syntax is similar
to if(TARGET TargetName).  Since use of "TEST" as an argument to if()
could previously be interpreted as a non-keyword argument, add policy
CMP0064 to treat it as a keyword as NEW behavior.

1 files changed, 17 insertions, 0 deletions

diff --git a/Help/policy/CMP0064.rst b/Help/policy/CMP0064.rst
new file mode 100644
index 0000000..e9a061b
--- /dev/null
+++ b/Help/policy/CMP0064.rst
@@ -0,0 +1,17 @@
+CMP0064
+-------
+
+Recognize ``TEST`` as a operator for the :command:`if` command.
+
+The ``TEST`` operator was added to the :command:`if` command to determine if a
+given test name was created by the :command:`add_test` command.
+
+The ``OLD`` behavior for this policy is to ignore the ``TEST`` operator.
+The ``NEW`` behavior is to interpret the ``TEST`` operator.
+
+This policy was introduced in CMake version 3.4.  CMake version
+|release| warns when the policy is not set and uses ``OLD`` behavior.  Use
+the :command:`cmake_policy()` command to set it to ``OLD`` or ``NEW``
+explicitly.
+
+.. include:: DEPRECATED.txt