Add test for requires_arguments()

Author: aedart

tests/unit/helpers/requires_arguments_test.cmake

@@ -0,0 +1,40 @@
+include("rsp/testing")
+include("rsp/helpers")
+
+define_test_case(
+    "Requires Arguments Test"
+    LABELS "requires;args;helpers"
+)
+
+# -------------------------------------------------------------------------------------------------------------- #
+# Helpers
+# -------------------------------------------------------------------------------------------------------------- #
+
+function(fn_with_required_args)
+    set(options "") # N/A
+    set(oneValueArgs NAME DESCRIPTION)
+    set(multiValueArgs "") # N/A
+
+    cmake_parse_arguments(INPUT "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
+    requires_arguments(INPUT "NAME;DESCRIPTION")
+endfunction()
+
+# -------------------------------------------------------------------------------------------------------------- #
+# Actual Tests
+# -------------------------------------------------------------------------------------------------------------- #
+
+define_test("ensures required args are defined" "ensures_required_args_defined")
+function(ensures_required_args_defined)
+
+    # If invoking method does not cause a fatal error, test passes.
+    fn_with_required_args(NAME "foo" DESCRIPTION "bar")
+
+endfunction()
+
+define_test("fails when required args are not defined" "fails_when_required_arg_not_defined" EXPECT_FAILURE)
+function(fails_when_required_arg_not_defined)
+
+    # This should cause a failure because DESCRIPTION is required
+    fn_with_required_args(NAME "foo")
+
+endfunction()