ExternalData: Add tests covering interfaces and errors

Add a Module.ExternalData test to verify data retrieval and test
argument DATA{} references.

Add a RunCMake.ExternalData test to verify error handling and automatic
transformation of a raw data to a content link and staged object.

1 files changed, 12 insertions, 0 deletions

diff --git a/Tests/RunCMake/ExternalData/NotUnderRoot-stderr.txt b/Tests/RunCMake/ExternalData/NotUnderRoot-stderr.txt
new file mode 100644
index 0000000..1f2eb1c
--- /dev/null
+++ b/Tests/RunCMake/ExternalData/NotUnderRoot-stderr.txt
@@ -0,0 +1,12 @@
+CMake Error at .*/Modules/ExternalData.cmake:[0-9]+ \(message\):
+  Data file referenced by argument
+
+    DATA{../NotUnderRoot.txt}
+
+  does not lie under the top-level source directory
+
+    .*/Tests/RunCMake/ExternalData
+
+Call Stack \(most recent call first\):
+  .*
+  NotUnderRoot.cmake:2 \(ExternalData_Add_Test\)