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, 14 insertions, 0 deletions

diff --git a/Tests/RunCMake/ExternalData/MissingData-stderr.txt b/Tests/RunCMake/ExternalData/MissingData-stderr.txt
new file mode 100644
index 0000000..e794f95
--- /dev/null
+++ b/Tests/RunCMake/ExternalData/MissingData-stderr.txt
@@ -0,0 +1,14 @@
+CMake Error at .*/Modules/ExternalData.cmake:[0-9]+ \(message\):
+  Data file referenced by argument
+
+    DATA{MissingData.txt}
+
+  corresponds to source tree path
+
+    MissingData.txt
+
+  that does not exist as a file \(with or without an extension\)!
+Call Stack \(most recent call first\):
+  .*
+  MissingData.cmake:2 \(ExternalData_Add_Test\)
+  CMakeLists.txt:3 \(include\)