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# Writer side of the native Delta frame round-trip test. Generates a matrix,
# converts it to a frame, and materializes it as a Delta table (under test).
# The same matrix is also written as a plain text reference. Running the
# read/compare in a SEPARATE process prevents SystemDS from short-circuiting
# the subsequent read against the in-memory frame, so FrameReaderDelta is
# actually exercised.

X = rand(rows=$1, cols=$2, min=-5, max=5, seed=7, sparsity=$3)
F = as.frame(X)
write(F, $4, format="delta")
write(X, $5, format="text")
