t1007-hash-objects: 5GiB file (size_t) LLP64 test case

Add a 'clean' filtered LLP64 big file test case to the has-object
test cases. The object is not written to the object store.

A simple 'nullfilter' is used, and was tested for failure with
filter.nullfilter.clean "echo wrong && cat".

The `big` file from the previous tests is reused, to save setup time,
though the generation code is retained as a comment line.

Signed-off-by: Philip Oakley <[email protected]>

Author: PhilipOakley

t/t1007-hash-object.sh

@@ -275,4 +275,16 @@ test_expect_success EXPENSIVE,SIZE_T_IS_64BIT,!LONG_IS_64BIT \
 	test_cmp expect actual
 '
 
+# This clean filter does nothing, other than excercising the interface.
+# We ensure that cleaning doesn't mangle large files on 64-bit Windows.
+test_expect_success EXPENSIVE,SIZE_T_IS_64BIT,!LONG_IS_64BIT \
+		'hash filtered files over 4GB on input' '
+	# test-tool genzeros $((5*1024*1024*1024)) >big &&
+	test_oid large5GB >expect &&
+	test_config filter.nullfilter.clean "cat" &&
+	echo "big filter=nullfilter" >.gitattributes &&
+	git hash-object -- big >actual &&
+	test_cmp expect actual
+'
+
 test_done