1 files changed, 73 insertions, 0 deletions
diff --git a/t/t6115-rev-list-du.sh b/t/t6115-rev-list-du.sh
new file mode 100755
index 0000000..d59111d
--- /dev/null
+++ b/t/t6115-rev-list-du.sh
@@ -0,0 +1,73 @@
+#!/bin/sh
+
+test_description='basic tests of rev-list --disk-usage'
+. ./test-lib.sh
+
+# we want a mix of reachable and unreachable, as well as
+# objects in the bitmapped pack and some outside of it
+test_expect_success 'set up repository' '
+	test_commit --no-tag one &&
+	test_commit --no-tag two &&
+	git repack -adb &&
+	git reset --hard HEAD^ &&
+	test_commit --no-tag three &&
+	test_commit --no-tag four &&
+	git reset --hard HEAD^
+'
+
+# We don't want to hardcode sizes, because they depend on the exact details of
+# packing, zlib, etc. We'll assume that the regular rev-list and cat-file
+# machinery works and compare the --disk-usage output to that.
+disk_usage_slow () {
+	git rev-list --no-object-names "$@" |
+	git cat-file --batch-check="%(objectsize:disk)" |
+	perl -lne '$total += $_; END { print $total}'
+}
+
+# check behavior with given rev-list options; note that
+# whitespace is not preserved in args
+check_du () {
+	args=$*
+
+	test_expect_success "generate expected size ($args)" "
+		disk_usage_slow $args >expect
+	"
+
+	test_expect_success "rev-list --disk-usage without bitmaps ($args)" "
+		git rev-list --disk-usage $args >actual &&
+		test_cmp expect actual
+	"
+
+	test_expect_success "rev-list --disk-usage with bitmaps ($args)" "
+		git rev-list --disk-usage --use-bitmap-index $args >actual &&
+		test_cmp expect actual
+	"
+}
+
+check_du HEAD
+check_du --objects HEAD
+check_du --objects HEAD^..HEAD
+
+# As mentioned above, don't use hardcode sizes as actual size, but use the
+# output from git cat-file.
+test_expect_success 'rev-list --disk-usage=human' '
+	git rev-list --objects HEAD --disk-usage=human >actual &&
+	disk_usage_slow --objects HEAD >actual_size &&
+	grep "$(cat actual_size) bytes" actual
+'
+
+test_expect_success 'rev-list --disk-usage=human with bitmaps' '
+	git rev-list --objects HEAD --use-bitmap-index --disk-usage=human >actual &&
+	disk_usage_slow --objects HEAD >actual_size &&
+	grep "$(cat actual_size) bytes" actual
+'
+
+test_expect_success 'rev-list use --disk-usage unproperly' '
+	test_must_fail git rev-list --objects HEAD --disk-usage=typo 2>err &&
+	cat >expect <<-\EOF &&
+	fatal: invalid value for '\''--disk-usage=<format>'\'': '\''typo'\'', the only allowed format is '\''human'\''
+	EOF
+	test_cmp err expect
+'
+
+test_done