Improve sharness testing on ipfs repo verify

test/sharness/t0086-repo-verify.sh

@@ -0,0 +1,60 @@
+#!/bin/sh
+#
+# Copyright (c) 2016 Jeromy Johnson
+# MIT Licensed; see the LICENSE file in this repository.
+#
+
+test_description="Test ipfs repo fsck"
+
+. lib/test-lib.sh
+
+test_init_ipfs
+
+sort_rand() {
+	case `uname` in
+		Linux)
+			sort -R
+			;;
+		Darwin)
+			ruby -e 'puts STDIN.readlines.shuffle'
+			;;
+		*)
+			echo "unsupported system: $(uname)"
+	esac
+}
+
+check_random_corruption() {
+	to_break=$(find "$IPFS_PATH/blocks" -type f | sort_rand | head -n 1)
+
+	test_expect_success "back up file and overwrite it" '
+		cp "$to_break" backup_file &&
+		echo "this is super broken" > "$to_break"
+	'
+
+	test_expect_success "repo verify detects failure" '
+		test_expect_code 1 ipfs repo verify 
+	'
+
+	test_expect_success "replace the object" '
+		cp backup_file "$to_break"
+	'
+
+	test_expect_success "ipfs repo verify passes just fine now" '
+		ipfs repo verify
+	'
+}
+
+test_expect_success "create some files" '
+	random-files -depth=3 -dirs=4 -files=10 foobar > /dev/null
+'
+
+test_expect_success "add them all" '
+	ipfs add -r -q foobar > /dev/null
+'
+
+for i in `seq 20`
+do
+	check_random_corruption
+done
+
+test_done