libsnapshot: Fix test failure in CancelOnTargetSlot.

This test fails because CreateLogicalPartitions is effectively called
twice without unmapping anything.

Bug: 208944665
Test: run_snapshot_tests.sh
Change-Id: I7e79f43e8de2f79bb72888c4198a95d9bd76bcdd

parent 8875abd9

fs_mgr/libsnapshot/snapshot_test.cpp

+2 −0

Original line number	Diff line number	Diff line
		@@ -2215,6 +2215,8 @@ TEST_F(SnapshotUpdateTest, MapAllSnapshots) {
		TEST_F(SnapshotUpdateTest, CancelOnTargetSlot) {
		AddOperationForPartitions();

		ASSERT_TRUE(UnmapAll());

		// Execute the update from B->A.
		test_device->set_slot_suffix("_b");
		ASSERT_TRUE(sm->BeginUpdate());