repository: remove tie to Bug, improved and reusable testing

- allow the creation of arbitrary Lamport clocks, freeing the way to new entities and removing Bug specific (upper layer) code.
- generalize the memory-only and persisted Lamport clocks behind a common interface
- rework the tests to provide reusable testing code for a Repo, a Clock, a Config, opening a path to add a new Repo implementation more easily
- test previously untested components with those new tests

Note: one problem found during this endeavor is that `identity.Version` also need to store one time + Lamport time for each other Entity (Bug, config, PR ...). This could possibly done without breaking change but it would be much easier to wait for https://github.com/MichaelMure/git-bug-migration to happen.

1 files changed, 8 insertions, 0 deletions

diff --git a/util/lamport/mem_clock_test.go b/util/lamport/mem_clock_test.go
new file mode 100644
index 00000000..e01d2ec0
--- /dev/null
+++ b/util/lamport/mem_clock_test.go
@@ -0,0 +1,8 @@
+package lamport
+
+import "testing"
+
+func TestMemClock(t *testing.T) {
+	c := NewMemClock()
+	testClock(t, c)
+}