Read a commit as the same as itself however short, and fit the pending assignments' tests to a mesh that asks no build (issue 1851, A9, A10)

cmd/mesh-controller/same_commit_test.go

@@ -0,0 +1,17 @@
+package main
+
+import "testing"
+
+// A held build's commit as recorded and as registered name one commit however each is abbreviated, a short name
+// included (the fault the try of R4e's controller found: "c0" was never the same as "c0").
+func TestACommitIsTheSameAsItselfHoweverShort(t *testing.T) {
+	for _, c := range []struct {
+		a, b string
+		same bool
+	}{{"c0", "c0", true}, {"c0ffee0123456789", "c0ffee0", true}, {"c0ffee0123", "c0ffee0999", false}, {"", "", false},
+		{"c0", "c1", false}} {
+		if got := sameCommitID(c.a, c.b); got != c.same {
+			t.Errorf("%q %q: %v", c.a, c.b, got)
+		}
+	}
+}