Function TestIterator

graph/graphtest/graphtest.go:525–602

(t testing.TB, gen testutil.DatabaseFunc, _ *Config)

}

func TestIterator(t testing.TB, gen testutil.DatabaseFunc, _ *Config) {
	ctx := context.TODO()
	qs, opts, closer := gen(t)
	defer closer()

	testutil.MakeWriter(t, qs, opts, MakeQuadSet()...)

	var it graph.Iterator

	it = qs.NodesAllIterator()
	require.NotNil(t, it)

	size, _ := it.Size()
	require.True(t, size > 0 && size < 23, "Unexpected size: %v", size)
	// TODO: leveldb had this test
	//if exact {
	//	t.Errorf("Got unexpected exact result.")
	//}

	optIt, changed := it.Optimize()
	require.True(t, !changed && optIt == it, "Optimize unexpectedly changed iterator: %v, %T(%p) vs %T(%p)", changed, optIt, optIt, it, it)

	expect := []string{
		"A",
		"B",
		"C",
		"D",
		"E",
		"F",
		"G",
		"follows",
		"status",
		"cool",
		"status_graph",
	}
	sort.Strings(expect)
	for i := 0; i < 2; i++ {
		got := IteratedStrings(t, qs, it)
		sort.Strings(got)
		require.Equal(t, expect, got, "Unexpected iterated result on repeat %d", i)
		it.Reset()
	}

	for _, pq := range expect {
		ok := it.Contains(ctx, qs.ValueOf(quad.Raw(pq)))
		require.NoError(t, it.Err())
		require.True(t, ok, "Failed to find and check %q correctly", pq)

	}
	// FIXME(kortschak) Why does this fail?
	/*
		for _, pq := range []string{"baller"} {
			if it.Contains(qs.ValueOf(pq)) {
				t.Errorf("Failed to check %q correctly", pq)
			}
		}
	*/
	it.Reset()