Function TestGetCandidateMembers

internal/server/db/node_test.go:308–329

If there are 2 online nodes, return the address of the one with the least number of instances.

(t *testing.T)

// If there are 2 online nodes, return the address of the one with the least
// number of instances.
func TestGetCandidateMembers(t *testing.T) {
	tx, cleanup := db.NewTestClusterTx(t)
	defer cleanup()

	_, err := tx.CreateNode("buzz", "1.2.3.4:666")
	require.NoError(t, err)

	// Add an instance to the default node (ID 1)
	_, err = tx.Tx().Exec(`
INSERT INTO instances (id, node_id, name, architecture, type, project_id, description) VALUES (1, 1, 'foo', 1, 1, 1, '')
`)
	require.NoError(t, err)

	allMembers, err := tx.GetNodes(context.Background())
	require.NoError(t, err)

	members, err := tx.GetCandidateMembers(context.Background(), allMembers, nil, "", nil, time.Duration(db.DefaultOfflineThreshold)*time.Second)
	require.NoError(t, err)
	require.Len(t, members, 2)

	assert.Equal(t, "buzz", members[0].Name)
}

// If there are nodes, and one of them is offline, return the name of the
// online node, even if the offline one has more instances.