You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: floydwarshall_test.go
    path of file: ./repos/gonum/graph/path
    
    the code of the file until where you have to start completion: // Copyright Â©2015 The Gonum Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package path

import (
	"math"
	"reflect"
	"testing"

	"gonum.org/v1/gonum/graph"
	"gonum.org/v1/gonum/graph/internal/ordered"
	"gonum.org/v1/gonum/graph/path/internal/testgraphs"
)

func TestFloydWarshall(t *testing.T) {
	t.Parallel()
	for _, test := range testgraphs.ShortestPathTests {
		g := test.Graph()
		for _, e := range test.Edges {
			g.SetWeightedEdge(e)
		}

		pt, ok := FloydWarshall(g.(graph.Graph))
		if test.HasNegativeCycle {
			if ok {
				t.Errorf("%q: expected negative cycle", test.Name)
			}
			continue
		}
		if !ok {
			t.Fatalf("%q: unexpected negative cycle", test.Name)
		}

		// Check all random paths returned are OK.
		for i := 0; i < 10; i++ {
			p, weight, unique := pt.Between(test.Query.From().ID(), test.Query.To().ID())
			if weight != test.Weight {
				t.Errorf("%q: unexpected weight from Between: got:%f want:%f",
					test.Name, weight, test.Weight)
			}
			if weight := pt.Wei
    
func TestFloydWarshall(t *testing.T) {
	t.Parallel()
	for _, test := range testgraphs.ShortestPathTests {
		g := test.Graph()
		for _, e := range test.Edges {
			g.SetWeightedEdge(e)
		}

		pt, ok := FloydWarshall(g.(graph.Graph))
		if test.HasNegativeCycle {
			if ok {
				t.Errorf("%q: expected negative cycle", test.Name)
			}
			continue
		}
		if !ok {
			t.Fatalf("%q: unexpected negative cycle", test.Name)
		}

		// Check all random paths returned are OK.
		for i := 0; i < 10; i++ {
			p, weight, unique := pt.Between(test.Query.From().ID(), test.Query.To().ID())
			if weight != test.Weight {
				t.Errorf("%q: unexpected weight from Between: got:%f want:%f",
					test.Name, weight, test.Weight)
			}
			if weight := pt.Weight(test.Query.From().ID(), test.Query.To().ID()); weight != test.Weight {
				t.Errorf("%q: unexpected weight from Weight: got:%f want:%f",
					test.Name, weight, test.Weight)
			}
			if unique != test.HasUniquePath {
				t.Errorf("%q: unexpected number of paths: got: unique=%t want: unique=%t",
					test.Name, unique, test.HasUniquePath)
			}

			var got []int64
			for _, n := range p {
				got = append(got, n.ID())
			}
			ok := len(got) == 0 && len(test.WantPaths) == 0
			for _, sp := range test.WantPaths {
				if reflect.DeepEqual(got, sp) {
					ok = true
					break
				}
			}
			if !ok {
				t.Errorf("%q: unexpected shortest path:\ngot: %v\nwant from:%v",
					test.Name, p, test.WantPaths)
			}
		}

		np, weight, unique := pt.Between(test.NoPathFor.From().ID(), test.NoPathFor.To().ID())
		if np != nil || !math.IsInf(weight, 1) || unique {
			t.Errorf("%q: unexpected path:\ngot: path=%v weight=%f unique=%t\nwant:path=<nil> weight=+Inf unique=false",
				test.Name, np, weight, unique)
		}

		paths, weight := pt.AllBetween(test.Query.From().ID(), test.Query.To().ID())
		if weight != test.Weight {
			t.Errorf("%q: unexpected weight from Between: got:%f want:%f",
				test.Name, weight, test.Weight)
		}

		var got [][]int64
		if len(paths) != 0 {
			got = make([][]int64, len(paths))
		}
		for i, p := range paths {
			for _, v := range p {
				got[i] = append(got[i], v.ID())
			}
		}
		ordered.BySliceValues(got)
		if !reflect.DeepEqual(got, test.WantPaths) {
			t.Errorf("testing %q: unexpected shortest paths:\ngot: %v\nwant:%v",
				test.Name, got, test.WantPaths)
		}

		paths = paths[:0]
		pt.AllBetweenFunc(test.Query.From().ID(), test.Query.To().ID(), func(path []graph.Node) {
			paths = append(paths, append([]graph.Node(nil), path...))
		})
		got = nil
		if len(paths) != 0 {
			got = make([][]int64, len(paths))
		}
		for i, p := range paths {
			for _, v := range p {
				got[i] = append(got[i], v.ID())
			}
		}
		ordered.BySliceValues(got)
		if !reflect.DeepEqual(got, test.WantPaths) {
			t.Errorf("testing %q: unexpected shortest paths:\ngot: %v\nwant:%v",
				test.Name, got, test.WantPaths)
		}

		nps, weight := pt.AllBetween(test.NoPathFor.From().ID(), test.NoPathFor.To().ID())
		if nps != nil || !math.IsInf(weight, 1) {
			t.Errorf("%q: unexpected path:\ngot: paths=%v weight=%f\nwant:path=<nil> weight=+Inf",
				test.Name, nps, weight)
		}
	}
}