mirror of
https://github.com/golang/go
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5f5b110a59
Example: show the transitive closure of imports of the digraph tool itself:
% go list -f '{{.ImportPath}}{{.Imports}}' ... | tr '[]' ' ' |
digraph forward code.google.com/p/go.tools/cmd/digraph
+ basic test.
LGTM=gri
R=gri, sameer
CC=golang-codereviews
https://golang.org/cl/161760043
63 lines
1.3 KiB
Go
63 lines
1.3 KiB
Go
package main
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import (
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"bytes"
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"fmt"
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"strings"
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"testing"
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)
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func TestDigraph(t *testing.T) {
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const g1 = `
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socks shoes
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shorts pants
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pants belt shoes
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shirt tie sweater
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sweater jacket
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hat
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`
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const g2 = `
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a b c
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b d
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c d
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d c
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`
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for _, test := range []struct {
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input string
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cmd string
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args []string
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want string
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}{
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{g1, "nodes", nil, "belt\nhat\njacket\npants\nshirt\nshoes\nshorts\nsocks\nsweater\ntie\n"},
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{g1, "reverse", []string{"jacket"}, "jacket\nshirt\nsweater\n"},
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{g1, "forward", []string{"socks"}, "shoes\nsocks\n"},
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{g1, "forward", []string{"socks", "sweater"}, "jacket\nshoes\nsocks\nsweater\n"},
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{g2, "allpaths", []string{"a", "d"}, "a\nb\nc\nd\n"},
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{g2, "sccs", nil, "a\nb\nc d\n"},
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{g2, "scc", []string{"d"}, "c\nd\n"},
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{g2, "succs", []string{"a"}, "b\nc\n"},
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{g2, "preds", []string{"c"}, "a\nd\n"},
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{g2, "preds", []string{"c", "d"}, "a\nb\nc\nd\n"},
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} {
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stdin = strings.NewReader(test.input)
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stdout = new(bytes.Buffer)
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if err := digraph(test.cmd, test.args); err != nil {
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t.Error(err)
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continue
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}
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got := stdout.(fmt.Stringer).String()
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if got != test.want {
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t.Errorf("digraph(%s, %s) = %q, want %q", test.cmd, test.args, got, test.want)
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}
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}
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// TODO(adonovan):
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// - test somepath (it's nondeterministic).
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// - test errors
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}
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