59 lines
962 B
Go
59 lines
962 B
Go
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package terraform
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import (
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"strings"
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"testing"
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"github.com/hashicorp/terraform/dag"
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)
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func TestVertexTransformer_impl(t *testing.T) {
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var _ GraphTransformer = new(VertexTransformer)
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}
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func TestVertexTransformer(t *testing.T) {
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var g Graph
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g.Add(1)
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g.Add(2)
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g.Add(3)
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g.Connect(dag.BasicEdge(1, 2))
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g.Connect(dag.BasicEdge(2, 3))
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{
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tf := &VertexTransformer{
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Transforms: []GraphVertexTransformer{
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&testVertexTransform{Source: 2, Target: 42},
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},
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}
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if err := tf.Transform(&g); err != nil {
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t.Fatalf("err: %s", err)
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}
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}
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actual := strings.TrimSpace(g.String())
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expected := strings.TrimSpace(testVertexTransformerStr)
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if actual != expected {
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t.Fatalf("bad: %s", actual)
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}
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}
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type testVertexTransform struct {
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Source, Target dag.Vertex
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}
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func (t *testVertexTransform) Transform(v dag.Vertex) (dag.Vertex, error) {
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if t.Source == v {
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v = t.Target
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}
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return v, nil
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}
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const testVertexTransformerStr = `
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1
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42
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3
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42
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3
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`
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