61 lines
2.2 KiB
Go
61 lines
2.2 KiB
Go
package commandkit
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import (
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"errors"
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"fmt"
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"io"
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"testing"
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)
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func TestReporterPreservesJoinedRendererEvidence(t *testing.T) {
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for _, kind := range []string{"output", "detail"} {
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for _, test := range []struct {
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name string
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combine func(error, error) error
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rendering bool
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}{
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{"joined", func(render, write error) error { return errors.Join(render, write) }, true},
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{"wrapped join", func(render, write error) error {
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return fmt.Errorf("rendering context: %w", errors.Join(write, render))
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}, true},
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{"plain write", func(_, write error) error { return write }, false},
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{"wrapped write", func(_, write error) error { return fmt.Errorf("writing context: %w", write) }, false},
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{"joined write only", func(_, write error) error { return errors.Join(write, fmt.Errorf("same writer: %w", write)) }, false},
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} {
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t.Run(kind+"/"+test.name, func(t *testing.T) {
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renderErr := errors.New("independent rendering failure")
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// The destination error can itself be a joined value. Returning that
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// complete error still propagates a single destination failure.
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writeErr := errors.Join(errors.New("sink failure"), errors.New("sink detail"))
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destination := &reporterTestWriter{err: writeErr}
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reporter := newReporter(Streams{Out: destination, Err: destination})
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reporter.setVisibility(modeVerbose, false, false)
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render := func(w io.Writer) error {
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_, err := io.WriteString(w, "report")
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return test.combine(renderErr, err)
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}
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var err error
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if kind == "output" {
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err = reporter.RenderOutput(render)
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} else {
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err = reporter.Warn("", render)
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}
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if !errors.Is(err, writeErr) || errors.Is(err, renderErr) != test.rendering {
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t.Fatalf("returned error lost evidence: %v", err)
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}
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got := reporter.finalize(Success(), nil)
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result := got.Presentation.Output
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if kind == "detail" {
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result = got.Presentation.Diagnostics
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}
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if result.State != DeliveryIncomplete || !errors.Is(result.WriteError, writeErr) || errors.Is(result.RenderError, renderErr) != test.rendering {
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t.Fatalf("presentation=%#v", result)
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}
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if !test.rendering && result.RenderError != nil {
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t.Fatalf("write propagation became rendering evidence: %v", result.RenderError)
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}
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})
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}
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}
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}
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