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run: Allow mocking by passing mock function through context
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,3 @@ | ||
| module github.com/DavidGamba/dgtools/run | ||
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| go 1.14 | ||
| go 1.18 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| package run_test | ||
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| import ( | ||
| "context" | ||
| "fmt" | ||
| "slices" | ||
| "testing" | ||
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| "github.com/DavidGamba/dgtools/run" | ||
| ) | ||
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| func TestRunWithMocks(t *testing.T) { | ||
| t.Run("mock", func(t *testing.T) { | ||
| r := run.CMD("ls", "./run") | ||
| r.Mock(func(r *run.RunInfo) error { | ||
| r.Stdout.Write([]byte("hello world\n")) | ||
| r.Stderr.Write([]byte("hola mundo\n")) | ||
| return nil | ||
| }) | ||
| out, err := r.CombinedOutput() | ||
| if err != nil { | ||
| t.Errorf("unexpected error") | ||
| } | ||
| if string(out) != "hello world\nhola mundo\n" { | ||
| t.Errorf("wrong output: %s\n", out) | ||
| } | ||
| }) | ||
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| t.Run("mock with context", func(t *testing.T) { | ||
| ctx := context.Background() | ||
| mockR := run.CMD().Mock(func(r *run.RunInfo) error { | ||
| r.Stdout.Write([]byte("hello world\n")) | ||
| r.Stderr.Write([]byte("hola mundo\n")) | ||
| return nil | ||
| }) | ||
| ctx = run.ContextWithRunInfo(ctx, mockR) | ||
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| r := run.CMDCtx(ctx, "ls", "./run") | ||
| out, err := r.CombinedOutput() | ||
| if err != nil { | ||
| t.Errorf("unexpected error") | ||
| } | ||
| if string(out) != "hello world\nhola mundo\n" { | ||
| t.Errorf("wrong output: %s\n", out) | ||
| } | ||
| }) | ||
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| t.Run("mock with context switch", func(t *testing.T) { | ||
| ctx := context.Background() | ||
| mockR := run.CMD().Mock(func(r *run.RunInfo) error { | ||
| cmd := r.Cmd | ||
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| switch { | ||
| case slices.Compare(cmd, []string{"ls", "./run"}) == 0: | ||
| r.Stdout.Write([]byte("hello world\n")) | ||
| r.Stderr.Write([]byte("hola mundo\n")) | ||
| return nil | ||
| case slices.Compare(cmd, []string{"ls", "x"}) == 0: | ||
| r.Stderr.Write([]byte("not found x\n")) | ||
| return fmt.Errorf("not found x") | ||
| default: | ||
| return fmt.Errorf("unexpected command: %s", cmd) | ||
| } | ||
| }) | ||
| ctx = run.ContextWithRunInfo(ctx, mockR) | ||
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| r := run.CMDCtx(ctx, "ls", "./run") | ||
| out, err := r.CombinedOutput() | ||
| if err != nil { | ||
| t.Errorf("unexpected error: %s", err) | ||
| } | ||
| if string(out) != "hello world\nhola mundo\n" { | ||
| t.Errorf("wrong output: %s\n", out) | ||
| } | ||
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| r = run.CMDCtx(ctx, "ls", "x") | ||
| out, err = r.CombinedOutput() | ||
| if err == nil { | ||
| t.Errorf("expected error") | ||
| } | ||
| if string(out) != "not found x\n" { | ||
| t.Errorf("wrong output: %s\n", out) | ||
| } | ||
| }) | ||
| } |