25 lines
421 B
Go
25 lines
421 B
Go
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package bytecounter
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import (
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"bytes"
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"io"
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"testing"
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"testing/iotest"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestByteCounter(t *testing.T) {
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r := bytes.NewBufferString("0123456789")
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w := bytes.NewBuffer(nil)
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tw := iotest.TruncateWriter(w, 4)
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bc := New(tw)
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_, err := io.Copy(bc, r)
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require.NoError(t, err)
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assert.Len(t, w.Bytes(), 4)
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assert.Equal(t, 4, bc.N)
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}
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