44 lines
1.0 KiB
Go
44 lines
1.0 KiB
Go
package proxyd
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import (
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"github.com/stretchr/testify/require"
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"io"
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"strings"
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"testing"
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)
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func TestLimitReader(t *testing.T) {
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data := "hellohellohellohello"
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r := LimitReader(strings.NewReader(data), 3)
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buf := make([]byte, 3)
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// Buffer reads OK
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n, err := r.Read(buf)
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require.NoError(t, err)
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require.Equal(t, 3, n)
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// Buffer is over limit
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n, err = r.Read(buf)
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require.Equal(t, ErrLimitReaderOverLimit, err)
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require.Equal(t, 0, n)
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// Buffer on initial read is over size
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buf = make([]byte, 16)
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r = LimitReader(strings.NewReader(data), 3)
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n, err = r.Read(buf)
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require.NoError(t, err)
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require.Equal(t, 3, n)
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// test with read all where the limit is less than the data
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r = LimitReader(strings.NewReader(data), 3)
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out, err := io.ReadAll(r)
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require.Equal(t, ErrLimitReaderOverLimit, err)
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require.Equal(t, "hel", string(out))
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// test with read all where the limit is more than the data
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r = LimitReader(strings.NewReader(data), 21)
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out, err = io.ReadAll(r)
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require.NoError(t, err)
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require.Equal(t, data, string(out))
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}
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