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a8af81fe20
We want the middle ground between a small compression size, a fast compression time and a fast decompression time. Tests suggest that the default compression level is better than the maximum compression level: although the reports are 4% bigger and decompress slower, they compress 33% faster. See discussion on https://github.com/weaveworks/scope/issues/1457#issuecomment-293288682
58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
package report_test
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import (
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"bytes"
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"compress/gzip"
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"reflect"
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"testing"
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"github.com/weaveworks/scope/report"
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)
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func TestRoundtrip(t *testing.T) {
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var buf bytes.Buffer
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r1 := report.MakeReport()
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r1.WriteBinary(&buf, gzip.DefaultCompression)
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bytes := append([]byte{}, buf.Bytes()...) // copy the contents for later
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r2, err := report.MakeFromBinary(&buf)
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if err != nil {
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t.Error(err)
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}
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if !reflect.DeepEqual(r1, *r2) {
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t.Errorf("%v != %v", r1, *r2)
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}
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r3, err := report.MakeFromBytes(bytes)
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if err != nil {
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t.Error(err)
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}
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if !reflect.DeepEqual(r1, *r3) {
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t.Errorf("%v != %v", r1, *r3)
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}
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}
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func TestRoundtripNoCompression(t *testing.T) {
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// Make sure that we can use our standard routines for decompressing
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// something with '0' level compression.
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var buf bytes.Buffer
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r1 := report.MakeReport()
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r1.WriteBinary(&buf, 0)
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r2, err := report.MakeFromBinary(&buf)
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if err != nil {
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t.Error(err)
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}
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if !reflect.DeepEqual(r1, *r2) {
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t.Errorf("%v != %v", r1, *r2)
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}
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}
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func TestMoreCompressionMeansSmaller(t *testing.T) {
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// Make sure that 0 level compression actually does compress less.
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var buf1, buf2 bytes.Buffer
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r := report.MakeReport()
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r.WriteBinary(&buf1, gzip.DefaultCompression)
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r.WriteBinary(&buf2, 0)
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if buf1.Len() >= buf2.Len() {
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t.Errorf("Compression doesn't change size: %v >= %v", buf1.Len(), buf2.Len())
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}
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}
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