|
| 1 | +package compress |
| 2 | + |
| 3 | +import ( |
| 4 | + "bytes" |
| 5 | + "compress/flate" |
| 6 | + "compress/gzip" |
| 7 | + "io" |
| 8 | + "strings" |
| 9 | + "testing" |
| 10 | +) |
| 11 | + |
| 12 | +func gzipData(t *testing.T, data string) io.ReadCloser { |
| 13 | + t.Helper() |
| 14 | + var buf bytes.Buffer |
| 15 | + gw := gzip.NewWriter(&buf) |
| 16 | + if _, err := gw.Write([]byte(data)); err != nil { |
| 17 | + t.Fatal(err) |
| 18 | + } |
| 19 | + gw.Close() |
| 20 | + return io.NopCloser(&buf) |
| 21 | +} |
| 22 | + |
| 23 | +func TestGzipReader(t *testing.T) { |
| 24 | + original := "hello world, this is a test string for gzip" |
| 25 | + body := gzipData(t, original) |
| 26 | + gz := NewGzipReader(body) |
| 27 | + defer gz.Close() |
| 28 | + |
| 29 | + out, err := io.ReadAll(gz) |
| 30 | + if err != nil { |
| 31 | + t.Fatalf("ReadAll failed: %v", err) |
| 32 | + } |
| 33 | + if string(out) != original { |
| 34 | + t.Fatalf("got %q, want %q", string(out), original) |
| 35 | + } |
| 36 | +} |
| 37 | + |
| 38 | +func TestGzipReaderInvalidData(t *testing.T) { |
| 39 | + body := io.NopCloser(strings.NewReader("not gzip data")) |
| 40 | + gz := NewGzipReader(body) |
| 41 | + defer gz.Close() |
| 42 | + |
| 43 | + _, err := gz.Read(make([]byte, 10)) |
| 44 | + if err == nil { |
| 45 | + t.Fatal("expected error for invalid gzip data") |
| 46 | + } |
| 47 | +} |
| 48 | + |
| 49 | +func TestGzipReaderCloseTwice(t *testing.T) { |
| 50 | + body := gzipData(t, "test") |
| 51 | + gz := NewGzipReader(body) |
| 52 | + if err := gz.Close(); err != nil { |
| 53 | + t.Fatalf("first close failed: %v", err) |
| 54 | + } |
| 55 | + // After close, Read should return sticky error |
| 56 | + _, err := gz.Read(make([]byte, 10)) |
| 57 | + if err == nil { |
| 58 | + t.Fatal("expected error after close") |
| 59 | + } |
| 60 | +} |
| 61 | + |
| 62 | +func TestGzipReaderGetSetUnderlyingBody(t *testing.T) { |
| 63 | + body1 := gzipData(t, "test1") |
| 64 | + body2 := gzipData(t, "test2") |
| 65 | + gz := NewGzipReader(body1) |
| 66 | + if gz.GetUnderlyingBody() != body1 { |
| 67 | + t.Fatal("GetUnderlyingBody mismatch") |
| 68 | + } |
| 69 | + gz.SetUnderlyingBody(body2) |
| 70 | + if gz.GetUnderlyingBody() != body2 { |
| 71 | + t.Fatal("SetUnderlyingBody failed") |
| 72 | + } |
| 73 | +} |
| 74 | + |
| 75 | +func deflateData(t *testing.T, data string) io.ReadCloser { |
| 76 | + t.Helper() |
| 77 | + var buf bytes.Buffer |
| 78 | + fw, err := flate.NewWriter(&buf, flate.DefaultCompression) |
| 79 | + if err != nil { |
| 80 | + t.Fatal(err) |
| 81 | + } |
| 82 | + fw.Write([]byte(data)) |
| 83 | + fw.Close() |
| 84 | + return io.NopCloser(&buf) |
| 85 | +} |
| 86 | + |
| 87 | +func TestDeflateReader(t *testing.T) { |
| 88 | + original := "hello deflate world" |
| 89 | + body := deflateData(t, original) |
| 90 | + dr := NewDeflateReader(body) |
| 91 | + defer dr.Close() |
| 92 | + |
| 93 | + out, err := io.ReadAll(dr) |
| 94 | + if err != nil { |
| 95 | + t.Fatalf("ReadAll failed: %v", err) |
| 96 | + } |
| 97 | + if string(out) != original { |
| 98 | + t.Fatalf("got %q, want %q", string(out), original) |
| 99 | + } |
| 100 | +} |
| 101 | + |
| 102 | +func TestNewCompressReader(t *testing.T) { |
| 103 | + tests := []struct { |
| 104 | + encoding string |
| 105 | + notNil bool |
| 106 | + }{ |
| 107 | + {"gzip", true}, |
| 108 | + {"deflate", true}, |
| 109 | + {"br", true}, |
| 110 | + {"zstd", true}, |
| 111 | + {"unknown", false}, |
| 112 | + {"", false}, |
| 113 | + } |
| 114 | + for _, tt := range tests { |
| 115 | + t.Run(tt.encoding, func(t *testing.T) { |
| 116 | + body := io.NopCloser(strings.NewReader("")) |
| 117 | + cr := NewCompressReader(body, tt.encoding) |
| 118 | + if tt.notNil && cr == nil { |
| 119 | + t.Fatal("expected non-nil CompressReader") |
| 120 | + } |
| 121 | + if !tt.notNil && cr != nil { |
| 122 | + t.Fatal("expected nil CompressReader") |
| 123 | + } |
| 124 | + }) |
| 125 | + } |
| 126 | +} |
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