go-hep.org/x/hep@v0.38.1/rio/file_test.go (about)

     1  // Copyright ©2015 The go-hep Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package rio
     6  
     7  import (
     8  	"bytes"
     9  	"fmt"
    10  	"reflect"
    11  	"testing"
    12  )
    13  
    14  func TestFile(t *testing.T) {
    15  	buf := new(bytes.Buffer)
    16  	w, err := NewWriter(buf)
    17  	if err != nil {
    18  		t.Fatalf("error creating new rio Writer: %v", err)
    19  	}
    20  
    21  	evt1 := event{
    22  		runnbr: 10,
    23  		evtnbr: 11,
    24  		id:     "id-11",
    25  		eles:   []electron{newElectron(11, 12, 13, 14)},
    26  		muons:  []muon{newMuon(11, 12, 13, 14)},
    27  	}
    28  	err = w.WriteValue("evt1", &evt1)
    29  	if err != nil {
    30  		t.Fatalf("error writing value [evt1]: %v", err)
    31  	}
    32  
    33  	evt2 := event{
    34  		runnbr: 10,
    35  		evtnbr: 12,
    36  		id:     "id-22",
    37  		eles:   []electron{newElectron(21, 22, 23, 24)},
    38  		muons:  []muon{newMuon(21, 22, 23, 24)},
    39  	}
    40  	err = w.WriteValue("evt2", &evt2)
    41  	if err != nil {
    42  		t.Fatalf("error writing value [evt2]: %v", err)
    43  	}
    44  
    45  	err = w.Close()
    46  	if err != nil {
    47  		t.Fatalf("error closing rio writer: %v", err)
    48  	}
    49  
    50  	r := bytes.NewReader(buf.Bytes())
    51  
    52  	f, err := Open(r)
    53  	if err != nil {
    54  		t.Fatalf("error opening file: %v\n", err)
    55  	}
    56  	defer f.Close()
    57  
    58  	keys := []RecordDesc{
    59  		{
    60  			Name: "evt1",
    61  			Blocks: []BlockDesc{
    62  				{
    63  					Name: "evt1",
    64  					Type: "*go-hep.org/x/hep/rio.event",
    65  				},
    66  			},
    67  		},
    68  		{
    69  			Name: "evt2",
    70  			Blocks: []BlockDesc{
    71  				{
    72  					Name: "evt2",
    73  					Type: "*go-hep.org/x/hep/rio.event",
    74  				},
    75  			},
    76  		},
    77  	}
    78  	if !reflect.DeepEqual(keys, f.Keys()) {
    79  		t.Fatalf("keys differ.\ngot= %v\nwant=%v\n", f.Keys(), keys)
    80  	}
    81  
    82  	if !f.Has("evt1") {
    83  		t.Fatalf("expected 'evt1' to be present in file")
    84  	}
    85  	if f.Has("not-there") {
    86  		t.Fatalf("did not expect a 'not-there' record in file")
    87  	}
    88  
    89  	var (
    90  		revt1 event
    91  		revt2 event
    92  	)
    93  
    94  	err = f.Get("evt2", &revt2)
    95  	if err != nil {
    96  		t.Fatalf("error: %v\n", err)
    97  	}
    98  
    99  	err = f.Get("evt1", &revt1)
   100  	if err != nil {
   101  		t.Fatalf("error: %v\n", err)
   102  	}
   103  
   104  	if !reflect.DeepEqual(evt1, revt1) {
   105  		t.Fatalf("evt1 differ.\ngot= %v\nwant=%v\n", revt1, evt1)
   106  	}
   107  
   108  	if !reflect.DeepEqual(evt2, revt2) {
   109  		t.Fatalf("evt2 differ.\ngot= %v\nwant=%v\n", revt2, evt2)
   110  	}
   111  }
   112  
   113  func TestInvalidFile(t *testing.T) {
   114  	for _, tc := range []struct {
   115  		r   []byte
   116  		err error
   117  	}{
   118  		{
   119  			r:   nil,
   120  			err: fmt.Errorf("rio: error reading magic-header: EOF"),
   121  		},
   122  		{
   123  			r:   []byte{'s', 'i', 'o', '\x00'},
   124  			err: fmt.Errorf("rio: not a rio-stream. magic-header=\"sio\\x00\". want=\"rio\\x00\""),
   125  		},
   126  		{
   127  			r:   []byte{'r', 'i', 'o', '\x00'},
   128  			err: fmt.Errorf("rio: error seeking footer: bytes.Reader.Seek: negative position"),
   129  		},
   130  	} {
   131  		t.Run("", func(t *testing.T) {
   132  			r := bytes.NewReader(tc.r)
   133  			f, err := Open(r)
   134  			if got, want := err.Error(), tc.err.Error(); got != want {
   135  				t.Fatalf("got=%s, want=%s", got, want)
   136  			}
   137  			defer f.Close()
   138  		})
   139  	}
   140  }