github.com/yourbase/yb@v0.7.1/cmd/yb/output_test.go (about)

     1  // Copyright 2021 YourBase Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //		 https://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  //
    15  // SPDX-License-Identifier: Apache-2.0
    16  
    17  package main
    18  
    19  import (
    20  	"io"
    21  	"strings"
    22  	"testing"
    23  	"time"
    24  
    25  	"github.com/google/go-cmp/cmp"
    26  )
    27  
    28  func TestLinePrefixWriter(t *testing.T) {
    29  	start := time.Date(2021, time.April, 21, 14, 10, 23, 0, time.FixedZone("America/Los_Angeles", -7*60*60))
    30  	const defaultPrefix = "default"
    31  	const defaultPaddedPrefix = "default           |"
    32  	tests := []struct {
    33  		name   string
    34  		prefix string
    35  		writes []string
    36  		want   string
    37  	}{
    38  		{
    39  			name:   "Empty",
    40  			prefix: defaultPrefix,
    41  			writes: []string{""},
    42  			want:   "",
    43  		},
    44  		{
    45  			name:   "PartialLine",
    46  			prefix: defaultPrefix,
    47  			writes: []string{"foo"},
    48  			want:   "14:10:23 " + defaultPaddedPrefix + " foo",
    49  		},
    50  		{
    51  			name:   "FullLine",
    52  			prefix: defaultPrefix,
    53  			writes: []string{"foo\n"},
    54  			want:   "14:10:23 " + defaultPaddedPrefix + " foo\n",
    55  		},
    56  		{
    57  			name:   "MultipleLines/OneWrite",
    58  			prefix: defaultPrefix,
    59  			writes: []string{"foo\nbar\n"},
    60  			want: "14:10:23 " + defaultPaddedPrefix + " foo\n" +
    61  				"14:10:23 " + defaultPaddedPrefix + " bar\n",
    62  		},
    63  		{
    64  			name:   "MultipleLines/MultipleWrites",
    65  			prefix: defaultPrefix,
    66  			writes: []string{"foo\n", "bar\n"},
    67  			want: "14:10:23 " + defaultPaddedPrefix + " foo\n" +
    68  				"14:10:24 " + defaultPaddedPrefix + " bar\n",
    69  		},
    70  		{
    71  			name:   "MultipleLines/Split",
    72  			prefix: defaultPrefix,
    73  			writes: []string{"foo\nb", "ar\n"},
    74  			want: "14:10:23 " + defaultPaddedPrefix + " foo\n" +
    75  				"14:10:23 " + defaultPaddedPrefix + " bar\n",
    76  		},
    77  		{
    78  			name:   "RSpecDots",
    79  			prefix: defaultPrefix,
    80  			writes: []string{".", ".", ".", ".", "\n"},
    81  			want:   "14:10:23 " + defaultPaddedPrefix + " ....\n",
    82  		},
    83  		{
    84  			name:   "LongPrefix",
    85  			prefix: "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
    86  			writes: []string{"foo\n"},
    87  			want:   "14:10:23 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx| foo\n",
    88  		},
    89  	}
    90  	for _, test := range tests {
    91  		t.Run(test.name, func(t *testing.T) {
    92  			currTime := start
    93  			out := new(strings.Builder)
    94  			w := newLinePrefixWriter(out, test.prefix)
    95  			w.now = func() time.Time {
    96  				result := currTime
    97  				currTime = currTime.Add(1 * time.Second)
    98  				return result
    99  			}
   100  			for i, data := range test.writes {
   101  				if n, err := io.WriteString(w, data); n != len(data) || err != nil {
   102  					t.Errorf("Write[%d](%q) = %d, %v; want %d, <nil>", i, data, n, err, len(data))
   103  				}
   104  			}
   105  			if diff := cmp.Diff(test.want, out.String()); diff != "" {
   106  				t.Errorf("Output (-want +got):\n%s", diff)
   107  			}
   108  		})
   109  	}
   110  }