istio.io/istio@v0.0.0-20240520182934-d79c90f27776/istioctl/pkg/writer/table/writer_test.go (about)

     1  // Copyright Istio Authors
     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  //     http://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  package table
    16  
    17  import (
    18  	"bytes"
    19  	"testing"
    20  
    21  	"github.com/fatih/color"
    22  )
    23  
    24  type testObject struct {
    25  	name      string
    26  	namespace string
    27  	version   string
    28  }
    29  
    30  var newTestObject = func(name, namespace, version string) testObject {
    31  	return testObject{
    32  		name:      name,
    33  		namespace: namespace,
    34  		version:   version,
    35  	}
    36  }
    37  
    38  func TestWriter(t *testing.T) {
    39  	got := &bytes.Buffer{}
    40  	w := NewStyleWriter(got)
    41  	w.AddHeader("NAME", "NAMESPACE", "VERSION")
    42  	w.SetAddRowFunc(func(obj interface{}) Row {
    43  		o := obj.(testObject)
    44  		return Row{
    45  			Cells: []Cell{
    46  				NewCell(o.name),
    47  				NewCell(o.namespace, color.FgGreen),
    48  				NewCell(o.version),
    49  			},
    50  		}
    51  	})
    52  	w.AddRow(newTestObject("foo", "bar", "1.0"))
    53  	w.AddRow(newTestObject("baz", "qux", "2.0"))
    54  	w.AddRow(newTestObject("qux", "quux", "3"))
    55  	w.Flush()
    56  	expected := "NAME  NAMESPACE      VERSION\n" +
    57  		"foo   \x1b[32mbar\x1b[0m            1.0\n" +
    58  		"baz   \x1b[32mqux\x1b[0m            2.0\n" +
    59  		"qux   \x1b[32mquux\x1b[0m           3\n"
    60  	if got.String() != expected {
    61  		t.Errorf("got %q, want %q", got.String(), expected)
    62  	}
    63  }