github.com/mirantis/virtlet@v1.5.2-0.20191204181327-1659b8a48e9b/pkg/utils/command_test.go (about)

     1  /*
     2  Copyright 2018 Mirantis
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package utils
    18  
    19  import (
    20  	"strings"
    21  	"testing"
    22  )
    23  
    24  func TestCommand(t *testing.T) {
    25  	for _, tc := range []struct {
    26  		cmd            []string
    27  		stdin          []byte
    28  		expectedOutput string
    29  		expectedError  string
    30  	}{
    31  		{
    32  			cmd:            []string{"echo", "-n", "foobar"},
    33  			stdin:          nil,
    34  			expectedOutput: "foobar",
    35  		},
    36  		{
    37  			cmd:            []string{"/bin/bash", "-c", "echo -n >&2 'stderr here'; echo -n 'stdout here'; exit 1"},
    38  			stdin:          nil,
    39  			expectedOutput: "stdout here",
    40  			expectedError:  "stderr here",
    41  		},
    42  		{
    43  			cmd:            []string{"sed", "s/foo/bar/g"},
    44  			stdin:          []byte("here is foo; foo."),
    45  			expectedOutput: "here is bar; bar.",
    46  		},
    47  	} {
    48  		t.Run(strings.Join(tc.cmd, " "), func(t *testing.T) {
    49  			c := DefaultCommander.Command(tc.cmd[0], tc.cmd[1:]...)
    50  			switch out, err := c.Run(tc.stdin); {
    51  			case tc.expectedError == "" && err != nil:
    52  				t.Errorf("Command error: %v", err)
    53  			case tc.expectedError != "" && err == nil:
    54  				t.Errorf("Didn't get the expected error")
    55  			case tc.expectedError != "" && !strings.Contains(err.Error(), tc.expectedError):
    56  				t.Errorf("Bad error message %q (no substring %q)", err.Error(), tc.expectedError)
    57  			case tc.expectedError != "" && !strings.Contains(err.Error(), tc.cmd[0]):
    58  				t.Errorf("Bad error message %q (no substring %q)", err.Error(), tc.cmd[0])
    59  			case string(out) != tc.expectedOutput:
    60  				t.Errorf("Command output mismatch: %q instead of %q", out, tc.expectedOutput)
    61  			}
    62  		})
    63  	}
    64  }