github.com/ovsinc/prototool@v1.3.0/internal/diff/diff_test.go (about)

     1  // Copyright (c) 2018 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  // Primarily adapted from https://github.com/golang/go/blob/e86168430f0aab8f971763e4b00c2aae7bec55f0/src/cmd/gofmt/gofmt.go.
    22  // Copyright 2009 The Go Authors. All rights reserved.
    23  // Use of this source code is governed by a BSD-style
    24  // license that can be found in the LICENSE file.
    25  
    26  package diff
    27  
    28  import (
    29  	"testing"
    30  
    31  	"github.com/stretchr/testify/assert"
    32  )
    33  
    34  func TestDo(t *testing.T) {
    35  	testDo(t, "", "", nil)
    36  	testDo(t, "abc", "abc", nil)
    37  	testDo(t, "abc", "abd", nil, "-abc", "+abd")
    38  	testDo(t, "abc\nabc", "abc\nabd", nil, "-abc", "+abd")
    39  	testDo(t, "abc\nabc", "abc\nabc", nil)
    40  }
    41  
    42  func testDo(
    43  	t *testing.T,
    44  	input string,
    45  	output string,
    46  	expectedError error,
    47  	expectedDiffs ...string,
    48  ) {
    49  	diff, err := Do([]byte(input), []byte(output), "")
    50  	for _, expectedDiff := range expectedDiffs {
    51  		assert.Contains(t, string(diff), expectedDiff, "diff does not contain %s", expectedDiff)
    52  	}
    53  	assert.Equal(t, expectedError, err)
    54  }