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117 lines
2.9 KiB
Go
117 lines
2.9 KiB
Go
// Copyright (c) 2012-2016 The go-diff authors. All rights reserved.
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// https://github.com/sergi/go-diff
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// See the included LICENSE file for license details.
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//
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// go-diff is a Go implementation of Google's Diff, Match, and Patch library
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// Original library is Copyright (c) 2006 Google Inc.
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// http://code.google.com/p/google-diff-match-patch/
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package diffmatchpatch
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import (
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"fmt"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestRunesIndexOf(t *testing.T) {
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type TestCase struct {
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Pattern string
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Start int
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Expected int
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}
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for i, tc := range []TestCase{
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{"abc", 0, 0},
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{"cde", 0, 2},
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{"e", 0, 4},
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{"cdef", 0, -1},
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{"abcdef", 0, -1},
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{"abc", 2, -1},
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{"cde", 2, 2},
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{"e", 2, 4},
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{"cdef", 2, -1},
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{"abcdef", 2, -1},
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{"e", 6, -1},
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} {
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actual := runesIndexOf([]rune("abcde"), []rune(tc.Pattern), tc.Start)
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assert.Equal(t, tc.Expected, actual, fmt.Sprintf("Test case #%d, %#v", i, tc))
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}
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}
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func TestIndexOf(t *testing.T) {
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type TestCase struct {
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String string
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Pattern string
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Position int
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Expected int
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}
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for i, tc := range []TestCase{
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{"hi world", "world", -1, 3},
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{"hi world", "world", 0, 3},
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{"hi world", "world", 1, 3},
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{"hi world", "world", 2, 3},
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{"hi world", "world", 3, 3},
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{"hi world", "world", 4, -1},
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{"abbc", "b", -1, 1},
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{"abbc", "b", 0, 1},
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{"abbc", "b", 1, 1},
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{"abbc", "b", 2, 2},
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{"abbc", "b", 3, -1},
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{"abbc", "b", 4, -1},
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// The greek letter beta is the two-byte sequence of "\u03b2".
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{"a\u03b2\u03b2c", "\u03b2", -1, 1},
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{"a\u03b2\u03b2c", "\u03b2", 0, 1},
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{"a\u03b2\u03b2c", "\u03b2", 1, 1},
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{"a\u03b2\u03b2c", "\u03b2", 3, 3},
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{"a\u03b2\u03b2c", "\u03b2", 5, -1},
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{"a\u03b2\u03b2c", "\u03b2", 6, -1},
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} {
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actual := indexOf(tc.String, tc.Pattern, tc.Position)
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assert.Equal(t, tc.Expected, actual, fmt.Sprintf("Test case #%d, %#v", i, tc))
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}
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}
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func TestLastIndexOf(t *testing.T) {
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type TestCase struct {
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String string
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Pattern string
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Position int
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Expected int
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}
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for i, tc := range []TestCase{
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{"hi world", "world", -1, -1},
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{"hi world", "world", 0, -1},
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{"hi world", "world", 1, -1},
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{"hi world", "world", 2, -1},
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{"hi world", "world", 3, -1},
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{"hi world", "world", 4, -1},
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{"hi world", "world", 5, -1},
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{"hi world", "world", 6, -1},
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{"hi world", "world", 7, 3},
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{"hi world", "world", 8, 3},
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{"abbc", "b", -1, -1},
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{"abbc", "b", 0, -1},
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{"abbc", "b", 1, 1},
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{"abbc", "b", 2, 2},
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{"abbc", "b", 3, 2},
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{"abbc", "b", 4, 2},
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// The greek letter beta is the two-byte sequence of "\u03b2".
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{"a\u03b2\u03b2c", "\u03b2", -1, -1},
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{"a\u03b2\u03b2c", "\u03b2", 0, -1},
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{"a\u03b2\u03b2c", "\u03b2", 1, 1},
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{"a\u03b2\u03b2c", "\u03b2", 3, 3},
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{"a\u03b2\u03b2c", "\u03b2", 5, 3},
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{"a\u03b2\u03b2c", "\u03b2", 6, 3},
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} {
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actual := lastIndexOf(tc.String, tc.Pattern, tc.Position)
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assert.Equal(t, tc.Expected, actual, fmt.Sprintf("Test case #%d, %#v", i, tc))
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}
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}
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