summaryrefslogtreecommitdiffhomepage
path: root/pkg/buffer/view_test.go
diff options
context:
space:
mode:
Diffstat (limited to 'pkg/buffer/view_test.go')
-rw-r--r--pkg/buffer/view_test.go900
1 files changed, 0 insertions, 900 deletions
diff --git a/pkg/buffer/view_test.go b/pkg/buffer/view_test.go
deleted file mode 100644
index 796efa240..000000000
--- a/pkg/buffer/view_test.go
+++ /dev/null
@@ -1,900 +0,0 @@
-// Copyright 2020 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package buffer
-
-import (
- "bytes"
- "context"
- "fmt"
- "io"
- "reflect"
- "strings"
- "testing"
-
- "gvisor.dev/gvisor/pkg/state"
-)
-
-const bufferSize = defaultBufferSize
-
-func fillAppend(v *View, data []byte) {
- v.Append(data)
-}
-
-func fillAppendEnd(v *View, data []byte) {
- v.Grow(bufferSize-1, false)
- v.Append(data)
- v.TrimFront(bufferSize - 1)
-}
-
-func fillWriteFromReader(v *View, data []byte) {
- b := bytes.NewBuffer(data)
- v.WriteFromReader(b, int64(len(data)))
-}
-
-func fillWriteFromReaderEnd(v *View, data []byte) {
- v.Grow(bufferSize-1, false)
- b := bytes.NewBuffer(data)
- v.WriteFromReader(b, int64(len(data)))
- v.TrimFront(bufferSize - 1)
-}
-
-var fillFuncs = map[string]func(*View, []byte){
- "append": fillAppend,
- "appendEnd": fillAppendEnd,
- "writeFromReader": fillWriteFromReader,
- "writeFromReaderEnd": fillWriteFromReaderEnd,
-}
-
-func BenchmarkReadAt(b *testing.B) {
- b.ReportAllocs()
- var v View
- v.Append(make([]byte, 100))
-
- buf := make([]byte, 10)
- for i := 0; i < b.N; i++ {
- v.ReadAt(buf, 0)
- }
-}
-
-func BenchmarkWriteRead(b *testing.B) {
- b.ReportAllocs()
- var v View
- sz := 1000
- wbuf := make([]byte, sz)
- rbuf := bytes.NewBuffer(make([]byte, sz))
- for i := 0; i < b.N; i++ {
- v.Append(wbuf)
- rbuf.Reset()
- v.ReadToWriter(rbuf, int64(sz))
- }
-}
-
-func testReadAt(t *testing.T, v *View, offset int64, n int, wantStr string, wantErr error) {
- t.Helper()
- d := make([]byte, n)
- n, err := v.ReadAt(d, offset)
- if n != len(wantStr) {
- t.Errorf("got %d, want %d", n, len(wantStr))
- }
- if err != wantErr {
- t.Errorf("got err %v, want %v", err, wantErr)
- }
- if !bytes.Equal(d[:n], []byte(wantStr)) {
- t.Errorf("got %q, want %q", string(d[:n]), wantStr)
- }
-}
-
-func TestView(t *testing.T) {
- testCases := []struct {
- name string
- input string
- output string
- op func(*testing.T, *View)
- }{
- // Preconditions.
- {
- name: "truncate-check",
- input: "hello",
- output: "hello", // Not touched.
- op: func(t *testing.T, v *View) {
- defer func() {
- if r := recover(); r == nil {
- t.Errorf("Truncate(-1) did not panic")
- }
- }()
- v.Truncate(-1)
- },
- },
- {
- name: "grow-check",
- input: "hello",
- output: "hello", // Not touched.
- op: func(t *testing.T, v *View) {
- defer func() {
- if r := recover(); r == nil {
- t.Errorf("Grow(-1) did not panic")
- }
- }()
- v.Grow(-1, false)
- },
- },
- {
- name: "advance-check",
- input: "hello",
- output: "", // Consumed.
- op: func(t *testing.T, v *View) {
- defer func() {
- if r := recover(); r == nil {
- t.Errorf("advanceRead(Size()+1) did not panic")
- }
- }()
- v.advanceRead(v.Size() + 1)
- },
- },
-
- // Prepend.
- {
- name: "prepend",
- input: "world",
- output: "hello world",
- op: func(t *testing.T, v *View) {
- v.Prepend([]byte("hello "))
- },
- },
- {
- name: "prepend-backfill-full",
- input: "hello world",
- output: "jello world",
- op: func(t *testing.T, v *View) {
- v.TrimFront(1)
- v.Prepend([]byte("j"))
- },
- },
- {
- name: "prepend-backfill-under",
- input: "hello world",
- output: "hola world",
- op: func(t *testing.T, v *View) {
- v.TrimFront(5)
- v.Prepend([]byte("hola"))
- },
- },
- {
- name: "prepend-backfill-over",
- input: "hello world",
- output: "smello world",
- op: func(t *testing.T, v *View) {
- v.TrimFront(1)
- v.Prepend([]byte("sm"))
- },
- },
- {
- name: "prepend-fill",
- input: strings.Repeat("1", bufferSize-1),
- output: "0" + strings.Repeat("1", bufferSize-1),
- op: func(t *testing.T, v *View) {
- v.Prepend([]byte("0"))
- },
- },
- {
- name: "prepend-overflow",
- input: strings.Repeat("1", bufferSize),
- output: "0" + strings.Repeat("1", bufferSize),
- op: func(t *testing.T, v *View) {
- v.Prepend([]byte("0"))
- },
- },
- {
- name: "prepend-multiple-buffers",
- input: strings.Repeat("1", bufferSize-1),
- output: strings.Repeat("0", bufferSize*3) + strings.Repeat("1", bufferSize-1),
- op: func(t *testing.T, v *View) {
- v.Prepend([]byte(strings.Repeat("0", bufferSize*3)))
- },
- },
-
- // Append and write.
- {
- name: "append",
- input: "hello",
- output: "hello world",
- op: func(t *testing.T, v *View) {
- v.Append([]byte(" world"))
- },
- },
- {
- name: "append-fill",
- input: strings.Repeat("1", bufferSize-1),
- output: strings.Repeat("1", bufferSize-1) + "0",
- op: func(t *testing.T, v *View) {
- v.Append([]byte("0"))
- },
- },
- {
- name: "append-overflow",
- input: strings.Repeat("1", bufferSize),
- output: strings.Repeat("1", bufferSize) + "0",
- op: func(t *testing.T, v *View) {
- v.Append([]byte("0"))
- },
- },
- {
- name: "append-multiple-buffers",
- input: strings.Repeat("1", bufferSize-1),
- output: strings.Repeat("1", bufferSize-1) + strings.Repeat("0", bufferSize*3),
- op: func(t *testing.T, v *View) {
- v.Append([]byte(strings.Repeat("0", bufferSize*3)))
- },
- },
-
- // AppendOwned.
- {
- name: "append-owned",
- input: "hello",
- output: "hello world",
- op: func(t *testing.T, v *View) {
- b := []byte("Xworld")
- v.AppendOwned(b)
- b[0] = ' '
- },
- },
-
- // Truncate.
- {
- name: "truncate",
- input: "hello world",
- output: "hello",
- op: func(t *testing.T, v *View) {
- v.Truncate(5)
- },
- },
- {
- name: "truncate-noop",
- input: "hello world",
- output: "hello world",
- op: func(t *testing.T, v *View) {
- v.Truncate(v.Size() + 1)
- },
- },
- {
- name: "truncate-multiple-buffers",
- input: strings.Repeat("1", bufferSize*2),
- output: strings.Repeat("1", bufferSize*2-1),
- op: func(t *testing.T, v *View) {
- v.Truncate(bufferSize*2 - 1)
- },
- },
- {
- name: "truncate-multiple-buffers-to-one",
- input: strings.Repeat("1", bufferSize*2),
- output: "11111",
- op: func(t *testing.T, v *View) {
- v.Truncate(5)
- },
- },
-
- // TrimFront.
- {
- name: "trim",
- input: "hello world",
- output: "world",
- op: func(t *testing.T, v *View) {
- v.TrimFront(6)
- },
- },
- {
- name: "trim-too-large",
- input: "hello world",
- output: "",
- op: func(t *testing.T, v *View) {
- v.TrimFront(v.Size() + 1)
- },
- },
- {
- name: "trim-multiple-buffers",
- input: strings.Repeat("1", bufferSize*2),
- output: strings.Repeat("1", bufferSize*2-1),
- op: func(t *testing.T, v *View) {
- v.TrimFront(1)
- },
- },
- {
- name: "trim-multiple-buffers-to-one-buffer",
- input: strings.Repeat("1", bufferSize*2),
- output: "1",
- op: func(t *testing.T, v *View) {
- v.TrimFront(bufferSize*2 - 1)
- },
- },
-
- // Grow.
- {
- name: "grow",
- input: "hello world",
- output: "hello world",
- op: func(t *testing.T, v *View) {
- v.Grow(1, true)
- },
- },
- {
- name: "grow-from-zero",
- output: strings.Repeat("\x00", 1024),
- op: func(t *testing.T, v *View) {
- v.Grow(1024, true)
- },
- },
- {
- name: "grow-from-non-zero",
- input: strings.Repeat("1", bufferSize),
- output: strings.Repeat("1", bufferSize) + strings.Repeat("\x00", bufferSize),
- op: func(t *testing.T, v *View) {
- v.Grow(bufferSize*2, true)
- },
- },
-
- // Copy.
- {
- name: "copy",
- input: "hello",
- output: "hello",
- op: func(t *testing.T, v *View) {
- other := v.Copy()
- bs := other.Flatten()
- want := []byte("hello")
- if !bytes.Equal(bs, want) {
- t.Errorf("expected %v, got %v", want, bs)
- }
- },
- },
- {
- name: "copy-large",
- input: strings.Repeat("1", bufferSize+1),
- output: strings.Repeat("1", bufferSize+1),
- op: func(t *testing.T, v *View) {
- other := v.Copy()
- bs := other.Flatten()
- want := []byte(strings.Repeat("1", bufferSize+1))
- if !bytes.Equal(bs, want) {
- t.Errorf("expected %v, got %v", want, bs)
- }
- },
- },
-
- // Merge.
- {
- name: "merge",
- input: "hello",
- output: "hello world",
- op: func(t *testing.T, v *View) {
- var other View
- other.Append([]byte(" world"))
- v.Merge(&other)
- if sz := other.Size(); sz != 0 {
- t.Errorf("expected 0, got %d", sz)
- }
- },
- },
- {
- name: "merge-large",
- input: strings.Repeat("1", bufferSize+1),
- output: strings.Repeat("1", bufferSize+1) + strings.Repeat("0", bufferSize+1),
- op: func(t *testing.T, v *View) {
- var other View
- other.Append([]byte(strings.Repeat("0", bufferSize+1)))
- v.Merge(&other)
- if sz := other.Size(); sz != 0 {
- t.Errorf("expected 0, got %d", sz)
- }
- },
- },
-
- // ReadAt.
- {
- name: "readat",
- input: "hello",
- output: "hello",
- op: func(t *testing.T, v *View) { testReadAt(t, v, 0, 6, "hello", io.EOF) },
- },
- {
- name: "readat-long",
- input: "hello",
- output: "hello",
- op: func(t *testing.T, v *View) { testReadAt(t, v, 0, 8, "hello", io.EOF) },
- },
- {
- name: "readat-short",
- input: "hello",
- output: "hello",
- op: func(t *testing.T, v *View) { testReadAt(t, v, 0, 3, "hel", nil) },
- },
- {
- name: "readat-offset",
- input: "hello",
- output: "hello",
- op: func(t *testing.T, v *View) { testReadAt(t, v, 2, 3, "llo", io.EOF) },
- },
- {
- name: "readat-long-offset",
- input: "hello",
- output: "hello",
- op: func(t *testing.T, v *View) { testReadAt(t, v, 2, 8, "llo", io.EOF) },
- },
- {
- name: "readat-short-offset",
- input: "hello",
- output: "hello",
- op: func(t *testing.T, v *View) { testReadAt(t, v, 2, 2, "ll", nil) },
- },
- {
- name: "readat-skip-all",
- input: "hello",
- output: "hello",
- op: func(t *testing.T, v *View) { testReadAt(t, v, bufferSize+1, 1, "", io.EOF) },
- },
- {
- name: "readat-second-buffer",
- input: strings.Repeat("0", bufferSize+1) + "12",
- output: strings.Repeat("0", bufferSize+1) + "12",
- op: func(t *testing.T, v *View) { testReadAt(t, v, bufferSize+1, 1, "1", nil) },
- },
- {
- name: "readat-second-buffer-end",
- input: strings.Repeat("0", bufferSize+1) + "12",
- output: strings.Repeat("0", bufferSize+1) + "12",
- op: func(t *testing.T, v *View) { testReadAt(t, v, bufferSize+1, 2, "12", io.EOF) },
- },
- }
-
- for _, tc := range testCases {
- for fillName, fn := range fillFuncs {
- t.Run(fillName+"/"+tc.name, func(t *testing.T) {
- // Construct & fill the view.
- var view View
- fn(&view, []byte(tc.input))
-
- // Run the operation.
- if tc.op != nil {
- tc.op(t, &view)
- }
-
- // Flatten and validate.
- out := view.Flatten()
- if !bytes.Equal([]byte(tc.output), out) {
- t.Errorf("expected %q, got %q", tc.output, string(out))
- }
-
- // Ensure the size is correct.
- if len(out) != int(view.Size()) {
- t.Errorf("size is wrong: expected %d, got %d", len(out), view.Size())
- }
-
- // Calculate contents via apply.
- var appliedOut []byte
- view.Apply(func(b []byte) {
- appliedOut = append(appliedOut, b...)
- })
- if len(appliedOut) != len(out) {
- t.Errorf("expected %d, got %d", len(out), len(appliedOut))
- }
- if !bytes.Equal(appliedOut, out) {
- t.Errorf("expected %v, got %v", out, appliedOut)
- }
-
- // Calculate contents via ReadToWriter.
- var b bytes.Buffer
- n, err := view.ReadToWriter(&b, int64(len(out)))
- if n != int64(len(out)) {
- t.Errorf("expected %d, got %d", len(out), n)
- }
- if err != nil {
- t.Errorf("expected nil, got %v", err)
- }
- if !bytes.Equal(b.Bytes(), out) {
- t.Errorf("expected %v, got %v", out, b.Bytes())
- }
- })
- }
- }
-}
-
-func TestViewPullUp(t *testing.T) {
- for _, tc := range []struct {
- desc string
- inputs []string
- offset int
- length int
- output string
- failed bool
- // lengths is the lengths of each buffer node after the pull up.
- lengths []int
- }{
- {
- desc: "whole empty view",
- },
- {
- desc: "zero pull",
- inputs: []string{"hello", " world"},
- lengths: []int{5, 6},
- },
- {
- desc: "whole view",
- inputs: []string{"hello", " world"},
- offset: 0,
- length: 11,
- output: "hello world",
- lengths: []int{11},
- },
- {
- desc: "middle to end aligned",
- inputs: []string{"0123", "45678", "9abcd"},
- offset: 4,
- length: 10,
- output: "456789abcd",
- lengths: []int{4, 10},
- },
- {
- desc: "middle to end unaligned",
- inputs: []string{"0123", "45678", "9abcd"},
- offset: 6,
- length: 8,
- output: "6789abcd",
- lengths: []int{4, 10},
- },
- {
- desc: "middle aligned",
- inputs: []string{"0123", "45678", "9abcd", "efgh"},
- offset: 6,
- length: 5,
- output: "6789a",
- lengths: []int{4, 10, 4},
- },
-
- // Failed cases.
- {
- desc: "empty view - length too long",
- offset: 0,
- length: 1,
- failed: true,
- },
- {
- desc: "empty view - offset too large",
- offset: 1,
- length: 1,
- failed: true,
- },
- {
- desc: "length too long",
- inputs: []string{"0123", "45678", "9abcd"},
- offset: 4,
- length: 100,
- failed: true,
- lengths: []int{4, 5, 5},
- },
- {
- desc: "offset too large",
- inputs: []string{"0123", "45678", "9abcd"},
- offset: 100,
- length: 1,
- failed: true,
- lengths: []int{4, 5, 5},
- },
- } {
- t.Run(tc.desc, func(t *testing.T) {
- var v View
- for _, s := range tc.inputs {
- v.AppendOwned([]byte(s))
- }
-
- got, gotOk := v.PullUp(tc.offset, tc.length)
- want, wantOk := []byte(tc.output), !tc.failed
- if gotOk != wantOk || !bytes.Equal(got, want) {
- t.Errorf("v.PullUp(%d, %d) = %q, %t; %q, %t", tc.offset, tc.length, got, gotOk, want, wantOk)
- }
-
- var gotLengths []int
- for buf := v.data.Front(); buf != nil; buf = buf.Next() {
- gotLengths = append(gotLengths, buf.ReadSize())
- }
- if !reflect.DeepEqual(gotLengths, tc.lengths) {
- t.Errorf("lengths = %v; want %v", gotLengths, tc.lengths)
- }
- })
- }
-}
-
-func TestViewRemove(t *testing.T) {
- // Success cases
- for _, tc := range []struct {
- desc string
- // before is the contents for each buffer node initially.
- before []string
- // after is the contents for each buffer node after removal.
- after []string
- offset int
- length int
- }{
- {
- desc: "empty view",
- },
- {
- desc: "nothing removed",
- before: []string{"hello", " world"},
- after: []string{"hello", " world"},
- },
- {
- desc: "whole view",
- before: []string{"hello", " world"},
- offset: 0,
- length: 11,
- },
- {
- desc: "beginning to middle aligned",
- before: []string{"0123", "45678", "9abcd"},
- after: []string{"9abcd"},
- offset: 0,
- length: 9,
- },
- {
- desc: "beginning to middle unaligned",
- before: []string{"0123", "45678", "9abcd"},
- after: []string{"678", "9abcd"},
- offset: 0,
- length: 6,
- },
- {
- desc: "middle to end aligned",
- before: []string{"0123", "45678", "9abcd"},
- after: []string{"0123"},
- offset: 4,
- length: 10,
- },
- {
- desc: "middle to end unaligned",
- before: []string{"0123", "45678", "9abcd"},
- after: []string{"0123", "45"},
- offset: 6,
- length: 8,
- },
- {
- desc: "middle aligned",
- before: []string{"0123", "45678", "9abcd"},
- after: []string{"0123", "9abcd"},
- offset: 4,
- length: 5,
- },
- {
- desc: "middle unaligned",
- before: []string{"0123", "45678", "9abcd"},
- after: []string{"0123", "4578", "9abcd"},
- offset: 6,
- length: 1,
- },
- } {
- t.Run(tc.desc, func(t *testing.T) {
- var v View
- for _, s := range tc.before {
- v.AppendOwned([]byte(s))
- }
-
- if ok := v.Remove(tc.offset, tc.length); !ok {
- t.Errorf("v.Remove(%d, %d) = false, want true", tc.offset, tc.length)
- }
-
- var got []string
- for buf := v.data.Front(); buf != nil; buf = buf.Next() {
- got = append(got, string(buf.ReadSlice()))
- }
- if !reflect.DeepEqual(got, tc.after) {
- t.Errorf("after = %v; want %v", got, tc.after)
- }
- })
- }
-
- // Failure cases
- for _, tc := range []struct {
- desc string
- // before is the contents for each buffer node initially.
- before []string
- offset int
- length int
- }{
- {
- desc: "offset out-of-range",
- before: []string{"hello", " world"},
- offset: -1,
- length: 3,
- },
- {
- desc: "length too long",
- before: []string{"hello", " world"},
- offset: 0,
- length: 12,
- },
- {
- desc: "length too long with positive offset",
- before: []string{"hello", " world"},
- offset: 3,
- length: 9,
- },
- {
- desc: "length negative",
- before: []string{"hello", " world"},
- offset: 0,
- length: -1,
- },
- } {
- t.Run(tc.desc, func(t *testing.T) {
- var v View
- for _, s := range tc.before {
- v.AppendOwned([]byte(s))
- }
- if ok := v.Remove(tc.offset, tc.length); ok {
- t.Errorf("v.Remove(%d, %d) = true, want false", tc.offset, tc.length)
- }
- })
- }
-}
-
-func TestViewSubApply(t *testing.T) {
- var v View
- v.AppendOwned([]byte("0123"))
- v.AppendOwned([]byte("45678"))
- v.AppendOwned([]byte("9abcd"))
-
- data := []byte("0123456789abcd")
-
- for i := 0; i <= len(data); i++ {
- for j := i; j <= len(data); j++ {
- t.Run(fmt.Sprintf("SubApply(%d,%d)", i, j), func(t *testing.T) {
- var got []byte
- v.SubApply(i, j-i, func(b []byte) {
- got = append(got, b...)
- })
- if want := data[i:j]; !bytes.Equal(got, want) {
- t.Errorf("got = %q; want %q", got, want)
- }
- })
- }
- }
-}
-
-func doSaveAndLoad(t *testing.T, toSave, toLoad *View) {
- t.Helper()
- var buf bytes.Buffer
- ctx := context.Background()
- if _, err := state.Save(ctx, &buf, toSave); err != nil {
- t.Fatal("state.Save:", err)
- }
- if _, err := state.Load(ctx, bytes.NewReader(buf.Bytes()), toLoad); err != nil {
- t.Fatal("state.Load:", err)
- }
-}
-
-func TestSaveRestoreViewEmpty(t *testing.T) {
- var toSave View
- var v View
- doSaveAndLoad(t, &toSave, &v)
-
- if got := v.pool.avail; got != nil {
- t.Errorf("pool is not in zero state: v.pool.avail = %v, want nil", got)
- }
- if got := v.Flatten(); len(got) != 0 {
- t.Errorf("v.Flatten() = %x, want []", got)
- }
-}
-
-func TestSaveRestoreView(t *testing.T) {
- // Create data that fits 2.5 slots.
- data := bytes.Join([][]byte{
- bytes.Repeat([]byte{1, 2}, defaultBufferSize),
- bytes.Repeat([]byte{3}, defaultBufferSize/2),
- }, nil)
-
- var toSave View
- toSave.Append(data)
-
- var v View
- doSaveAndLoad(t, &toSave, &v)
-
- // Next available slot at index 3; 0-2 slot are used.
- i := 3
- if got, want := &v.pool.avail[0], &v.pool.embeddedStorage[i]; got != want {
- t.Errorf("next available buffer points to %p, want %p (&v.pool.embeddedStorage[%d])", got, want, i)
- }
- if got := v.Flatten(); !bytes.Equal(got, data) {
- t.Errorf("v.Flatten() = %x, want %x", got, data)
- }
-}
-
-func TestRangeIntersect(t *testing.T) {
- for _, tc := range []struct {
- desc string
- x, y, want Range
- }{
- {
- desc: "empty intersects empty",
- },
- {
- desc: "empty intersection",
- x: Range{end: 10},
- y: Range{begin: 10, end: 20},
- },
- {
- desc: "some intersection",
- x: Range{begin: 5, end: 20},
- y: Range{end: 10},
- want: Range{begin: 5, end: 10},
- },
- } {
- t.Run(tc.desc, func(t *testing.T) {
- if got := tc.x.Intersect(tc.y); got != tc.want {
- t.Errorf("(%#v).Intersect(%#v) = %#v; want %#v", tc.x, tc.y, got, tc.want)
- }
- if got := tc.y.Intersect(tc.x); got != tc.want {
- t.Errorf("(%#v).Intersect(%#v) = %#v; want %#v", tc.y, tc.x, got, tc.want)
- }
- })
- }
-}
-
-func TestRangeOffset(t *testing.T) {
- for _, tc := range []struct {
- input Range
- offset int
- output Range
- }{
- {
- input: Range{},
- offset: 0,
- output: Range{},
- },
- {
- input: Range{},
- offset: -1,
- output: Range{begin: -1, end: -1},
- },
- {
- input: Range{begin: 10, end: 20},
- offset: -1,
- output: Range{begin: 9, end: 19},
- },
- {
- input: Range{begin: 10, end: 20},
- offset: 2,
- output: Range{begin: 12, end: 22},
- },
- } {
- if got := tc.input.Offset(tc.offset); got != tc.output {
- t.Errorf("(%#v).Offset(%d) = %#v, want %#v", tc.input, tc.offset, got, tc.output)
- }
- }
-}
-
-func TestRangeLen(t *testing.T) {
- for _, tc := range []struct {
- r Range
- want int
- }{
- {r: Range{}, want: 0},
- {r: Range{begin: 1, end: 1}, want: 0},
- {r: Range{begin: -1, end: -1}, want: 0},
- {r: Range{end: 10}, want: 10},
- {r: Range{begin: 5, end: 10}, want: 5},
- } {
- if got := tc.r.Len(); got != tc.want {
- t.Errorf("(%#v).Len() = %d, want %d", tc.r, got, tc.want)
- }
- }
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 06:59:07 +0000