mirror of https://github.com/mum4k/termdash.git
Adding a type that holds data in the text input field.
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// Copyright 2019 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package textinput
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// editor.go contains data types that edit the content of the text input field.
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import (
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"bytes"
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)
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// fieldData are the data currently present inside the text input field.
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type fieldData []rune
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// String implements fmt.Stringer.
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func (fd fieldData) String() string {
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var b bytes.Buffer
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for _, r := range fd {
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b.WriteRune(r)
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}
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return b.String()
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}
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// insertAt inserts rune at the specified index.
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func (fd *fieldData) insertAt(idx int, r rune) {
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*fd = append(
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(*fd)[:idx],
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append(fieldData{r}, (*fd)[idx:]...)...,
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)
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}
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// deleteAt deletes rune at the specified index.
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func (fd *fieldData) deleteAt(idx int) {
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*fd = append((*fd)[:idx], (*fd)[idx+1:]...)
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}
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@ -0,0 +1,96 @@
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// Copyright 2019 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package textinput
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import (
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"fmt"
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"testing"
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"github.com/kylelemons/godebug/pretty"
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)
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func TestData(t *testing.T) {
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tests := []struct {
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desc string
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data fieldData
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ops func(*fieldData)
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want fieldData
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}{
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{
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desc: "appends to empty data",
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ops: func(fd *fieldData) {
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fd.insertAt(0, 'a')
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},
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want: fieldData{'a'},
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},
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{
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desc: "appends at the end of non-empty data",
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data: fieldData{'a'},
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ops: func(fd *fieldData) {
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fd.insertAt(1, 'b')
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fd.insertAt(2, 'c')
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},
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want: fieldData{'a', 'b', 'c'},
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},
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{
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desc: "appends at the beginning of non-empty data",
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data: fieldData{'a'},
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ops: func(fd *fieldData) {
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fd.insertAt(0, 'b')
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fd.insertAt(0, 'c')
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},
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want: fieldData{'c', 'b', 'a'},
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},
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{
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desc: "deletes the last rune, result in empty",
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data: fieldData{'a'},
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ops: func(fd *fieldData) {
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fd.deleteAt(0)
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},
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want: fieldData{},
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},
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{
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desc: "deletes the last rune, result in non-empty",
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data: fieldData{'a', 'b'},
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ops: func(fd *fieldData) {
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fd.deleteAt(1)
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},
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want: fieldData{'a'},
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},
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{
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desc: "deletes runes in the middle",
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data: fieldData{'a', 'b', 'c', 'd'},
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ops: func(fd *fieldData) {
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fd.deleteAt(1)
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fd.deleteAt(1)
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},
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want: fieldData{'a', 'd'},
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},
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}
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for _, tc := range tests {
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t.Run(tc.desc, func(t *testing.T) {
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got := tc.data
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if tc.ops != nil {
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tc.ops(&got)
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}
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t.Logf(fmt.Sprintf("got: %s", got))
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if diff := pretty.Compare(tc.want, got); diff != "" {
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t.Errorf("fieldData => unexpected diff (-want, +got):\n%s\n got: %q\nwant: %q", diff, got, tc.want)
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}
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})
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}
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}
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