You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: alignfor_test.go
    path of file: ./repos/termdash/private/alignfor
    
    the code of the file until where you have to start completion: // Copyright 2018 Google Inc.
//
// 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 alignfor

import (
	"image"
	"testing"

	"github.com/kylelemons/godebug/pretty"
	"github.com/mum4k/termdash/align"
)

func TestRectangle(t *testing.T) {
	tests := []struct {
		desc    string
		rect    image.Rectangle
		area    image.Rectangle
		hAlign  align.Horizontal
		vAlign  align.Vertical
		want    image.Rectangle
		wantErr bool
	}{
		{
			desc:    "area falls outside of the rectangle",
			rect:    image.Rect(0, 0, 1, 1),
			area:    image.Rect(1, 1, 2, 2),
			hAlign:  align.HorizontalLeft,
			vAlign:  align.VerticalTop,
			wantErr: true,
		},
		{
			desc:    "unsupported horizontal alignment",
			rect:    image.Rect(0, 0, 2, 2),
			area:    image.Rect(0, 0, 1, 1),
			hAlign:  align.Horizontal(-1),
			vAlign:  align.VerticalTop,
			wantErr: true,
		},
		{
			desc:    "unsupported vertical alignment",
			rect:    image.Rect(0, 0, 2, 2),
			area:    image.Rect(0, 0, 1, 1),
			hAlign:  align.HorizontalLeft,
			vAlign:  align.Vertical(-1),
			wantErr: true,
		},
		{
			desc:   "nothing to align if the rectangles are equal",
			rect:   image.Rect(0, 0, 2, 2),
			area:   image.Rect(0, 0, 2, 2),
			hAlign: align.HorizontalLeft,
			vAlign: align.VerticalTop,
			want:   image.Rect(0, 0, 2, 2),
		},
		{
			desc:   "aligns top and left, area is zero based",
			rect:   image.Rect(0, 0, 3, 3),
			area:   image.Rect(0, 0, 1, 1),
			hAlign: align.HorizontalLeft,
			vAlign: align.VerticalTop,
			want:   image.Rect(0, 0, 1, 1),
		},
		{
			desc:   "aligns top and center, area is zero based",
			rect:   image.Rect(0, 0, 3, 3),
			area:   image.Rect(0, 0, 1, 1),
			hAlign: align.HorizontalCenter,
			vAlign: align.VerticalTop,
			want:   image.Rect(1, 0, 2, 1),
		},
		{
			desc:   "aligns top and right, area is zero based",
			rect:   image.Rect(0, 0, 3, 3),
			area:   image.Rect(0, 0, 1, 1),
			hAlign: align.HorizontalRight,
			vAlign: align.VerticalTop,
			want:   image.Rect(2, 0, 3, 1),
		},
		{
			desc:   "aligns middle and left, area is zero based",
			rect:   image.Rect(0, 0, 3, 3),
			area:   image.Rect(0, 0, 1, 1),
			hAlign: align.HorizontalLeft,
			vAlign: align.VerticalMiddle,
			want:   image.Rect(0, 1, 1, 2),
		},
		{
			desc:   "aligns middle and center, area is zero based",
			rect:   image.Rect(0, 0, 3, 3),
			area:   image.Rect(0, 0, 1, 1),
			hAlign: align.HorizontalCenter,
			vAlign: align.VerticalMiddle,
			want:   image.Rect(1, 1, 2, 2),

    
func TestText(t *testing.T) {
	tests := []struct {
		desc    string
		rect    image.Rectangle
		text    string
		hAlign  align.Horizontal
		vAlign  align.Vertical
		want    image.Point
		wantErr bool
	}{
		{
			desc:    "fails when text contains newline",
			rect:    image.Rect(0, 0, 3, 3),
			text:    "a\nb",
			wantErr: true,
		},
		{
			desc:    "fails when text contains non-printable characters",
			rect:    image.Rect(0, 0, 3, 3),
			text:    "a\tb",
			wantErr: true,
		},
		{
			desc:   "aligns text top and left",
			rect:   image.Rect(1, 1, 4, 4),
			text:   "a",
			hAlign: align.HorizontalLeft,
			vAlign: align.VerticalTop,
			want:   image.Point{1, 1},
		},
		{
			desc:   "aligns text top and center",
			rect:   image.Rect(1, 1, 4, 4),
			text:   "a",
			hAlign: align.HorizontalCenter,
			vAlign: align.VerticalTop,
			want:   image.Point{2, 1},
		},
		{
			desc:   "aligns text top and right",
			rect:   image.Rect(1, 1, 4, 4),
			text:   "a",
			hAlign: align.HorizontalRight,
			vAlign: align.VerticalTop,
			want:   image.Point{3, 1},
		},
		{
			desc:   "aligns text middle and left",
			rect:   image.Rect(1, 1, 4, 4),
			text:   "a",
			hAlign: align.HorizontalLeft,
			vAlign: align.VerticalMiddle,
			want:   image.Point{1, 2},
		},
		{
			desc:   "aligns half-width text rune middle and center",
			rect:   image.Rect(1, 1, 4, 4),
			text:   "a",
			hAlign: align.HorizontalCenter,
			vAlign: align.VerticalMiddle,
			want:   image.Point{2, 2},
		},
		{
			desc:   "aligns full-width text rune middle and center",
			rect:   image.Rect(1, 1, 4, 4),
			text:   "ç•Œ",
			hAlign: align.HorizontalCenter,
			vAlign: align.VerticalMiddle,
			want:   image.Point{1, 2},
		},
		{
			desc:   "aligns text middle and right",
			rect:   image.Rect(1, 1, 4, 4),
			text:   "a",
			hAlign: align.HorizontalRight,
			vAlign: align.VerticalMiddle,
			want:   image.Point{3, 2},
		},
		{
			desc:   "aligns text bottom and left",
			rect:   image.Rect(1, 1, 4, 4),
			text:   "a",
			hAlign: align.HorizontalLeft,
			vAlign: align.VerticalBottom,
			want:   image.Point{1, 3},
		},
		{
			desc:   "aligns text bottom and center",
			rect:   image.Rect(1, 1, 4, 4),
			text:   "a",
			hAlign: align.HorizontalCenter,
			vAlign: align.VerticalBottom,
			want:   image.Point{2, 3},
		},
		{
			desc:   "aligns text bottom and right",
			rect:   image.Rect(1, 1, 4, 4),
			text:   "a",
			hAlign: align.HorizontalRight,
			vAlign: align.VerticalBottom,
			want:   image.Point{3, 3},
		},
		{
			desc:   "aligns text that is too long, assumes trimming",
			rect:   image.Rect(1, 1, 4, 4),
			text:   "abcd",
			hAlign: align.HorizontalCenter,
			vAlign: align.VerticalTop,
			want:   image.Point{1, 1},
		},
	}

	for _, tc := range tests {
		t.Run(tc.desc, func(t *testing.T) {
			got, err := Text(tc.rect, tc.text, tc.hAlign, tc.vAlign)
			if (err != nil) != tc.wantErr {
				t.Errorf("Text => unexpected error: %v, wantErr: %v", err, tc.wantErr)
			}
			if err != nil {
				return
			}

			if diff := pretty.Compare(tc.want, got); diff != "" {
				t.Errorf("Text => unexpected diff (-want, +got):\n%s", diff)
			}
		})
	}
}