plan9font_test.go

Documentation: golang.org/x/image/font/plan9font

     1  // Copyright 2016 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package plan9font
     6  
     7  import (
     8  	"image"
     9  	"io/ioutil"
    10  	"path"
    11  	"path/filepath"
    12  	"testing"
    13  
    14  	"golang.org/x/image/font"
    15  )
    16  
    17  func TestMetrics(t *testing.T) {
    18  	readFile := func(name string) ([]byte, error) {
    19  		return ioutil.ReadFile(filepath.FromSlash(path.Join("../testdata/fixed", name)))
    20  	}
    21  	data, err := readFile("unicode.7x13.font")
    22  	if err != nil {
    23  		t.Fatal(err)
    24  	}
    25  	face, err := ParseFont(data, readFile)
    26  	if err != nil {
    27  		t.Fatal(err)
    28  	}
    29  	want := font.Metrics{Height: 832, Ascent: 704, Descent: 128, XHeight: 704, CapHeight: 704,
    30  		CaretSlope: image.Point{X: 0, Y: 1}}
    31  	if got := face.Metrics(); got != want {
    32  		t.Errorf("unicode.7x13.font: Metrics: got %v, want %v", got, want)
    33  	}
    34  	subData, err := readFile("7x13.0000")
    35  	if err != nil {
    36  		t.Fatal(err)
    37  	}
    38  	subFace, err := ParseSubfont(subData, 0)
    39  	if err != nil {
    40  		t.Fatal(err)
    41  	}
    42  	if got := subFace.Metrics(); got != want {
    43  		t.Errorf("7x13.0000: Metrics: got %v, want %v", got, want)
    44  	}
    45  }
    46  
    47  func BenchmarkParseSubfont(b *testing.B) {
    48  	subfontData, err := ioutil.ReadFile(filepath.FromSlash("../testdata/fixed/7x13.0000"))
    49  	if err != nil {
    50  		b.Fatal(err)
    51  	}
    52  	b.ResetTimer()
    53  	for i := 0; i < b.N; i++ {
    54  		if _, err := ParseSubfont(subfontData, 0); err != nil {
    55  			b.Fatal(err)
    56  		}
    57  	}
    58  }
    59
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