121 lines
3.4 KiB
Go
121 lines
3.4 KiB
Go
package textmeasure_test
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import (
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"fmt"
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"strings"
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"testing"
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"github.com/stretchr/testify/assert"
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"oss.terrastruct.com/d2/d2renderers/d2fonts"
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"oss.terrastruct.com/d2/lib/textmeasure"
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)
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var txts = []string{
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"Jesus is my POSTMASTER GENERAL ...",
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"Don't let go of what you've got hold of, until you have hold of something else.",
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"To get something clean, one has to get something dirty.",
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"The notes blatted skyward as they rose over the Canada geese, feathered",
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"There is no such thing as a problem without a gift for you in its hands.",
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"Baseball is a skilled game. It's America's game - it, and high taxes.",
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"He is truly wise who gains wisdom from another's mishap.",
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"If you have never been hated by your child, you have never been a parent.",
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"Your only obligation in any lifetime is to be true to yourself. Being",
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"The computing field is always in need of new cliches.",
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}
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func TestTextMeasure(t *testing.T) {
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ruler, err := textmeasure.NewRuler()
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if err != nil {
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t.Fatal(err)
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}
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// For a set of random strings, test each char increases width but not height
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for _, txt := range txts {
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txt = strings.ReplaceAll(txt, " ", "")
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for i := 1; i < len(txt)-1; i++ {
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w1, h1 := ruler.Measure(d2fonts.SourceSansPro.Font(d2fonts.FONT_SIZE_M, d2fonts.FONT_STYLE_REGULAR), txt[:i])
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w2, h2 := ruler.Measure(d2fonts.SourceSansPro.Font(d2fonts.FONT_SIZE_M, d2fonts.FONT_STYLE_REGULAR), txt[:i+1])
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assert.Equal(t, h1, h2)
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assert.Less(t, w1, w2, fmt.Sprintf(`"%s" vs "%s"`, txt[:i], txt[:i+1]))
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}
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}
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// For a set of random strings, test that adding newlines increases height each time
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for _, txt := range txts {
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whitespaces := strings.Count(txt, " ")
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for i := 0; i < whitespaces-1; i++ {
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txt1 := strings.Replace(txt, " ", "\n", i)
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txt2 := strings.Replace(txt, " ", "\n", i+1)
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w1, h1 := ruler.Measure(d2fonts.SourceSansPro.Font(d2fonts.FONT_SIZE_M, d2fonts.FONT_STYLE_REGULAR), txt1)
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w2, h2 := ruler.Measure(d2fonts.SourceSansPro.Font(d2fonts.FONT_SIZE_M, d2fonts.FONT_STYLE_REGULAR), txt2)
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assert.Less(t, h1, h2)
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assert.Less(t, w2, w1)
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}
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}
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}
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func TestFontMeasure(t *testing.T) {
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ruler, err := textmeasure.NewRuler()
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if err != nil {
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t.Fatal(err)
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}
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// For a set of random strings, test that font sizes are strictly increasing
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for _, txt := range txts {
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for i := 0; i < len(d2fonts.FontSizes)-1; i++ {
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w1, h1 := ruler.Measure(d2fonts.SourceSansPro.Font(d2fonts.FontSizes[i], d2fonts.FONT_STYLE_REGULAR), txt)
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w2, h2 := ruler.Measure(d2fonts.SourceSansPro.Font(d2fonts.FontSizes[i+1], d2fonts.FONT_STYLE_REGULAR), txt)
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assert.Less(t, h1, h2)
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assert.Less(t, w1, w2)
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}
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}
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}
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type dimensions struct {
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width, height int
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}
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var mdTexts = map[string]dimensions{
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`
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- [Overview](#overview) ok _this is all measured_
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`: {245, 24},
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`
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_italics are all measured correctly_
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`: {214, 24},
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`
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**bold is measured correctly**
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`: {188, 24},
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`
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**Note:** This document
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`: {143, 24},
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`
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**Note:**
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`: {39, 24},
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`a`: {9, 24},
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`w`: {12, 24},
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`ww`: {24, 24},
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"`inline code`": {103, 24},
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"`code`": {46, 24},
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"`a`": {21, 24},
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}
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func TestTextMeasureMarkdown(t *testing.T) {
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ruler, err := textmeasure.NewRuler()
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if err != nil {
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t.Fatal(err)
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}
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for text, dims := range mdTexts {
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width, height, err := textmeasure.MeasureMarkdown(text, ruler)
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if err != nil {
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t.Fatal(err)
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}
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assert.Equal(t, dims.width, width, text)
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assert.Equal(t, dims.height, height, text)
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}
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}
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