go-chart/text_test.go

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package chart
import (
"testing"
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assert "github.com/blend/go-sdk/assert"
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)
func TestTextWrapWord(t *testing.T) {
assert := assert.New(t)
r, err := PNG(1024, 1024)
assert.Nil(err)
f, err := GetDefaultFont()
assert.Nil(err)
basicTextStyle := Style{Font: f, FontSize: 24}
output := Text.WrapFitWord(r, "this is a test string", 100, basicTextStyle)
assert.NotEmpty(output)
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assert.Len(3, output)
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for _, line := range output {
basicTextStyle.WriteToRenderer(r)
lineBox := r.MeasureText(line)
assert.True(lineBox.Width() < 100, line+": "+lineBox.String())
}
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assert.Equal("this is", output[0])
assert.Equal("a test", output[1])
assert.Equal("string", output[2])
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output = Text.WrapFitWord(r, "foo", 100, basicTextStyle)
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assert.Len(1, output)
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assert.Equal("foo", output[0])
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// test that it handles newlines.
output = Text.WrapFitWord(r, "this\nis\na\ntest\nstring", 100, basicTextStyle)
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assert.Len(5, output)
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// test that it handles newlines and long lines.
output = Text.WrapFitWord(r, "this\nis\na\ntest\nstring that is very long", 100, basicTextStyle)
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assert.Len(8, output)
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}
func TestTextWrapRune(t *testing.T) {
assert := assert.New(t)
r, err := PNG(1024, 1024)
assert.Nil(err)
f, err := GetDefaultFont()
assert.Nil(err)
basicTextStyle := Style{Font: f, FontSize: 24}
output := Text.WrapFitRune(r, "this is a test string", 150, basicTextStyle)
assert.NotEmpty(output)
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assert.Len(2, output)
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assert.Equal("this is a t", output[0])
assert.Equal("est string", output[1])
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}