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dbb09a52a8
These functions can make it easier to to update a style's contrast when viewed against light and dark backgrounds. See #353. Also avoid a segfault when Get is called on a StyleBuilder that was created using NewStyleBuilder (as opposed to Style.Builder).
104 lines
3.4 KiB
Go
104 lines
3.4 KiB
Go
package chroma
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestStyleInherit(t *testing.T) {
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s, err := NewStyle("test", StyleEntries{
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Name: "bold #f00",
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NameVariable: "#fff",
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})
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assert.NoError(t, err)
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assert.Equal(t, StyleEntry{Colour: 0x1000000, Bold: Yes}, s.Get(NameVariable))
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}
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func TestStyleColours(t *testing.T) {
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s, err := NewStyle("test", StyleEntries{
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Name: "#f00 bg:#001 border:#ansiblue",
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})
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assert.NoError(t, err)
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assert.Equal(t, StyleEntry{Colour: 0xff0001, Background: 0x000012, Border: 0x000100}, s.Get(Name))
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}
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func TestStyleClone(t *testing.T) {
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parent, err := NewStyle("test", StyleEntries{
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Background: "bg:#ffffff",
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})
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assert.NoError(t, err)
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clone, err := parent.Builder().Add(Comment, "#0f0").Build()
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assert.NoError(t, err)
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assert.Equal(t, "bg:#ffffff", clone.Get(Background).String())
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assert.Equal(t, "#00ff00 bg:#ffffff", clone.Get(Comment).String())
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assert.Equal(t, "bg:#ffffff", parent.Get(Comment).String())
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}
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func TestSynthesisedStyleEntries(t *testing.T) {
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style, err := NewStyle("test", StyleEntries{
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Background: "bg:#ffffff",
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})
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assert.NoError(t, err)
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assert.True(t, style.Has(LineHighlight))
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assert.True(t, style.Has(LineNumbersTable))
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assert.True(t, style.Has(LineNumbers))
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assert.Equal(t, "bg:#e5e5e5", style.Get(LineHighlight).String())
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assert.Equal(t, "#7f7f7f bg:#ffffff", style.Get(LineNumbers).String())
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assert.Equal(t, "#7f7f7f bg:#ffffff", style.Get(LineNumbersTable).String())
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}
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func TestSynthesisedStyleClone(t *testing.T) {
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style, err := NewStyle("test", StyleEntries{
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Background: "bg:#ffffff",
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LineHighlight: "bg:#ffffff",
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LineNumbers: "bg:#fffff1",
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})
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assert.NoError(t, err)
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style, err = style.Builder().Build()
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assert.NoError(t, err)
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assert.True(t, style.Has(LineHighlight))
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assert.True(t, style.Has(LineNumbers))
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assert.Equal(t, "bg:#ffffff", style.Get(LineHighlight).String())
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assert.Equal(t, "bg:#fffff1", style.Get(LineNumbers).String())
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}
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func TestStyleBuilderTransform(t *testing.T) {
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orig, err := NewStyle("test", StyleEntries{
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Name: "#000",
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NameVariable: "bold #f00",
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})
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assert.NoError(t, err)
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// Derive a style that inherits entries from orig.
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builder := orig.Builder()
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builder.Add(NameVariableGlobal, "#f30")
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deriv, err := builder.Build()
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assert.NoError(t, err)
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// Use Transform to brighten or darken all of the colours in the derived style.
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light, err := deriv.Builder().Transform(func(se StyleEntry) StyleEntry {
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se.Colour = se.Colour.ClampBrightness(0.9, 1)
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return se
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}).Build()
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assert.Nilf(t, err, "Transform failed: %v", err)
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assert.GreaterOrEqual(t, light.Get(Name).Colour.Brightness(), 0.89)
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assert.GreaterOrEqual(t, light.Get(NameVariable).Colour.Brightness(), 0.89)
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assert.GreaterOrEqual(t, light.Get(NameVariableGlobal).Colour.Brightness(), 0.89)
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dark, err := deriv.Builder().Transform(func(se StyleEntry) StyleEntry {
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se.Colour = se.Colour.ClampBrightness(0, 0.1)
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return se
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}).Build()
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assert.Nilf(t, err, "Transform failed: %v", err)
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assert.LessOrEqual(t, dark.Get(Name).Colour.Brightness(), 0.11)
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assert.LessOrEqual(t, dark.Get(NameVariable).Colour.Brightness(), 0.11)
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assert.LessOrEqual(t, dark.Get(NameVariableGlobal).Colour.Brightness(), 0.11)
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// The original styles should be unchanged.
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assert.Equal(t, "#000000", orig.Get(Name).Colour.String())
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assert.Equal(t, "#ff0000", orig.Get(NameVariable).Colour.String())
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assert.Equal(t, "#ff3300", deriv.Get(NameVariableGlobal).Colour.String())
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}
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