test: add test for legend, series and theme

theme_test.go

@@ -0,0 +1,122 @@
+// MIT License
+
+// Copyright (c) 2021 Tree Xie
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+package charts
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/wcharczuk/go-chart/v2"
+	"github.com/wcharczuk/go-chart/v2/drawing"
+)
+
+func TestThemeColors(t *testing.T) {
+	assert := assert.New(t)
+
+	assert.Equal(AxisColorDark, getAxisColor(ThemeDark))
+	assert.Equal(AxisColorLight, getAxisColor(""))
+
+	assert.Equal(GridColorDark, getGridColor(ThemeDark))
+	assert.Equal(GridColorLight, getGridColor(""))
+
+	assert.Equal(BackgroundColorDark, getBackgroundColor(ThemeDark))
+	assert.Equal(chart.DefaultBackgroundColor, getBackgroundColor(""))
+
+	assert.Equal(TextColorDark, getTextColor(ThemeDark))
+	assert.Equal(chart.DefaultTextColor, getTextColor(""))
+}
+
+func TestThemeColorPalette(t *testing.T) {
+	assert := assert.New(t)
+
+	dark := ThemeColorPalette{
+		Theme: ThemeDark,
+	}
+	assert.Equal(BackgroundColorDark, dark.BackgroundColor())
+	assert.Equal(chart.DefaultBackgroundStrokeColor, dark.BackgroundStrokeColor())
+	assert.Equal(BackgroundColorDark, dark.CanvasColor())
+	assert.Equal(chart.DefaultCanvasStrokeColor, dark.CanvasStrokeColor())
+	assert.Equal(BackgroundColorDark, dark.AxisStrokeColor())
+	assert.Equal(TextColorDark, dark.TextColor())
+	// series 使用统一的color
+	assert.Equal(SeriesColorsLight[0], dark.GetSeriesColor(0))
+
+	light := ThemeColorPalette{}
+	assert.Equal(chart.DefaultBackgroundColor, light.BackgroundColor())
+	assert.Equal(chart.DefaultBackgroundStrokeColor, light.BackgroundStrokeColor())
+	assert.Equal(chart.DefaultCanvasColor, light.CanvasColor())
+	assert.Equal(chart.DefaultCanvasStrokeColor, light.CanvasStrokeColor())
+	assert.Equal(chart.DefaultAxisColor, light.AxisStrokeColor())
+	assert.Equal(chart.DefaultTextColor, light.TextColor())
+	// series 使用统一的color
+	assert.Equal(SeriesColorsLight[0], light.GetSeriesColor(0))
+}
+
+func TestPieThemeColorPalette(t *testing.T) {
+	assert := assert.New(t)
+	p := PieThemeColorPalette{}
+
+	// pie无认哪种theme，文本的颜色都一样
+	assert.Equal(chart.DefaultTextColor, p.TextColor())
+	p.Theme = ThemeDark
+	assert.Equal(chart.DefaultTextColor, p.TextColor())
+}
+
+func TestParseColor(t *testing.T) {
+	assert := assert.New(t)
+
+	c := parseColor("")
+	assert.True(c.IsZero())
+
+	c = parseColor("#333")
+	assert.Equal(drawing.Color{
+		R: 51,
+		G: 51,
+		B: 51,
+		A: 255,
+	}, c)
+
+	c = parseColor("#313233")
+	assert.Equal(drawing.Color{
+		R: 49,
+		G: 50,
+		B: 51,
+		A: 255,
+	}, c)
+
+	c = parseColor("rgb(31,32,33)")
+	assert.Equal(drawing.Color{
+		R: 31,
+		G: 32,
+		B: 33,
+		A: 255,
+	}, c)
+
+	c = parseColor("rgba(50,51,52,250)")
+	assert.Equal(drawing.Color{
+		R: 50,
+		G: 51,
+		B: 52,
+		A: 250,
+	}, c)
+}