feat: support line chart draw function

bar_test.go

@@ -0,0 +1,78 @@
+// MIT License
+
+// Copyright (c) 2022 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 TestBarStyle(t *testing.T) {
+	assert := assert.New(t)
+
+	bs := BarStyle{
+		ClassName: "test",
+		StrokeDashArray: []float64{
+			1.0,
+		},
+		FillColor: drawing.ColorBlack,
+	}
+
+	assert.Equal(chart.Style{
+		ClassName: "test",
+		StrokeDashArray: []float64{
+			1.0,
+		},
+		StrokeWidth: 1,
+		FillColor:   drawing.ColorBlack,
+		StrokeColor: drawing.ColorBlack,
+	}, bs.Style())
+}
+
+func TestDrawBar(t *testing.T) {
+	assert := assert.New(t)
+	d, err := NewDraw(DrawOption{
+		Width:  400,
+		Height: 300,
+	}, PaddingOption(chart.Box{
+		Left:   10,
+		Top:    20,
+		Right:  30,
+		Bottom: 40,
+	}))
+	assert.Nil(err)
+	d.Bar(chart.Box{
+		Left:   0,
+		Top:    0,
+		Right:  20,
+		Bottom: 200,
+	}, BarStyle{
+		FillColor: drawing.ColorBlack,
+	})
+	data, err := d.Bytes()
+	assert.Nil(err)
+	assert.Equal("<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" width=\"400\" height=\"300\">\\n<path  d=\"M 10 20\nL 30 20\nL 30 220\nL 10 220\nL 10 20\" style=\"stroke-width:1;stroke:rgba(0,0,0,1.0);fill:rgba(0,0,0,1.0)\"/></svg>", string(data))
+}