piechart_test.gno

 1package piechart
 2
 3import (
 4	"strings"
 5	"testing"
 6)
 7
 8func TestRender(t *testing.T) {
 9	title := "Test"
10	slices := []PieSlice{
11		{Value: 10, Color: "#00FF00", Label: "Green"},
12		{Value: 20, Color: "#FFFF00", Label: "Yellow"},
13		{Value: 30, Color: "#FF0000", Label: "Red"},
14	}
15
16	result := Render(slices, title)
17
18	// Check if the result contains the expected image SVG structure
19	if !strings.Contains(result, "data:image/svg+xml;base64,") {
20		t.Errorf("Expected result to contain data:image/svg+xml;base64, got %s", result)
21	}
22
23	// Check if the result contains the title
24	if !strings.Contains(result, title) {
25		t.Errorf("SVG does not contain the title %q", title)
26	}
27
28	// Check if the result contains non-empty slices
29	emptySlices := []PieSlice{}
30	emptyResult := Render(emptySlices, title)
31	expectedErr := "\npiechart fails: no data provided"
32	if emptyResult != expectedErr {
33		t.Errorf("Expected exact error for empty slices: %q, got %q", expectedErr, emptyResult)
34	}
35}