Initial backend repository commit.

Set up project files and add .gitignore to exclude local build/runtime artifacts.

Made-with: Cursor

internal/pkg/avatar/avatar_test.go

@@ -0,0 +1,118 @@
+package avatar
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestGetInitials(t *testing.T) {
+	tests := []struct {
+		name     string
+		username string
+		want     string
+	}{
+		{"中文用户名", "张三", "张"},
+		{"英文用户名", "John", "J"},
+		{"英文全名", "John Doe", "JD"},
+		{"带下划线", "john_doe", "JD"},
+		{"带连字符", "john-doe", "JD"},
+		{"空字符串", "", "?"},
+		{"小写英文", "alice", "A"},
+		{"中文复合", "李小龙", "李"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := getInitials(tt.username)
+			if got != tt.want {
+				t.Errorf("getInitials(%q) = %q, want %q", tt.username, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestStringToColor(t *testing.T) {
+	// 测试同一用户名生成的颜色一致
+	color1 := stringToColor("张三")
+	color2 := stringToColor("张三")
+	if color1 != color2 {
+		t.Errorf("stringToColor should return consistent colors for the same input")
+	}
+
+	// 测试不同用户名生成不同颜色（大概率）
+	color3 := stringToColor("李四")
+	if color1 == color3 {
+		t.Logf("Warning: different usernames generated the same color (possible but unlikely)")
+	}
+
+	// 测试空字符串
+	color4 := stringToColor("")
+	if color4 == "" {
+		t.Errorf("stringToColor should return a color for empty string")
+	}
+
+	// 验证颜色格式
+	if !strings.HasPrefix(color4, "#") {
+		t.Errorf("stringToColor should return hex color format starting with #")
+	}
+}
+
+func TestGenerateSVGAvatar(t *testing.T) {
+	svg := GenerateSVGAvatar("张三", 100)
+
+	// 验证SVG结构
+	if !strings.Contains(svg, "<svg") {
+		t.Errorf("SVG should contain <svg tag")
+	}
+	if !strings.Contains(svg, "</svg>") {
+		t.Errorf("SVG should contain </svg> tag")
+	}
+	if !strings.Contains(svg, "width=\"100\"") {
+		t.Errorf("SVG should have width=100")
+	}
+	if !strings.Contains(svg, "height=\"100\"") {
+		t.Errorf("SVG should have height=100")
+	}
+	if !strings.Contains(svg, "张") {
+		t.Errorf("SVG should contain the initial character")
+	}
+}
+
+func TestGenerateAvatarDataURI(t *testing.T) {
+	dataURI := GenerateAvatarDataURI("张三", 100)
+
+	// 验证Data URI格式
+	if !strings.HasPrefix(dataURI, "data:image/svg+xml;base64,") {
+		t.Errorf("Data URI should start with data:image/svg+xml;base64,")
+	}
+
+	// 验证base64部分不为空
+	parts := strings.Split(dataURI, ",")
+	if len(parts) != 2 {
+		t.Errorf("Data URI should have two parts separated by comma")
+	}
+	if parts[1] == "" {
+		t.Errorf("Base64 part should not be empty")
+	}
+}
+
+func TestIsChinese(t *testing.T) {
+	tests := []struct {
+		r    rune
+		want bool
+	}{
+		{'中', true},
+		{'文', true},
+		{'a', false},
+		{'Z', false},
+		{'0', false},
+		{'_', false},
+	}
+
+	for _, tt := range tests {
+		got := isChinese(tt.r)
+		if got != tt.want {
+			t.Errorf("isChinese(%q) = %v, want %v", tt.r, got, tt.want)
+		}
+	}
+}