Initial commit:

Added framework to generate DOT and png files of character map chart
from data folder.
Added all figures in the 1-2 chapters.
Added font file SimSum for render chart

pkg/relationship/relationship.go

@@ -0,0 +1,24 @@
+package relationship
+
+import "fmt"
+
+type Relationship struct {
+	Src         string `yaml:"source"`
+	Dst         string `yaml:"destination"`
+	Description string `yaml:"description"`
+	Bidirection bool   `yaml:"bidirection"`
+}
+
+func (r Relationship) IsSame(other Relationship) bool {
+	if r.Bidirection {
+		if r.Description != other.Description {
+			return false
+		}
+		return (r.Src == other.Src && r.Dst == other.Dst) || (r.Src == other.Dst && r.Dst == other.Src)
+	}
+	return r.Src == other.Src && r.Dst == other.Dst && r.Description == other.Description
+}
+
+func (r Relationship) GetKey() (string, string) {
+	return fmt.Sprintf("%s-%s", r.Src, r.Dst), fmt.Sprintf("%s-%s", r.Dst, r.Src)
+}

pkg/relationship/relationship_test.go

@@ -0,0 +1,120 @@
+package relationship_test
+
+import (
+	"testing"
+	r "xyj-figures/pkg/relationship"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRelationship_IsSame(t *testing.T) {
+	tests := []struct {
+		name     string
+		r        r.Relationship
+		other    r.Relationship
+		expected bool
+	}{
+		{
+			name: "Bidirectional relationships with same source and destination",
+			r: r.Relationship{
+				Src:         "A",
+				Dst:         "B",
+				Description: "friend",
+				Bidirection: true,
+			},
+			other: r.Relationship{
+				Src:         "A",
+				Dst:         "B",
+				Description: "friend",
+				Bidirection: true,
+			},
+			expected: true,
+		},
+		{
+			name: "Bidirectional relationships with swapped source and destination",
+			r: r.Relationship{
+				Src:         "A",
+				Dst:         "B",
+				Description: "friend",
+				Bidirection: true,
+			},
+			other: r.Relationship{
+				Src:         "B",
+				Dst:         "A",
+				Description: "friend",
+				Bidirection: true,
+			},
+			expected: true,
+		},
+		{
+			name: "Bidirectional relationships with different descriptions",
+			r: r.Relationship{
+				Src:         "A",
+				Dst:         "B",
+				Description: "friend",
+				Bidirection: true,
+			},
+			other: r.Relationship{
+				Src:         "A",
+				Dst:         "B",
+				Description: "enemy",
+				Bidirection: true,
+			},
+			expected: false,
+		},
+		{
+			name: "Unidirectional relationships with same source and destination",
+			r: r.Relationship{
+				Src:         "A",
+				Dst:         "B",
+				Description: "friend",
+				Bidirection: false,
+			},
+			other: r.Relationship{
+				Src:         "A",
+				Dst:         "B",
+				Description: "friend",
+				Bidirection: false,
+			},
+			expected: true,
+		},
+		{
+			name: "Unidirectional relationships with swapped source and destination",
+			r: r.Relationship{
+				Src:         "A",
+				Dst:         "B",
+				Description: "friend",
+				Bidirection: false,
+			},
+			other: r.Relationship{
+				Src:         "B",
+				Dst:         "A",
+				Description: "friend",
+				Bidirection: false,
+			},
+			expected: false,
+		},
+		{
+			name: "Unidirectional relationships with different descriptions",
+			r: r.Relationship{
+				Src:         "A",
+				Dst:         "B",
+				Description: "friend",
+				Bidirection: false,
+			},
+			other: r.Relationship{
+				Src:         "A",
+				Dst:         "B",
+				Description: "enemy",
+				Bidirection: false,
+			},
+			expected: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.expected, tt.r.IsSame(tt.other))
+		})
+	}
+}