Wrote write goroutine functions.

Refactored subpackages back to root package.

graph_test.go

@@ -0,0 +1,99 @@
+package heartwood
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestSimpleMatchKeys(t *testing.T) {
+	matchKeys := &SimpleMatchKeys{
+		Keys: map[string][]string{
+			"User":  {"pubkey"},
+			"Event": {"id"},
+			"Tag":   {"name", "value"},
+		},
+	}
+
+	t.Run("get labels", func(t *testing.T) {
+		expectedLabels := []string{"Event", "Tag", "User"}
+		labels := matchKeys.GetLabels()
+		assert.ElementsMatch(t, expectedLabels, labels)
+	})
+
+	t.Run("get keys", func(t *testing.T) {
+		expectedKeys := []string{"id"}
+		keys, exists := matchKeys.GetKeys("Event")
+		assert.True(t, exists)
+		assert.ElementsMatch(t, expectedKeys, keys)
+	})
+
+	t.Run("unknown key", func(t *testing.T) {
+		keys, exists := matchKeys.GetKeys("Unknown")
+		assert.False(t, exists)
+		assert.Nil(t, keys)
+	})
+}
+
+func TestMatchProps(t *testing.T) {
+	matchKeys := &SimpleMatchKeys{
+		Keys: map[string][]string{
+			"User":  {"pubkey"},
+			"Event": {"id"},
+		},
+	}
+
+	cases := []struct {
+		name           string
+		node           *Node
+		wantMatchLabel string
+		wantMatchProps Properties
+		wantErr        bool
+		wantErrText    string
+	}{
+		{
+			name:           "matching label, all props present",
+			node:           NewEventNode("abc123"),
+			wantMatchLabel: "Event",
+			wantMatchProps: Properties{"id": "abc123"},
+		},
+		{
+			name:        "matching label, required prop missing",
+			node:        NewNode("Event", Properties{}),
+			wantErr:     true,
+			wantErrText: "missing property",
+		},
+		{
+			name:        "no recognized label",
+			node:        NewNode("Tag", Properties{"name": "e", "value": "abc"}),
+			wantErr:     true,
+			wantErrText: "no recognized label",
+		},
+		{
+			name: "multiple labels, one matches",
+			node: &Node{
+				Labels: NewSet("Event", "Unknown"),
+				Props: Properties{
+					"id": "abc123",
+				},
+			},
+			wantMatchLabel: "Event",
+			wantMatchProps: Properties{"id": "abc123"},
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			matchLabel, props, err := tc.node.MatchProps(matchKeys)
+			if tc.wantErr {
+				assert.Error(t, err)
+				if tc.wantErrText != "" {
+					assert.ErrorContains(t, err, tc.wantErrText)
+				}
+				return
+			}
+			assert.NoError(t, err)
+			assert.Equal(t, tc.wantMatchLabel, matchLabel)
+			assert.Equal(t, tc.wantMatchProps, props)
+		})
+	}
+}