feat(ingestion): add wiki inventory loader

ingestion/internal/wiki/inventory_test.go

@@ -0,0 +1,62 @@
+// ingestion/internal/wiki/inventory_test.go
+package wiki
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestLoadInventory(t *testing.T) {
+	dir := t.TempDir()
+	require.NoError(t, os.MkdirAll(filepath.Join(dir, "wiki", "concepts"), 0o755))
+	require.NoError(t, os.MkdirAll(filepath.Join(dir, "wiki", "entities"), 0o755))
+	require.NoError(t, os.MkdirAll(filepath.Join(dir, "wiki", "sources"), 0o755))
+
+	require.NoError(t, os.WriteFile(
+		filepath.Join(dir, "wiki", "concepts", "domain-driven-design.md"),
+		[]byte("---\ntitle: Domain Driven Design\n---\n\n## Definition\n\nA thing.\n"),
+		0o644,
+	))
+	require.NoError(t, os.WriteFile(
+		filepath.Join(dir, "wiki", "entities", "ryan-singer.md"),
+		[]byte("---\ntitle: Ryan Singer\n---\n\n## Description\n\nDesigner.\n"),
+		0o644,
+	))
+
+	inv, err := LoadInventory(dir)
+	require.NoError(t, err)
+
+	assert.Len(t, inv[PageTypeConcept], 1)
+	assert.Equal(t, "domain-driven-design", inv[PageTypeConcept][0].Slug)
+	assert.Equal(t, "Domain Driven Design", inv[PageTypeConcept][0].Title)
+
+	assert.Len(t, inv[PageTypeEntity], 1)
+	assert.Equal(t, "ryan-singer", inv[PageTypeEntity][0].Slug)
+
+	assert.Empty(t, inv[PageTypeSource])
+}
+
+func TestLoadInventory_EmptyDirs(t *testing.T) {
+	dir := t.TempDir()
+	require.NoError(t, os.MkdirAll(filepath.Join(dir, "wiki", "concepts"), 0o755))
+	require.NoError(t, os.MkdirAll(filepath.Join(dir, "wiki", "entities"), 0o755))
+	require.NoError(t, os.MkdirAll(filepath.Join(dir, "wiki", "sources"), 0o755))
+
+	inv, err := LoadInventory(dir)
+	require.NoError(t, err)
+	assert.Empty(t, inv[PageTypeConcept])
+	assert.Empty(t, inv[PageTypeEntity])
+	assert.Empty(t, inv[PageTypeSource])
+}
+
+func TestLoadInventory_MissingDirsOk(t *testing.T) {
+	dir := t.TempDir()
+	// No wiki/ subdirs at all
+	inv, err := LoadInventory(dir)
+	require.NoError(t, err)
+	assert.NotNil(t, inv)
+}