feat(merge): add support for merging from a list of source files

cmd/relspec/convert_from_list_test.go

@@ -0,0 +1,183 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestReadDatabaseListForConvert_SingleFile(t *testing.T) {
+	dir := t.TempDir()
+	file := filepath.Join(dir, "schema.json")
+	writeTestJSON(t, file, []string{"users"})
+
+	db, err := readDatabaseListForConvert("json", []string{file})
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if len(db.Schemas) == 0 {
+		t.Fatal("expected at least one schema")
+	}
+	if len(db.Schemas[0].Tables) != 1 {
+		t.Errorf("expected 1 table, got %d", len(db.Schemas[0].Tables))
+	}
+}
+
+func TestReadDatabaseListForConvert_MultipleFiles(t *testing.T) {
+	dir := t.TempDir()
+	file1 := filepath.Join(dir, "schema1.json")
+	file2 := filepath.Join(dir, "schema2.json")
+	writeTestJSON(t, file1, []string{"users"})
+	writeTestJSON(t, file2, []string{"comments"})
+
+	db, err := readDatabaseListForConvert("json", []string{file1, file2})
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
+	total := 0
+	for _, s := range db.Schemas {
+		total += len(s.Tables)
+	}
+	if total != 2 {
+		t.Errorf("expected 2 tables (users + comments), got %d", total)
+	}
+}
+
+func TestReadDatabaseListForConvert_PathWithSpaces(t *testing.T) {
+	spacedDir := filepath.Join(t.TempDir(), "my schema files")
+	if err := os.MkdirAll(spacedDir, 0755); err != nil {
+		t.Fatal(err)
+	}
+	file := filepath.Join(spacedDir, "my users schema.json")
+	writeTestJSON(t, file, []string{"users"})
+
+	db, err := readDatabaseListForConvert("json", []string{file})
+	if err != nil {
+		t.Fatalf("unexpected error with spaced path: %v", err)
+	}
+	if db == nil {
+		t.Fatal("expected non-nil database")
+	}
+}
+
+func TestReadDatabaseListForConvert_MultipleFilesPathWithSpaces(t *testing.T) {
+	spacedDir := filepath.Join(t.TempDir(), "my schema files")
+	if err := os.MkdirAll(spacedDir, 0755); err != nil {
+		t.Fatal(err)
+	}
+	file1 := filepath.Join(spacedDir, "users schema.json")
+	file2 := filepath.Join(spacedDir, "posts schema.json")
+	writeTestJSON(t, file1, []string{"users"})
+	writeTestJSON(t, file2, []string{"posts"})
+
+	db, err := readDatabaseListForConvert("json", []string{file1, file2})
+	if err != nil {
+		t.Fatalf("unexpected error with spaced paths: %v", err)
+	}
+
+	total := 0
+	for _, s := range db.Schemas {
+		total += len(s.Tables)
+	}
+	if total != 2 {
+		t.Errorf("expected 2 tables, got %d", total)
+	}
+}
+
+func TestReadDatabaseListForConvert_EmptyList(t *testing.T) {
+	_, err := readDatabaseListForConvert("json", []string{})
+	if err == nil {
+		t.Error("expected error for empty file list")
+	}
+}
+
+func TestReadDatabaseListForConvert_InvalidFile(t *testing.T) {
+	_, err := readDatabaseListForConvert("json", []string{"/nonexistent/path/file.json"})
+	if err == nil {
+		t.Error("expected error for nonexistent file")
+	}
+}
+
+func TestRunConvert_FromListMutuallyExclusiveWithFromPath(t *testing.T) {
+	saved := saveConvertState()
+	defer restoreConvertState(saved)
+
+	dir := t.TempDir()
+	file := filepath.Join(dir, "schema.json")
+	writeTestJSON(t, file, []string{"users"})
+
+	convertSourceType = "json"
+	convertSourcePath = file
+	convertFromList = []string{file}
+	convertTargetType = "json"
+	convertTargetPath = filepath.Join(dir, "out.json")
+
+	err := runConvert(nil, nil)
+	if err == nil {
+		t.Error("expected error when --from-path and --from-list are both set")
+	}
+}
+
+func TestRunConvert_FromListEndToEnd(t *testing.T) {
+	saved := saveConvertState()
+	defer restoreConvertState(saved)
+
+	dir := t.TempDir()
+	file1 := filepath.Join(dir, "users.json")
+	file2 := filepath.Join(dir, "posts.json")
+	outFile := filepath.Join(dir, "merged.json")
+	writeTestJSON(t, file1, []string{"users"})
+	writeTestJSON(t, file2, []string{"posts"})
+
+	convertSourceType = "json"
+	convertSourcePath = ""
+	convertSourceConn = ""
+	convertFromList = []string{file1, file2}
+	convertTargetType = "json"
+	convertTargetPath = outFile
+	convertPackageName = ""
+	convertSchemaFilter = ""
+	convertFlattenSchema = false
+
+	if err := runConvert(nil, nil); err != nil {
+		t.Fatalf("runConvert() error = %v", err)
+	}
+
+	if _, err := os.Stat(outFile); os.IsNotExist(err) {
+		t.Error("expected output file to be created")
+	}
+}
+
+func TestRunConvert_FromListEndToEndPathWithSpaces(t *testing.T) {
+	saved := saveConvertState()
+	defer restoreConvertState(saved)
+
+	spacedDir := filepath.Join(t.TempDir(), "my schema dir")
+	if err := os.MkdirAll(spacedDir, 0755); err != nil {
+		t.Fatal(err)
+	}
+	file1 := filepath.Join(spacedDir, "users schema.json")
+	file2 := filepath.Join(spacedDir, "posts schema.json")
+	outFile := filepath.Join(spacedDir, "merged output.json")
+	writeTestJSON(t, file1, []string{"users"})
+	writeTestJSON(t, file2, []string{"posts"})
+
+	convertSourceType = "json"
+	convertSourcePath = ""
+	convertSourceConn = ""
+	convertFromList = []string{file1, file2}
+	convertTargetType = "json"
+	convertTargetPath = outFile
+	convertPackageName = ""
+	convertSchemaFilter = ""
+	convertFlattenSchema = false
+
+	if err := runConvert(nil, nil); err != nil {
+		t.Fatalf("runConvert() with spaced paths error = %v", err)
+	}
+
+	if _, err := os.Stat(outFile); os.IsNotExist(err) {
+		t.Error("expected output file to be created")
+	}
+}