More expressions and API cleanup

.eslintrc.json

@@ -3,7 +3,11 @@
   "overrides": [
     {
       "files": [
-        "dev/src/*.ts"
+        "dev/src/**/*.ts"
+      ],
+      "excludedFiles": [
+        "dev/src/v1/*.ts",
+        "dev/src/v1beta1/*.ts"
       ],
       "parser": "@typescript-eslint/parser",
       "rules": {
@@ -18,7 +22,8 @@
         "@typescript-eslint/no-unused-vars": [
           "warn",
           {
-            "argsIgnorePattern": "^_$" // Ignore args that are underscore only
+            // Ignore args that are underscore only
+            "argsIgnorePattern": "^_$"
           }
         ]
       }
@@ -40,6 +45,13 @@
             "object": "it",
             "property": "only"
           }
+        ],
+        "@typescript-eslint/no-unused-vars": [
+          "warn",
+          {
+            // Ignore args that are underscore only
+            "argsIgnorePattern": "^_$"
+          }
         ]
       }
     }

dev/src/path.ts

@@ -44,7 +44,7 @@ export const DEFAULT_DATABASE_ID = '(default)';
  */
 const RESOURCE_PATH_RE =
   // Note: [\s\S] matches all characters including newlines.
-  /^projects\/([^/]*)\/databases\/([^/]*)(?:\/documents\/)?([\s\S]*)$/;
+  /^projects\/([^/]+)\/databases\/([^/]+)(?:\/documents(?:\/([^/]+(?:\/[^/]+)*))?)?$/;
 
 /*!
  * A regular expression to verify whether a field name can be passed to the
@@ -455,8 +455,13 @@ export class QualifiedResourcePath extends ResourcePath {
     if (elements) {
       const project = elements[1];
       const database = elements[2];
-      const path = elements[3];
-      return new QualifiedResourcePath(project, database).append(path);
+      const root = new QualifiedResourcePath(project, database);
+
+      if (!elements[3]) {
+        return root;
+      } else {
+        return root.append(elements[3]);
+      }
     }
 
     throw new Error(`Resource name '${absolutePath}' is not valid.`);