chore: remove unused dependencies

package.json

@@ -67,15 +67,12 @@
     "@google-cloud/promisify": "^0.3.0",
     "arrify": "^1.0.1",
     "concat-stream": "^1.6.2",
-    "create-error-class": "^3.0.2",
     "extend": "^3.0.1",
     "google-auth-library": "^2.0.0",
     "google-gax": "^0.20.0",
-    "google-proto-files": "^0.17.0",
     "is": "^3.2.1",
     "lodash.flatten": "^4.4.0",
     "lodash.merge": "^4.6.1",
-    "prop-assign": "^1.0.0",
     "split-array-stream": "^2.0.0",
     "stream-events": "^1.0.4",
     "through2": "^2.0.3"
@@ -84,7 +81,6 @@
     "@google-cloud/nodejs-repo-tools": "^2.3.0",
     "async": "^2.6.1",
     "codecov": "^3.0.2",
-    "deep-strict-equal": "^0.2.0",
     "eslint": "^5.0.0",
     "eslint-config-prettier": "^3.0.0",
     "eslint-plugin-node": "^8.0.0",

src/entity.js

@@ -17,20 +17,21 @@
 'use strict';
 
 const arrify = require('arrify');
-const createErrorClass = require('create-error-class');
 const extend = require('extend');
 const is = require('is');
 
 const entity = module.exports;
 
-const InvalidKeyError = createErrorClass('InvalidKey', function(opts) {
-  const errorMessages = {
-    MISSING_KIND: 'A key should contain at least a kind.',
-    MISSING_ANCESTOR_ID: 'Ancestor keys require an id or name.',
-  };
-
-  this.message = errorMessages[opts.code];
-});
+class InvalidKeyError extends Error {
+  constructor(opts) {
+    const errorMessages = {
+      MISSING_KIND: 'A key should contain at least a kind.',
+      MISSING_ANCESTOR_ID: 'Ancestor keys require an id or name.',
+    };
+    super(errorMessages[opts.code]);
+    this.name = 'InvalidKey';
+  }
+}
 
 /**
  * A symbol to access the Key object from an entity object.

src/request.js

@@ -22,7 +22,6 @@ const {promisifyAll} = require('@google-cloud/promisify');
 const concat = require('concat-stream');
 const extend = require('extend');
 const is = require('is');
-const propAssign = require('prop-assign');
 const {split} = require('split-array-stream');
 const streamEvents = require('stream-events');
 const through = require('through2');
@@ -477,7 +476,10 @@ class DatastoreRequest {
   insert(entities, callback) {
     entities = arrify(entities)
       .map(DatastoreRequest.prepareEntityObject_)
-      .map(propAssign('method', 'insert'));
+      .map(x => {
+        x.method = 'insert';
+        return x;
+      });
 
     this.save(entities, callback);
   }
@@ -967,7 +969,10 @@ class DatastoreRequest {
               let values = value.arrayValue && value.arrayValue.values;
 
               if (values) {
-                values = values.map(propAssign('excludeFromIndexes', excluded));
+                values = values.map(x => {
+                  x.excludeFromIndexes = excluded;
+                  return x;
+                });
               } else {
                 value.excludeFromIndexes = data.excludeFromIndexes;
               }
@@ -1045,7 +1050,10 @@ class DatastoreRequest {
   update(entities, callback) {
     entities = arrify(entities)
       .map(DatastoreRequest.prepareEntityObject_)
-      .map(propAssign('method', 'update'));
+      .map(x => {
+        x.method = 'update';
+        return x;
+      });
 
     this.save(entities, callback);
   }
@@ -1067,7 +1075,10 @@ class DatastoreRequest {
   upsert(entities, callback) {
     entities = arrify(entities)
       .map(DatastoreRequest.prepareEntityObject_)
-      .map(propAssign('method', 'upsert'));
+      .map(x => {
+        x.method = 'upsert';
+        return x;
+      });
 
     this.save(entities, callback);
   }

test/entity.js

@@ -17,12 +17,6 @@
 'use strict';
 
 const assert = require('assert');
-const deepStrictEqual = require('deep-strict-equal');
-assert.deepStrictEqual =
-  assert.deepStrictEqual ||
-  function() {
-    return assert(deepStrictEqual.apply(this, arguments));
-  };
 const extend = require('extend');
 
 const Datastore = require('../');