Repository: icebob/fastest-validator
Pull request #149 (2020-06-05 22:19:25)

[Enhancement] Allow `empty = true` when using the `string` type with pattern
@icebob This PR will solve half of this issue: #116 

Usage (before):
```js
const schema = {
    pair: { type: "string", pattern: "^fastest", empty: true}
}

console.log(v.validate({ pair: "" }, schema)); // Fail (wrong pattern)
console.log(v.validate({ pair: "fastest-validator" }, schema)); // Valid
``` 

Usage (after):
```js
const schema = {
    pair: { type: "string", pattern: "^fastest", empty: true}
}

console.log(v.validate({ pair: "" }, schema)); // Valid
console.log(v.validate({ pair: "fastest-validator" }, schema)); // Valid
``` 




Patch:
diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index 06a0cf4..6053a6e 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [10.x, 12.x, 14.x]
+        node-version: [8.x, 10.x, 12.x, 14.x]
 
     steps:
     - uses: actions/checkout@v1
diff --git a/.travis.yml b/.travis.yml
index 185e54b..5286d37 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,8 +4,10 @@ cache:
   - node_modules
 node_js:
     - "14"
+    - "13"
     - "12"
     - "10"
+    - "8"
 
 script:
   - npm run test:travis
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ea85c58..87ee292 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,13 +1,3 @@
---------------------------------------------------
-<a name="1.4.2"></a>
-# 1.4.2 (2020-06-03)
-
-## Changes
-- added Deno example to readme.
-- added `minProps` and `maxProps` by [@alexjab](https://github.com/alexjab) [#142](https://github.com/icebob/fastest-validator/issues/142)
-- shorthand for nested objectsby [@erfanium](https://github.com/erfanium) [#143](https://github.com/icebob/fastest-validator/issues/143)
-- typescript generics for `compile` method by [@Gamote](https://github.com/Gamote) [#146](https://github.com/icebob/fastest-validator/issues/146)
-
 --------------------------------------------------
 <a name="1.4.1"></a>
 # 1.4.1 (2020-05-13)
diff --git a/index.d.ts b/index.d.ts
index f3fa65f..3696e58 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -715,11 +715,11 @@ declare module "fastest-validator" {
 		| ValidationRuleObject
 		| ValidationRuleObject[]
 		| ValidationRuleName;
-	
+
 	/**
 	 * Definition for validation schema based on validation rules
 	 */
-	type ValidationSchema<T = any> = {
+	interface ValidationSchema {
 		/**
 		 * Object properties which are not specified on the schema are ignored by default.
 		 * If you set the $$strict option to true any additional properties will result in an strictObject error.
@@ -733,12 +733,12 @@ declare module "fastest-validator" {
 		 * @default false
 		 */
 		$$root?: boolean;
-	} & {
+
 		/**
 		 * List of validation rules for each defined field
 		 */
-		[key in keyof T]: ValidationRule | undefined | any;
-	};
+		[key: string]: ValidationRule | undefined | any;
+	}
 
 	/**
 	 * Structure with description of validation error message
@@ -897,8 +897,8 @@ declare module "fastest-validator" {
 		 * @param {ValidationSchema | ValidationSchema[]} schema Validation schema definition that should be used for validation
 		 * @return {(value: any) => (true | ValidationError[])} function that can be used next for validation of current schema
 		 */
-		compile<T = any>(
-		  schema: ValidationSchema<T> | ValidationSchema<T>[],
+		compile(
+			schema: ValidationSchema | ValidationSchema[]
 		): (value: any) => true | ValidationError[];
 
 		/**
diff --git a/lib/rules/string.js b/lib/rules/string.js
index eaf8e74..23a0a20 100644
--- a/lib/rules/string.js
+++ b/lib/rules/string.js
@@ -136,9 +136,17 @@ module.exports = function checkString({ schema, messages }, path, context) {
 		if (typeof schema.pattern == "string")
 			pattern = new RegExp(schema.pattern, schema.patternFlags);
 
-		src.push(`
+		const patternValidator = `
 			if (!${pattern.toString()}.test(value))
 				${this.makeError({ type: "stringPattern", expected: "\"" + pattern.toString().replace('"', "\\\"") + "\"", actual: "origValue", messages })}
+		`;
+
+		src.push(`
+			if (${schema.empty} !== false && len === 0) {
+				// Do nothing
+			} else {
+				${patternValidator}
+			}
 		`);
 	}
 
diff --git a/package-lock.json b/package-lock.json
index 4f2f1bb..c1a80e5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "fastest-validator",
-  "version": "1.4.2",
+  "version": "1.4.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -15,20 +15,26 @@
       }
     },
     "@ampproject/rollup-plugin-closure-compiler": {
-      "version": "0.26.0",
-      "resolved": "https://registry.npmjs.org/@ampproject/rollup-plugin-closure-compiler/-/rollup-plugin-closure-compiler-0.26.0.tgz",
-      "integrity": "sha512-wuHzGE6BDhDR0L7nUPlpQDPGiGnMw+b0B+cDPG0S5TatOmFNQva8KSNdBHan3L9RbvNyYXOXicuCrZtSoBfrBg==",
+      "version": "0.25.2",
+      "resolved": "https://registry.npmjs.org/@ampproject/rollup-plugin-closure-compiler/-/rollup-plugin-closure-compiler-0.25.2.tgz",
+      "integrity": "sha512-ohOa/2JRQ4vVVbTO48XS2F4WZyL+sWEfjMFDPfdZTz57+EqVjf8RoWLfqfdkHtCGGpGvoHQZUWciHhep2aXkmQ==",
       "dev": true,
       "requires": {
         "@ampproject/remapping": "0.2.0",
-        "acorn": "7.2.0",
+        "acorn": "7.1.1",
         "acorn-walk": "7.1.1",
         "estree-walker": "2.0.1",
-        "google-closure-compiler": "20200517.0.0",
+        "google-closure-compiler": "20200406.0.0",
         "magic-string": "0.25.7",
-        "uuid": "8.1.0"
+        "uuid": "7.0.3"
       },
       "dependencies": {
+        "acorn-walk": {
+          "version": "7.1.1",
+          "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-7.1.1.tgz",
+          "integrity": "sha512-wdlPY2tm/9XBr7QkKlq0WQVgiuGTX6YWPyRyBviSoScBuLfTVQhvwg6wJ369GJ/1nPfTLMfnrFIfjqVg6d+jQQ==",
+          "dev": true
+        },
         "estree-walker": {
           "version": "2.0.1",
           "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-2.0.1.tgz",
@@ -36,9 +42,9 @@
           "dev": true
         },
         "uuid": {
-          "version": "8.1.0",
-          "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.1.0.tgz",
-          "integrity": "sha512-CI18flHDznR0lq54xBycOVmphdCYnQLKn8abKn7PXUiKUGdEd+/l9LWNJmugXel4hXq7S+RMNl34ecyC9TntWg==",
+          "version": "7.0.3",
+          "resolved": "https://registry.npmjs.org/uuid/-/uuid-7.0.3.tgz",
+          "integrity": "sha512-DPSke0pXhTZgoF/d+WSt2QaKMCFSfx7QegxEWT+JOuHF5aWrKEn0G+ztjuJg/gG8/ItK+rbPCD/yNv8yyih6Cg==",
           "dev": true
         }
       }
@@ -53,19 +59,19 @@
       }
     },
     "@babel/core": {
-      "version": "7.10.2",
-      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.10.2.tgz",
-      "integrity": "sha512-KQmV9yguEjQsXqyOUGKjS4+3K8/DlOCE2pZcq4augdQmtTy5iv5EHtmMSJ7V4c1BIPjuwtZYqYLCq9Ga+hGBRQ==",
-      "dev": true,
-      "requires": {
-        "@babel/code-frame": "^7.10.1",
-        "@babel/generator": "^7.10.2",
-        "@babel/helper-module-transforms": "^7.10.1",
-        "@babel/helpers": "^7.10.1",
-        "@babel/parser": "^7.10.2",
-        "@babel/template": "^7.10.1",
-        "@babel/traverse": "^7.10.1",
-        "@babel/types": "^7.10.2",
+      "version": "7.9.6",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.9.6.tgz",
+      "integrity": "sha512-nD3deLvbsApbHAHttzIssYqgb883yU/d9roe4RZymBCDaZryMJDbptVpEpeQuRh4BJ+SYI8le9YGxKvFEvl1Wg==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.8.3",
+        "@babel/generator": "^7.9.6",
+        "@babel/helper-module-transforms": "^7.9.0",
+        "@babel/helpers": "^7.9.6",
+        "@babel/parser": "^7.9.6",
+        "@babel/template": "^7.8.6",
+        "@babel/traverse": "^7.9.6",
+        "@babel/types": "^7.9.6",
         "convert-source-map": "^1.7.0",
         "debug": "^4.1.0",
         "gensync": "^1.0.0-beta.1",
@@ -76,179 +82,17 @@
         "source-map": "^0.5.0"
       },
       "dependencies": {
-        "@babel/code-frame": {
-          "version": "7.10.1",
-          "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.10.1.tgz",
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-          "dev": true,
-          "requires": {
-            "@babel/highlight": "^7.10.1"
-          }
-        },
-        "@babel/generator": {
-          "version": "7.10.2",
-          "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.10.2.tgz",
-          "integrity": "sha512-AxfBNHNu99DTMvlUPlt1h2+Hn7knPpH5ayJ8OqDWSeLld+Fi2AYBTC/IejWDM9Edcii4UzZRCsbUt0WlSDsDsA==",
-          "dev": true,
-          "requires": {
-            "@babel/types": "^7.10.2",
-            "jsesc": "^2.5.1",
-            "lodash": "^4.17.13",
-            "source-map": "^0.5.0"
-          }
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-        "@babel/helper-function-name": {
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-          "requires": {
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-            "@babel/template": "^7.10.1",
-            "@babel/types": "^7.10.1"
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-        "@babel/helper-get-function-arity": {
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-        "@babel/helper-split-export-declaration": {
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-          "integrity": "sha512-UQ1LVBPrYdbchNhLwj6fetj46BcFwfS4NllJo/1aJsT+1dLTEnXJL0qHqtY7gPzF8S2fXBJamf1biAXV3X077g==",
-          "dev": true,
-          "requires": {
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-        "@babel/helper-validator-identifier": {
-          "version": "7.10.1",
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-          "dev": true
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-        "@babel/highlight": {
-          "version": "7.10.1",
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-          "integrity": "sha512-8rMof+gVP8mxYZApLF/JgNDAkdKa+aJt3ZYxF8z6+j/hpeXL7iMsKCPHa2jNMHu/qqBwzQF4OHNoYi8dMA/rYg==",
-          "dev": true,
-          "requires": {
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-            "chalk": "^2.0.0",
-            "js-tokens": "^4.0.0"
-          }
-        },
-        "@babel/parser": {
-          "version": "7.10.2",
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-          "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
-          "dev": true
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         "semver": {
           "version": "5.7.1",
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           "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
           "dev": true
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-          "dev": true,
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+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true
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@@ -267,547 +111,99 @@
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-      "dev": true,
-      "requires": {
-        "@babel/helper-get-function-arity": "^7.8.3",
-        "@babel/template": "^7.8.3",
-        "@babel/types": "^7.9.5"
-      }
-    },
-    "@babel/helper-get-function-arity": {
-      "version": "7.8.3",
-      "resolved": "https://registry.npmjs.org/@babel/helper-get-function-arity/-/helper-get-function-arity-7.8.3.tgz",
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-    "@babel/helper-member-expression-to-functions": {
-      "version": "7.10.1",
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-        "webidl-conversions": {
-          "version": "5.0.0",
-          "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-5.0.0.tgz",
-          "integrity": "sha512-VlZwKPCkYKxQgeSbH5EyngOmRp7Ww7I9rQLERETtf5ofd9pGeswWiOtogpEO850jziPRarreGxn5QIiTqpb2wA==",
-          "dev": true
-        }
+        "tr46": "^1.0.1",
+        "webidl-conversions": "^4.0.2"
       }
     },
     "which": {
@@ -11563,9 +9974,9 @@
       }
     },
     "ws": {
-      "version": "7.3.0",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-7.3.0.tgz",
-      "integrity": "sha512-iFtXzngZVXPGgpTlP1rBqsUK82p9tKqsWRPg5L56egiljujJT3vGAYnHANvFxBieXrTFavhzhxW52jnaWV+w2w==",
+      "version": "7.2.5",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.2.5.tgz",
+      "integrity": "sha512-C34cIU4+DB2vMyAbmEKossWq2ZQDr6QEyuuCzWrM9zfw1sGc0mYiJ0UnG9zzNykt49C2Fi34hvr2vssFQRS6EA==",
       "dev": true
     },
     "xdg-basedir": {
diff --git a/package.json b/package.json
index a32b4b2..b9028c0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fastest-validator",
-  "version": "1.4.2",
+  "version": "1.4.1",
   "description": "The fastest JS validator library for NodeJS",
   "main": "index.js",
   "browser": "dist/index.min.js",
@@ -43,26 +43,26 @@
   },
   "homepage": "https://github.com/icebob/fastest-validator#readme",
   "devDependencies": {
-    "@ampproject/rollup-plugin-closure-compiler": "^0.26.0",
-    "@types/jest": "^25.2.3",
+    "@ampproject/rollup-plugin-closure-compiler": "^0.25.2",
+    "@types/jest": "^25.1.1",
     "benchmarkify": "^2.1.2",
     "cli-highlight": "^2.1.4",
     "coveralls": "^3.0.9",
-    "eslint": "^7.1.0",
-    "jest": "^26.0.1",
-    "jest-cli": "^26.0.1",
-    "nodemon": "^2.0.4",
+    "eslint": "^6.8.0",
+    "jest": "^25.5.4",
+    "jest-cli": "^25.5.4",
+    "nodemon": "^2.0.2",
     "npm-check": "^5.9.0",
-    "prettier": "^2.0.5",
-    "rollup": "^1.32.1",
+    "prettier": "^1.19.1",
+    "rollup": "^1.31.0",
     "rollup-plugin-buble": "^0.19.8",
     "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-copy": "^3.3.0",
     "rollup-plugin-uglify-es": "^0.0.1",
-    "ts-jest": "^26.1.0",
-    "ts-node": "^8.10.2",
-    "tsd": "^0.11.0",
-    "typescript": "^3.9.3"
+    "ts-jest": "^25.4.0",
+    "ts-node": "^8.6.2",
+    "tsd": "^0.10.0",
+    "typescript": "^3.7.5"
   },
   "jest": {
     "coverageDirectory": "../coverage",


Test patch:
diff --git a/test/rules/string.spec.js b/test/rules/string.spec.js
index 1464902..9b65462 100644
--- a/test/rules/string.spec.js
+++ b/test/rules/string.spec.js
@@ -27,6 +27,23 @@ describe("Test rule: string", () => {
 		expect(check("")).toEqual([{ type: "stringEmpty", actual: "", message: "The '' field must not be empty." }]);
 	});
 
+	it("check empty values (using pattern and empty=true)", () => {
+		const check = v.compile({ $$root: true, type: "string", pattern: "^fastest" });
+
+		expect(check("fastest-validator")).toEqual(true);
+		expect(check("")).toEqual(true);
+	});
+
+	it("check empty values (using pattern and empty=false)", () => {
+		const check = v.compile({ $$root: true, type: "string", pattern: "^fastest", empty: false });
+
+		expect(check("fastest-validator")).toEqual(true);
+		expect(check("")).toEqual([
+			{ type: "stringEmpty", actual: "", message: "The '' field must not be empty." },
+			{ type: "stringPattern", actual: "", "expected": "/^fastest/", message: "The '' field fails to match the required pattern." },
+		]);
+	});
+
 	it("check min length", () => {
 		const check = v.compile({ $$root: true, type: "string", min: 5 });
 
diff --git a/test/typescript/rules/string.spec.ts b/test/typescript/rules/string.spec.ts
index 576d1e6..942074f 100644
--- a/test/typescript/rules/string.spec.ts
+++ b/test/typescript/rules/string.spec.ts
@@ -23,12 +23,29 @@ describe('TypeScript Definitions', () => {
         });
 
         it('check empty values', () => {
-            const check = v.compile({ $$root: true, type: 'string', empty: false });
+            const check = v.compile({ $$root: true, type: 'string', empty: false } as RuleString);
 
             expect(check('abc')).toEqual(true);
             expect(check('')).toEqual([{ type: 'stringEmpty', actual: '', message: 'The \'\' field must not be empty.' }]);
         });
 
+		it("check empty values (using pattern and empty=true)", () => {
+			const check = v.compile({ $$root: true, type: "string", pattern: "^fastest" } as RuleString);
+
+			expect(check("fastest-validator")).toEqual(true);
+			expect(check("")).toEqual(true);
+		});
+
+		it("check empty values (using pattern and empty=false)", () => {
+			const check = v.compile({ $$root: true, type: "string", pattern: "^fastest", empty: false } as RuleString);
+
+			expect(check("fastest-validator")).toEqual(true);
+			expect(check("")).toEqual([
+				{ type: "stringEmpty", actual: "", message: "The '' field must not be empty." },
+				{ type: "stringPattern", actual: "", "expected": "/^fastest/", message: "The '' field fails to match the required pattern." },
+			]);
+		});
+
         it('check min length', () => {
             const check = v.compile({ $$root: true, type: 'string', min: 5 } as RuleString);