Adding positive, bumping npms, exporting utility types.

Author: mirek

.vscode/settings.json

@@ -1,9 +1,7 @@
 {
   "files.exclude": {
-    "*.js": true,
-    "helpers/*.js": true,
-    "test/*.js": true
-  },
-  "typescript.tsdk": "node_modules/typescript/lib",
-  "typescript.format.insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets": true
+    "**/*.js": {
+      "when": "$(basename).ts"
+    }
+  }
 }

index.ts

@@ -30,6 +30,7 @@ import object from './object'
 import ok from './ok'
 import oneOf from './one-of'
 import or from './or'
+import positive from './positive'
 import predicate from './predicate'
 import regexp from './regexp'
 import rethrow from './rethrow'
@@ -39,6 +40,16 @@ import shape from './shape'
 import strftime from './strftime'
 import string from './string'
 import tuple from './tuple'
+import type Alias from './types/alias'
+import type Assert from './types/assert'
+import type AsyncReturnType from './types/async-return-type'
+import type Awaited from './types/awaited'
+import type Keyed from './types/keyed'
+import type Maybe from './types/maybe'
+import type NilOr from './types/nil-or'
+import type NullOr from './types/null-or'
+import type Predicate from './types/predicate'
+import type UndefinedOr from './types/undefined-or'
 import undefined_ from './undefined'
 import undefinedOr from './undefined-or'
 import unique from './unique'
@@ -77,6 +88,7 @@ export {
   ok,
   oneOf,
   or,
+  positive,
   predicate,
   regexp,
   rethrow,
@@ -89,7 +101,17 @@ export {
   undefined_ as undefined,
   undefinedOr,
   unique,
-  unknown
+  unknown,
+  Alias,
+  Assert,
+  AsyncReturnType,
+  Awaited,
+  Keyed,
+  Maybe,
+  NilOr,
+  NullOr,
+  Predicate,
+  UndefinedOr
 }
 
 export default {
@@ -125,6 +147,7 @@ export default {
   ok,
   oneOf,
   or,
+  positive,
   predicate,
   regexp,
   rethrow,

package.json

@@ -16,15 +16,15 @@
     "@appliedblockchain/changelog": "1.2.0",
     "@appliedblockchain/eslint-config": "2.6.0",
     "@tsconfig/node12": "1.0.7",
-    "@types/jest": "26.0.14",
-    "@typescript-eslint/eslint-plugin": "4.3.0",
-    "@typescript-eslint/parser": "4.3.0",
-    "eslint": "7.10.0",
-    "eslint-plugin-jest": "24.0.2",
-    "jest": "26.4.2",
+    "@types/jest": "26.0.20",
+    "@typescript-eslint/eslint-plugin": "4.16.1",
+    "@typescript-eslint/parser": "4.16.1",
+    "eslint": "7.21.0",
+    "eslint-plugin-jest": "24.1.5",
+    "jest": "26.6.3",
     "npm-check": "5.9.2",
-    "ts-jest": "26.4.1",
-    "typescript": "4.0.3"
+    "ts-jest": "26.5.3",
+    "typescript": "4.2.3"
   },
   "jest": {
     "preset": "ts-jest",
@@ -46,7 +46,11 @@
     "extends": [
       "plugin:@typescript-eslint/recommended",
       "@appliedblockchain"
-    ]
+    ],
+    "rules": {
+      "no-unused-vars": "off",
+      "@typescript-eslint/no-unused-vars": "error"
+    }
   },
   "eslintIgnore": [
     "wip/*",

positive.ts

@@ -0,0 +1,15 @@
+import { inspect } from 'util'
+import type Assert from './types/assert'
+
+export const positive: Assert<number> =
+  value => {
+    if (typeof value !== 'number') {
+      throw new TypeError(`Expected number, got ${inspect(value)}.`)
+    }
+    if (value <= 0) {
+      throw new TypeError(`Expected positive number, got ${inspect(value)}.`)
+    }
+    return value
+  }
+
+export default positive

test/strftime.test.ts

@@ -11,6 +11,6 @@ test('simple', () => {
   expect(() => $.strftime('%Y-%m-%d')('2000-13-01')).toThrow(
     'Expected \'%Y-%m-%d\' strftime format, got \'2000-13-01\', failed at index 5, unrecognised part \'13-01\'.'
   )
-  let d = new Date().toISOString()
+  const d = new Date().toISOString()
   expect($.strftime('%FT%T.%sZ')(d)).toEqual(d)
 })