typescript(option): test: added tests for bind

Signed-off-by: prescientmoon <git@moonythm.dev>

typescript/option/package.json

@@ -7,7 +7,8 @@
     "typings": "dist/index.esm.d.ts",
     "scripts": {
         "prebuild": "rimraf dist",
-        "build": "rollup -c rollup.config.ts"
+        "build": "rollup -c rollup.config.ts",
+        "test": "mocha -r ts-node/register src/**/*.test.ts"
     },
     "publishConfig": {
         "access": "public"
@@ -26,12 +27,17 @@
     "devDependencies": {
         "@rollup/plugin-commonjs": "^11.0.0",
         "@rollup/plugin-node-resolve": "^6.0.0",
+        "@types/chai": "^4.2.7",
+        "@types/mocha": "^5.2.7",
         "@types/node": "^12.12.21",
         "@wessberg/rollup-plugin-ts": "^1.1.83",
+        "chai": "^4.2.0",
+        "mocha": "^6.2.2",
         "rimraf": "^3.0.0",
         "rollup": "^1.27.14",
         "rollup-plugin-terser": "^5.1.3",
         "semantic-release": "^15.14.0",
+        "ts-node": "^8.5.4",
         "typescript": "^3.7.4",
         "utility-types": "^3.10.0"
     },

typescript/option/pnpm-lock.yaml

@@ -4,12 +4,17 @@ dependencies:
 devDependencies:
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   '@rollup/plugin-node-resolve': 6.0.0_rollup@1.27.14
+  '@types/chai': 4.2.7
+  '@types/mocha': 5.2.7
   '@types/node': 12.12.21
   '@wessberg/rollup-plugin-ts': 1.1.83_rollup@1.27.14+typescript@3.7.4
+  chai: 4.2.0
+  mocha: 6.2.2
   rimraf: 3.0.0
   rollup: 1.27.14
   rollup-plugin-terser: 5.1.3_rollup@1.27.14
   semantic-release: 15.14.0_semantic-release@15.14.0
+  ts-node: 8.5.4_typescript@3.7.4
   typescript: 3.7.4
   utility-types: 3.10.0
 lockfileVersion: 5.1
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+    engines:
+      node: '>=6'
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+    engines:
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+    resolution:
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@@ -1163,6 +1194,16 @@ packages:
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+  /arg/4.1.2:
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+    resolution:
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+    dev: true
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@@ -1298,6 +1347,19 @@ packages:
     hasBin: true
     resolution:
       integrity: sha1-fMEFXYItISlU0HsIXeolHMe8VQU=
+  /chai/4.2.0:
+    dependencies:
+      assertion-error: 1.1.0
+      check-error: 1.0.2
+      deep-eql: 3.0.1
+      get-func-name: 2.0.0
+      pathval: 1.1.0
+      type-detect: 4.0.8
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+    dev: true
+    resolution:
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     resolution:
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+  /cliui/5.0.0:
+    dependencies:
+      string-width: 3.1.0
+      strip-ansi: 5.2.0
+      wrap-ansi: 5.1.0
+    dev: true
+    resolution:
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+      ms: 2.1.1
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+  /deep-eql/3.0.1:
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+    dev: true
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+      has: 1.0.3
+      has-symbols: 1.0.1
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+      is-date-object: 1.0.2
+      is-symbol: 1.0.3
+    dev: true
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+  /find-up/3.0.0:
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+      path-exists: 3.0.0
+    dev: true
+    engines:
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+      browser-stdout: 1.3.1
+      debug: 3.2.6
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+      es-abstract: 1.17.0
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+  /p-locate/3.0.0:
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+      p-limit: 2.2.1
+    dev: true
+    engines:
+      node: '>=6'
+    resolution:
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+    dev: true
+    engines:
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+    resolution:
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+    dev: true
+    engines:
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+  /supports-color/6.0.0:
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+    dev: true
+    engines:
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+    resolution:
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+    dependencies:
+      arg: 4.1.2
+      diff: 4.0.1
+      make-error: 1.3.5
+      source-map-support: 0.5.16
+      typescript: 3.7.4
+      yn: 3.1.1
+    dev: true
+    engines:
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+    peerDependencies:
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+  /type-detect/4.0.8:
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+    dev: true
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+  /wrap-ansi/5.1.0:
+    dependencies:
+      ansi-styles: 3.2.1
+      string-width: 3.1.0
+      strip-ansi: 5.2.0
+    dev: true
+    engines:
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+  /yargs-parser/13.1.1:
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+      camelcase: 5.3.1
+      decamelize: 1.2.0
+    dev: true
+    resolution:
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+  /yargs-unparser/1.6.0:
+    dependencies:
+      flat: 4.1.0
+      lodash: 4.17.15
+      yargs: 13.3.0
+    dev: true
+    engines:
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+  /yargs/13.3.0:
+    dependencies:
+      cliui: 5.0.0
+      find-up: 3.0.0
+      get-caller-file: 2.0.5
+      require-directory: 2.1.1
+      require-main-filename: 2.0.0
+      set-blocking: 2.0.0
+      string-width: 3.1.0
+      which-module: 2.0.0
+      y18n: 4.0.0
+      yargs-parser: 13.1.1
+    dev: true
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+  /yn/3.1.1:
+    dev: true
+    engines:
+      node: '>=6'
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 specifiers:
   '@rollup/plugin-commonjs': ^11.0.0
   '@rollup/plugin-node-resolve': ^6.0.0
   '@thi.ng/compose': ^1.3.6
+  '@types/chai': ^4.2.7
+  '@types/mocha': ^5.2.7
   '@types/node': ^12.12.21
   '@wessberg/rollup-plugin-ts': ^1.1.83
+  chai: ^4.2.0
+  mocha: ^6.2.2
   rimraf: ^3.0.0
   rollup: ^1.27.14
   rollup-plugin-terser: ^5.1.3
   semantic-release: ^15.14.0
+  ts-node: ^8.5.4
   tslib: ^1.10.0
   typescript: ^3.7.4
   utility-types: ^3.10.0

typescript/option/src/helpers/bind.test.ts

@@ -0,0 +1,32 @@
+import { expect } from 'chai'
+import { bind } from './bind'
+import { Some, None } from '../types'
+import { constantly } from '@thi.ng/compose'
+
+describe('The bind helper', () => {
+    it('should return none for any callback when given None', () => {
+        // act
+        const result = bind(Some, None)
+
+        // assert
+        expect(result).to.equal(None)
+    })
+
+    describe('When given Some', () => {
+        it('should return None if the callback returns None', () => {
+            // act
+            const result = bind(constantly(None), Some(3))
+
+            // assert
+            expect(result).to.equal(None)
+        })
+
+        it('should return Some if the callback returns Some', () => {
+            // act
+            const result = bind(x => Some(x + 1), Some(3))
+
+            // assert
+            expect(result).to.equal(Some(4))
+        })
+    })
+})

typescript/option/tsconfig.json

@@ -1,5 +1,6 @@
 {
     "compilerOptions": {
+        "module": "CommonJS",
         "lib": ["esnext", "dom", "es2015.iterable"],
         "moduleResolution": "node",
         "strictNullChecks": true,