Convert conversions module to typescript

Change-type: patch
Signed-off-by: Cameron Diver <cameron@resin.io>

src/lib/conversions.coffee

@@ -1,12 +0,0 @@
-_ = require 'lodash'
-
-exports.envArrayToObject = (env) ->
-	# env is an array of strings that say 'key=value'
-	toPair = (keyVal) ->
-		m = keyVal.match(/^([^=]+)=(.*)$/)
-		if !m?
-			console.log("WARNING: Could not correctly parse env var #{keyVal}. " +
-				'Please fix this var and recreate the container.')
-			return null
-		return m[1..]
-	_(env).map(toPair).filter(([_, v]) -> v?).fromPairs().value()

src/lib/conversions.ts

@@ -0,0 +1,21 @@
+import * as _ from 'lodash';
+
+import { EnvVarObject } from './types';
+
+export function envArrayToObject(env: string[]): EnvVarObject {
+	const toPair = (keyVal: string) => {
+		const m = keyVal.match(/^([^=]+)=(.*)$/);
+		if (m == null) {
+			console.log(`WARNING: Could not correctly parse env var ${keyVal}. ` +
+				'Please fix this var and recreate the container.');
+			return [null, null];
+		}
+		return m.slice(1);
+	};
+
+	return _(env)
+		.map(toPair)
+		.filter(([_, v]) => v != null)
+		.fromPairs()
+		.value();
+}

test/15-conversions.spec.coffee

@@ -0,0 +1,38 @@
+m = require 'mochainon'
+{ expect } = m.chai
+
+conversion = require '../src/lib/conversions'
+
+describe 'conversions', ->
+
+	describe 'envArrayToObject', ->
+		it 'should convert an env array to an object', ->
+			expect(conversion.envArrayToObject([
+				'key=value'
+				'test1=test2'
+				'k=v'
+				'equalsvalue=thisvaluehasan=char'
+				'asd='
+				'number=123'
+			])).to.deep.equal({
+				key: 'value'
+				test1: 'test2'
+				k: 'v'
+				equalsvalue: 'thisvaluehasan=char'
+				asd: ''
+				number: '123'
+			})
+
+		it 'should ignore invalid env array entries', ->
+			expect(conversion.envArrayToObject([
+				'key1',
+				'key1=value1'
+			])).to.deep.equal({
+				key1: 'value1'
+			})
+
+		it 'should return an empty object with an empty input', ->
+			expect(conversion.envArrayToObject(null)).to.deep.equal({})
+			expect(conversion.envArrayToObject('')).to.deep.equal({})
+			expect(conversion.envArrayToObject([])).to.deep.equal({})
+			expect(conversion.envArrayToObject(1)).to.deep.equal({})