Extracted new enums module and test suites

Author: Zaydek Michels-Gualtieri

src/Editor/Types/index.js

@@ -1,4 +1,4 @@
-import Enum from "lib/Enum"
+import Enum from "lib/enums/Enum"
 import iota from "lib/iota"
 
 // NOTE: Imports are intentionally unsorted.
@@ -36,6 +36,7 @@ export const components = {
 	[enumerated.a]:      A,
 }
 
+// TODO: Use NumberEnum
 const i = iota()
 
 // Maps types to sort orders for text components; render

src/Editor/keydown/enumerated.js

@@ -1,4 +1,4 @@
-import Enum from "lib/Enum"
+import Enum from "lib/enums/Enum"
 
 // Enumerates keydown types.
 const enumerated = new Enum(

src/Editor/useEditor/applyFormat.js

@@ -1,16 +1,14 @@
 import * as Types from "../Types"
-import iota from "lib/iota"
 import methods from "./methods"
+import NumberEnum from "lib/enums/NumberEnum"
 import queryCollection from "./queryCollection"
 
-const i = iota(-1)
-
-// Enumerates whether to apply a format.
-const enumerated = {
-	plaintext:      i(),
-	shouldNotApply: i(),
-	shouldApply:    i(),
-}
+// Enumerates how to apply a format.
+const enumerated = new NumberEnum(
+	"plaintext",
+	"shouldNotApply",
+	"shouldApply",
+)
 
 // Tests whether to apply a format.
 const testShouldApply = collection => (T, P = {}) => {

src/Editor/useEditor/delete.js

@@ -1,6 +1,5 @@
 import * as Iterators from "../Iterators"
 import * as Range from "../Range"
-import JSONClone from "lib/JSONClone"
 import methods from "./methods"
 import queryCollection from "./queryCollection"
 

src/lib/Enum/index.js src/lib/enums/Enum.jssrc/lib/Enum/index.js renamed to src/lib/enums/Enum.js

@@ -1,6 +1,6 @@
-import Enum from "./index"
+import Enum from "./Enum"
 
-test("Enum", () => {
+test("", () => {
 	const daysOfTheWeekEnum = new Enum(
 		"Monday",
 		"Tuesday",
@@ -16,7 +16,7 @@ test("Enum", () => {
 	expect(daysOfTheWeekEnum.Thursday).toBe("Thursday")
 	expect(daysOfTheWeekEnum.Friday).toBe("Friday")
 	expect(daysOfTheWeekEnum.Saturday).toBe("Saturday")
-	expect(daysOfTheWeekEnum.Saturday).toBe("Saturday")
+	expect(daysOfTheWeekEnum.Sunday).toBe("Sunday")
 
 	// TypeError: Cannot assign to read only property 'Wednesday' of object '#<Enum>'
 	expect(() => daysOfTheWeekEnum.Wednesday = "Humpday").toThrow()

src/lib/Enum/index.test.js src/lib/enums/Enum.test.jssrc/lib/Enum/index.test.js renamed to src/lib/enums/Enum.test.js

@@ -0,0 +1,12 @@
+// Enumerated map. Note that enums cannot be mutated once
+// constructed.
+class NumberEnum {
+	constructor(...enumKeys) {
+		for (let x = 0; x < enumKeys.length; x++) {
+			this[enumKeys[x]] = x
+		}
+		Object.freeze(this)
+	}
+}
+
+export default NumberEnum

src/lib/enums/NumberEnum.js

@@ -0,0 +1,23 @@
+import NumberEnum from "./NumberEnum"
+
+test("", () => {
+	const daysOfTheWeekEnum = new NumberEnum(
+		"Monday",
+		"Tuesday",
+		"Wednesday",
+		"Thursday",
+		"Friday",
+		"Saturday",
+		"Sunday",
+	)
+	expect(daysOfTheWeekEnum.Monday).toBe(0)
+	expect(daysOfTheWeekEnum.Tuesday).toBe(1)
+	expect(daysOfTheWeekEnum.Wednesday).toBe(2)
+	expect(daysOfTheWeekEnum.Thursday).toBe(3)
+	expect(daysOfTheWeekEnum.Friday).toBe(4)
+	expect(daysOfTheWeekEnum.Saturday).toBe(5)
+	expect(daysOfTheWeekEnum.Sunday).toBe(6)
+
+	// TypeError: Cannot assign to read only property 'Wednesday' of object '#<NumberEnum>'
+	expect(() => daysOfTheWeekEnum.Wednesday = "Humpday").toThrow()
+})