markov-typescript
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A Markov Chain library written in Typescript.
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<a href="../index.html">all files</a> / <a href="index.html">spec/</a> weighted-dictionary.spec.1.ts
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">import { WeightedDictionary } from "../src/weighted-dictionary";
describe("WeightedDictionary<T>", () => {
describe("constructor", () => {
it("Empty dictionary has weight of zero", function () {
const dict = new WeightedDictionary<string>();
expect(dict.totalWeight).toBe(0);
});
});
describe("setValue", () => {
it("Adding new value increments weight", function () {
const dict = new WeightedDictionary<string>();
dict.setValue("test", 4);
expect(dict.totalWeight).toBe(4);
});
it("Adding multiple values increments weight", function () {
const dict = new WeightedDictionary<string>();
dict.setValue("test1", 4);
dict.setValue("test2", 2);
dict.setValue("test3", 3);
expect(dict.totalWeight).toBe(9);
});
it("Resetting existing value has correct weight", function () {
const dict = new WeightedDictionary<string>();
dict.setValue("test1", 4);
dict.setValue("test2", 2);
dict.setValue("test3", 3);
dict.setValue("test1", 1);
expect(dict.totalWeight).toBe(6);
});
});
describe("incrementValue", () => {
it("element weight increments", function () {
const dict = new WeightedDictionary<string>();
dict.setValue("test", 4);
dict.incrementValue("test", 3);
expect(dict.getValue("test")).toBe(7);
});
it("Total weight increments", function () {
const dict = new WeightedDictionary<string>();
dict.setValue("test1", 4);
dict.setValue("test2", 2);
dict.setValue("test3", 3);
dict.incrementValue("test2", 5);
expect(dict.totalWeight).toBe(14);
});
});
describe("remove", () => {
it("Removing value decrements weight", function () {
const dict = new WeightedDictionary<string>();
dict.setValue("test1", 4);
dict.setValue("test2", 2);
dict.setValue("test3", 3);
dict.remove("test2");
expect(dict.totalWeight).toBe(7);
});
});
describe("toStrFunction", () => {
it("setValue respects toStrFunction", function () {
const dict = new WeightedDictionary<string>(k => k.toLowerCase());
dict.setValue("TEST", 1);
dict.setValue("test", 2);
dict.setValue("teST", 3);
expect(dict.size()).toBe(1);
});
it("getValue respects toStrFunction", function () {
const dict = new WeightedDictionary<string>(k => k.toLowerCase());
dict.setValue("TEST", 1);
dict.setValue("test", 2);
dict.setValue("teST", 3);
expect(dict.getValue("TEst")).toBe(3);
});
it("remove respects toStrFunction", function () {
const dict = new WeightedDictionary<string>(k => k.toLowerCase());
dict.setValue("TEST", 1);
dict.setValue("test", 2);
dict.setValue("teST", 3);
dict.remove("TEst");
expect(dict.size()).toBe(0);
});
it("incrementValue respects toStrFunction", function () {
const dict = new WeightedDictionary<string>(k => k.toLowerCase());
dict.setValue("TEST", 1);
dict.incrementValue("test", 2);
dict.incrementValue("teST", 3);
dict.incrementValue("TEst", 7);
expect(dict.getValue("tESt")).toBe(13);
});
});
});
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