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Add tests for the movementDirection function

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Oliver Akins 2022-06-22 00:34:13 -06:00
parent 4feafba99b
commit 3b78f224df
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136
common/src/algorithms/movementDirection.spec.ts
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@ -1,4 +1,4 @@
import { countShips } from "./movementDirection"
import { countShips, determineDirection } from "./movementDirection"
import { expect } from "chai";
import "mocha";
@ -44,4 +44,138 @@ describe("The countShips function", () => {
throw "Function didn't throw an error";
} catch (_) {}
});
});
describe("The movementDirection function", () => {
it("should return positive when no other ships present (0-index)", () => {
let b = [
"p1", null, null, null, null,
null, null, null, null, null,
null, null, null, null, null,
];
let p = b.findIndex(x => x == "p1");
expect(determineDirection(b, p)).to.be.greaterThan(0);
});
it("should return positive when no other ships present (low-index)", () => {
let b = [
null, null, "p1", null, null,
null, null, null, null, null,
null, null, null, null, null,
];
let p = b.findIndex(x => x == "p1");
expect(determineDirection(b, p)).to.be.greaterThan(0);
});
it("should return positive when no other ships present (mid-index)", () => {
let b = [
null, null, null, null, null,
null, null, "p1", null, null,
null, null, null, null, null,
];
let p = b.findIndex(x => x == "p1");
expect(determineDirection(b, p)).to.be.greaterThan(0);
});
it("should return positive when no other ships present (high-index)", () => {
let b = [
null, null, null, null, null,
null, null, null, null, null,
null, null, "p1", null, null,
];
let p = b.findIndex(x => x == "p1");
expect(determineDirection(b, p)).to.be.greaterThan(0);
});
it("should return positive when no other ships present (max-index)", () => {
let b = [
null, null, null, null, null,
null, null, null, null, null,
null, null, null, null, "p1",
];
let p = b.findIndex(x => x == "p1");
expect(determineDirection(b, p)).to.be.greaterThan(0);
});
it("should return negative when the only other ship is at a lower index", () => {
let b = [
null, "p2", null, null, null,
null, null, "p1", null, null,
null, null, null, null, null,
];
let p = b.findIndex(x => x == "p1");
expect(determineDirection(b, p)).to.be.lessThan(0);
});
it("should return positive when the only other ship is at a higher index", () => {
let b = [
null, null, null, null, null,
null, null, "p1", null, null,
null, null, null, "p2", null,
];
let p = b.findIndex(x => x == "p1");
expect(determineDirection(b, p)).to.be.greaterThan(0);
});
it("should return positive when the closest ship is at a higher index", () => {
let b = [
null, "p3", null, null, null,
null, null, "p1", null, null,
null, null, "p2", null, null,
];
let p = b.findIndex(x => x == "p1");
expect(determineDirection(b, p)).to.be.greaterThan(0);
});
it("should return negative when the closest ship is at a lower index", () => {
let b = [
null, null, "p3", null, null,
null, null, "p1", null, null,
null, null, null, "p2", null,
];
let p = b.findIndex(x => x == "p1");
expect(determineDirection(b, p)).to.be.lessThan(0);
});
it("should return 0 when there is a tie between the closest ships (no extra ships)", () => {
let b = [
null, null, "p3", null, null,
null, null, "p1", null, null,
null, null, "p2", null, null,
];
let p = b.findIndex(x => x == "p1");
expect(determineDirection(b, p)).to.equal(0);
});
it("should return negative when there is a tie between the closest ships (extra ships in negative direction)", () => {
let b = [
null, "p4", "p3", null, null,
null, null, "p1", null, null,
null, null, "p2", null, null,
];
let p = b.findIndex(x => x == "p1");
expect(determineDirection(b, p)).to.be.lessThan(0);
});
it("should return positive when there is a tie between the closest ships (extra ships in positive direction)", () => {
let b = [
null, null, "p3", null, null,
null, null, "p1", null, null,
null, null, "p2", "p4", null,
];
let p = b.findIndex(x => x == "p1");
expect(determineDirection(b, p)).to.be.greaterThan(0);
});
it("should return positive when there is a tie between the closest ships (extra ships tied)", () => {
let b = [
null, "p5", "p3", null, null,
null, null, "p1", null, null,
null, null, "p2", "p4", null,
];
let p = b.findIndex(x => x == "p1");
expect(determineDirection(b, p)).to.equal(0);
});
});