add comprehensive tests for angle classification including acute, obtuse, straight, reflex, and invalid cases

Author: rahanasuleiman8-ship-it

implement-and-rewrite-tests/implement-tests-with-node-test/1-get-angle-type.test.js

@@ -3,10 +3,48 @@ import test from "node:test";
 
 import { getAngleType } from "../implement/1-get-angle-type.js";
 
-// TODO: Write tests to cover all cases, including boundary and invalid cases.
 // Example: Identify Right Angles
 
 test("Classifies right angles", () => {
   const right = getAngleType(90);
   assert.equal(right, "Right angle");
 });
+
+// Acute Angles (0° < angle < 90°)
+test("Classifies acute angles", () => {
+  assert.equal(getAngleType(1), "Acute angle");
+  assert.equal(getAngleType(45), "Acute angle");
+  assert.equal(getAngleType(89.9), "Acute angle");
+});
+
+// Right Angles (angle === 90°)
+test("Classifies right angles", () => {
+  assert.equal(getAngleType(90), "Right angle");
+});
+
+// Obtuse Angles (90° < angle < 180°)
+test("Classifies obtuse angles", () => {
+  assert.equal(getAngleType(90.1), "Obtuse angle");
+  assert.equal(getAngleType(135), "Obtuse angle");
+  assert.equal(getAngleType(179.9), "Obtuse angle");
+});
+
+// Straight Angles (angle === 180°)
+test("Classifies straight angles", () => {
+  assert.equal(getAngleType(180), "Straight angle");
+});
+
+// Reflex Angles (180° < angle < 360°)
+test("Classifies reflex angles", () => {
+  assert.equal(getAngleType(180.1), "Reflex angle");
+  assert.equal(getAngleType(270), "Reflex angle");
+  assert.equal(getAngleType(359.9), "Reflex angle");
+});
+
+// Invalid & Boundary Cases (<= 0° or >= 360°)
+test("Classifies invalid angles and exact boundaries", () => {
+  assert.equal(getAngleType(0), "Invalid angle");
+  assert.equal(getAngleType(-45), "Invalid angle");
+  assert.equal(getAngleType(360), "Invalid angle");
+  assert.equal(getAngleType(400), "Invalid angle");
+});