add tests for fns/ultimateGear, fns/handleTwoHanded, fns/randomVal, fns/predictableRandom and partial tests for ops/buy

test/common/fns/predictableRandom.js

@@ -0,0 +1,51 @@
+import predictableRandom from '../../../common/script/fns/predictableRandom';
+import {
+  generateUser,
+} from '../../helpers/common.helper';
+
+describe('shared.fns.predictableRandom', () => {
+  let user;
+
+  beforeEach(() => {
+    user = generateUser();
+  });
+
+  it('returns a number', () => {
+    expect(predictableRandom(user)).to.be.a('number');
+  });
+
+  it('returns the same value when user.stats is the same and no seed is passed', () => {
+    user.stats.hp = 43;
+    user.stats.gp = 34;
+
+    let val1 = predictableRandom(user);
+    let val2 = predictableRandom(user);
+
+    expect(val2).to.equal(val1);
+  });
+
+  it('returns a different value when user.stats is not the same and no seed is passed', () => {
+    user.stats.hp = 43;
+    user.stats.gp = 34;
+    let val1 = predictableRandom(user);
+
+    user.stats.gp = 35;
+    let val2 = predictableRandom(user);
+
+    expect(val2).to.not.equal(val1);
+  });
+
+  it('returns the same value when the same seed is passed', () => {
+    let val1 = predictableRandom(user, 4452673762);
+    let val2 = predictableRandom(user, 4452673762);
+
+    expect(val2).to.equal(val1);
+  });
+
+  it('returns a different value when a different seed is passed', () => {
+    let val1 = predictableRandom(user, 4452673761);
+    let val2 = predictableRandom(user, 4452673762);
+
+    expect(val2).to.not.equal(val1);
+  });
+});