Add blend pricing tests

projects/planner/src/app/shared/blend-pricing.service.spec.ts

@@ -0,0 +1,324 @@
+import { TestBed } from '@angular/core/testing';
+import { BlendPricingService } from './blend-pricing.service';
+import { GasBlenderService } from './gas-blender.service';
+import { UnitConversion } from './UnitConversion';
+
+interface BlendPrice {
+    o2Price: number;
+    hePrice: number;
+    topMixPrice: number;
+    totalPrice: number;
+}
+
+class TestGasBlenderService {
+    addO2: number;
+    addHe: number;
+    addTop: number;
+
+    constructor(o2: number = 0, he: number = 0, top: number = 0) {
+        this.addO2 = o2;
+        this.addHe = he;
+        this.addTop = top;
+    }
+}
+
+describe('BlendPricingService', () => {
+    let sut: BlendPricingService;
+    let gasBlender: TestGasBlenderService;
+
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            providers: [
+                BlendPricingService,
+                { provide: GasBlenderService, useClass: TestGasBlenderService },
+                UnitConversion
+            ]
+        });
+
+        sut = TestBed.inject(BlendPricingService);
+        gasBlender = TestBed.inject(GasBlenderService) as TestGasBlenderService;
+    });
+
+    it('should calculate prices when all unit prices and gas amounts are 0', () => {
+        sut.o2UnitPrice = 0;
+        sut.heUnitPrice = 0;
+        sut.topMixUnitPrice = 0;
+
+        gasBlender.addO2 = 0;
+        gasBlender.addHe = 0;
+        gasBlender.addTop = 0;
+
+        sut.calculate();
+
+        const expected: BlendPrice = {
+            o2Price: 0,
+            hePrice: 0,
+            topMixPrice: 0,
+            totalPrice: 0
+        };
+
+        const result: BlendPrice = {
+            o2Price: sut.o2Price,
+            hePrice: sut.hePrice,
+            topMixPrice: sut.topMixPrice,
+            totalPrice: sut.totalPrice
+        };
+
+        expect(result).toEqual(expected);
+    });
+
+    it('should calculate prices when unit prices and amounts of gases are positive numbers', () => {
+        sut.o2UnitPrice = 1;
+        sut.heUnitPrice = 2;
+        sut.topMixUnitPrice = 3;
+
+        gasBlender.addO2 = 4;
+        gasBlender.addHe = 5;
+        gasBlender.addTop = 6;
+
+        sut.calculate();
+
+        const expected: BlendPrice = {
+            o2Price: 4,
+            hePrice: 10,
+            topMixPrice: 18,
+            totalPrice: 32
+        };
+
+        const result: BlendPrice = {
+            o2Price: sut.o2Price,
+            hePrice: sut.hePrice,
+            topMixPrice: sut.topMixPrice,
+            totalPrice: sut.totalPrice
+        };
+
+        expect(result).toEqual(expected);
+    });
+
+    it('should calculate prices when one of unit price is 3 and all amounts of gases are 0', () => {
+        sut.o2UnitPrice = 0;
+        sut.heUnitPrice = 0;
+        sut.topMixUnitPrice = 3;
+
+        gasBlender.addO2 = 0;
+        gasBlender.addHe = 0;
+        gasBlender.addTop = 0;
+
+        sut.calculate();
+
+        const expected: BlendPrice = {
+            o2Price: 0,
+            hePrice: 0,
+            topMixPrice: 0,
+            totalPrice: 0
+        };
+
+        const result: BlendPrice = {
+            o2Price: sut.o2Price,
+            hePrice: sut.hePrice,
+            topMixPrice: sut.topMixPrice,
+            totalPrice: sut.totalPrice
+        };
+
+        expect(result).toEqual(expected);
+    });
+
+    it('should calculate prices when all units prices are 0 and one of amounts of gases is 4', () => {
+        sut.o2UnitPrice = 0;
+        sut.heUnitPrice = 0;
+        sut.topMixUnitPrice = 0;
+
+        gasBlender.addO2 = 0;
+        gasBlender.addHe = 0;
+        gasBlender.addTop = 4;
+
+        sut.calculate();
+
+        const expected: BlendPrice = {
+            o2Price: 0,
+            hePrice: 0,
+            topMixPrice: 0,
+            totalPrice: 0
+        };
+
+        const result: BlendPrice = {
+            o2Price: sut.o2Price,
+            hePrice: sut.hePrice,
+            topMixPrice: sut.topMixPrice,
+            totalPrice: sut.totalPrice
+        };
+
+        expect(result).toEqual(expected);
+    });
+
+    it('should calculate prices when units prices are positive numbers and amounts of gases are negative numbers', () => {
+        sut.o2UnitPrice = 1;
+        sut.heUnitPrice = 2;
+        sut.topMixUnitPrice = 3;
+
+        gasBlender.addO2 = -5;
+        gasBlender.addHe = -6;
+        gasBlender.addTop = -7;
+
+        sut.calculate();
+
+        const expected: BlendPrice = {
+            o2Price: -5,
+            hePrice: -12,
+            topMixPrice: -21,
+            totalPrice: -38
+        };
+
+        const result: BlendPrice = {
+            o2Price: sut.o2Price,
+            hePrice: sut.hePrice,
+            topMixPrice: sut.topMixPrice,
+            totalPrice: sut.totalPrice
+        };
+
+        expect(result).toEqual(expected);
+    });
+
+    it('should calculate totalPrice when one unit price is positive, other are negative and amounts of gases are negative numbers', () => {
+        sut.o2UnitPrice = -1;
+        sut.heUnitPrice = 2;
+        sut.topMixUnitPrice = -3;
+
+        gasBlender.addO2 = -4;
+        gasBlender.addHe = -5;
+        gasBlender.addTop = -6;
+
+        sut.calculate();
+
+        const expected: BlendPrice = {
+            o2Price: 4,
+            hePrice: -10,
+            topMixPrice: 18,
+            totalPrice: 12
+        };
+
+        const result: BlendPrice = {
+            o2Price: sut.o2Price,
+            hePrice: sut.hePrice,
+            topMixPrice: sut.topMixPrice,
+            totalPrice: sut.totalPrice
+        };
+
+        expect(result).toEqual(expected);
+    });
+
+    it('should calculate prices when all unit prices and gas amounts are negative', () => {
+        sut.o2UnitPrice = -1;
+        sut.heUnitPrice = -2;
+        sut.topMixUnitPrice = -3;
+
+        gasBlender.addO2 = -4;
+        gasBlender.addHe = -5;
+        gasBlender.addTop = -6;
+
+        sut.calculate();
+
+        const expected: BlendPrice = {
+            o2Price: 4,
+            hePrice: 10,
+            topMixPrice: 18,
+            totalPrice: 32
+        };
+
+        const result: BlendPrice = {
+            o2Price: sut.o2Price,
+            hePrice: sut.hePrice,
+            topMixPrice: sut.topMixPrice,
+            totalPrice: sut.totalPrice
+        };
+
+        expect(result).toEqual(expected);
+    });
+
+    it('should calculate prices when unit prices and gas amounts are very small values', () => {
+        sut.o2UnitPrice = 0.000001;
+        sut.heUnitPrice = 0.000002;
+        sut.topMixUnitPrice = 0.000003;
+
+        gasBlender.addO2 = 0.000004;
+        gasBlender.addHe = 0.000005;
+        gasBlender.addTop = 0.000006;
+
+        sut.calculate();
+
+        const expected: BlendPrice = {
+            o2Price: 0.000000000004,
+            hePrice: 0.00000000001,
+            topMixPrice: 0.000000000018,
+            totalPrice: 0.000000000032
+        };
+
+        const result: BlendPrice = {
+            o2Price: sut.o2Price,
+            hePrice: sut.hePrice,
+            topMixPrice: sut.topMixPrice,
+            totalPrice: sut.totalPrice
+        };
+
+        expect(result.o2Price).toBeCloseTo(expected.o2Price, 12);
+        expect(result.hePrice).toBeCloseTo(expected.hePrice, 12);
+        expect(result.topMixPrice).toBeCloseTo(expected.topMixPrice, 12);
+        expect(result.totalPrice).toBeCloseTo(expected.totalPrice, 12);
+    });
+
+    it('should calculate prices when unit prices and gas amounts are very large values', () => {
+        sut.o2UnitPrice = 1000000;
+        sut.heUnitPrice = 2000000;
+        sut.topMixUnitPrice = 3000000;
+
+        gasBlender.addO2 = 4000000;
+        gasBlender.addHe = 5000000;
+        gasBlender.addTop = 6000000;
+
+        sut.calculate();
+
+        const expected: BlendPrice = {
+            o2Price: 4000000000000,
+            hePrice: 10000000000000,
+            topMixPrice: 18000000000000,
+            totalPrice: 32000000000000
+        };
+
+        const result: BlendPrice = {
+            o2Price: sut.o2Price,
+            hePrice: sut.hePrice,
+            topMixPrice: sut.topMixPrice,
+            totalPrice: sut.totalPrice
+        };
+
+        expect(result).toEqual(expected);
+    });
+
+    it('should calculate prices when unit prices are very small and gas amounts are very large values', () => {
+        sut.o2UnitPrice = 0.000001;
+        sut.heUnitPrice = 0.000002;
+        sut.topMixUnitPrice = 0.000003;
+
+        gasBlender.addO2 = 4000000;
+        gasBlender.addHe = 5000000;
+        gasBlender.addTop = 6000000;
+
+        sut.calculate();
+
+        const expected: BlendPrice = {
+            o2Price: 4,
+            hePrice: 10,
+            topMixPrice: 18,
+            totalPrice: 32
+        };
+
+        const result: BlendPrice = {
+            o2Price: sut.o2Price,
+            hePrice: sut.hePrice,
+            topMixPrice: sut.topMixPrice,
+            totalPrice: sut.totalPrice
+        };
+
+        expect(result).toEqual(expected);
+    });
+});

projects/planner/src/app/shared/blend-pricing.service.ts

@@ -1,7 +1,5 @@
 import { Injectable } from '@angular/core';
-import {
-    BlendPricing
-} from 'scuba-physics';
+import {BlendPricing} from 'scuba-physics';
 import { GasBlenderService } from './gas-blender.service';
 
 @Injectable()