Allow users to choose aggregation unit for Breakdown by service

Makefile

@@ -2,6 +2,7 @@ BUILD_DIR = ./dist
 SRC_DIR = ./src
 NODE_MODULES = ./node_modules
 SRC_FILES := $(shell find $(SRC_DIR) -type f)
+BREAKDOWN_PERIOD ?= "yesterday"
 
 .PHONY: all install build run
 
@@ -18,7 +19,7 @@ $(BUILD_DIR): $(SRC_FILES) $(NODE_MODULES)
 build: $(BUILD_DIR)
 
 run: build
-	node ./bin/index.js --profile "${AWS_PROFILE}" --access-key "${ACCESS_KEY}" --secret-key "${SECRET_KEY}" --role-arn "${ROLE_ARN}" --region "${AWS_REGION}" -S $(SLACK_TOKEN_AWS_COST_CLI) -C $(SLACK_CHANNEL_ID)
+	node ./bin/index.js --profile "${AWS_PROFILE}" --access-key "${ACCESS_KEY}" --secret-key "${SECRET_KEY}" --role-arn "${ROLE_ARN}" --region "${AWS_REGION}" -S "${SLACK_TOKEN_AWS_COST_CLI}" -C "${SLACK_CHANNEL_ID}" --breakdown-period "${BREAKDOWN_PERIOD}"
 
 test:
 	pnpm test

jest.config.cjs

@@ -10,6 +10,10 @@ var esmModules = [
   'is-interactive',
   'stdin-discarder',
   'aws-sdk-client-mock',
+  'node-fetch',
+  'data-uri-to-buffer',
+  'fetch-blob',
+  'formdata-polyfill',
 ];
 
 module.exports = {

readme.md

@@ -47,6 +47,7 @@ $ aws-cost --help
 
     -S, --slack-token [token]      Slack token for the slack message
     -C, --slack-channel [channel]  Slack channel to post the message to
+    -P, --breakdown-period [period] Unit period to show service breakdown (yesterday|last7Days|thisMonth|lastMonth)')
 
     -v, --version                  Get the version of the CLI
     -h, --help                     Get the help of the CLI
@@ -216,47 +217,47 @@ If you need to use Role-Based Access Control (RBAC), you will need to configure
 
 1. **Provider Role**
 
-   This role provides the necessary permissions for `aws-cost-cli`. It requires the above permissions policy and the following trust policy.
+This role provides the necessary permissions for `aws-cost-cli`. It requires the above permissions policy and the following trust policy.
 
-   **Trust Policy**
+**Trust Policy**
 
-   Replace `arn:aws:iam::YOUR_ACCOUNT_ID:role/YourConsumerRole` with the ARN of the consumer role.
+Replace `arn:aws:iam::YOUR_ACCOUNT_ID:role/YourConsumerRole` with the ARN of the consumer role.
 
-   ```json
-   {
-     "Version": "2012-10-17",
-     "Statement": [
-       {
-         "Effect": "Allow",
-         "Principal": {
-           "AWS": "arn:aws:iam::YOUR_ACCOUNT_ID:role/YourConsumerRole"
-         },
-         "Action": "sts:AssumeRole"
-       }
-     ]
-   }
-   ```
+```json
+{
+  "Version": "2012-10-17",
+  "Statement": [
+    {
+      "Effect": "Allow",
+      "Principal": {
+        "AWS": "arn:aws:iam::YOUR_ACCOUNT_ID:role/YourConsumerRole"
+      },
+      "Action": "sts:AssumeRole"
+    }
+  ]
+}
+```
 
 2. **Consumer Role**
 
-   This role is used by the user or service (such as GitHub Actions) that needs to assume the provider role to access cost information. It requires the following permissions policy.
+This role is used by the user or service (such as GitHub Actions) that needs to assume the provider role to access cost information. It requires the following permissions policy.
 
-   **Permissions Policy**
+**Permissions Policy**
 
-   Replace `arn:aws:iam::YOUR_ACCOUNT_ID:role/YourProviderRole` with the ARN of the provider role.
+Replace `arn:aws:iam::YOUR_ACCOUNT_ID:role/YourProviderRole` with the ARN of the provider role.
 
-   ```json
-   {
-     "Version": "2012-10-17",
-     "Statement": [
-       {
-         "Effect": "Allow",
-         "Action": "sts:AssumeRole",
-         "Resource": "arn:aws:iam::YOUR_ACCOUNT_ID:role/YourProviderRole"
-       }
-     ]
-   }
-   ```
+```json
+{
+  "Version": "2012-10-17",
+  "Statement": [
+    {
+      "Effect": "Allow",
+      "Action": "sts:AssumeRole",
+      "Resource": "arn:aws:iam::YOUR_ACCOUNT_ID:role/YourProviderRole"
+    }
+  ]
+}
+```
 
 Please also note that this tool uses AWS Cost Explorer under the hood which [costs $0.01 per request](https://aws.amazon.com/aws-cost-management/aws-cost-explorer/pricing/).
 

src/cost.test.ts

@@ -1,6 +1,7 @@
 import AWS from 'aws-sdk';
 import { AWSConfig } from './config';
 import { getRawCostByService, getTotalCosts } from './cost';
+import { generateMockedCostByService } from './testUtils';
 import AWSMock from 'aws-sdk-mock';
 import dayjs from 'dayjs';
 
@@ -10,57 +11,6 @@ const costDataLength = 65;
 const fixedToday = '2024-05-11'; // cost of 'this month' will be sum of 10 days from May 1 to May 10 ('today' is omitted because its cost is incomplete)
 const fixedFirstDay = dayjs(fixedToday).subtract(costDataLength, 'day');
 
-const generateMockPricingData = () => {
-  const resultsByTime = [];
-  for (let i = 0; i < costDataLength; i++) {
-    const date = dayjs(fixedFirstDay).add(i, 'day').format('YYYY-MM-DD');
-    const month = dayjs(date).month(); // 0-indexed (0 = January, 1 = February, etc.)
-    let service1Cost;
-
-    switch (month) {
-      case 2: // March
-        service1Cost = 0.9;
-        break;
-      case 3: // April
-        service1Cost = 1.0; // Total cost of service1 in April will be 30.00
-        break;
-      case 4: // May
-        service1Cost = 1.1;
-        break;
-      default:
-        service1Cost = 0.0; // Default cost if none of the above
-    }
-
-    resultsByTime.push({
-      TimePeriod: {
-        Start: date,
-        End: dayjs(date).add(1, 'day').format('YYYY-MM-DD'),
-      },
-      Groups: [
-        {
-          Keys: ['service1'],
-          Metrics: {
-            UnblendedCost: {
-              Amount: String(service1Cost),
-              Unit: 'USD',
-            },
-          },
-        },
-        {
-          Keys: ['service2'],
-          Metrics: {
-            UnblendedCost: {
-              Amount: String(service1Cost * 100),
-              Unit: 'USD',
-            },
-          },
-        },
-      ],
-    });
-  }
-  return { ResultsByTime: resultsByTime };
-};
-
 describe('Cost Functions', () => {
   beforeAll(() => {
     AWSMock.setSDKInstance(AWS);
@@ -90,10 +40,13 @@ describe('Cost Functions', () => {
         region: 'us-east-1',
       };
 
-      const mockPricingData = generateMockPricingData();
+      const mockedPricingData = generateMockedCostByService(
+        fixedToday,
+        costDataLength,
+      );
 
       AWSMock.mock('CostExplorer', 'getCostAndUsage', (params, callback) => {
-        callback(null, mockPricingData);
+        callback(null, mockedPricingData);
       });
 
       const rawCostByService = await getRawCostByService(awsConfig);
@@ -142,10 +95,13 @@ describe('Cost Functions', () => {
         region: 'us-east-1',
       };
 
-      const mockPricingData = generateMockPricingData();
+      const mockedPricingData = generateMockedCostByService(
+        fixedToday,
+        costDataLength,
+      );
 
       AWSMock.mock('CostExplorer', 'getCostAndUsage', (params, callback) => {
-        callback(null, mockPricingData);
+        callback(null, mockedPricingData);
       });
 
       const totalCosts = await getTotalCosts(awsConfig);
@@ -178,6 +134,8 @@ describe('Cost Functions', () => {
         },
       };
 
+      console.log(expectedTotalCosts);
+
       const roundToTwoDecimals = (num: number) => Math.round(num * 100) / 100;
 
       Object.keys(totalCosts.totals).forEach((key) => {

src/cost.ts

@@ -180,3 +180,9 @@ export async function getTotalCosts(awsConfig: AWSConfig): Promise<TotalCosts> {
 
   return totals;
 }
+
+if (process.env.NODE_ENV === 'test') {
+  Object.assign(module.exports, {
+    calculateServiceTotals,
+  });
+}

src/index.ts

@@ -36,6 +36,10 @@ program
     '-C, --slack-channel [channel]',
     'Channel to which the slack integration should post',
   )
+  .option(
+    '-P, --breakdown-period [period]',
+    'Unit period to show service breakdown (yesterday|last7Days|thisMonth|lastMonth)',
+  )
   // Other options
   .option('-v, --version', 'Get the version of the CLI')
   .option('-h, --help', 'Get the help of the CLI')
@@ -58,6 +62,7 @@ type OptionsType = {
   // Slack token
   slackToken: string;
   slackChannel: string;
+  breakdownPeriod: string;
   // Other options
   help: boolean;
 };
@@ -98,5 +103,6 @@ if (options.slackToken && options.slackChannel) {
     options.summary,
     options.slackToken,
     options.slackChannel,
+    options.breakdownPeriod,
   );
 }

src/printers/slack.test.ts

@@ -0,0 +1,78 @@
+import AWS from 'aws-sdk';
+import { AWSConfig } from './config';
+import { formatServiceBreakdown } from './slack';
+import { generateMockedCostByService } from '../testUtils';
+import { getTotalCosts } from '../cost';
+import AWSMock from 'aws-sdk-mock';
+
+const costDataLength = 65;
+const fixedToday = '2024-05-11'; // cost of 'this month' will be sum of 10 days from May 1 to May 10 ('today' is omitted because its cost is incomplete)
+
+const awsConfig: AWSConfig = {
+  credentials: {
+    accessKeyId: 'testAccessKeyId',
+    secretAccessKey: 'testSecretAccessKey',
+    sessionToken: 'testSessionToken',
+  },
+  region: 'us-east-1',
+};
+
+const mockedCostByService = generateMockedCostByService(
+  fixedToday,
+  costDataLength,
+);
+
+beforeAll(() => {
+  AWSMock.setSDKInstance(AWS);
+});
+
+afterAll(() => {
+  AWSMock.restore();
+});
+
+beforeEach(() => {
+  jest.useFakeTimers('modern');
+  jest.setSystemTime(new Date(fixedToday).getTime());
+});
+
+afterEach(() => {
+  jest.useRealTimers();
+});
+
+AWSMock.mock('CostExplorer', 'getCostAndUsage', (params, callback) => {
+  callback(null, mockedCostByService);
+});
+
+describe('formatServiceBreakdown', () => {
+  it('should return service breakdown of "yesterday"', async () => {
+    const totalCosts = await getTotalCosts(awsConfig);
+    const result = formatServiceBreakdown(totalCosts, 'yesterday');
+
+    // cost value is defined in generateMockedCostByService
+    expect(result).toEqual('> service2: `$110.00`\n' + '> service1: `$1.10`');
+  });
+
+  it('should return service breakdown of "Last 7 days"', async () => {
+    const totalCosts = await getTotalCosts(awsConfig);
+    const result = formatServiceBreakdown(totalCosts, 'last7Days');
+
+    // cost value is defined in generateMockedCostByService
+    expect(result).toEqual('> service2: `$770.00`\n' + '> service1: `$7.70`');
+  });
+
+  it('should return service breakdown of "This Month"', async () => {
+    const totalCosts = await getTotalCosts(awsConfig);
+    const result = formatServiceBreakdown(totalCosts, 'thisMonth');
+
+    // cost value is defined in generateMockedCostByService
+    expect(result).toEqual('> service2: `$1100.00`\n' + '> service1: `$11.00`');
+  });
+
+  it('should return service breakdown of "Last Month"', async () => {
+    const totalCosts = await getTotalCosts(awsConfig);
+    const result = formatServiceBreakdown(totalCosts, 'lastMonth');
+
+    // cost value is defined in generateMockedCostByService
+    expect(result).toEqual('> service2: `$3000.00`\n' + '> service1: `$30.00`');
+  });
+});