feat: getParameters fn

Author: dreamorosi

packages/parameters/src/SSMProvider.ts

@@ -1,8 +1,8 @@
 import { BaseProvider, DEFAULT_PROVIDERS } from './BaseProvider';
 import { SSMClient, GetParameterCommand, paginateGetParametersByPath } from '@aws-sdk/client-ssm';
 import type { SSMClientConfig, GetParameterCommandInput, GetParametersByPathCommandInput } from '@aws-sdk/client-ssm';
-import type { SSMGetOptionsInterface } from 'types/SSMProvider';
-import { PaginationConfiguration } from '@aws-sdk/types';
+import type { SSMGetMultipleOptionsInterface, SSMGetOptionsInterface } from 'types/SSMProvider';
+import type { PaginationConfiguration } from '@aws-sdk/types';
 
 class SSMProvider extends BaseProvider {
   public client: SSMClient;
@@ -71,7 +71,16 @@ const getParameter = (name: string, options?: SSMGetOptionsInterface): Promise<u
   return DEFAULT_PROVIDERS.ssm.get(name, options);
 };
 
+const getParameters = (path: string, options?: SSMGetMultipleOptionsInterface): Promise<undefined | Record<string, unknown>> => {
+  if (!DEFAULT_PROVIDERS.hasOwnProperty('ssm')) {
+    DEFAULT_PROVIDERS.ssm = new SSMProvider();
+  }
+
+  return DEFAULT_PROVIDERS.ssm.getMultiple(path, options);
+};
+
 export {
   SSMProvider,
   getParameter,
+  getParameters,
 };

packages/parameters/tests/unit/SSMProvider.test.ts

@@ -194,15 +194,15 @@ describe('Class: SSMProvider', () => {
       mockClient(SSMClient).on(GetParametersByPathCommand)
         .resolvesOnce({
           Parameters: [{
-            'Name':'/foo/bar',
-            'Value':'bar',
+            Name:'/foo/bar',
+            Value:'bar',
           }],
           NextToken: 'someToken',
         })
         .resolves({
           Parameters: [{
-            'Name':'/foo/baz',
-            'Value':'baz',
+            Name:'/foo/baz',
+            Value:'baz',
           }]
         });
       const parameterPath = '/foo';

packages/parameters/tests/unit/getParameters.test.ts

@@ -0,0 +1,71 @@
+/**
+  * Test getParameters function
+ *
+ * @group unit/parameters/SSMProvider/getParameters/function
+ */
+import { DEFAULT_PROVIDERS } from '../../src/BaseProvider';
+import { SSMProvider, getParameters } from '../../src/SSMProvider';
+import { SSMClient, GetParametersByPathCommand } from '@aws-sdk/client-ssm';
+import { mockClient } from 'aws-sdk-client-mock';
+import 'aws-sdk-client-mock-jest';
+
+describe('Function: getParameters', () => {
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  test('when called and a default provider doesn\'t exist, it instantiates one and returns the value', async () => {
+
+    // Prepare
+    const parameterPath = '/foo';
+    const parameterValue = 'bar';
+    const client = mockClient(SSMClient).on(GetParametersByPathCommand).resolves({
+      Parameters: [{
+        Name: '/foo/bar',
+        Value: parameterValue,
+      }],
+    });
+
+    // Act
+    const parameters = await getParameters(parameterPath);
+
+    // Assess
+    expect(client).toReceiveCommandWith(GetParametersByPathCommand, {
+      Path: parameterPath,
+    });
+    expect(parameters).toEqual({
+      bar: parameterValue,
+    });
+
+  });
+  
+  test('when called and a default provider exists, it uses it and returns the value', async () => {
+
+    // Prepare
+    const provider = new SSMProvider();
+    DEFAULT_PROVIDERS.ssm = provider;
+    const parameterPath = '/foo';
+    const parameterValue = 'bar';
+    const client = mockClient(SSMClient).on(GetParametersByPathCommand).resolves({
+      Parameters: [{
+        Name: '/foo/bar',
+        Value: parameterValue,
+      }],
+    });
+
+    // Act
+    const parameters = await getParameters(parameterPath);
+
+    // Assess
+    expect(client).toReceiveCommandWith(GetParametersByPathCommand, {
+      Path: parameterPath,
+    });
+    expect(parameters).toEqual({
+      'bar': parameterValue,
+    });
+    expect(DEFAULT_PROVIDERS.ssm).toBe(provider);
+
+  });
+
+});