aft-core
v12.1.1
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Automation Framework for Testing (AFT) package supporting JavaScript unit, integration and functional testing
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AFT-Core
the base Automated Functional Testing (AFT) library providing support for Plugins, configuration, and helper classes and functions
Installation
> npm i aft-core
Configuration
the aft-core
package contains the aftConfig
constant class (instance of new AftConfig()
) for reading in configuration an aftconfig.json
, aftconfig.js
, aftconfig.cjs
or aftconfig.mjs
file at the project root. this configuration can be read as a top-level field using aftConfig.get('field_name')
or aftConfig.get('field_name', defaultVal)
and can also be set without actually modifying the values in your aftconfig.json
using aftConfig.set('field_name', val)
. additionally, configuration classes can be read using AftConfig
with the aftConfig.getSection(ConfigClass)
which will read from your aftconfig.json
file for a field named ConfigClass
NOTE:
- when a new instance of
AftConfig
is created thedotenv
package is run and any.env
file found at your project root (process.cwd()
) will be processed into your environment variables making it easier to load values when developing and testing locally.- if using a javascript
aftconfig
file, you must export the config object usingmodule.exports = { ... }
Ex: with an aftconfig.json
containing:
{
"SomeCustomClassConfig": {
"configField1": %your_env_var%,
"configField2": "some-value",
"configField3": ["foo", true, 10],
"configField4": "%another_env_var%"
}
}
and with the following environment variables set:
> export your_env_var="42"
> export another_env_var="the meaning of everything"
and a config class of:
export class SomeCustomClassConfig {
configField1: number = 0;
configField2: string = 'another_default_value';
configField3: Array<string | boolean | number> = ['default_val'];
configField4: string = 'last_default_value';
}
can be accessed using an AftConfig
instance as follows:
const config = aftConfig.getSection(SomeCustomClassConfig); // or new AftConfig().getSection(SomeCustomClassConfig);
config.configField1; // returns 42
config.configField2; // returns "some-value"
config.configField3; // returns ["foo", true, 10] as an array
config.configField4; // returns "the meaning of everything"
and if you wish to entirely disregard the configuration specified in your aftconfig.json
file you can use the following (still based on the above example):
const config = new AftConfig({
SomeCustomClassConfig: {
configField1: 42
}
});
config.configField1; // returns 42
config.configField2; // returns "another_default_value"
config.configField3; // returns ["default_val"] as an array
config.configField4; // returns "last_default_value"
Helpers
the aft-core
package contains several helper and utility classes, interfaces and functions to make functional testing and test development easier. These include:
- rand - random string, boolean, number and uuid generation
- convert - string manipulation like Base64 encode / decode and replacement
- ellide - string elliding supporting beginning, middle and end ellipsis
- Err - a
module
that can run functions in atry-catch
with optional logging as well as provide formatted string outputs fromError
objects - using - automatically call the
dispose
function of a class that implements theDisposable
interface when done - MachineInfo - get details of the host machine and user running the tests
- CacheMap - a
Map
implementation that stores values with expirations where expired items will not be returned and are pruned from theMap
automatically. TheCacheMap
can also optionally store its data on the filesystem allowing for other running node processes to read from the same cache data (e.g. sharded parallel testing) - FileSystemMap - a
Map
implementation that stores its values in a file on the filesystem allowing multiple node processes to share the map data or to persist the data over multiple iterations - fileio - a constant class providing file system
write
andreadAs<T>
functions to simplify file operations - wait - constant class providing
wait.forResult<T>(...): Promise<T>
,wait.forDuration(number)
, andwait.until(number | Date): Promise<void>
functions to allow for non-thread-locking waits - retry - constant class providing
retry<T>(retryable).until(condition): Promise<T>
async function that will retry a givenretryable
function until it passes a condition or a specified number of attempts or elapsed time is exceeded - AftTest - see: Testing with AftTest section below
Custom Types
aft-core
also comes with some helpful types that can make building automated tests a bit easier such as:
- Action<T> - a function accepting one typed argument
T
and returningvoid
- Func<T, Tr> - a function accepting one typed argument
T
and returning a specified typeTr
- Class<T> - a class of type
T
accepting 0 or more arguments on the constructor - ProcessingResult - a more expressive return value that can be used when you want both a boolean success and data as a result
- JsonObject - an object that can be serialised and deserialised into a Javascript Object without loss of data
- JsonKey - a value that can be used as a valid JSON object key
- JsonValue - value that can be used as a valid JSON object value
- Merge<T1, T2, T3 = {}, T4 = {}, T5 = {}, T6 = {}> - a type that can be used to create merged types (types made up of 2 or more types)
Plugins
Example Reporting Plugin
to create your own simple reporting plugin that stores all logs until the finalise
function is called you would implement the code below.
NOTE:
configuration for the below can be added in a object in the
aftconfig.json
namedOnDisposeConsoleReportingPluginConfig
and optionally containing values for the supported properties of theOnDisposeConsoleReportingPluginConfig
class
export class OnDisposeConsoleReportingPluginConfig {
maxLogLines: number = Infinity;
logLevel: LogLevel = 'warn';
};
export class OnDisposeConsoleReportingPlugin extends ReportingPlugin {
public override get logLevel(): LogLevel { return this._lvl; }
private readonly _lvl: LogLevel;
private readonly _logs: Map<string, Array<LogMessageData>>;
private readonly _maxLines: number;
constructor(aftCfg?: AftConfig) {
super(aftCfg);
const cfg = this.aftCfg.getSection(OnDisposeConsoleReportingPluginConfig);
this._lvl = cfg.logLevel ?? 'warn';
if (this.enabled) {
this._logs = new Map<string, Array<LogMessageData>>();
}
}
override initialise = async (name: string): Promise<void> => {
if (!this._logs.has(name)) {
this._logs.set(name, new Array<LogMessageData>());
}
}
override log = async (logData: LogMessageData): Promise<void> => {
if (this.enabled) {
if (LogLevel.toValue(level) >= LogLevel.toValue(this.logLevel) && level != 'none') {
const namedLogs: Array<LogMessageData> = this._logs.get(name);
namedLogs.push({name, level, message, args: data});
while (namedLogs.length > this.maxLogLines) {
namedLogs.shift();
}
}
}
}
override submitResult = async (result: TestResult): Promise<void> => {
/* ignore */
}
override finalise = async (name: string): Promise<void> => {
if (this.enabled) {
const namedLogs = this._logs.get(name);
while (namedLogs?.length > 0) {
let data = namedLogs.shift();
aftLogger.log({name: data.name, level: data.level, message: data.message, args: data.args});
});
aftLogger.log({name: this.constructor.name, level: 'debug', message: `finalised '${name}'`});
}
}
}
Example PolicyPlugin (TestRail)
export class TestRailConfig {
username: string;
password: string;
url: string = 'https://you.testrail.io';
projectId: number;
suiteIds: Array<number> = new Array<number>();
planId: number;
enabled: boolean = false;
}
export class TestRailPolicyPlugin extends PolicyPlugin {
public override get enabled(): boolean { return this._enabled; }
private readonly _client: TestRailClient;
private readonly _enabled: boolean;
constructor(aftCfg?: AftConfig) {
super(aftCfg);
const cfg = this.aftCfg.getSection(TestRailConfig);
this._enabled = cfg.enabled ?? false;
if (this.enabled) {
this._client = new TestRailClient(this.aftCfg);
}
}
override shouldRun = async (testId: string): Promise<ProcessingResult> => {
const result = await this._client.getLastTestResult(testId);
if (result.status === 'Passed') {
return false; // test alraedy has passing result so don't run
}
return true;
}
}
Integration with javascript test frameworks
the aft-core
package comes with an AftTest
class which can be extended from to allow near seamless integration of AFT's reporting and test execution flow control features. AFT already has packages for integration with a few of the major test frameworks such as Jasmine, Mocha and Jest and these can be used as examples for implementing your own as needed if you are using some other test framework (NOTE: the Mocha integration also works with Cypress).
aft-jasmine-reporter
: aft-jasmine-testaft-mocha-reporter
: aft-mocha-testaft-jest-reporter
: aft-jest-testaft-vitest-reporter
: aft-vitest-test
Testing with AftTest
the AftTest
class and AftTest.verify
functions of aft-core
enable testing with pre-execution filtering based on integration with external test execution policy managers via plugin packages extending the PolicyPlugin
class (see examples above).
// jasmine spec using `aft-jasmine-reporter` package
describe('Sample Test', () => {
it("[C1234][C2345] expect that performActionAsync will return 'result of action'", async () => {
/**
* - for Jest use: `const aft = new AftJestTest(expect);`
* - for Mocha use: `const aft = new AftMochaTest(this);`
* - for Jasmine use: `const aft = new AftJasmineTest();`
* - for Vitest use: `const aft = new AftVitTestTest(ctx);`
*/
await aftJasmineTest(async (t: AftJasmineTest) => {
const feature: FeatureObj = new FeatureObj();
/**
* the `t.verify(actual, expected)` function will compare
* the `actual` with an `expected` using a `VerifyMatcher`
* and if the comparison fails and `haltOnVerifyFailure`
* is `true` (default) it will throw an exception containing
* details of the failure; otherwise it will continue, having
* set the overall `AftTest.status` to `'failed'`
*/
await t.verify(
() => feature.performActionAsync(),
containing('result of action'),
'[C1234] performActionAsync failure'
); // sends `TestResult` with test ID 'C1234'
}); // sends `TestResult` with test ID 'C2345'
});
});
in the above example, the async (t: AftJasmineTest) => ...
function will only be run if a PolicyPlugin
is loaded and returns true
from it's shouldRun(testId: string)
function (or no PolicyPlugin
is loaded). additionally, any logs associated with the above verify
call will use a name
of "Sample Test [C1234][C2345] expect that performActionAsync will return 'result of action'"
resulting in log lines like the following (assuming a failure in the verify
call):
09:14:01 - [Sample Test [C1234][C2345] expect that performActionAsync will return 'result of action'] - TRACE - no PolicyPlugin in use so run all tests
09:14:02 - [Sample Test [C1234][C2345] expect that performActionAsync will return 'result of action'] - FAIL - C1234 - [C1234] performActionAsync failure - expected 'result of action' to be contained in 'invalid data'
09:14:03 - [Sample Test [C1234][C2345] expect that performActionAsync will return 'result of action'] - FAIL - C1234 - expected 'result of action' to be contained in 'invalid data'
NOTE:
the
message
passed to theverify
function can include one or more test IDs similar to thedescription
argument passed to theAftTest
constructor oraftTest
function. when test IDs are supplied theTestResult
(or results) submitted will include the supplied test ID. if no test ID is included or nomessage
argument is supplied then theTestResult
will not include a test ID, but will still affect theAftTest.status
and prevent an additionalTestResult
from being sent at the completion of thetestFunction
execution unless theAftTest
included test IDs in thedescription
as these will then have aTestResult
sent for each test ID.
VerifyMatcher
the t.verify(actual, expected, message?)
function on AftTest
can accept a VerifyMatcher
instance for the expected
value to enhance the comparison capabilities performed by the check. the following VerifyMatcher
types are supported within AFT Core:
equaling
: performs a'=='
test between theactual
andexpected
. ex:await t.verify(0, equaling(false)); // success
exactly
: performs a'==='
test between theactual
andexpected
. ex:await t.verify(0, exactly(false)); // fail
equivalent
: iterates over all keys ofexpected
and compares their type and values to those found onactual
. ex:await t.verify({foo: 'bar', baz: true}, equivalent({foo: 'bar', baz: false})); // fail
between
: verifies that theactual
numerical value is either equal to or between theminimum
andmaximum
expected values. ex:await t.verify(42, between(42, 45)); // success
containing
: verifies that theactual
collection contains theexpected
value. ex:await t.verify([0, 1, 2, 3], containing(2)); // success
matchingProps
: iterates over all keys ofexpected
and compares their type to those found onactual
. this differs fromequivalent
in that the actual values are not part of the comparison. ex:await t.verify({foo: 'bar'}, matchingProps({foo: 'foo'})); // success
havingProps
: verifies that theactual
object contains properties with the specified names and optionally of the specified types. ex:await t.verify({foo: 'bar', baz: true, bog: 42}, havingProps([['foo', 'string'], 'baz'])); // success
havingValue
: verifies that theactual
is not equal tonull
orundefined
. ex:await t.verify(false, havingValue()); // success
greaterThan
: verifies that theactual
numerical value is greater than theexpected
. ex:await t.verify(2, greaterThan(0)); // success
lessThan
: verifies that theactual
numerical value is less than theexpected
. ex:await t.verify(0, lessThan(1)); // success
not
: a special useVerifyMatcher
that negates anyVerifyMatcher
passed into it. ex:await t.verify([0, 1, 2], not(containing(1))); // fails
NOTE:
if no
VerifyMatcher
is supplied thenequaling
is used by default
TestResult
when a AftTest.run()
, aftTest(description, testFunction?, options?)
or AftTest.verify(actual, expected, message?)
function completes a TestResult
is generated and submitted to the ReportingManager
associated with the AftTest
instance using the ReportingManager.submitResult(result)
function (this then sends on to any ReportingPlugin
instances). each TestResult
contains the following fields and data:
// typical TestResult format
{
"testId": "C1234",
"testName": "Sample Test [C1234] verify the thing",
"resultMessage": "thing returned invalid value",
"status": "failed",
"resultId": "9d9ed3b7-a6b7-4e1b-b03a-81704aa718df",
"created": 1715263284960,
"metadata": {
"durationMs": 2345,
"buildName": "USERNAME_MACHINENAME",
"buildNumber": "YYYYMMDD"
}
}
the testId
will be set if specified, otherwise it will not be included (set to undefined
) and the testName
will be the ReportingManager.name
(matches the description
if no reporter
option is passed to the AftTest
constructor). within the metadata
object, the durationMs
, buildName
and buildNumber
cannot be modified, but additional fields can be included by specifying either the additionalMetadata
option passed to the AftTest
constructor or by setting the AftTestConfig.additionalMetadata
config in your aftconfig.json
file which will then be added to each TestResult
submitted.
ex:
// aftconfig.json
{
"AftTestConfig": {
"additionalMetadata": {
"aMetaDataKey": "someMetadataValue",
...
}
}
}