feat: add transformations

Fixes #9

test/logger.spec.ts

@@ -16,23 +16,30 @@ import * as chai from 'chai';
 import {expect} from 'chai';
 import * as chaiAsPromised from 'chai-as-promised';
 import * as chaiSpies from 'chai-spies';
-import {slow, suite, timeout} from 'mocha-typescript';
+import {suite} from 'mocha-typescript';
 import {Logger} from '../src/logger';
+import {AddLogLevel} from '../src/transformations/add-log-level';
 import {DummyTransport} from './dummyTransport';
 
 chai.should();
 chai.use(chaiSpies);
 chai.use(chaiAsPromised);
 
-@suite(timeout(2000), slow(1000))
+@suite()
 export class LoggerSpec {
-  static sandbox: any;
+  static sandbox: ChaiSpies.Sandbox;
 
   static before() {
     LoggerSpec.sandbox = chai.spy.sandbox();
   }
 
   before() {
+    Logger.setTransformations([
+      new AddLogLevel(),
+    ]);
+  }
+
+  after() {
     LoggerSpec.sandbox.restore();
   }
 
@@ -44,6 +51,7 @@ export class LoggerSpec {
   @test
   async error() {
     const spy = LoggerSpec.sandbox.on(console, 'error', () => {
+      // noop
     });
 
     await Logger.error('Foobar');
@@ -56,6 +64,7 @@ export class LoggerSpec {
   @test
   async 'error in productive environment'() {
     const spy = LoggerSpec.sandbox.on(console, 'error', () => {
+      // noop
     });
 
     const nodeEnv = process.env.NODE_ENV;
@@ -84,6 +93,7 @@ export class LoggerSpec {
   @test
   async 'error without output'() {
     const spy = LoggerSpec.sandbox.on(console, 'error', () => {
+      // noop
     });
 
     process.env.STAPPS_LOG_LEVEL = '0';
@@ -98,6 +108,7 @@ export class LoggerSpec {
   @test
   async 'error with Error'() {
     const spy = LoggerSpec.sandbox.on(console, 'error', () => {
+      // noop
     });
 
     await Logger.error(new Error());
@@ -110,6 +121,7 @@ export class LoggerSpec {
   @test
   info() {
     const spy = LoggerSpec.sandbox.on(console, 'info', () => {
+      // noop
     });
 
     Logger.info('Foobar');
@@ -122,6 +134,7 @@ export class LoggerSpec {
   @test
   'info without output'() {
     const spy = LoggerSpec.sandbox.on(console, 'info', () => {
+      // noop
     });
 
     process.env.STAPPS_LOG_LEVEL = '0';
@@ -162,6 +175,7 @@ export class LoggerSpec {
     }).to.throw();
 
     const spy = LoggerSpec.sandbox.on(console, 'warn', () => {
+      // noop
     });
 
     process.env.ALLOW_NO_TRANSPORT = 'true';
@@ -180,6 +194,7 @@ export class LoggerSpec {
   @test
   log() {
     const spy = LoggerSpec.sandbox.on(console, 'log', () => {
+      // noop
     });
 
     Logger.log('Foobar');
@@ -192,6 +207,7 @@ export class LoggerSpec {
   @test
   'log without output'() {
     const spy = LoggerSpec.sandbox.on(console, 'log', () => {
+      // noop
     });
 
     process.env.STAPPS_LOG_LEVEL = '0';
@@ -206,6 +222,7 @@ export class LoggerSpec {
   @test
   ok() {
     const spy = LoggerSpec.sandbox.on(console, 'log', () => {
+      // noop
     });
 
     Logger.ok('Foobar');
@@ -218,6 +235,7 @@ export class LoggerSpec {
   @test
   'ok without output'() {
     const spy = LoggerSpec.sandbox.on(console, 'log', () => {
+      // noop
     });
 
     process.env.STAPPS_LOG_LEVEL = '0';
@@ -226,7 +244,7 @@ export class LoggerSpec {
 
     delete process.env.STAPPS_LOG_LEVEL;
 
-    expect(spy).not.to.have.been.called()
+    expect(spy).not.to.have.been.called();
   }
 
   @test
@@ -240,6 +258,7 @@ export class LoggerSpec {
   @test
   'stringify'() {
     const spy = LoggerSpec.sandbox.on(console, 'log', () => {
+      // noop
     });
 
     Logger.log('foo', 'bar');
@@ -252,10 +271,11 @@ export class LoggerSpec {
   @test
   'stringify object'() {
     const spy = LoggerSpec.sandbox.on(console, 'log', () => {
+      // noop
     });
 
     Logger.log({
-      foo: 'bar'
+      foo: 'bar',
     });
 
     expect(spy).to.have.been.called();
@@ -266,6 +286,7 @@ export class LoggerSpec {
   @test
   warn() {
     const spy = LoggerSpec.sandbox.on(console, 'warn', () => {
+      // noop
     });
 
     Logger.warn('Foobar');
@@ -278,6 +299,7 @@ export class LoggerSpec {
   @test
   'warn without output'() {
     const spy = LoggerSpec.sandbox.on(console, 'warn', () => {
+      // noop
     });
 
     process.env.STAPPS_LOG_LEVEL = '0';
@@ -301,6 +323,7 @@ export class LoggerSpec {
     };
 
     const stub = LoggerSpec.sandbox.on(console, 'info', () => {
+      // noop
     });
 
     Logger.info('Foobar');
@@ -311,4 +334,19 @@ export class LoggerSpec {
 
     expect(stub).not.to.have.been.called();
   }
+
+  @test
+  'output without transformations'() {
+    Logger.setTransformations([]);
+
+    const stub = LoggerSpec.sandbox.on(console, 'log', () => {
+      // noop
+    });
+    const applyTransformationsSpy = LoggerSpec.sandbox.on(Logger, 'applyTransformations');
+
+    Logger.log('Foobar');
+
+    expect(stub).to.have.been.called.with('Foobar');
+    expect(applyTransformationsSpy).not.to.have.been.called;
+  }
 }