Improve Boolean conversion

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@nmshd/typescript-rest",
-  "version": "3.0.5",
+  "version": "3.1.0",
   "description": "A Library to create RESTFul APIs with Typescript",
   "keywords": [
     "API",
@@ -34,7 +34,7 @@
     "lint:prettier": "prettier --check .",
     "lint:tsc": "tsc --noEmit",
     "start": "tsc -w",
-    "pretest": "cross-env NODE_ENV=test npm run build && npm run lint",
+    "pretest": "cross-env NODE_ENV=test npm run build",
     "test": "cross-env NODE_ENV=test jest --config ./test/jest.config.js --coverage --runInBand",
     "test:integration": "cross-env NODE_ENV=test jest --config ./test/jest.config-integration.js --runInBand",
     "test:unit": "cross-env NODE_ENV=test jest --config ./test/jest.config-unit.js",

src/server/parameter-processor.ts

@@ -92,7 +92,10 @@ export class ParameterProcessor {
             case 'Number':
                 return paramValue === undefined ? paramValue : parseFloat(paramValue as string);
             case 'Boolean':
-                return paramValue === undefined ? paramValue : paramValue === 'true' || paramValue === true;
+                if (paramValue === undefined) return paramValue;
+                if (typeof paramValue === 'boolean') return paramValue;
+
+                return paramValue.toLowerCase() === 'true';
             default:
                 let converter = ServerContainer.get().paramConverters.get(paramType);
                 if (!converter) {

test/integration/datatypes.spec.ts

@@ -157,6 +157,23 @@ export class TestParamsService {
     ): string {
         return `limit:${limit}|prefix:${prefix}|expand:${expand}`;
     }
+    @GET
+    @Path('boolean-casing')
+    public testBooleanCasing(
+        @QueryParam('True') True?: boolean,
+        @QueryParam('TRUE') TRUE?: boolean,
+        @QueryParam('False') False?: boolean,
+        @QueryParam('FALSE') FALSE?: boolean
+    ): string {
+        return `True:${True}|TRUE:${TRUE}|False:${False}|FALSE:${FALSE}`;
+    }
+
+    @POST
+    @Path('boolean-as-body-param')
+    @BodyOptions({ strict: false })
+    public testBooleanAsBodyParam(expand: boolean): string {
+        return `expand:${expand}`;
+    }
 
     @POST
     @Path('upload')
@@ -478,6 +495,44 @@ describe('Data Types Tests', () => {
                 }
             );
         });
+
+        it('should handle boolean parameters with different casings', (done) => {
+            request(
+                {
+                    url: 'http://localhost:5674/testparams/boolean-casing?True=True&TRUE=TRUE&False=False&FALSE=FALSE'
+                },
+                (error, response, body) => {
+                    expect(body).toEqual('True:true|TRUE:true|False:false|FALSE:false');
+                    done();
+                }
+            );
+        });
+
+        it('should handle boolean parameters as undefined', (done) => {
+            request(
+                {
+                    url: 'http://localhost:5674/testparams/boolean-casing?True='
+                },
+                (error, response, body) => {
+                    expect(body).toEqual('True:false|TRUE:undefined|False:undefined|FALSE:undefined');
+                    done();
+                }
+            );
+        });
+
+        it('should handle boolean parameters as param in body', (done) => {
+            request.post(
+                {
+                    url: 'http://localhost:5674/testparams/boolean-as-body-param',
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify(true)
+                },
+                (error, response, body) => {
+                    expect(body).toEqual('expand:true');
+                    done();
+                }
+            );
+        });
     });
     describe('Download Service', () => {
         it('should return a file', (done) => {