test: add tests for body encoding

Author: Vinzent03

packages/functions_client/test/custom_http_client.dart

@@ -14,7 +14,7 @@ class CustomHttpClient extends BaseClient {
     // Add request to receivedRequests list.
     receivedRequests = receivedRequests..add(request);
 
-    if (request.url.path.endsWith("function")) {
+    if (request.url.path.endsWith("error-function")) {
       //Return custom status code to check for usage of this client.
       return StreamedResponse(
         Stream.value(utf8.encode(jsonEncode({"key": "Hello World"}))),

packages/functions_client/test/functions_dart_test.dart

@@ -20,22 +20,22 @@ void main() {
     });
     test('function throws', () async {
       try {
-        await functionsCustomHttpClient.invoke('function');
+        await functionsCustomHttpClient.invoke('error-function');
         fail('should throw');
       } on FunctionException catch (e) {
         expect(e.status, 420);
       }
     });
 
     test('function call', () async {
-      final res = await functionsCustomHttpClient.invoke('function1');
+      final res = await functionsCustomHttpClient.invoke('function');
       expect(res.data, {'key': 'Hello World'});
       expect(res.status, 200);
     });
 
     test('function call with query parameters', () async {
       final res = await functionsCustomHttpClient
-          .invoke('function1', queryParameters: {'key': 'value'});
+          .invoke('function', queryParameters: {'key': 'value'});
 
       final request = customHttpClient.receivedRequests.last;
 
@@ -48,7 +48,7 @@ void main() {
       final fileName = "file.txt";
       final fileContent = "Hello World";
       final res = await functionsCustomHttpClient.invoke(
-        'function1',
+        'function',
         queryParameters: {'key': 'value'},
         files: [
           MultipartFile.fromString(fileName, fileContent),
@@ -78,7 +78,7 @@ void main() {
       );
 
       await client.dispose();
-      final res = await client.invoke('function1');
+      final res = await client.invoke('function');
       expect(res.data, {'key': 'Hello World'});
     });
 
@@ -90,5 +90,60 @@ void main() {
             ['a', 'b', 'c'],
           ));
     });
+
+    group('body encoding', () {
+      test('integer properly encoded', () async {
+        await functionsCustomHttpClient.invoke('function', body: 42);
+
+        final req = customHttpClient.receivedRequests.last;
+        expect(req, isA<Request>());
+
+        req as Request;
+        expect(req.body, '42');
+      });
+
+      test('double is properly encoded', () async {
+        await functionsCustomHttpClient.invoke('function', body: 42.9);
+
+        final req = customHttpClient.receivedRequests.last;
+        expect(req, isA<Request>());
+
+        req as Request;
+        expect(req.body, '42.9');
+      });
+
+      test('string is properly encoded', () async {
+        await functionsCustomHttpClient.invoke('function', body: 'ExampleText');
+
+        final req = customHttpClient.receivedRequests.last;
+        expect(req, isA<Request>());
+
+        req as Request;
+        expect(req.body, 'ExampleText');
+      });
+
+      test('list is properly encoded', () async {
+        await functionsCustomHttpClient.invoke('function', body: [1, 2, 3]);
+
+        final req = customHttpClient.receivedRequests.last;
+        expect(req, isA<Request>());
+
+        req as Request;
+        expect(req.body, '[1,2,3]');
+      });
+
+      test('map is properly encoded', () async {
+        await functionsCustomHttpClient.invoke(
+          'function',
+          body: {'thekey': 'thevalue'},
+        );
+
+        final req = customHttpClient.receivedRequests.last;
+        expect(req, isA<Request>());
+
+        req as Request;
+        expect(req.body, '{"thekey":"thevalue"}');
+      });
+    });
   });
 }