diff --git a/src/declarations/Declaration.ts b/src/declarations/Declaration.ts
index adc7bc1..f685513 100644
--- a/src/declarations/Declaration.ts
+++ b/src/declarations/Declaration.ts
@@ -209,3 +209,20 @@ export interface StaticDeclaration extends Declaration {
      */
     isStatic: boolean;
 }
+
+/**
+ * Interface for possible async declarations.
+ *
+ * @export
+ * @interface AsyncDeclaration
+ * @extends {Declaration}
+ */
+export interface AsyncDeclaration extends Declaration {
+    /**
+     * Defines if the declaration is async or not.
+     *
+     * @type {boolean}
+     * @memberof AsyncDeclaration
+     */
+    isAsync: boolean;
+}
diff --git a/src/declarations/FunctionDeclaration.ts b/src/declarations/FunctionDeclaration.ts
index f4b6a18..99015ff 100644
--- a/src/declarations/FunctionDeclaration.ts
+++ b/src/declarations/FunctionDeclaration.ts
@@ -1,4 +1,4 @@
-import { CallableDeclaration, ExportableDeclaration } from './Declaration';
+import { AsyncDeclaration, CallableDeclaration, ExportableDeclaration } from './Declaration';
 import { ParameterDeclaration } from './ParameterDeclaration';
 import { VariableDeclaration } from './VariableDeclaration';
 
@@ -11,13 +11,14 @@ import { VariableDeclaration } from './VariableDeclaration';
  * @implements {CallableDeclaration}
  * @implements {ExportableDeclaration}
  */
-export class FunctionDeclaration implements CallableDeclaration, ExportableDeclaration {
+export class FunctionDeclaration implements AsyncDeclaration, CallableDeclaration, ExportableDeclaration {
     public parameters: ParameterDeclaration[] = [];
     public variables: VariableDeclaration[] = [];
 
     constructor(
         public name: string,
         public isExported: boolean,
+        public isAsync: boolean,
         public type?: string,
         public start?: number,
         public end?: number,
diff --git a/src/declarations/MethodDeclaration.ts b/src/declarations/MethodDeclaration.ts
index a5cd267..2a4bc67 100644
--- a/src/declarations/MethodDeclaration.ts
+++ b/src/declarations/MethodDeclaration.ts
@@ -1,5 +1,6 @@
 import {
     AbstractDeclaration,
+    AsyncDeclaration,
     CallableDeclaration,
     OptionalDeclaration,
     ScopedDeclaration,
@@ -22,6 +23,7 @@ import { VariableDeclaration } from './VariableDeclaration';
  */
 export class MethodDeclaration implements
     AbstractDeclaration,
+    AsyncDeclaration,
     CallableDeclaration,
     OptionalDeclaration,
     ScopedDeclaration,
@@ -38,6 +40,7 @@ export class MethodDeclaration implements
         public type: string | undefined,
         public isOptional: boolean,
         public isStatic: boolean,
+        public isAsync: boolean,
         public start?: number,
         public end?: number,
     ) { }
diff --git a/src/node-parser/class-parser.ts b/src/node-parser/class-parser.ts
index 9c9d1cc..d0cedd3 100644
--- a/src/node-parser/class-parser.ts
+++ b/src/node-parser/class-parser.ts
@@ -204,6 +204,7 @@ export function parseClass(tsResource: Resource, node: ClassDeclaration): void {
                     getNodeType(o.type),
                     !!o.questionToken,
                     containsModifier(o, SyntaxKind.StaticKeyword),
+                    containsModifier(o, SyntaxKind.AsyncKeyword),
                     o.getStart(),
                     o.getEnd(),
                 );
diff --git a/src/node-parser/function-parser.ts b/src/node-parser/function-parser.ts
index fb10c5d..2f6a8b2 100644
--- a/src/node-parser/function-parser.ts
+++ b/src/node-parser/function-parser.ts
@@ -30,7 +30,13 @@ import {
     isPropertySignature,
 } from '../type-guards/TypescriptGuards';
 import { parseIdentifier } from './identifier-parser';
-import { getDefaultResourceIdentifier, getNodeType, isNodeDefaultExported, isNodeExported } from './parse-utilities';
+import {
+    containsModifier,
+    getDefaultResourceIdentifier,
+    getNodeType,
+    isNodeDefaultExported,
+    isNodeExported,
+} from './parse-utilities';
 import { parseVariable } from './variable-parser';
 
 /**
@@ -137,7 +143,12 @@ export function parseMethodParams(
 export function parseFunction(resource: Resource, node: FunctionDeclaration): void {
     const name = node.name ? node.name.text : getDefaultResourceIdentifier(resource);
     const func = new TshFunction(
-        name, isNodeExported(node), getNodeType(node.type), node.getStart(), node.getEnd(),
+        name,
+        isNodeExported(node),
+        containsModifier(node, SyntaxKind.AsyncKeyword),
+        getNodeType(node.type),
+        node.getStart(),
+        node.getEnd(),
     );
     if (isNodeDefaultExported(node)) {
         func.isExported = false;
diff --git a/src/node-parser/interface-parser.ts b/src/node-parser/interface-parser.ts
index e4fb8f0..f5269ef 100644
--- a/src/node-parser/interface-parser.ts
+++ b/src/node-parser/interface-parser.ts
@@ -57,6 +57,7 @@ export function parseInterface(resource: Resource, node: InterfaceDeclaration):
                     getNodeType(o.type),
                     !!o.questionToken,
                     containsModifier(o, SyntaxKind.StaticKeyword),
+                    containsModifier(o, SyntaxKind.AsyncKeyword),
                     o.getStart(),
                     o.getEnd(),
                 );
diff --git a/test/__snapshots__/TypescriptParser.spec.ts.snap b/test/__snapshots__/TypescriptParser.spec.ts.snap
index a0a515e..e6b5526 100644
--- a/test/__snapshots__/TypescriptParser.spec.ts.snap
+++ b/test/__snapshots__/TypescriptParser.spec.ts.snap
@@ -23,6 +23,7 @@ ClassDeclaration {
     MethodDeclaration {
       "end": 203,
       "isAbstract": false,
+      "isAsync": false,
       "isOptional": false,
       "isStatic": false,
       "name": "method1",
@@ -35,6 +36,7 @@ ClassDeclaration {
     MethodDeclaration {
       "end": 237,
       "isAbstract": false,
+      "isAsync": false,
       "isOptional": false,
       "isStatic": false,
       "name": "method2",
@@ -47,6 +49,7 @@ ClassDeclaration {
     MethodDeclaration {
       "end": 300,
       "isAbstract": false,
+      "isAsync": false,
       "isOptional": false,
       "isStatic": false,
       "name": "method3",
@@ -132,6 +135,7 @@ ClassDeclaration {
     MethodDeclaration {
       "end": 55,
       "isAbstract": false,
+      "isAsync": false,
       "isOptional": false,
       "isStatic": false,
       "name": "method1",
@@ -144,6 +148,7 @@ ClassDeclaration {
     MethodDeclaration {
       "end": 100,
       "isAbstract": true,
+      "isAsync": false,
       "isOptional": false,
       "isStatic": false,
       "name": "abstractMethod",
@@ -259,6 +264,7 @@ Array [
   MethodDeclaration {
     "end": 1251,
     "isAbstract": false,
+    "isAsync": false,
     "isOptional": false,
     "isStatic": false,
     "name": "objMethod",
@@ -298,6 +304,7 @@ Array [
   MethodDeclaration {
     "end": 1307,
     "isAbstract": false,
+    "isAsync": false,
     "isOptional": false,
     "isStatic": false,
     "name": "arrMethod",
@@ -337,6 +344,7 @@ Array [
   MethodDeclaration {
     "end": 1386,
     "isAbstract": false,
+    "isAsync": false,
     "isOptional": false,
     "isStatic": false,
     "name": "objAndArrMethod",
@@ -478,6 +486,7 @@ ClassDeclaration {
     MethodDeclaration {
       "end": 1621,
       "isAbstract": false,
+      "isAsync": false,
       "isOptional": false,
       "isStatic": true,
       "name": "method",
@@ -490,6 +499,7 @@ ClassDeclaration {
     MethodDeclaration {
       "end": 1660,
       "isAbstract": false,
+      "isAsync": false,
       "isOptional": false,
       "isStatic": false,
       "name": "methodNonStatic",
@@ -546,6 +556,7 @@ EnumDeclaration {
 exports[`TypescriptParser Declaration parsing Functions should parse a function correctly 1`] = `
 FunctionDeclaration {
   "end": 84,
+  "isAsync": false,
   "isExported": false,
   "name": "function1",
   "parameters": Array [
@@ -574,6 +585,7 @@ FunctionDeclaration {
 exports[`TypescriptParser Declaration parsing Functions should parse an exported function correctly 1`] = `
 FunctionDeclaration {
   "end": 219,
+  "isAsync": false,
   "isExported": true,
   "name": "function2",
   "parameters": Array [
@@ -736,6 +748,7 @@ InterfaceDeclaration {
     MethodDeclaration {
       "end": 93,
       "isAbstract": true,
+      "isAsync": false,
       "isOptional": false,
       "isStatic": false,
       "name": "method1",
@@ -748,6 +761,7 @@ InterfaceDeclaration {
     MethodDeclaration {
       "end": 128,
       "isAbstract": true,
+      "isAsync": false,
       "isOptional": false,
       "isStatic": false,
       "name": "method2",
@@ -799,6 +813,7 @@ InterfaceDeclaration {
     MethodDeclaration {
       "end": 247,
       "isAbstract": true,
+      "isAsync": false,
       "isOptional": false,
       "isStatic": false,
       "name": "method1",
@@ -832,6 +847,7 @@ InterfaceDeclaration {
     MethodDeclaration {
       "end": 284,
       "isAbstract": true,
+      "isAsync": false,
       "isOptional": false,
       "isStatic": false,
       "name": "method2",
@@ -897,6 +913,7 @@ InterfaceDeclaration {
     MethodDeclaration {
       "end": 680,
       "isAbstract": true,
+      "isAsync": false,
       "isOptional": false,
       "isStatic": false,
       "name": "nonOptionalFunction2",
@@ -909,6 +926,7 @@ InterfaceDeclaration {
     MethodDeclaration {
       "end": 712,
       "isAbstract": true,
+      "isAsync": false,
       "isOptional": true,
       "isStatic": false,
       "name": "optionalFunction3",
@@ -990,6 +1008,7 @@ Module {
   "declarations": Array [
     FunctionDeclaration {
       "end": 62,
+      "isAsync": false,
       "isExported": true,
       "name": "modFunc",
       "parameters": Array [],
@@ -1273,6 +1292,7 @@ ObjectBoundParameterDeclaration {
 exports[`TypescriptParser Declaration parsing Parameters should parse some mixed parameters (all above) 1`] = `
 FunctionDeclaration {
   "end": 654,
+  "isAsync": false,
   "isExported": false,
   "name": "mixed",
   "parameters": Array [
@@ -1846,6 +1866,7 @@ File {
         MethodDeclaration {
           "end": 304,
           "isAbstract": false,
+          "isAsync": false,
           "isOptional": false,
           "isStatic": false,
           "name": "render",
@@ -1912,6 +1933,7 @@ Array [
           MethodDeclaration {
             "end": 304,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "render",
@@ -1978,6 +2000,7 @@ File {
         MethodDeclaration {
           "end": 304,
           "isAbstract": false,
+          "isAsync": false,
           "isOptional": false,
           "isStatic": false,
           "name": "render",
@@ -2052,6 +2075,7 @@ File {
         MethodDeclaration {
           "end": 93,
           "isAbstract": false,
+          "isAsync": false,
           "isOptional": false,
           "isStatic": false,
           "name": "doSomething",
@@ -2112,6 +2136,7 @@ Array [
           MethodDeclaration {
             "end": 93,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomething",
@@ -2172,6 +2197,7 @@ File {
         MethodDeclaration {
           "end": 93,
           "isAbstract": false,
+          "isAsync": false,
           "isOptional": false,
           "isStatic": false,
           "name": "doSomething",
@@ -2273,6 +2299,7 @@ File {
         MethodDeclaration {
           "end": 142,
           "isAbstract": false,
+          "isAsync": false,
           "isOptional": false,
           "isStatic": false,
           "name": "test",
diff --git a/test/_workspace/typescript-parser/async.ts b/test/_workspace/typescript-parser/async.ts
new file mode 100644
index 0000000..90aa258
--- /dev/null
+++ b/test/_workspace/typescript-parser/async.ts
@@ -0,0 +1,11 @@
+class Class1 {
+    public static async staticAsync() { }
+    public func(): void { }
+    public async asyncFunc(): Promise<void> { }
+    public async asyncFuncWithoutType() { }
+}
+
+function func(): void { }
+async function asyncFunc(): Promise<void> { }
+async function asyncFuncWithoutType() { }
+function promiseFunc(): Promise<void> { }
diff --git a/test/declaration-index/__snapshots__/DeclarationIndex.spec.ts.snap b/test/declaration-index/__snapshots__/DeclarationIndex.spec.ts.snap
index 0d55557..71c8929 100644
--- a/test/declaration-index/__snapshots__/DeclarationIndex.spec.ts.snap
+++ b/test/declaration-index/__snapshots__/DeclarationIndex.spec.ts.snap
@@ -78,6 +78,7 @@ Array [
   DeclarationInfo {
     "declaration": FunctionDeclaration {
       "end": 92,
+      "isAsync": false,
       "isExported": true,
       "name": "isString",
       "parameters": Array [
@@ -102,6 +103,7 @@ Array [
   DeclarationInfo {
     "declaration": FunctionDeclaration {
       "end": 53,
+      "isAsync": false,
       "isExported": true,
       "name": "toString",
       "parameters": Array [],
@@ -119,6 +121,7 @@ Array [
   DeclarationInfo {
     "declaration": FunctionDeclaration {
       "end": 53,
+      "isAsync": false,
       "isExported": true,
       "name": "toString",
       "parameters": Array [],
@@ -964,6 +967,7 @@ Object {
           MethodDeclaration {
             "end": 329,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomethingAwesome",
@@ -991,6 +995,7 @@ Object {
           MethodDeclaration {
             "end": 105,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomething",
@@ -1023,6 +1028,7 @@ Object {
           MethodDeclaration {
             "end": 329,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomethingAwesome",
@@ -1064,6 +1070,7 @@ Object {
           MethodDeclaration {
             "end": 105,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomething",
@@ -1222,6 +1229,7 @@ Object {
           MethodDeclaration {
             "end": 137,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomethingAwesome",
@@ -1249,6 +1257,7 @@ Object {
           MethodDeclaration {
             "end": 57,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomething",
@@ -1407,6 +1416,7 @@ Object {
           MethodDeclaration {
             "end": 137,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomethingAwesome",
@@ -1434,6 +1444,7 @@ Object {
           MethodDeclaration {
             "end": 57,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomething",
@@ -1455,6 +1466,7 @@ Object {
     DeclarationInfo {
       "declaration": FunctionDeclaration {
         "end": 186,
+        "isAsync": false,
         "isExported": true,
         "name": "isNumber",
         "parameters": Array [
@@ -1476,6 +1488,7 @@ Object {
     DeclarationInfo {
       "declaration": FunctionDeclaration {
         "end": 92,
+        "isAsync": false,
         "isExported": true,
         "name": "isString",
         "parameters": Array [
@@ -1508,6 +1521,7 @@ Object {
           MethodDeclaration {
             "end": 329,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomethingAwesome",
@@ -1535,6 +1549,7 @@ Object {
           MethodDeclaration {
             "end": 105,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomething",
@@ -1567,6 +1582,7 @@ Object {
           MethodDeclaration {
             "end": 329,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomethingAwesome",
@@ -1594,6 +1610,7 @@ Object {
           MethodDeclaration {
             "end": 105,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomething",
@@ -1752,6 +1769,7 @@ Object {
           MethodDeclaration {
             "end": 137,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomethingAwesome",
@@ -1779,6 +1797,7 @@ Object {
           MethodDeclaration {
             "end": 57,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomething",
@@ -1813,6 +1832,7 @@ Object {
           MethodDeclaration {
             "end": 329,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomethingAwesome",
@@ -1854,6 +1874,7 @@ Object {
           MethodDeclaration {
             "end": 105,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomething",
@@ -1886,6 +1907,7 @@ Object {
           MethodDeclaration {
             "end": 329,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomethingAwesome",
@@ -1913,6 +1935,7 @@ Object {
           MethodDeclaration {
             "end": 105,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomething",
@@ -1945,6 +1968,7 @@ Object {
           MethodDeclaration {
             "end": 329,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomethingAwesome",
@@ -1986,6 +2010,7 @@ Object {
           MethodDeclaration {
             "end": 105,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomething",
@@ -2032,6 +2057,7 @@ Object {
           MethodDeclaration {
             "end": 329,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomethingAwesome",
@@ -2073,6 +2099,7 @@ Object {
           MethodDeclaration {
             "end": 105,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomething",
@@ -2231,6 +2258,7 @@ Object {
           MethodDeclaration {
             "end": 137,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomethingAwesome",
@@ -2258,6 +2286,7 @@ Object {
           MethodDeclaration {
             "end": 57,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomething",
@@ -2290,6 +2319,7 @@ Object {
           MethodDeclaration {
             "end": 329,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomethingAwesome",
@@ -2317,6 +2347,7 @@ Object {
           MethodDeclaration {
             "end": 105,
             "isAbstract": false,
+            "isAsync": false,
             "isOptional": false,
             "isStatic": false,
             "name": "doSomething",
diff --git a/test/declaration-index/specific-cases/body-parser/DeclarationIndex.body-parser.spec.ts b/test/declaration-index/specific-cases/body-parser/DeclarationIndex.body-parser.spec.ts
deleted file mode 100644
index cb1ae08..0000000
--- a/test/declaration-index/specific-cases/body-parser/DeclarationIndex.body-parser.spec.ts
+++ /dev/null
@@ -1,26 +0,0 @@
-import { join, resolve } from '../../../testUtilities';
-
-import { DeclarationIndex } from '../../../../src/DeclarationIndex';
-import { TypescriptParser } from '../../../../src/TypescriptParser';
-
-describe.skip('DeclarationIndex - specific case "body-parser"', () => {
-
-    const rootPath = resolve(
-        __dirname, '..', '..', '..', '_workspace', 'declaration-index', 'specific-cases', 'body-parser',
-    );
-    const files = [
-        join(rootPath, 'node_modules', '@types', 'body-parser', 'index.d.ts'),
-    ];
-    
-    let declarationIndex: DeclarationIndex;
-
-    beforeEach(() => {
-        declarationIndex = new DeclarationIndex(new TypescriptParser(), rootPath);
-    });
-
-    it('should parse the declarations', async () => {
-        await declarationIndex.buildIndex(files);
-        console.log(declarationIndex.index['bodyParser']);
-    });
-
-});
diff --git a/test/declaration-index/specific-cases/reindex-with-global-module/__snapshots__/DeclarationIndex.reindex-with-global-module-export.spec.ts.snap b/test/declaration-index/specific-cases/reindex-with-global-module/__snapshots__/DeclarationIndex.reindex-with-global-module-export.spec.ts.snap
index a286539..374d1a3 100644
--- a/test/declaration-index/specific-cases/reindex-with-global-module/__snapshots__/DeclarationIndex.reindex-with-global-module-export.spec.ts.snap
+++ b/test/declaration-index/specific-cases/reindex-with-global-module/__snapshots__/DeclarationIndex.reindex-with-global-module-export.spec.ts.snap
@@ -41,6 +41,7 @@ Array [
         MethodDeclaration {
           "end": 59,
           "isAbstract": false,
+          "isAsync": false,
           "isOptional": false,
           "isStatic": false,
           "name": "doSomething",
diff --git a/test/parsing/Flags.spec.ts b/test/parsing/Flags.spec.ts
new file mode 100644
index 0000000..3604cca
--- /dev/null
+++ b/test/parsing/Flags.spec.ts
@@ -0,0 +1,32 @@
+import { FunctionDeclaration, TypescriptParser } from '../../src';
+import { Resource } from '../../src/resources';
+import { getWorkspaceFile, rootPath } from '../testUtilities';
+
+describe('TypescriptParser', () => {
+
+    let parser: TypescriptParser;
+
+    beforeEach(() => {
+        parser = new TypescriptParser();
+    });
+
+    describe('isAsync Flag', () => {
+
+        const file = getWorkspaceFile('typescript-parser/async.ts');
+        let parsed: Resource;
+
+        beforeEach(async () => {
+            parsed = await parser.parseFile(file, rootPath);
+        });
+
+        it('should parse the given async elements in a class', () => {
+            expect(parsed.declarations[0]).toMatchSnapshot();
+        });
+
+        it('should parse async functions correctly', () => {
+            expect(parsed.declarations.filter(d => d instanceof FunctionDeclaration)).toMatchSnapshot();
+        });
+
+    });
+
+});
diff --git a/test/parsing/__snapshots__/Flags.spec.ts.snap b/test/parsing/__snapshots__/Flags.spec.ts.snap
new file mode 100644
index 0000000..70797c2
--- /dev/null
+++ b/test/parsing/__snapshots__/Flags.spec.ts.snap
@@ -0,0 +1,111 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`TypescriptParser isAsync Flag should parse async functions correctly 1`] = `
+Array [
+  FunctionDeclaration {
+    "end": 205,
+    "isAsync": false,
+    "isExported": false,
+    "name": "func",
+    "parameters": Array [],
+    "start": 180,
+    "type": "void",
+    "variables": Array [],
+  },
+  FunctionDeclaration {
+    "end": 251,
+    "isAsync": true,
+    "isExported": false,
+    "name": "asyncFunc",
+    "parameters": Array [],
+    "start": 206,
+    "type": "Promise<void>",
+    "variables": Array [],
+  },
+  FunctionDeclaration {
+    "end": 293,
+    "isAsync": true,
+    "isExported": false,
+    "name": "asyncFuncWithoutType",
+    "parameters": Array [],
+    "start": 252,
+    "type": undefined,
+    "variables": Array [],
+  },
+  FunctionDeclaration {
+    "end": 335,
+    "isAsync": false,
+    "isExported": false,
+    "name": "promiseFunc",
+    "parameters": Array [],
+    "start": 294,
+    "type": "Promise<void>",
+    "variables": Array [],
+  },
+]
+`;
+
+exports[`TypescriptParser isAsync Flag should parse the given async elements in a class 1`] = `
+ClassDeclaration {
+  "accessors": Array [],
+  "end": 178,
+  "isExported": false,
+  "methods": Array [
+    MethodDeclaration {
+      "end": 56,
+      "isAbstract": false,
+      "isAsync": true,
+      "isOptional": false,
+      "isStatic": true,
+      "name": "staticAsync",
+      "parameters": Array [],
+      "start": 19,
+      "type": undefined,
+      "variables": Array [],
+      "visibility": 2,
+    },
+    MethodDeclaration {
+      "end": 84,
+      "isAbstract": false,
+      "isAsync": false,
+      "isOptional": false,
+      "isStatic": false,
+      "name": "func",
+      "parameters": Array [],
+      "start": 61,
+      "type": "void",
+      "variables": Array [],
+      "visibility": 2,
+    },
+    MethodDeclaration {
+      "end": 132,
+      "isAbstract": false,
+      "isAsync": true,
+      "isOptional": false,
+      "isStatic": false,
+      "name": "asyncFunc",
+      "parameters": Array [],
+      "start": 89,
+      "type": "Promise<void>",
+      "variables": Array [],
+      "visibility": 2,
+    },
+    MethodDeclaration {
+      "end": 176,
+      "isAbstract": false,
+      "isAsync": true,
+      "isOptional": false,
+      "isStatic": false,
+      "name": "asyncFuncWithoutType",
+      "parameters": Array [],
+      "start": 137,
+      "type": undefined,
+      "variables": Array [],
+      "visibility": 2,
+    },
+  ],
+  "name": "Class1",
+  "properties": Array [],
+  "start": 0,
+}
+`;