perf(typescript): upgrade to latest version of typescript

Author: uittorio

package-lock.json

@@ -92,7 +92,7 @@
         "ts-node": "^10.1.0",
         "tsconfig-paths": "^3.10.1",
         "ttypescript": "1.5.12",
-        "typescript": "^4.2.3",
+        "typescript": "^4.3.5",
         "webpack": "^5.49.0",
         "webpack-cli": "^4.7.2",
         "webpack-merge": "^5.8.0",

package.json

@@ -38,9 +38,15 @@ export namespace TypescriptHelper {
   }
 
   export function GetDeclarationFromSymbol(symbol: ts.Symbol): ts.Declaration {
-    const declaration: ts.Declaration = GetFirstValidDeclaration(
-      symbol.declarations
-    );
+    const declarations: ts.Declaration[] | undefined = symbol.declarations;
+
+    if (!declarations) {
+      throw new Error(
+        `Failed to look up declarations for \`${symbol.getName()}'.`
+      );
+    }
+
+    const declaration: ts.Declaration = GetFirstValidDeclaration(declarations);
 
     if (isImportExportDeclaration(declaration)) {
       return GetDeclarationForImport(declaration);
@@ -52,7 +58,15 @@ export namespace TypescriptHelper {
   export function GetConcreteDeclarationFromSymbol(
     symbol: ts.Symbol
   ): ts.Declaration {
-    const declaration: ts.Declaration = symbol.declarations[0];
+    const declarations: ts.Declaration[] | undefined = symbol.declarations;
+
+    if (!declarations) {
+      throw new Error(
+        `Failed to look up declarations for \`${symbol.getName()}'.`
+      );
+    }
+
+    const declaration: ts.Declaration = declarations[0];
 
     if (isImportExportDeclaration(declaration)) {
       return GetConcreteDeclarationForImport(declaration);

src/transformer/descriptor/helper/helper.ts

@@ -20,7 +20,7 @@ export function GetMockPropertiesFromSymbol(
     .filter((prop: ts.Symbol) => !!prop.declarations) // Dynamically generated properties (mapped types) do not have declarations
     .map(
       (prop: ts.Symbol) =>
-        prop.declarations.filter(
+        prop.declarations?.filter(
           (declaration: ts.Declaration) => !core.ts.isSetAccessor(declaration)
         )[0]
     )

src/transformer/descriptor/mock/mockProperties.ts

@@ -10,6 +10,7 @@ import {
   createTypeLiteralNode,
   createTypeQueryNode,
 } from '../../../typescriptFactory/typescriptFactory';
+import GetDeclarationFromSymbol = TypescriptHelper.GetDeclarationFromSymbol;
 
 type ExternalSource = ts.SourceFile | ts.ModuleDeclaration;
 
@@ -35,7 +36,8 @@ export function GetModuleDescriptor(
   }
 
   const symbol: ts.Symbol = typeChecker.getAliasedSymbol(symbolAlias);
-  const externalModuleDeclaration: ts.NamedDeclaration = symbol.declarations[0];
+  const externalModuleDeclaration: ts.NamedDeclaration =
+    GetDeclarationFromSymbol(symbol);
 
   if (isExternalSource(externalModuleDeclaration)) {
     return GetPropertiesFromSourceFileOrModuleDeclarationDescriptor(
@@ -83,12 +85,12 @@ export function GetPropertiesFromSourceFileOrModuleDeclaration(
   const moduleExports: ts.Symbol[] = typeChecker.getExportsOfModule(symbol);
 
   return moduleExports
-    .map((prop: ts.Symbol): ModuleExportsDeclarations => {
+    .map((prop: ts.Symbol): Partial<ModuleExportsDeclarations> => {
       const originalSymbol: ts.Symbol =
         TypescriptHelper.GetAliasedSymbolSafe(prop);
-      const originalDeclaration: ts.NamedDeclaration =
+      const originalDeclaration: ts.NamedDeclaration | undefined =
         originalSymbol?.declarations?.[0];
-      const declaration: ts.Declaration = prop?.declarations?.[0];
+      const declaration: ts.Declaration | undefined = prop?.declarations?.[0];
 
       return {
         declaration,

src/transformer/descriptor/module/module.ts

@@ -24,6 +24,7 @@ import {
   createVariableDeclarationList,
   createVariableStatement,
 } from '../../../typescriptFactory/typescriptFactory';
+import GetDeclarationFromSymbol = TypescriptHelper.GetDeclarationFromSymbol;
 
 export function GetTypeParameterDescriptor(
   node: ts.TypeParameterDeclaration,
@@ -35,7 +36,7 @@ export function GetTypeParameterDescriptor(
     ? GetDescriptor(node.default, scope)
     : GetNullDescriptor();
 
-  const declaration: ts.Declaration = type.symbol.declarations[0];
+  const declaration: ts.Declaration = GetDeclarationFromSymbol(type.symbol);
   const typeDeclaration: ts.Declaration | undefined =
     TypescriptHelper.GetTypeParameterOwnerMock(declaration);
 

src/transformer/descriptor/typeParameter/typeParameter.ts

@@ -26,7 +26,7 @@ export function GetTypeQueryDescriptor(
 ): ts.Expression {
   const symbol: ts.Symbol | undefined = getTypeQuerySymbol(node);
 
-  if (!symbol?.declarations.length) {
+  if (!symbol?.declarations?.length) {
     return GetUndefinedDescriptor();
   }
 
@@ -131,7 +131,13 @@ function getTypeQuerySymbol(node: ts.TypeQueryNode): ts.Symbol | undefined {
 function getTypeQueryDeclarationFromSymbol(
   symbol: ts.Symbol
 ): ts.NamedDeclaration {
-  const declaration: ts.Declaration = symbol.declarations[0];
+  const declaration: ts.Declaration | undefined = symbol.declarations?.[0];
+
+  if (!declaration) {
+    throw new Error(
+      `Failed to look up declaration for \`${symbol.getName()}'.`
+    );
+  }
 
   if (core.ts.isImportEqualsDeclaration(declaration)) {
     return declaration;

src/transformer/descriptor/typeQuery/typeQuery.ts

@@ -14,7 +14,7 @@ import {
   createBinaryExpression,
   createBlock,
   createCall,
-  createEmptyStatement,
+  createOmittedExpression,
   createExpressionStatement,
   createForStatement,
   createIdentifier,
@@ -71,7 +71,7 @@ export function storeRegisterMock(
     Logger('RegisterMock').error(
       'registerMock can be used only to mock type references.'
     );
-    return createEmptyStatement();
+    return createOmittedExpression();
   }
 }
 

src/transformer/mock/mock.ts

@@ -10,7 +10,7 @@ import type {
   ColonToken,
   ConditionalExpression,
   ElementAccessExpression,
-  EmptyStatement,
+  OmittedExpression,
   Expression,
   ExpressionStatement,
   ForStatement,
@@ -463,8 +463,8 @@ export function createPostfix(
   return core.ts.factory.createPostfixUnaryExpression(operand, operator);
 }
 
-export function createEmptyStatement(): EmptyStatement {
-  return core.ts.factory.createEmptyStatement();
+export function createOmittedExpression(): OmittedExpression {
+  return core.ts.factory.createOmittedExpression();
 }
 
 export function createTypeReferenceNode(