allow trailing dot when applying namespace. (#2100)

* allow trailing dot when applying namespace.

* add comment

* fix that

Author: sobolk

scripts/components/api-changes-validator/test-resources/test-projects/without-breaks/project-with-namespace/API.md

@@ -16,6 +16,14 @@ type SomeOtherTypeUnderSubNamespace = {
   someProperty: SomeTypeUnderSubNamespace;
 };
 
+class SomeClassUnderNamespace {
+  static readonly someStaticProperty: string;
+}
+
+type SomeTypeUnderNamespaceWithGenerics<TPropertyType> = {
+  someGenericProperty: TPropertyType;
+};
+
 declare namespace someSubNamespace {
   export {
     SomeTypeUnderSubNamespace,
@@ -28,7 +36,9 @@ export const functionUsingTypes2: (props: SomeTypeUnderNamespace, extraArg: stri
 
 declare namespace someNamespace {
   export {
+    SomeClassUnderNamespace,
     SomeTypeUnderNamespace,
+    SomeTypeUnderNamespaceWithGenerics,
     someSubNamespace,
     functionUsingTypes1,
     functionUsingTypes2

scripts/components/api-changes-validator/test-resources/test-projects/without-breaks/project-with-namespace/src/some_namespace.ts

@@ -14,3 +14,11 @@ export const functionUsingTypes2 = (
 ): Array<someSubNamespace.SomeTypeUnderSubNamespace> => {
   throw new Error();
 };
+
+export class SomeClassUnderNamespace {
+  static readonly someStaticProperty: string;
+}
+
+export type SomeTypeUnderNamespaceWithGenerics<TPropertyType> = {
+  someGenericProperty: TPropertyType;
+};

scripts/components/api-changes-validator/usage_statemets_renderer.ts

@@ -69,9 +69,10 @@ export class UsageStatementsRenderer {
 
       // characters that can be found before or after symbol
       // this is to prevent partial matches in case one symbol's characters are subset of longer one
-      const symbolTerminators = '[\\s\\,\\(\\)<>;]';
+      const possibleSymbolPrefix = '[\\s\\,\\(<;]';
+      const possibleSymbolSuffix = '[\\s\\,\\(\\)<>;\\.]';
       const regex = new RegExp(
-        `(${symbolTerminators})(${symbolName})(${symbolTerminators})`,
+        `(${possibleSymbolPrefix})(${symbolName})(${possibleSymbolSuffix})`,
         'g'
       );
       usageStatements = usageStatements.replaceAll(