chore: fix file names in the API extraction script

Closes ng-bootstrap#419

Closes ng-bootstrap#423

Author: pkozlowski-opensource

misc/api-doc.js

@@ -24,18 +24,17 @@ class APIDocVisitor {
 
     return sourceFile.statements.reduce((directivesSoFar, statement) => {
       if (statement.kind === ts.SyntaxKind.ClassDeclaration) {
-        return directivesSoFar.concat(this.visitClassDeclaration(statement));
+        return directivesSoFar.concat(this.visitClassDeclaration(fileName, statement));
       }
 
       return directivesSoFar;
     }, []);
   }
 
-  visitClassDeclaration(classDeclaration) {
+  visitClassDeclaration(fileName, classDeclaration) {
     var symbol = this.program.getTypeChecker().getSymbolAtLocation(classDeclaration.name);
     var description = ts.displayPartsToString(symbol.getDocumentationComment());
     var className = classDeclaration.name.text;
-    var fileName = classDeclaration.parent.fileName;
     var directiveInfo;
     var members;
 

misc/api-doc.spec.js

@@ -6,7 +6,7 @@ describe('APIDocVisitor', function() {
      function() { expect(apiDoc(['./misc/api-doc-test-cases/no-docs.ts'])).toEqual({}); });
 
   it('should extract basic info from directives and components', function() {
-    var docs = apiDoc(['./misc/api-doc-test-cases/directives-no-in-out.ts']);
+    var docs = apiDoc(['misc/api-doc-test-cases/directives-no-in-out.ts']);
 
     expect(Object.keys(docs).length).toBe(2);