Namespace unwrap throws error if the namespace ends with comments

[ziacik]

When the namespace only contains comments, or ends with comments, an error is thrown when namespaces#unwrap is called.

The error thrown is

/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:2253
            throw new ManipulationError(sourceFile.getFilePath(), oldFileText, newFileText, message);
            ^

ManipulationError: Manipulation error: Cannot get the next when at the end of the iterator.

-- Details --
Path: /mnt/c/Workspaces/Experimental/ts-morph-error/test.ts
Text: "class Whatever {}"
Stack: Error: Cannot get the next when at the end of the iterator.
    at AdvancedIterator.next (/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:39:19)
    at UnwrapParentHandler.handleNode (/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:1761:97)
    at ParentFinderReplacementNodeHandler.handleNode (/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:1541:36)
    at NodeHandlerHelper.handleForValues (/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:1352:21)
    at ParentFinderReplacementNodeHandler.handleChildren (/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:1414:25)
    at ParentFinderReplacementNodeHandler.handleNode (/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:1404:18)
    at ParentFinderReplacementNodeHandler.handleNode (/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:1544:19)
    at doManipulation (/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:2237:21)
    at unwrapNode (/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:2644:5)
    at NamespaceDeclaration.unwrap (/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:9964:13)
    at throwError (/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:2253:19)
    at doManipulation (/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:2251:9)
    at unwrapNode (/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:2644:5)
    at NamespaceDeclaration.unwrap (/mnt/c/Workspaces/Experimental/ts-morph-error/node_modules/ts-morph/dist/ts-morph.js:9964:13)
    at /mnt/c/Workspaces/Experimental/ts-morph-error/index.js:10:45
    at Array.forEach (<anonymous>)
    at Object.<anonymous> (/mnt/c/Workspaces/Experimental/ts-morph-error/index.js:10:28)
    at Module._compile (internal/modules/cjs/loader.js:1144:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1164:10)
    at Module.load (internal/modules/cjs/loader.js:993:32) {
  filePath: '/mnt/c/Workspaces/Experimental/ts-morph-error/test.ts',
  oldText: 'namespace Some {\n' +
    '        class Whatever {}\n' +
    '        // Some comment.\n' +
    '        /* This one too. */\n' +
    '    }',
  newText: 'class Whatever {}'
}

Version: 7.0.2

To Reproduce

import { Project, ts } from "ts-morph";
const project = new Project();
const sourceFile = project.createSourceFile(
    "test.ts",
    `namespace Some {
        class Whatever {}
        // Some comment.
        /* This one too. */
    }`
);
sourceFile.getNamespaces().forEach(ns => ns.unwrap());

Expected behavior

No error thrown.

[dsherret]

@ziacik thanks for reporting! I'll do a release with the fix later today.