Write tests to demonstrate how baseUrl + pathMapping to node_modules behaves
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//// [tests/cases/compiler/pathMappingBasedModuleResolution_withExtension_MapedToNodeModules.ts] ////
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//// [foobar.js]
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module.exports = { a: 10 };
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//// [a.ts]
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import foobar from "foo/bar/foobar.js";
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//// [/bin/node_modules/foo/bar/foobar.js]
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module.exports = { a: 10 };
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//// [/bin/a.js]
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"use strict";
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exports.__esModule = true;
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=== /a.ts ===
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import foobar from "foo/bar/foobar.js";
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>foobar : Symbol(foobar, Decl(a.ts, 0, 6))
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=== /node_modules/foo/bar/foobar.js ===
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module.exports = { a: 10 };
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>module.exports : Symbol("/node_modules/foo/bar/foobar", Decl(foobar.js, 0, 0))
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>module : Symbol(export=, Decl(foobar.js, 0, 0))
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>exports : Symbol(export=, Decl(foobar.js, 0, 0))
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>a : Symbol(a, Decl(foobar.js, 0, 18))
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[
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"======== Resolving module 'foo/bar/foobar.js' from '/a.ts'. ========",
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"Module resolution kind is not specified, using 'NodeJs'.",
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"'baseUrl' option is set to '/', using this value to resolve non-relative module name 'foo/bar/foobar.js'.",
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"'paths' option is specified, looking for a pattern to match module name 'foo/bar/foobar.js'.",
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"Module name 'foo/bar/foobar.js', matched pattern '*'.",
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"Trying substitution 'node_modules/*', candidate module location: 'node_modules/foo/bar/foobar.js'.",
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"File '/node_modules/foo/bar/foobar.js' exist - use it as a name resolution result.",
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"======== Module name 'foo/bar/foobar.js' was successfully resolved to '/node_modules/foo/bar/foobar.js'. ========"
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]
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=== /a.ts ===
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import foobar from "foo/bar/foobar.js";
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>foobar : { a: number; }
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=== /node_modules/foo/bar/foobar.js ===
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module.exports = { a: 10 };
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>module.exports = { a: 10 } : { a: number; }
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>module.exports : { a: number; }
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>module : { "/node_modules/foo/bar/foobar": { a: number; }; }
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>exports : { a: number; }
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>{ a: 10 } : { a: number; }
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>a : number
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>10 : 10
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// @noImplicitReferences: true
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// @traceResolution: true
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// @allowJs: true
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// @esModuleInterop: true
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// @fullEmitPaths: true
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// @Filename: /node_modules/foo/bar/foobar.js
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module.exports = { a: 10 };
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// @Filename: /a.ts
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import foobar from "foo/bar/foobar.js";
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// @Filename: /tsconfig.json
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{
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"compilerOptions": {
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"baseUrl": ".",
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"paths": {
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"*": ["node_modules/*", "src/types"]
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},
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"allowJs": true,
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"outDir": "bin"
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}
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}
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