85 lines
2.5 KiB
JavaScript
85 lines
2.5 KiB
JavaScript
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// Flags: --enable-source-maps
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'use strict';
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require('../common');
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const assert = require('assert');
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const { findSourceMap, SourceMap } = require('module');
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const { readFileSync } = require('fs');
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// findSourceMap() can lookup source-maps based on URIs, in the
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// non-exceptional case.
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{
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require('../fixtures/source-map/disk-relative-path.js');
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const sourceMap = findSourceMap(
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require.resolve('../fixtures/source-map/disk-relative-path.js')
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);
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const {
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originalLine,
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originalColumn,
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originalSource
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} = sourceMap.findEntry(0, 29);
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assert.strictEqual(originalLine, 2);
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assert.strictEqual(originalColumn, 4);
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assert(originalSource.endsWith('disk.js'));
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}
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// findSourceMap() can be used in Error.prepareStackTrace() to lookup
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// source-map attached to error.
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{
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let callSite;
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let sourceMap;
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Error.prepareStackTrace = (error, trace) => {
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const throwingRequireCallSite = trace[0];
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if (throwingRequireCallSite.getFileName().endsWith('typescript-throw.js')) {
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sourceMap = findSourceMap(throwingRequireCallSite.getFileName(), error);
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callSite = throwingRequireCallSite;
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}
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};
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try {
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// Require a file that throws an exception, and has a source map.
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require('../fixtures/source-map/typescript-throw.js');
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} catch (err) {
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err.stack; // Force prepareStackTrace() to be called.
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}
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assert(callSite);
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assert(sourceMap);
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const {
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generatedLine,
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generatedColumn,
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originalLine,
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originalColumn,
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originalSource
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} = sourceMap.findEntry(
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callSite.getLineNumber() - 1,
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callSite.getColumnNumber() - 1
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);
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assert.strictEqual(generatedLine, 19);
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assert.strictEqual(generatedColumn, 14);
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assert.strictEqual(originalLine, 17);
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assert.strictEqual(originalColumn, 10);
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assert(originalSource.endsWith('typescript-throw.ts'));
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}
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// SourceMap can be instantiated with Source Map V3 object as payload.
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{
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const payload = JSON.parse(readFileSync(
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require.resolve('../fixtures/source-map/disk.map'), 'utf8'
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));
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const sourceMap = new SourceMap(payload);
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const {
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originalLine,
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originalColumn,
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originalSource
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} = sourceMap.findEntry(0, 29);
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assert.strictEqual(originalLine, 2);
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assert.strictEqual(originalColumn, 4);
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assert(originalSource.endsWith('disk.js'));
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// The stored payload should be a clone:
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assert.strictEqual(payload.mappings, sourceMap.payload.mappings);
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assert.notStrictEqual(payload, sourceMap.payload);
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assert.strictEqual(payload.sources[0], sourceMap.payload.sources[0]);
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assert.notStrictEqual(payload.sources, sourceMap.payload.sources);
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}
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