1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
// Flags: --enable-source-maps
'use strict';
const common = require('../common');
const assert = require('assert');
const { findSourceMap, SourceMap } = require('module');
const { readFileSync } = require('fs');
// It should throw with invalid args.
{
[1, true, 'foo'].forEach((invalidArg) =>
assert.throws(
() => new SourceMap(invalidArg),
{
code: 'ERR_INVALID_ARG_TYPE',
name: 'TypeError',
message: 'The "payload" argument must be of type object.' +
common.invalidArgTypeHelper(invalidArg)
}
)
);
}
// findSourceMap() can lookup source-maps based on URIs, in the
// non-exceptional case.
{
require('../fixtures/source-map/disk-relative-path.js');
const sourceMap = findSourceMap(
require.resolve('../fixtures/source-map/disk-relative-path.js')
);
const {
originalLine,
originalColumn,
originalSource
} = sourceMap.findEntry(0, 29);
assert.strictEqual(originalLine, 2);
assert.strictEqual(originalColumn, 4);
assert(originalSource.endsWith('disk.js'));
}
// findSourceMap() can be used in Error.prepareStackTrace() to lookup
// source-map attached to error.
{
let callSite;
let sourceMap;
Error.prepareStackTrace = (error, trace) => {
const throwingRequireCallSite = trace[0];
if (throwingRequireCallSite.getFileName().endsWith('typescript-throw.js')) {
sourceMap = findSourceMap(throwingRequireCallSite.getFileName());
callSite = throwingRequireCallSite;
}
};
try {
// Require a file that throws an exception, and has a source map.
require('../fixtures/source-map/typescript-throw.js');
} catch (err) {
// eslint-disable-next-line no-unused-expressions
err.stack; // Force prepareStackTrace() to be called.
}
assert(callSite);
assert(sourceMap);
const {
generatedLine,
generatedColumn,
originalLine,
originalColumn,
originalSource
} = sourceMap.findEntry(
callSite.getLineNumber() - 1,
callSite.getColumnNumber() - 1
);
assert.strictEqual(generatedLine, 19);
assert.strictEqual(generatedColumn, 14);
assert.strictEqual(originalLine, 17);
assert.strictEqual(originalColumn, 10);
assert(originalSource.endsWith('typescript-throw.ts'));
}
// SourceMap can be instantiated with Source Map V3 object as payload.
{
const payload = JSON.parse(readFileSync(
require.resolve('../fixtures/source-map/disk.map'), 'utf8'
));
const sourceMap = new SourceMap(payload);
const {
originalLine,
originalColumn,
originalSource
} = sourceMap.findEntry(0, 29);
assert.strictEqual(originalLine, 2);
assert.strictEqual(originalColumn, 4);
assert(originalSource.endsWith('disk.js'));
// The stored payload should be a clone:
assert.strictEqual(payload.mappings, sourceMap.payload.mappings);
assert.notStrictEqual(payload, sourceMap.payload);
assert.strictEqual(payload.sources[0], sourceMap.payload.sources[0]);
assert.notStrictEqual(payload.sources, sourceMap.payload.sources);
}
// Test various known decodings to ensure decodeVLQ works correctly.
{
function makeMinimalMap(column) {
return {
sources: ['test.js'],
// Mapping from the 0th line, 0th column of the output file to the 0th
// source file, 0th line, ${column}th column.
mappings: `AAA${column}`,
};
}
const knownDecodings = {
'A': 0,
'B': -2147483648,
'C': 1,
'D': -1,
'E': 2,
'F': -2,
// 2^31 - 1, maximum values
'+/////D': 2147483647,
'8/////D': 2147483646,
'6/////D': 2147483645,
'4/////D': 2147483644,
'2/////D': 2147483643,
'0/////D': 2147483642,
// -2^31 + 1, minimum values
'//////D': -2147483647,
'9/////D': -2147483646,
'7/////D': -2147483645,
'5/////D': -2147483644,
'3/////D': -2147483643,
'1/////D': -2147483642,
};
for (const column in knownDecodings) {
const sourceMap = new SourceMap(makeMinimalMap(column));
const { originalColumn } = sourceMap.findEntry(0, 0);
assert.strictEqual(originalColumn, knownDecodings[column]);
}
}
// Test that generated columns are sorted when a negative offset is
// observed, see: https://github.com/mozilla/source-map/pull/92
{
function makeMinimalMap(generatedColumns, originalColumns) {
return {
sources: ['test.js'],
// Mapping from the 0th line, ${g}th column of the output file to the 0th
// source file, 0th line, ${column}th column.
mappings: generatedColumns.map((g, i) => `${g}AA${originalColumns[i]}`)
.join(',')
};
}
// U = 10
// F = -2
// A = 0
// E = 2
const sourceMap = new SourceMap(makeMinimalMap(
['U', 'F', 'F'],
['A', 'E', 'E']
));
assert.strictEqual(sourceMap.findEntry(0, 6).originalColumn, 4);
assert.strictEqual(sourceMap.findEntry(0, 8).originalColumn, 2);
assert.strictEqual(sourceMap.findEntry(0, 10).originalColumn, 0);
}
|
