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svelte/test/sourcemaps/helpers.ts

128 lines
3.0 KiB

import * as assert from 'assert';
import { getLocator } from 'locate-character';
import MagicString, { Bundle } from 'magic-string';
type AssertMappedParameters = {
code: string;
filename?: string;
input: string | ReturnType<typeof getLocator>;
input_code?: string;
preprocessed: any;
};
export function assert_mapped(
{ code, filename, input, input_code, preprocessed }: AssertMappedParameters
) {
const locate_input = typeof input === 'function' ? input : getLocator(input);
if (filename === undefined) filename = 'input.svelte';
if (input_code === undefined) input_code = code;
const source_loc = locate_input(input_code);
assert.notEqual(
source_loc,
undefined,
`failed to locate "${input_code}" in "${filename}"`
);
const transformed_loc = preprocessed.locate_1(code);
assert.notEqual(
transformed_loc,
undefined,
`failed to locate "${code}" in transformed "${filename}"`
);
assert.deepEqual(
preprocessed.mapConsumer.originalPositionFor(transformed_loc),
{
source: filename,
name: null,
line: source_loc.line + 1,
column: source_loc.column
},
`incorrect mappings for "${input_code}" in "${filename}"`
);
}
type AssertNotMappedParameters = {
code: string;
filename?: string;
preprocessed: any;
};
export function assert_not_mapped(
{ code, filename, preprocessed }: AssertNotMappedParameters
) {
if (filename === undefined) filename = 'input.svelte';
const transformed_loc = preprocessed.locate_1(code);
assert.notEqual(
transformed_loc,
undefined,
`failed to locate "${code}" in transformed "${filename}"`
);
assert.deepEqual(
preprocessed.mapConsumer.originalPositionFor(transformed_loc),
{
source: null,
name: null,
line: null,
column: null
},
`incorrect mappings for "${code}" in "${filename}"`
);
}
export function assert_not_located(
code: string,
locate: ReturnType<typeof getLocator>,
filename = 'input.svelte'
) {
assert.equal(
locate(code),
undefined,
`located "${code}" that should be removed from ${filename}`
);
}
export function magic_string_bundle(
inputs: Array<{ code: string | MagicString, filename: string }>,
filename = 'bundle.js',
separator = '\n'
) {
const bundle = new Bundle({ separator });
inputs.forEach(({ code, filename }) => {
bundle.addSource({
filename,
content: typeof code === 'string' ? new MagicString(code) : code
});
});
return {
code: bundle.toString(),
map: bundle.generateMap({
source: filename,
hires: true,
includeContent: false
})
};
}
export function magic_string_preprocessor_result(filename: string, src: MagicString) {
return {
code: src.toString(),
map: src.generateMap({
source: filename,
hires: true,
includeContent: false
})
};
}
export function magic_string_replace_all(src: MagicString, search: string, replace: string) {
let idx = src.original.indexOf(search);
if (idx == -1) throw new Error('search not found in src');
do {
src.overwrite(idx, idx + search.length, replace, { storeName: true });
} while ((idx = src.original.indexOf(search, idx + 1)) != -1);
}