assert_mapped() — svelte Function Reference

Architecture documentation for the assert_mapped() function in helpers.js from the svelte codebase.

Function javascript BuildSystem MessageProcessor

Entity Profile

BuildSystem→ MessageProcessor→ assert_mapped() — svelte Function Reference

Dependency Diagram

graph TD
  e6731042_f1de_7d90_d0e1_d9c9d937dd73["assert_mapped()"]
  740dc682_957b_322a_475e_aac0e8ee02bc["helpers.js"]
  e6731042_f1de_7d90_d0e1_d9c9d937dd73 -->|defined in| 740dc682_957b_322a_475e_aac0e8ee02bc
  style e6731042_f1de_7d90_d0e1_d9c9d937dd73 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/svelte/tests/sourcemaps/helpers.js lines 14–39

export function assert_mapped({ code, filename, input, input_code, preprocessed }) {
	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 = /** @type {Location} */ (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}"`
	);
}