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prettier/tests/cursor/jsfmt.spec.js

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Add `cursorOffset` option for cursor translation (#1637) * Add `formatWithCursor` API with `cursorOffset` option This addresses https://github.com/prettier/prettier/issues/93 by adding a new option, `cursorOffset`, that tells prettier to determine the location of the cursor after the code has been formatted. This is accessible through the API via a new function, `formatWithCursor`, which returns a `{formatted: string, cursorOffset: ?number}`. Here's a usage example: ```js require("prettier").formatWithCursor(" 1", { cursorOffset: 2 }); // -> { formatted: '1;\n', cursorOffset: 1 } ``` * Add `--cursor-offset` CLI option It will print out the offset instead of the formatted output. This makes it easier to test. For example: echo ' 1' | prettier --stdin --cursor-offset 2 # prints 1 * Add basic test of cursor translation * Document `cursorOffset` option and `formatWithCursor()` * Print translated cursor offset to stderr when --cursor-offset is given This lets us continue to print the formatted code, while also communicating the updated cursor position. See https://github.com/prettier/prettier/pull/1637#discussion_r119735496 * doc-print cursor placeholder in comments.printComments() See https://github.com/prettier/prettier/pull/1637#discussion_r119735149 * Compare array index to -1 instead of >= 0 to determine element presence See https://github.com/prettier/prettier/pull/1637#discussion_r119736623 * Return {formatted, cursor} from printDocToString() instead of mutating options See https://github.com/prettier/prettier/pull/1637#discussion_r119737354
2017-06-02 01:52:29 +03:00
const prettier = require("../..");
test("translates cursor correctly in basic case", () => {
expect(prettier.formatWithCursor(" 1", { cursorOffset: 2 })).toEqual({
formatted: "1;\n",
cursorOffset: 1
});
});