import {assert, assertEquals} from './deps.ts';
import {readText, writeText} from './mod.ts';

type Test = [string, () => void | Promise<void>];

const tests: Test[] = [
  [
    'reads/writes without throwing', async () => {
      const input = 'hello world';
      await writeText(input);
      await readText();
    },
  ],
  [
    'single line data', async () => {
      const input = 'single line data';
      await writeText(input);
      const output = await readText();
      assertEquals(output.replace(/\n+$/u, ''), input.replace(/\n+$/u, ''));
    },
  ],
  [
    'multi line data', async () => {
      const input = 'multi\nline\ndata';
      await writeText(input);
      const output = await readText();
      assertEquals(output.replace(/\n+$/u, ''), input.replace(/\n+$/u, ''));
    },
  ],
  [
    'multi line data dangling newlines', async () => {
      const input = '\n\n\nmulti\n\n\n\n\n\nline\ndata\n\n\n\n\n';
      await writeText(input);
      const output = await readText({trimFinalNewlines: false});
      assertEquals(output.replace(/\n+$/u, ''), input.replace(/\n+$/u, ''));
    },
  ],
  [
    'data with special characters', async () => {
      const input = '`~!@#$%^&*()_+-=[]{};\':",./<>?\t\n';
      await writeText(input);
      const output = await readText({trimFinalNewlines: false});
      assertEquals(output.replace(/\n+$/u, ''), input.replace(/\n+$/u, ''));
    },
  ],
  [
    'data with unicode characters', async () => {
      const input = 'Rafał';
      await writeText(input);
      const output = await readText();
      assertEquals(output.replace(/\n+$/u, ''), input.replace(/\n+$/u, ''));
    },
  ],
  [
    'option: trim', async () => {
      const input = 'hello world\n\n';
      const inputTrimmed = 'hello world';
      await writeText(input);
      const output = await readText({trimFinalNewlines: false});
      const outputTrimmed = await readText({trimFinalNewlines: true});
      const outputDefault = await readText();
      assert(output !== inputTrimmed && output.trim() === inputTrimmed);
      assertEquals(inputTrimmed, outputTrimmed);
      assertEquals(inputTrimmed, outputDefault);
    },
  ],
  [
    'option: unixNewlines', async () => {
      const inputCRLF = 'hello\r\nworld';
      const inputLF = 'hello\nworld';
      await writeText(inputCRLF);
      const output = await readText({unixNewlines: false});
      const outputUnix = await readText({unixNewlines: true});
      const outputDefault = await readText();
      assertEquals(inputCRLF, output);
      assertEquals(inputLF, outputUnix);
      assertEquals(inputLF, outputDefault);
    },
  ],
];

for (const [name, fn] of tests) Deno.test({fn, name});