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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { diff, diffstr, DiffType } from "./diff.ts";import { assertEquals } from "../assert/assert_equals.ts";
Deno.test({  name: "diff() with empty values",  fn() {    assertEquals(diff([], []), []);  },});
Deno.test({  name: 'diff() "a" vs "b"',  fn() {    assertEquals(diff(["a"], ["b"]), [      { type: DiffType.removed, value: "a" },      { type: DiffType.added, value: "b" },    ]);  },});
Deno.test({  name: 'diff() "a" vs "a"',  fn() {    assertEquals(diff(["a"], ["a"]), [{ type: DiffType.common, value: "a" }]);  },});
Deno.test({  name: 'diff() "a" vs ""',  fn() {    assertEquals(diff(["a"], []), [{ type: DiffType.removed, value: "a" }]);  },});
Deno.test({  name: 'diff() "" vs "a"',  fn() {    assertEquals(diff([], ["a"]), [{ type: DiffType.added, value: "a" }]);  },});
Deno.test({  name: 'diff() "a" vs "a, b"',  fn() {    assertEquals(diff(["a"], ["a", "b"]), [      { type: DiffType.common, value: "a" },      { type: DiffType.added, value: "b" },    ]);  },});
Deno.test({  name: 'diff() "strength" vs "string"',  fn() {    assertEquals(diff(Array.from("strength"), Array.from("string")), [      { type: DiffType.common, value: "s" },      { type: DiffType.common, value: "t" },      { type: DiffType.common, value: "r" },      { type: DiffType.removed, value: "e" },      { type: DiffType.added, value: "i" },      { type: DiffType.common, value: "n" },      { type: DiffType.common, value: "g" },      { type: DiffType.removed, value: "t" },      { type: DiffType.removed, value: "h" },    ]);  },});
Deno.test({  name: 'diff() "strength" vs ""',  fn() {    assertEquals(diff(Array.from("strength"), Array.from("")), [      { type: DiffType.removed, value: "s" },      { type: DiffType.removed, value: "t" },      { type: DiffType.removed, value: "r" },      { type: DiffType.removed, value: "e" },      { type: DiffType.removed, value: "n" },      { type: DiffType.removed, value: "g" },      { type: DiffType.removed, value: "t" },      { type: DiffType.removed, value: "h" },    ]);  },});
Deno.test({  name: 'diff() "" vs "strength"',  fn() {    assertEquals(diff(Array.from(""), Array.from("strength")), [      { type: DiffType.added, value: "s" },      { type: DiffType.added, value: "t" },      { type: DiffType.added, value: "r" },      { type: DiffType.added, value: "e" },      { type: DiffType.added, value: "n" },      { type: DiffType.added, value: "g" },      { type: DiffType.added, value: "t" },      { type: DiffType.added, value: "h" },    ]);  },});
Deno.test({  name: 'diff() "abc", "c" vs "abc", "bcd", "c"',  fn() {    assertEquals(diff(["abc", "c"], ["abc", "bcd", "c"]), [      { type: DiffType.common, value: "abc" },      { type: DiffType.added, value: "bcd" },      { type: DiffType.common, value: "c" },    ]);  },});
Deno.test({  name: 'diff() "a b c d" vs "a b x d e" (diffstr)',  fn() {    const diffResult = diffstr(      [..."abcd"].join("\n"),      [..."abxde"].join("\n"),    );    assertEquals(diffResult, [      { type: DiffType.common, value: "a\\n\n" },      { type: DiffType.common, value: "b\\n\n" },      {        type: DiffType.added,        value: "x\\n\n",        details: [          { type: DiffType.added, value: "x" },          { type: DiffType.common, value: "\\" },          { type: DiffType.common, value: "n" },          { type: DiffType.common, value: "\n" },        ],      },      {        type: DiffType.added,        value: "d\\n\n",        details: [          { type: DiffType.common, value: "d" },          { type: DiffType.added, value: "\\" },          { type: DiffType.added, value: "n" },          { type: DiffType.common, value: "\n" },        ],      },      { type: DiffType.added, value: "e\n" },      {        type: DiffType.removed,        value: "c\\n\n",        details: [          { type: DiffType.removed, value: "c" },          { type: DiffType.common, value: "\\" },          { type: DiffType.common, value: "n" },          { type: DiffType.common, value: "\n" },        ],      },      {        type: DiffType.removed,        value: "d\n",        details: [          { type: DiffType.common, value: "d" },          { type: DiffType.common, value: "\n" },        ],      },    ]);  },});
Deno.test({  name: `diff() "3.14" vs "2.71" (diffstr)`,  fn() {    const diffResult = diffstr("3.14", "2.71");    assertEquals(diffResult, [      {        type: DiffType.removed,        value: "3.14\n",        details: [          {            type: DiffType.removed,            value: "3",          },          {            type: DiffType.common,            value: ".",          },          {            type: DiffType.removed,            value: "14",          },          {            type: DiffType.common,            value: "\n",          },        ],      },      {        type: DiffType.added,        value: "2.71\n",        details: [          {            type: DiffType.added,            value: "2",          },          {            type: DiffType.common,            value: ".",          },          {            type: DiffType.added,            value: "71",          },          {            type: DiffType.common,            value: "\n",          },        ],      },    ]);  },});
Deno.test({  name: `diff() single line "a b" vs "c d" (diffstr)`,  fn() {    const diffResult = diffstr("a b", "c d");    assertEquals(diffResult, [      {        type: DiffType.removed,        value: "a b\n",        details: [          { type: DiffType.removed, value: "a" },          { type: DiffType.removed, value: " " },          { type: DiffType.removed, value: "b" },          { type: DiffType.common, value: "\n" },        ],      },      {        type: DiffType.added,        value: "c d\n",        details: [          { type: DiffType.added, value: "c" },          { type: DiffType.added, value: " " },          { type: DiffType.added, value: "d" },          { type: DiffType.common, value: "\n" },        ],      },    ]);  },});
Deno.test({  name: `diff() single line, different word length "a bc" vs "cd e" (diffstr)`,  fn() {    const diffResult = diffstr("a bc", "cd e");    assertEquals(diffResult, [      {        type: DiffType.removed,        value: "a bc\n",        details: [          { type: DiffType.removed, value: "a" },          { type: DiffType.removed, value: " " },          { type: DiffType.removed, value: "bc" },          { type: DiffType.common, value: "\n" },        ],      },      {        type: DiffType.added,        value: "cd e\n",        details: [          { type: DiffType.added, value: "cd" },          { type: DiffType.added, value: " " },          { type: DiffType.added, value: "e" },          { type: DiffType.common, value: "\n" },        ],      },    ]);  },});
Deno.test({  name: `diff() "\\b\\f\\r\\t\\v\\n" vs "\\r\\n" (diffstr)`,  fn() {    const diffResult = diffstr("\b\f\r\t\v\n", "\r\n");    assertEquals(diffResult, [      {        type: DiffType.removed,        value: "\\b\\f\\r\\t\\v\\n\n",        details: [          { type: DiffType.common, value: "\\" },          { type: DiffType.removed, value: "b" },          { type: DiffType.removed, value: "\\" },          { type: DiffType.removed, value: "f" },          { type: DiffType.removed, value: "\\" },          { type: DiffType.common, value: "r" },          { type: DiffType.common, value: "\\" },          { type: DiffType.removed, value: "t" },          { type: DiffType.removed, value: "\\" },          { type: DiffType.removed, value: "v" },          { type: DiffType.removed, value: "\\" },          { type: DiffType.common, value: "n" },          { type: DiffType.common, value: "\n" },        ],      },      {        type: DiffType.added,        value: "\\r\\n\r\n",        details: [          { type: DiffType.common, value: "\\" },          { type: DiffType.common, value: "r" },          { type: DiffType.common, value: "\\" },          { type: DiffType.common, value: "n" },          { type: DiffType.added, value: "\r" },          { type: DiffType.common, value: "\n" },        ],      },      { type: DiffType.common, value: "\n" },    ]);  },});
Deno.test({  name: "diff() multiline with more removed lines",  fn() {    const diffResult = diffstr("a\na", "e");    assertEquals(diffResult, [      {        type: DiffType.removed,        value: "a\\n\n",      },      {        type: DiffType.removed,        value: "a\n",        details: [          { type: DiffType.removed, value: "a" },          { type: DiffType.common, value: "\n" },        ],      },      {        type: DiffType.added,        value: "e\n",        details: [          { type: DiffType.added, value: "e" },          { type: DiffType.common, value: "\n" },        ],      },    ]);  },});