1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147 |
x1343
x1343
x1343
x2140
x2140
x2140
x2375
x2140
x2312
x2140
x2151
x2140
x2519
x2140
x2140
x1343
x2127
x2127
x2354
x2127
x2294
x2127
x2517
x2127
x2127
x1343
x1343
x1343
x1343
x1343
x1480
x1487
x1487
x1480
x1480
x1480
x1480
x1480
x1480
x1480
x1480
x1480
x1480
x1480
x2257
x2257
x2257
x2257
x2257
x2257
x2257
x2257
x2257
x1480
x4444
x1480
x1480 |
|
// Copyright 2018-2026 the Deno authors. MIT license.
// This module is browser compatible.
import { bgGreen, bgRed, bold, gray, green, red, white } from "./styles.ts";
import type { DiffResult, DiffType } from "./types.ts";
/**
* Colors the output of assertion diffs.
*
* @param diffType Difference type, either added or removed.
* @param background If true, colors the background instead of the text.
*
* @returns A function that colors the input string.
*
* @example Usage
* ```ts
* import { createColor } from "@std/internal";
* import { assertEquals } from "@std/assert";
* import { bold, green, red, white } from "@std/fmt/colors";
*
* assertEquals(createColor("added")("foo"), green(bold("foo")));
* assertEquals(createColor("removed")("foo"), red(bold("foo")));
* assertEquals(createColor("common")("foo"), white("foo"));
* ```
*/
export function createColor(
diffType: DiffType,
/**
* TODO(@littledivy): Remove this when we can detect true color terminals. See
* https://github.com/denoland/std/issues/2575.
*/
background = false,
): (s: string) => string {
switch (diffType) {
case "added":
return (s) => background ? bgGreen(white(s)) : green(bold(s));
case "removed":
return (s) => background ? bgRed(white(s)) : red(bold(s));
case "truncation":
return gray;
default:
return white;
}
}
/**
* Prefixes `+` or `-` in diff output.
*
* @param diffType Difference type, either added or removed
*
* @returns A string representing the sign.
*
* @example Usage
* ```ts
* import { createSign } from "@std/internal";
* import { assertEquals } from "@std/assert";
*
* assertEquals(createSign("added"), "+ ");
* assertEquals(createSign("removed"), "- ");
* assertEquals(createSign("common"), " ");
* ```
*/
export function createSign(diffType: DiffType): string {
switch (diffType) {
case "added":
return "+ ";
case "removed":
return "- ";
default:
return " ";
}
}
/** Options for {@linkcode buildMessage}. */
export interface BuildMessageOptions {
/**
* Whether to output the diff as a single string.
* @default {false}
*/
stringDiff?: boolean;
}
/**
* Builds a message based on the provided diff result.
*
* @param diffResult The diff result array.
* @param options Optional parameters for customizing the message.
* @param truncateDiff Function to truncate the diff (default is no truncation).
*
* @returns An array of strings representing the built message.
*
* @example Usage
* ```ts no-assert
* import { diffStr, buildMessage } from "@std/internal";
*
* diffStr("Hello, world!", "Hello, world");
* // [
* // "",
* // "",
* // " [Diff] Actual / Expected",
* // "",
* // "",
* // "- Hello, world!",
* // "+ Hello, world",
* // "",
* // ]
* ```
*/
export function buildMessage(
diffResult: ReadonlyArray<DiffResult<string>>,
options: BuildMessageOptions = {},
truncateDiff?: (
diffResult: ReadonlyArray<DiffResult<string>>,
stringDiff: boolean,
contextLength?: number | null,
) => ReadonlyArray<DiffResult<string>>,
): string[] {
if (truncateDiff != null) {
diffResult = truncateDiff(diffResult, options.stringDiff ?? false);
}
const { stringDiff = false } = options;
const messages = [
"",
"",
` ${gray(bold("[Diff]"))} ${red(bold("Actual"))} / ${
green(bold("Expected"))
}`,
"",
"",
];
const diffMessages = diffResult.map((result) => {
const color = createColor(result.type);
const line = result.type === "added" || result.type === "removed"
? result.details?.map((detail) =>
detail.type !== "common"
? createColor(detail.type, true)(detail.value)
: detail.value
).join("") ?? result.value
: result.value;
return color(`${createSign(result.type)}${line}`);
});
messages.push(...(stringDiff ? [diffMessages.join("")] : diffMessages), "");
return messages;
}
|