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dcd01dd025
Make warnings fail
Original: 4543b563a9
84 lines
2 KiB
TypeScript
84 lines
2 KiB
TypeScript
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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import { equal } from "./asserts.ts";
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import { red, green, white, gray, bold } from "../colors/mod.ts";
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import diff, { DiffType, DiffResult } from "./diff.ts";
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import { format } from "./format.ts";
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const CAN_NOT_DISPLAY = "[Cannot display]";
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function createStr(v: unknown): string {
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try {
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return format(v);
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} catch (e) {
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return red(CAN_NOT_DISPLAY);
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}
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}
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function createColor(diffType: DiffType): (s: string) => string {
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switch (diffType) {
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case DiffType.added:
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return (s: string): string => green(bold(s));
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case DiffType.removed:
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return (s: string): string => red(bold(s));
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default:
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return white;
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}
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}
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function createSign(diffType: DiffType): string {
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switch (diffType) {
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case DiffType.added:
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return "+ ";
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case DiffType.removed:
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return "- ";
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default:
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return " ";
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}
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}
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function buildMessage(diffResult: ReadonlyArray<DiffResult<string>>): string[] {
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const messages = [];
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messages.push("");
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messages.push("");
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messages.push(
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` ${gray(bold("[Diff]"))} ${red(bold("Left"))} / ${green(bold("Right"))}`
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);
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messages.push("");
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messages.push("");
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diffResult.forEach(
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(result: DiffResult<string>): void => {
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const c = createColor(result.type);
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messages.push(c(`${createSign(result.type)}${result.value}`));
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}
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);
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messages.push("");
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return messages;
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}
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export function assertEquals(
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actual: unknown,
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expected: unknown,
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msg?: string
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): void {
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if (equal(actual, expected)) {
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return;
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}
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let message = "";
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const actualString = createStr(actual);
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const expectedString = createStr(expected);
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try {
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const diffResult = diff(
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actualString.split("\n"),
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expectedString.split("\n")
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);
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message = buildMessage(diffResult).join("\n");
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} catch (e) {
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message = `\n${red(CAN_NOT_DISPLAY)} + \n\n`;
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}
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if (msg) {
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message = msg;
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}
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throw new Error(message);
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}
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