import { describe, test, expect } from "bun:test";
import { htmlToPlainText, truncate, emailPreview } from "./utils";
describe("htmlToPlainText", () => {
test("strips simple HTML tags", () => {
expect(htmlToPlainText("Hello world
")).toBe("Hello world");
});
test("converts
to newlines", () => {
expect(htmlToPlainText("line1
line2
line3")).toBe(
"line1\nline2\nline3",
);
});
test("converts block elements to newlines", () => {
expect(htmlToPlainText("para1
para2
")).toBe("para1\npara2");
});
test("decodes HTML entities", () => {
expect(htmlToPlainText("& < > " ' ")).toBe(
'& < > " \'',
);
});
test("decodes numeric entities", () => {
expect(htmlToPlainText("ABC")).toBe("ABC");
});
test("collapses excessive newlines", () => {
const input = "a
b
";
const result = htmlToPlainText(input);
expect(result.split("\n").length).toBeLessThanOrEqual(4);
});
test("handles empty string", () => {
expect(htmlToPlainText("")).toBe("");
});
test("handles plain text passthrough", () => {
expect(htmlToPlainText("just plain text")).toBe("just plain text");
});
test("handles
tags", () => {
expect(htmlToPlainText("above
below")).toBe("above\n---\nbelow");
});
test("handles complex email HTML", () => {
const html = `
Hi Gautam,
Your appointment is confirmed for May 1st at 2pm.
Best regards,
Dr. Smith
`;
const text = htmlToPlainText(html);
expect(text).toContain("Hi Gautam,");
expect(text).toContain("appointment is confirmed");
expect(text).toContain("May 1st at 2pm");
expect(text).toContain("Dr. Smith");
expect(text).not.toContain("<");
});
});
describe("truncate", () => {
test("returns short strings unchanged", () => {
expect(truncate("hello", 10)).toBe("hello");
});
test("truncates long strings with ellipsis", () => {
expect(truncate("hello world", 8)).toBe("hello...");
});
test("handles exact length", () => {
expect(truncate("hello", 5)).toBe("hello");
});
test("handles very short maxLen", () => {
expect(truncate("hello", 3)).toBe("...");
});
});
describe("emailPreview", () => {
test("collapses newlines to single line", () => {
expect(emailPreview("line1\nline2\nline3")).toBe("line1 line2 line3");
});
test("truncates to default 120 chars", () => {
const long = "a".repeat(200);
const preview = emailPreview(long);
expect(preview.length).toBe(120);
expect(preview.endsWith("...")).toBe(true);
});
test("respects custom maxLen", () => {
const preview = emailPreview("hello world foo bar", 10);
expect(preview.length).toBe(10);
});
});