chore: write basic tests for termlink

[savioxavier]

Description

Closes #1

This pull requests adds basic unit tests for this package

Tests currently included are:

TestBasicLink
TestColorLink
TestColorsPackageLink
TestBoldLink
TestItalicsLink
TestItalicsBoldLink
TestColorItalicsBoldLink

More tests will be added soon

There's a main handler function called testAll that tests both types of test in one go, without the need to check for SupportsHyperlink() everytime using logic statements. A basic structure of a test is as follows:

func TestBasicLink(t *testing.T) {
	input := termlink.Link("Hello", "https://google.com")
	expectedHyperlink := "\x1b]8;;https://google.com\aHello\x1b]8;;\a\x1b[m"
	expectedNoHyperlink := "Hello (\u200Bhttps://google.com)\u001b[m"

	testAll(input, expectedHyperlink, expectedNoHyperlink)(t)
}

Run the tests using go test -v. Please ensure the tests are run both in hyperlink and non-hyperlink supported terminals. I had used Zsh on WSL with Windows Terminal for the hyperlink tests and Zsh on WSL with VSCode for the non-hyperlink tests.

[savioxavier]

Just make sure you run the tests locally, not sure why it fails in the workflow.

The results from the workflow tests look similar to Git Bash's, maybe that's the case?