v/vlib/builtin/string_strip_margin_test.v

// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.

fn test_strip_margins_no_tabs() {
	no_tabs := ['Hello there', 'This is a string', 'With multiple lines'].join('\n')
	no_tabs_stripped := 'Hello there
	                    |This is a string
						|With multiple lines'.strip_margin()
	assert no_tabs == no_tabs_stripped
}

fn test_strip_margins_text_before() {
	text_before := ['There is text', 'before the delimiter', 'that should be removed as well'].join('\n')
	text_before_stripped := 'There is text
	f lasj  asldfj j lksjdf |before the delimiter
	Which is removed hello  |that should be removed as well'.strip_margin()
	assert text_before_stripped == text_before
}

fn test_strip_margins_white_space_after_delim() {
	tabs := ['	Tab', '    spaces', '	another tab'].join('\n')
	tabs_stripped := '	Tab
	                 |    spaces
					 |	another tab'.strip_margin()
	assert tabs == tabs_stripped
}

fn test_strip_margins_alternate_delim() {
	alternate_delimiter := ['This has a different delim,', 'but that is ok',
		'because everything works',
	].join('\n')
	alternate_delimiter_stripped := 'This has a different delim,
	                                #but that is ok
                                    #because everything works'.strip_margin_custom(`#`)
	assert alternate_delimiter_stripped == alternate_delimiter
}

fn test_strip_margins_multiple_delims_after_first() {
	delim_after_first_instance := ['The delimiter used',
		'only matters the |||| First time it is seen', 'not any | other | times'].join('\n')
	delim_after_first_instance_stripped := 'The delimiter used
	                                       |only matters the |||| First time it is seen
	                                       |not any | other | times'.strip_margin()
	assert delim_after_first_instance_stripped == delim_after_first_instance
}

fn test_strip_margins_uneven_delims() {
	uneven_delims := ["It doesn't matter if the delims are uneven,",
		'The text will still be delimited correctly.', 'Maybe not everything needs 3 lines?',
		'Let us go for 4 then',
	].join('\n')
	uneven_delims_stripped := "It doesn't matter if the delims are uneven,
           |The text will still be delimited correctly.
                      |Maybe not everything needs 3 lines?
				|Let us go for 4 then".strip_margin()
	assert uneven_delims_stripped == uneven_delims
}

fn test_strip_margins_multiple_blank_lines() {
	multi_blank_lines := ['Multiple blank lines will be removed.',
		'	I actually consider this a feature.',
	].join('\n')
	multi_blank_lines_stripped := 'Multiple blank lines will be removed.



		|	I actually consider this a feature.'.strip_margin()
	assert multi_blank_lines == multi_blank_lines_stripped
}

fn test_strip_margins_end_newline() {
	end_with_newline := ['This line will end with a newline', 'Something cool or something.', ''].join('\n')
	end_with_newline_stripped := 'This line will end with a newline
	                             |Something cool or something.

					'.strip_margin()
	assert end_with_newline_stripped == end_with_newline
}

fn test_strip_margins_space_delimiter() {
	space_delimiter := ['Using a white-space char will', 'revert back to default behavior.'].join('\n')
	space_delimiter_stripped := 'Using a white-space char will
		|revert back to default behavior.'.strip_margin_custom(`\n`)
	assert space_delimiter == space_delimiter_stripped
}

fn test_strip_margins_crlf() {
	crlf := ["This string's line endings have CR as well as LFs.", 'This should pass', 'Definitely'].join('\r\n')
	crlf_stripped := "This string's line endings have CR as well as LFs.\r
	                 |This should pass\r
					 |Definitely".strip_margin()

	assert crlf == crlf_stripped
}