zuzu-rust 0.6.0

Rust implementation of ZuzuScript
Documentation 
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from std/tui import ansi_esc, supports_ansi, colour_text;
from test/more import *;

let esc := ansi_esc();

is( length esc, 1, "ansi_esc returns one character" );
is( length( esc _ "[0m" ), 4, "ansi_esc composes ANSI sequences" );

if ( supports_ansi() ) {
	is(
		colour_text( "Warning", "yellow" ),
		esc _ "[33mWarning" _ esc _ "[0m",
		"colour_text wraps yellow when ANSI is supported"
	);
	is(
		colour_text( "Input", "cyan" ),
		esc _ "[36mInput" _ esc _ "[0m",
		"colour_text wraps cyan when ANSI is supported"
	);
}
else {
	is(
		colour_text( "Warning", "yellow" ),
		"Warning",
		"colour_text leaves text unchanged when ANSI is unsupported"
	);
	is(
		colour_text( "Input", "cyan" ),
		"Input",
		"colour_text leaves cyan text unchanged when ANSI is unsupported"
	);
}

is(
	colour_text( "Plain", "not-a-colour" ),
	"Plain",
	"colour_text ignores unknown colours"
);

done_testing();