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# Some primitives for checking the state of fake screen objects.
# validate data on screen regardless of attributes (color, bold, etc.)
# Mu doesn't have multi-line strings, so we provide functions for rows or portions of rows.
# Tab characters (that translate into multiple screen cells) not supported.
fn check-screen-row screen: (addr screen), y: int, expected: (addr array byte), msg: (addr array byte) {
check-screen-row-from screen, y, 0, expected, msg
}
fn check-screen-row-from screen-on-stack: (addr screen), x: int, y: int, expected: (addr array byte), msg: (addr array byte) {
var screen/esi: (addr screen) <- copy screen-on-stack
var idx/ecx: int <- screen-cell-index screen, y, x
# compare 'expected' with the screen contents starting at 'idx', grapheme by grapheme
var e: (stream byte 0x100)
var e-addr/edx: (addr stream byte) <- address e
write e-addr, expected
{
var done?/eax: boolean <- stream-empty? e-addr
compare done?, 0
break-if-!=
var _g/eax: grapheme <- screen-grapheme-at-idx screen, idx
var g/ebx: grapheme <- copy _g
var expected-grapheme/eax: grapheme <- read-grapheme e-addr
# compare graphemes
$check-screen-row-from:compare-graphemes: {
# if expected-grapheme is space, null grapheme is also ok
{
compare expected-grapheme, 0x20
break-if-!=
compare g, 0
break-if-= $check-screen-row-from:compare-graphemes
}
# if (g == expected-grapheme) print "."
compare g, expected-grapheme
{
break-if-!=
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, ".", 3 # 3=cyan
break $check-screen-row-from:compare-graphemes
}
# otherwise print an error
count-test-failure
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, msg, 3 # 3=cyan
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, ": expected '", 3
draw-grapheme-at-cursor 0, expected-grapheme, 3
move-cursor-rightward-and-downward 0, 0, 0x80 # screen-width
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, "' at (", 3
draw-int32-hex-wrapping-right-then-down-from-cursor-over-full-screen 0, x, 3
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, ", ", 3
draw-int32-hex-wrapping-right-then-down-from-cursor-over-full-screen 0, y, 3
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, ") but observed '", 3
draw-grapheme-at-cursor 0, g, 3
move-cursor-rightward-and-downward 0, 0, 0x80 # screen-width
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, "'", 3
}
idx <- increment
increment x
loop
}
}
# various variants by screen-cell attribute; spaces in the 'expected' data should not match the attribute
fn check-screen-row-in-color screen: (addr screen), fg: int, y: int, expected: (addr array byte), msg: (addr array byte) {
check-screen-row-in-color-from screen, fg, y, 0, expected, msg
}
fn check-screen-row-in-color-from screen-on-stack: (addr screen), fg: int, y: int, x: int, expected: (addr array byte), msg: (addr array byte) {
var screen/esi: (addr screen) <- copy screen-on-stack
var idx/ecx: int <- screen-cell-index screen, y, x
# compare 'expected' with the screen contents starting at 'idx', grapheme by grapheme
var e: (stream byte 0x100)
var e-addr/edx: (addr stream byte) <- address e
write e-addr, expected
{
var done?/eax: boolean <- stream-empty? e-addr
compare done?, 0
break-if-!=
var _g/eax: grapheme <- screen-grapheme-at-idx screen, idx
var g/ebx: grapheme <- copy _g
var _expected-grapheme/eax: grapheme <- read-grapheme e-addr
var expected-grapheme/edi: grapheme <- copy _expected-grapheme
$check-screen-row-in-color-from:compare-cells: {
# if expected-grapheme is space, null grapheme is also ok
{
compare expected-grapheme, 0x20
break-if-!=
compare g, 0
break-if-= $check-screen-row-in-color-from:compare-cells
}
# if expected-grapheme is space, a different color is ok
{
compare expected-grapheme, 0x20
break-if-!=
var color/eax: int <- screen-color-at-idx screen, idx
compare color, fg
break-if-!= $check-screen-row-in-color-from:compare-cells
}
# compare graphemes
$check-screen-row-in-color-from:compare-graphemes: {
# if (g == expected-grapheme) print "."
compare g, expected-grapheme
{
break-if-!=
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, ".", 3 # 3=cyan
break $check-screen-row-in-color-from:compare-graphemes
}
# otherwise print an error
count-test-failure
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, msg, 3 # 3=cyan
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, ": expected '", 3
draw-grapheme-at-cursor 0, expected-grapheme, 3
move-cursor-rightward-and-downward 0, 0, 0x80 # screen-width
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, "' at (", 3
draw-int32-hex-wrapping-right-then-down-from-cursor-over-full-screen 0, x, 3
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, ", ", 3
draw-int32-hex-wrapping-right-then-down-from-cursor-over-full-screen 0, y, 3
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, ") but observed '", 3
draw-grapheme-at-cursor 0, g, 3
move-cursor-rightward-and-downward 0, 0, 0x80 # screen-width
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, "'", 3
}
$check-screen-row-in-color-from:compare-colors: {
var color/eax: int <- screen-color-at-idx screen, idx
compare fg, color
{
break-if-!=
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, ".", 3 # 3=cyan
break $check-screen-row-in-color-from:compare-colors
}
# otherwise print an error
count-test-failure
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, msg, 3 # 3=cyan
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, ": expected '", 3
draw-grapheme-at-cursor 0, expected-grapheme, 3
move-cursor-rightward-and-downward 0, 0, 0x80 # screen-width
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, "' at (", 3
draw-int32-hex-wrapping-right-then-down-from-cursor-over-full-screen 0, x, 3
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, ", ", 3
draw-int32-hex-wrapping-right-then-down-from-cursor-over-full-screen 0, y, 3
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, ") in color ", 3
draw-int32-hex-wrapping-right-then-down-from-cursor-over-full-screen 0, fg, 3
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, " but observed color ", 3
draw-int32-hex-wrapping-right-then-down-from-cursor-over-full-screen 0, color, 3
}
}
idx <- increment
increment x
loop
}
}
fn test-draw-single-grapheme {
var screen-on-stack: screen
var screen/esi: (addr screen) <- address screen-on-stack
initialize-screen screen, 5, 4
var c/eax: grapheme <- copy 0x61 # 'a'
draw-grapheme screen, c, 0, 0, 1 # color=1
check-screen-row screen, 0, "a", "F - test-draw-single-grapheme" # top-left corner of the screen
}
fn test-draw-multiple-graphemes {
var screen-on-stack: screen
var screen/esi: (addr screen) <- address screen-on-stack
initialize-screen screen, 0x10, 4
draw-text-wrapping-right-then-down-from-cursor-over-full-screen screen, "Hello, 世界", 1 # color=1
check-screen-row screen, 0, "Hello, 世界", "F - test-draw-multiple-graphemes"
}
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