// A failing row aborts via the assert/abort builtin (task #5 @test
// conversion).
//
// Vectors mirror Hare's @test fn strcasecmp in ref/hare/ascii/string.ha.

package ascii_test;

import ascii;

// checkfold — one table row: strlower(in) == lo and strupper(in) == up.
fn checkfold(in: str, lo: str, up: str) void = {
	match (ascii.strlower(in)) {
	case let got: str => { assert(!(got != lo)); };
	case nomem        => { abort(); };
	};
	match (ascii.strupper(in)) {
	case let got: str => { assert(!(got != up)); };
	case nomem        => { abort(); };
	};
};

// ref/hare/ascii/string.ha:70 case-fold vectors. The こ row pins that a
// UTF-8 multibyte sequence (all bytes >=0x80) passes through unchanged.
@test fn strfold_cases() void = {
	checkfold("ABC", "abc", "ABC");
	checkfold("abc", "abc", "ABC");
	checkfold("[[[", "[[[", "[[[");
	checkfold("こ", "こ", "こ");
	checkfold("", "", "");
	checkfold("aB1z", "ab1z", "AB1Z");
};

// checkbuf — strlower_buf/strupper_buf into an exactly-sized buf.
fn checkbuf(in: str, lo: str, up: str) void = {
	let lstore: [16]u8; let lbuf: []u8 = lstore[0:16]; lbuf.len = 0;
	match (ascii.strlower_buf(in, lbuf)) {
	case let got: str => { assert(!(got != lo)); };
	case nomem        => { abort(); };
	};
	let ustore: [16]u8; let ubuf: []u8 = ustore[0:16]; ubuf.len = 0;
	match (ascii.strupper_buf(in, ubuf)) {
	case let got: str => { assert(!(got != up)); };
	case nomem        => { abort(); };
	};
};

@test fn strfold_buf_cases() void = {
	checkbuf("ABC", "abc", "ABC");
	checkbuf("aB1z", "ab1z", "AB1Z");
	checkbuf("", "", "");
	// non-ASCII pins UTF-8 multibyte passthrough through the _buf path
	// directly (all bytes >=0x80, untouched by the byte-wise fold).
	checkbuf("こ", "こ", "こ");
	// cap exactly == s.len must succeed — pins the `<` boundary in the
	// buf.cap check (a `<=` off-by-one would wrongly return nomem here).
	let exact: [3]u8; let ebuf: []u8 = exact[0:3]; ebuf.len = 0;
	match (ascii.strlower_buf("ABC", ebuf)) {
	case let got: str => { assert(!(got != "abc")); };
	case nomem        => { abort(); };
	};
	let small: [2]u8; let sbuf: []u8 = small[0:2]; sbuf.len = 0;
	match (ascii.strlower_buf("ABC", sbuf)) {
	case let got: str => { abort(); };
	case nomem        => void;
	};
};