added the rest of the tests

exercism · Feb 17, 2024 · fc2c89a · fc2c89a
1 parent 0cd5fa1
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diff --git a/exercises/practice/roman-numerals/.meta/example.zig b/exercises/practice/roman-numerals/.meta/example.zig
@@ -1,8 +1,42 @@
 const std = @import("std");
 const mem = std.mem;
+const allocPrint = std.fmt.allocPrint;
+
+const DigitValue = struct {
+    value: i16,
+    digit: []const u8,
+};
+
+const max_result_size = 10;
+
+var digitValues = [_]DigitValue{
+    .{ .value = 1000, .digit = "M" },
+    .{ .value = 900, .digit = "CM" },
+    .{ .value = 500, .digit = "D" },
+    .{ .value = 400, .digit = "CD" },
+    .{ .value = 100, .digit = "C" },
+    .{ .value = 90, .digit = "XC" },
+    .{ .value = 50, .digit = "L" },
+    .{ .value = 40, .digit = "XL" },
+    .{ .value = 10, .digit = "X" },
+    .{ .value = 9, .digit = "IX" },
+    .{ .value = 5, .digit = "V" },
+    .{ .value = 4, .digit = "IV" },
+    .{ .value = 1, .digit = "I" },
+};
 
 pub fn toRoman(allocator: mem.Allocator, arabicNumeral: i16) mem.Allocator.Error![]u8 {
-    _ = allocator;
-    _ = arabicNumeral;
-    @compileError("please implement the toRoman function");
+    var tmp: [10]u8 = undefined;
+    var numeral: i16 = arabicNumeral;
+    var len: usize = 0;
+    for (digitValues) |dv| {
+        while (numeral >= dv.value) {
+            std.mem.copy(u8, tmp[len..], dv.digit);
+            len += dv.digit.len;
+            numeral -= dv.value;
+        }
+    }
+    var result = try allocator.alloc(u8, len);
+    std.mem.copy(u8, result, tmp[0..len]);
+    return result;
 }
diff --git a/exercises/practice/roman-numerals/test_roman_numerals.zig b/exercises/practice/roman-numerals/test_roman_numerals.zig
@@ -9,3 +9,178 @@ test "1 is I" {
     defer testing.allocator.free(actual);
     try testing.expectEqualStrings(expected, actual);
 }
+
+test "2 is II" {
+    const expected = "II";
+    const actual = try toRoman(testing.allocator, 2);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "3 is III" {
+    const expected = "III";
+    const actual = try toRoman(testing.allocator, 3);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "4 is IV" {
+    const expected = "IV";
+    const actual = try toRoman(testing.allocator, 4);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "5 is V" {
+    const expected = "V";
+    const actual = try toRoman(testing.allocator, 5);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "6 is VI" {
+    const expected = "VI";
+    const actual = try toRoman(testing.allocator, 6);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "9 is IX" {
+    const expected = "IX";
+    const actual = try toRoman(testing.allocator, 9);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "16 is XVI" {
+    const expected = "XVI";
+    const actual = try toRoman(testing.allocator, 16);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "27 is XXVII" {
+    const expected = "XXVII";
+    const actual = try toRoman(testing.allocator, 27);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "48 is XLVIII" {
+    const expected = "XLVIII";
+    const actual = try toRoman(testing.allocator, 48);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "49 is XLIX" {
+    const expected = "XLIX";
+    const actual = try toRoman(testing.allocator, 49);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "59 is LIX" {
+    const expected = "LIX";
+    const actual = try toRoman(testing.allocator, 59);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "66 is LXVI" {
+    const expected = "LXVI";
+    const actual = try toRoman(testing.allocator, 66);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "93 is XCIII" {
+    const expected = "XCIII";
+    const actual = try toRoman(testing.allocator, 93);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "141 is CXLI" {
+    const expected = "CXLI";
+    const actual = try toRoman(testing.allocator, 141);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "163 is CLXIII" {
+    const expected = "CLXIII";
+    const actual = try toRoman(testing.allocator, 163);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "166 is CLXVI" {
+    const expected = "CLXVI";
+    const actual = try toRoman(testing.allocator, 166);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "402 is CDII" {
+    const expected = "CDII";
+    const actual = try toRoman(testing.allocator, 402);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "575 is DLXXV" {
+    const expected = "DLXXV";
+    const actual = try toRoman(testing.allocator, 575);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "666 is DCLXVI" {
+    const expected = "DCLXVI";
+    const actual = try toRoman(testing.allocator, 666);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "911 is CMXI" {
+    const expected = "CMXI";
+    const actual = try toRoman(testing.allocator, 911);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "1024 is MXXIV" {
+    const expected = "MXXIV";
+    const actual = try toRoman(testing.allocator, 1024);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "1666 is MDCLXVI" {
+    const expected = "MDCLXVI";
+    const actual = try toRoman(testing.allocator, 1666);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "3000 is MMM" {
+    const expected = "MMM";
+    const actual = try toRoman(testing.allocator, 3000);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "3001 is MMMI" {
+    const expected = "MMMI";
+    const actual = try toRoman(testing.allocator, 3001);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}
+
+test "3999 is MMMCMXCIX" {
+    const expected = "MMMCMXCIX";
+    const actual = try toRoman(testing.allocator, 3999);
+    defer testing.allocator.free(actual);
+    try testing.expectEqualStrings(expected, actual);
+}