LanguageTags/LanguageTagsTests/LanguageTagBuilderTests.cs at main · ptr727/LanguageTags · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
namespace ptr727.LanguageTags.Tests;

public sealed class LanguageTagBuilderTests : SingleInstanceFixture
{
    [Fact]
    public void Build_Pass()
    {
        // en-latn-gb-boont-r-extended-sequence-x-private
        LanguageTag languageTag = new LanguageTagBuilder()
            .Language("en")
            .Script("latn")
            .Region("gb")
            .VariantAdd("boont")
            .ExtensionAdd('r', ["extended", "sequence"])
            .PrivateUseAdd("private")
            .Build();
        _ = languageTag.Validate().Should().BeTrue();
        _ = languageTag.ToString().Should().Be("en-latn-gb-boont-r-extended-sequence-x-private");

        // en-a-bbb-x-a-ccc
        languageTag = new LanguageTagBuilder()
            .Language("en")
            .ExtensionAdd('a', ["bbb"])
            .PrivateUseAddRange(["a", "ccc"])
            .Build();
        _ = languageTag.Validate().Should().BeTrue();
        _ = languageTag.ToString().Should().Be("en-a-bbb-x-a-ccc");

        // en-b-ccc-a-bbb-aaa-x-ccc-a
        languageTag = new LanguageTagBuilder()
            .Language("en")
            .ExtensionAdd('b', ["ccc"])
            .ExtensionAdd('a', ["bbb", "aaa"])
            .PrivateUseAddRange(["ccc", "a"])
            .Build();
        _ = languageTag.Validate().Should().BeTrue();
        _ = languageTag.ToString().Should().Be("en-b-ccc-a-bbb-aaa-x-ccc-a");

        // zh
        languageTag = new LanguageTagBuilder().Language("zh").Build();
        _ = languageTag.Validate().Should().BeTrue();
        _ = languageTag.ToString().Should().Be("zh");

        // zh-yue
        languageTag = new LanguageTagBuilder().Language("zh").ExtendedLanguage("yue").Build();
        _ = languageTag.Validate().Should().BeTrue();
        _ = languageTag.ToString().Should().Be("zh-yue");

        // sr-latn
        languageTag = new LanguageTagBuilder().Language("sr").Script("latn").Build();
        _ = languageTag.Validate().Should().BeTrue();
        _ = languageTag.ToString().Should().Be("sr-latn");

        // x-all-private
        languageTag = new LanguageTagBuilder().PrivateUseAddRange(["all", "private"]).Build();
        _ = languageTag.Validate().Should().BeTrue();
        _ = languageTag.ToString().Should().Be("x-all-private");
    }

    [Fact]
    public void Normalize_Pass()
    {
        // en-Latn-GB-boont-r-extended-sequence-x-private
        LanguageTag? languageTag = new LanguageTagBuilder()
            .Language("en")
            .Script("latn")
            .Region("gb")
            .VariantAdd("boont")
            .ExtensionAdd('r', ["extended", "sequence"])
            .PrivateUseAdd("private")
            .Normalize();
        _ = languageTag.Should().NotBeNull();
        _ = languageTag.Validate().Should().BeTrue();
        _ = languageTag.ToString().Should().Be("en-GB-boont-r-extended-sequence-x-private");

        // sr-Latn
        languageTag = new LanguageTagBuilder().Language("sr").Script("latn").Normalize();
        _ = languageTag.Should().NotBeNull();
        _ = languageTag.Validate().Should().BeTrue();
        _ = languageTag.ToString().Should().Be("sr-Latn");

        // en-a-aaa-bbb-b-ccc-x-a-ccc
        languageTag = new LanguageTagBuilder()
            .Language("en")
            .ExtensionAdd('b', ["ccc"]) // Add b before a to force a sort
            .ExtensionAdd('a', ["bbb", "aaa"]) // Add bbb before aaa to force a sort
            .PrivateUseAddRange(["ccc", "a"]) // Add ccc before a to force a sort
            .Normalize();
        _ = languageTag.Should().NotBeNull();
        _ = languageTag.Validate().Should().BeTrue();
        _ = languageTag.ToString().Should().Be("en-a-aaa-bbb-b-ccc-x-a-ccc");
    }

    [Fact]
    public void Build_Fail()
    {
        // Must have something
        LanguageTag languageTag = new LanguageTagBuilder().Build();
        _ = languageTag.Validate().Should().BeFalse();

        // Language 2-4 chars
        languageTag = new LanguageTagBuilder().Language("a").Build();
        _ = languageTag.Validate().Should().BeFalse();
        languageTag = new LanguageTagBuilder().Language("abcdefghi").Build();
        _ = languageTag.Validate().Should().BeFalse();

        // Extended Language 3 chars
        languageTag = new LanguageTagBuilder().Language("en").ExtendedLanguage("ab").Build();
        _ = languageTag.Validate().Should().BeFalse();

        // Script 4 chars
        languageTag = new LanguageTagBuilder().Language("en").Script("abc").Build();
        _ = languageTag.Validate().Should().BeFalse();

        // Region 2-3 chars
        languageTag = new LanguageTagBuilder().Language("en").Region("a").Build();
        _ = languageTag.Validate().Should().BeFalse();

        // Variant, 4+ chars start digit, 5+ chars start alpha
        languageTag = new LanguageTagBuilder().Language("en").VariantAdd("abcd").Build();
        _ = languageTag.Validate().Should().BeFalse();
        languageTag = new LanguageTagBuilder().Language("en").VariantAdd("012").Build();
        _ = languageTag.Validate().Should().BeFalse();

        // Extension prefix 1 char, not x
        languageTag = new LanguageTagBuilder().Language("en").ExtensionAdd('x', ["abcd"]).Build();
        _ = languageTag.Validate().Should().BeFalse();

        // Extension tags must not be whitespace
        languageTag = new LanguageTagBuilder().Language("en").ExtensionAdd('a', [" "]).Build();
        _ = languageTag.Validate().Should().BeFalse();
    }

    [Fact]
    public void VariantAddRange_AddsMultipleVariants()
    {
        LanguageTag languageTag = new LanguageTagBuilder()
            .Language("en")
            .VariantAddRange(["variant1", "variant2", "variant3"])
            .Build();

        _ = languageTag.Variants.Length.Should().Be(3);
        _ = languageTag.Variants[0].Should().Be("variant1");
        _ = languageTag.Variants[1].Should().Be("variant2");
        _ = languageTag.Variants[2].Should().Be("variant3");
    }

    [Fact]
    public void VariantAddRange_ThrowsOnNull()
    {
        LanguageTagBuilder builder = new();
        _ = Assert
            .Throws<ArgumentNullException>(() => builder.VariantAddRange(null!))
            .Should()
            .NotBeNull();
    }

    [Fact]
    public void ExtensionAdd_ThrowsOnNull()
    {
        LanguageTagBuilder builder = new();
        _ = Assert
            .Throws<ArgumentNullException>(() => builder.ExtensionAdd('u', null!))
            .Should()
            .NotBeNull();
    }

    [Fact]
    public void ExtensionAdd_ThrowsOnEmpty()
    {
        LanguageTagBuilder builder = new();
        _ = Assert
            .Throws<ArgumentException>(() => builder.ExtensionAdd('u', []))
            .Should()
            .NotBeNull();
    }

    [Fact]
    public void PrivateUseAddRange_ThrowsOnNull()
    {
        LanguageTagBuilder builder = new();
        _ = Assert
            .Throws<ArgumentNullException>(() => builder.PrivateUseAddRange(null!))
            .Should()
            .NotBeNull();
    }
}