1// Go support for Protocol Buffers - Google's data interchange format
2//
3// Copyright 2013 The Go Authors.  All rights reserved.
4// https://github.com/golang/protobuf
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
8// met:
9//
10//     * Redistributions of source code must retain the above copyright
11// notice, this list of conditions and the following disclaimer.
12//     * Redistributions in binary form must reproduce the above
13// copyright notice, this list of conditions and the following disclaimer
14// in the documentation and/or other materials provided with the
15// distribution.
16//     * Neither the name of Google Inc. nor the names of its
17// contributors may be used to endorse or promote products derived from
18// this software without specific prior written permission.
19//
20// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31
32package generator
33
34import (
35	"testing"
36
37	"github.com/golang/protobuf/protoc-gen-go/descriptor"
38)
39
40func TestCamelCase(t *testing.T) {
41	tests := []struct {
42		in, want string
43	}{
44		{"one", "One"},
45		{"one_two", "OneTwo"},
46		{"_my_field_name_2", "XMyFieldName_2"},
47		{"Something_Capped", "Something_Capped"},
48		{"my_Name", "My_Name"},
49		{"OneTwo", "OneTwo"},
50		{"_", "X"},
51		{"_a_", "XA_"},
52	}
53	for _, tc := range tests {
54		if got := CamelCase(tc.in); got != tc.want {
55			t.Errorf("CamelCase(%q) = %q, want %q", tc.in, got, tc.want)
56		}
57	}
58}
59
60func TestGoPackageOption(t *testing.T) {
61	tests := []struct {
62		in      string
63		impPath GoImportPath
64		pkg     GoPackageName
65		ok      bool
66	}{
67		{"", "", "", false},
68		{"foo", "", "foo", true},
69		{"github.com/golang/bar", "github.com/golang/bar", "bar", true},
70		{"github.com/golang/bar;baz", "github.com/golang/bar", "baz", true},
71		{"github.com/golang/string", "github.com/golang/string", "string", true},
72	}
73	for _, tc := range tests {
74		d := &FileDescriptor{
75			FileDescriptorProto: &descriptor.FileDescriptorProto{
76				Options: &descriptor.FileOptions{
77					GoPackage: &tc.in,
78				},
79			},
80		}
81		impPath, pkg, ok := d.goPackageOption()
82		if impPath != tc.impPath || pkg != tc.pkg || ok != tc.ok {
83			t.Errorf("go_package = %q => (%q, %q, %t), want (%q, %q, %t)", tc.in,
84				impPath, pkg, ok, tc.impPath, tc.pkg, tc.ok)
85		}
86	}
87}
88
89func TestPackageNames(t *testing.T) {
90	g := New()
91	g.packageNames = make(map[GoImportPath]GoPackageName)
92	g.usedPackageNames = make(map[GoPackageName]bool)
93	for _, test := range []struct {
94		importPath GoImportPath
95		want       GoPackageName
96	}{
97		{"github.com/golang/foo", "foo"},
98		{"github.com/golang/second/package/named/foo", "foo1"},
99		{"github.com/golang/third/package/named/foo", "foo2"},
100		{"github.com/golang/conflicts/with/predeclared/ident/string", "string1"},
101	} {
102		if got := g.GoPackageName(test.importPath); got != test.want {
103			t.Errorf("GoPackageName(%v) = %v, want %v", test.importPath, got, test.want)
104		}
105	}
106}
107
108func TestUnescape(t *testing.T) {
109	tests := []struct {
110		in  string
111		out string
112	}{
113		// successful cases, including all kinds of escapes
114		{"", ""},
115		{"foo bar baz frob nitz", "foo bar baz frob nitz"},
116		{`\000\001\002\003\004\005\006\007`, string([]byte{0, 1, 2, 3, 4, 5, 6, 7})},
117		{`\a\b\f\n\r\t\v\\\?\'\"`, string([]byte{'\a', '\b', '\f', '\n', '\r', '\t', '\v', '\\', '?', '\'', '"'})},
118		{`\x10\x20\x30\x40\x50\x60\x70\x80`, string([]byte{16, 32, 48, 64, 80, 96, 112, 128})},
119		// variable length octal escapes
120		{`\0\018\222\377\3\04\005\6\07`, string([]byte{0, 1, '8', 0222, 255, 3, 4, 5, 6, 7})},
121		// malformed escape sequences left as is
122		{"foo \\g bar", "foo \\g bar"},
123		{"foo \\xg0 bar", "foo \\xg0 bar"},
124		{"\\", "\\"},
125		{"\\x", "\\x"},
126		{"\\xf", "\\xf"},
127		{"\\777", "\\777"}, // overflows byte
128	}
129	for _, tc := range tests {
130		s := unescape(tc.in)
131		if s != tc.out {
132			t.Errorf("doUnescape(%q) = %q; should have been %q", tc.in, s, tc.out)
133		}
134	}
135}
136