1# This test demonstrates dependency resolution when the main module imports a
2# new package from a previously-test-only dependency.
3#
4# When lazy loading is active, the loader will not load dependencies of any
5# module whose packages are *only* imported by tests outside the main module. If
6# the main module is changed to import a package from such a module, the
7# dependencies of that module will need to be reloaded.
8
9# The import graph used in this test looks like:
10#
11# m ---- a
12# \ |
13# \ a_test ---- b/x
14# \
15# --------------b/y (new) ---- c
16#
17# Where b/x and b/y are disjoint packages, but both contained in module b.
18#
19# The module dependency graph initially looks like:
20#
21# m ---- a.1 ---- b.1 ---- c.1
22#
23# This configuration is similar to that used in mod_lazy_new_import,
24# but the new import is from what is initially a test-only dependency.
25
26# Control case: in Go 1.14, the original go.mod is tidy,
27# and the dependency on c is eagerly loaded.
28
29cp go.mod go.mod.orig
30go mod tidy
31cmp go.mod.orig go.mod
32
33go list -m all
34stdout '^a v0.1.0 '
35stdout '^b v0.1.0 '
36stdout '^c v0.1.0 '
37
38# After adding a new import of b/y,
39# the import of c from b/y should resolve to the version required by b.
40
41cp m.go m.go.orig
42cp m.go.new m.go
43go mod tidy
44cmp go.mod.new go.mod
45
46go list -m all
47stdout '^a v0.1.0 '
48stdout '^b v0.1.0 '
49stdout '^c v0.1.0 '
50
51# With lazy loading, the go.mod requirements are the same,
52# but the dependency on c is initially pruned out.
53
54cp m.go.orig m.go
55cp go.mod.orig go.mod
56go mod edit -go=1.17
57go mod edit -go=1.17 go.mod.new
58
59cp go.mod go.mod.orig
60go mod tidy
61cmp go.mod.orig go.mod
62
63go list -m all
64stdout '^a v0.1.0 '
65stdout '^b v0.1.0 '
66! stdout '^c '
67
68# After adding a new direct import of b/y,
69# the existing version of b should be promoted to a root,
70# bringing the version of c required by b into the build list.
71
72cp m.go.new m.go
73go mod tidy
74cmp go.mod.lazy go.mod
75
76go list -m all
77stdout '^a v0.1.0 '
78stdout '^b v0.1.0 '
79stdout '^c v0.1.0 '
80
81-- m.go --
82package main
83
84import (
85 "fmt"
86
87 _ "a" // a_test imports b/x.
88)
89
90func main() {
91}
92-- m.go.new --
93package main
94
95import (
96 "fmt"
97
98 _ "a" // a_test imports b/x.
99 "b/y" // This is a new import, not yet reflected in the go.mod file.
100)
101
102func main() {
103 fmt.Println(b.CVersion())
104}
105-- go.mod --
106module m
107
108go 1.14
109
110require a v0.1.0
111
112replace (
113 a v0.1.0 => ./a1
114 b v0.1.0 => ./b1
115 c v0.1.0 => ./c1
116 c v0.2.0 => ./c2
117)
118-- go.mod.new --
119module m
120
121go 1.14
122
123require (
124 a v0.1.0
125 b v0.1.0
126)
127
128replace (
129 a v0.1.0 => ./a1
130 b v0.1.0 => ./b1
131 c v0.1.0 => ./c1
132 c v0.2.0 => ./c2
133)
134-- go.mod.lazy --
135module m
136
137go 1.17
138
139require (
140 a v0.1.0
141 b v0.1.0
142)
143
144require c v0.1.0 // indirect
145
146replace (
147 a v0.1.0 => ./a1
148 b v0.1.0 => ./b1
149 c v0.1.0 => ./c1
150 c v0.2.0 => ./c2
151)
152-- a1/go.mod --
153module a
154
155go 1.17
156
157require b v0.1.0
158-- a1/a.go --
159package a
160-- a1/a_test.go --
161package a_test
162
163import _ "b/x"
164-- b1/go.mod --
165module b
166
167go 1.17
168
169require c v0.1.0
170-- b1/x/x.go --
171package x
172-- b1/y/y.go --
173package y
174
175import "c"
176
177func CVersion() string {
178 return c.Version
179}
180-- c1/go.mod --
181module c
182
183go 1.17
184-- c1/c.go --
185package c
186
187const Version = "v0.1.0"
188-- c2/go.mod --
189This file should be unused.
190-- c2/c.go --
191This file should be unused.
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