Tests: using modules in Go.

test/unit/applications/lang/go.py

@@ -1,4 +1,5 @@
 import os
+import shutil
 import subprocess
 
 from unit.applications.proto import TestApplicationProto
@@ -6,14 +7,25 @@ from unit.option import option
 
 
 class TestApplicationGo(TestApplicationProto):
-    def prepare_env(self, script, name, static=False):
-        if not os.path.exists(option.temp_dir + '/go'):
-            os.mkdir(option.temp_dir + '/go')
+    @staticmethod
+    def prepare_env(script, name='app', static=False):
+        temp_dir = option.temp_dir + '/go/'
+
+        if not os.path.exists(temp_dir):
+            os.mkdir(temp_dir)
+
+        cache_dir = option.cache_dir + '/go-build'
+
+        if not os.path.exists(cache_dir):
+            os.mkdir(cache_dir)
 
         env = os.environ.copy()
         env['GOPATH'] = option.current_dir + '/build/go'
-        env['GOCACHE'] = option.cache_dir + '/go'
-        env['GO111MODULE'] = 'auto'
+        env['GOCACHE'] = cache_dir
+
+        shutil.copy2(
+            option.test_dir + '/go/' + script + '/' + name + '.go',
+            temp_dir)
 
         if static:
             args = [
@@ -24,23 +36,32 @@ class TestApplicationGo(TestApplicationProto):
                 '-ldflags',
                 '-extldflags "-static"',
                 '-o',
-                option.temp_dir + '/go/' + name,
-                option.test_dir + '/go/' + script + '/' + name + '.go',
+                temp_dir + name,
+                temp_dir + name + '.go',
             ]
         else:
             args = [
                 'go',
                 'build',
                 '-o',
-                option.temp_dir + '/go/' + name,
-                option.test_dir + '/go/' + script + '/' + name + '.go',
+                temp_dir + name,
+                temp_dir + name + '.go',
             ]
 
+        replace_path = option.current_dir + '/build/go/src/unit.nginx.org/go'
+
+        with open(temp_dir + 'go.mod', 'w') as f:
+            f.write(
+                f"""module test/app
+require unit.nginx.org/go v0.0.0
+replace unit.nginx.org/go => {replace_path}
+""")
+
         if option.detailed:
             print("\n$ GOPATH=" + env['GOPATH'] + " " + " ".join(args))
 
         try:
-            process = subprocess.run(args, env=env)
+            process = subprocess.run(args, env=env, cwd=temp_dir)
 
         except KeyboardInterrupt:
             raise
@@ -61,7 +82,7 @@ class TestApplicationGo(TestApplicationProto):
             executable = "/go/" + name
             static_build = True
 
-        self.prepare_env(script, name, static=static_build)
+        TestApplicationGo.prepare_env(script, name, static=static_build)
 
         conf = {
             "listeners": {"*:7080": {"pass": "applications/" + script}},