Enable running unit test and coverage in py3.

- Migrate run_tests.sh to python3
- Running run_tests.sh in py2 is not supported.

Bug: 157392770
Test: ./run_test.sh
./run_test_py2.sh
atest --host acloud_test
atest --host acloud_test_py3

Change-Id: Ibf6a535f36c9ebd196b075eed092c10992f338eb
diff --git a/run_tests.sh b/run_tests.sh
index c1be9ab..c1ee76f 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -14,6 +14,8 @@
         "dateutil"
         "google-api-python-client"
         "oauth2client"
+        "uritemplates"
+        "rsa"
     )
     for lib in ${third_party_libs[*]};
     do
@@ -27,8 +29,8 @@
     local test_results=$1
     local tmp_dir=$(mktemp -d)
     local rc_file=${ACLOUD_DIR}/.coveragerc
-    PYTHONPATH=$(get_python_path) python -m coverage report -m
-    PYTHONPATH=$(get_python_path) python -m coverage html -d $tmp_dir --rcfile=$rc_file
+    PYTHONPATH=$(get_python_path) python3 -m coverage report -m
+    PYTHONPATH=$(get_python_path) python3 -m coverage html -d $tmp_dir --rcfile=$rc_file
     echo "coverage report available at file://${tmp_dir}/index.html"
 
     if [[ $test_results -eq 0 ]]; then
@@ -41,16 +43,16 @@
 function run_unittests() {
     local specified_tests=$@
     local rc=0
-    local run_cmd="python -m coverage run --append"
+    local run_cmd="python3 -m coverage run --append"
 
     # clear previously collected coverage data.
-    PYTHONPATH=$(get_python_path) python -m coverage erase
+    PYTHONPATH=$(get_python_path) python3 -m coverage erase
 
     # Get all unit tests under tools/acloud.
     local all_tests=$(find $ACLOUD_DIR -type f -name "*_test.py" ! -name "acloud_test.py");
     local tests_to_run=$all_tests
 
-    # Filter out the tests if specifed.
+    # Filter out the tests if specified.
     if [[ ! -z $specified_tests ]]; then
         tests_to_run=()
         for t in $all_tests;
@@ -90,8 +92,8 @@
     local missing_py_packages=false
     for py_lib in {coverage,mock};
     do
-        if ! pip list | grep $py_lib &> /dev/null; then
-            echo "Missing required python package: $py_lib (pip install $py_lib)"
+        if ! python3 -m pip list | grep $py_lib &> /dev/null; then
+            echo "Missing required python package: $py_lib (python3 -m pip install $py_lib)"
             missing_py_packages=true
         fi
     done
diff --git a/run_tests_py2.sh b/run_tests_py2.sh
new file mode 100755
index 0000000..cb524c4
--- /dev/null
+++ b/run_tests_py2.sh
@@ -0,0 +1,123 @@
+#!/bin/bash
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+NC='\033[0m' # No Color
+ACLOUD_DIR=$(dirname $(realpath $0))
+TOOLS_DIR=$(dirname $ACLOUD_DIR)
+THIRD_PARTY_DIR=$(dirname $TOOLS_DIR)/external/python
+
+function get_python_path() {
+    local python_path=$TOOLS_DIR
+    local third_party_libs=(
+        "apitools"
+        "dateutil"
+        "google-api-python-client"
+        "oauth2client"
+    )
+    for lib in ${third_party_libs[*]};
+    do
+        python_path=$THIRD_PARTY_DIR/$lib:$python_path
+    done
+    python_path=$python_path:$PYTHONPATH
+    echo $python_path
+}
+
+function print_summary() {
+    local test_results=$1
+    local tmp_dir=$(mktemp -d)
+    local rc_file=${ACLOUD_DIR}/.coveragerc
+    PYTHONPATH=$(get_python_path) python -m coverage report -m
+    PYTHONPATH=$(get_python_path) python -m coverage html -d $tmp_dir --rcfile=$rc_file
+    echo "coverage report available at file://${tmp_dir}/index.html"
+
+    if [[ $test_results -eq 0 ]]; then
+        echo -e "${GREEN}All unittests pass${NC}!"
+    else
+        echo -e "${RED}There was a unittest failure${NC}"
+    fi
+}
+
+function run_unittests() {
+    local specified_tests=$@
+    local rc=0
+    local run_cmd="python -m coverage run --append"
+
+    # clear previously collected coverage data.
+    PYTHONPATH=$(get_python_path) python -m coverage erase
+
+    # Get all unit tests under tools/acloud.
+    local all_tests=$(find $ACLOUD_DIR -type f -name "*_test.py" ! -name "acloud_test.py");
+    local tests_to_run=$all_tests
+
+    # Filter out the tests if specified.
+    if [[ ! -z $specified_tests ]]; then
+        tests_to_run=()
+        for t in $all_tests;
+        do
+            for t_pattern in $specified_tests;
+            do
+                if [[ "$t" =~ "$t_pattern" ]]; then
+                    tests_to_run=("${tests_to_run[@]}" "$t")
+                fi
+            done
+        done
+    fi
+
+    for t in $tests_to_run;
+    do
+        if ! PYTHONPATH=$(get_python_path):$PYTHONPATH $run_cmd $t; then
+            rc=1
+            echo -e "${RED}$t failed${NC}"
+        fi
+    done
+
+    print_summary $rc
+    cleanup
+    exit $rc
+}
+
+function check_env() {
+    if [ -z "$ANDROID_HOST_OUT" ]; then
+        echo "Missing ANDROID_HOST_OUT env variable. Run 'lunch' first."
+        exit 1
+    fi
+    if [ ! -f "$ANDROID_HOST_OUT/bin/aprotoc" ]; then
+        echo "Missing aprotoc. Run 'm aprotoc' first."
+        exit 1
+    fi
+
+    local missing_py_packages=false
+    for py_lib in {coverage,mock};
+    do
+        if ! python -m pip list | grep $py_lib &> /dev/null; then
+            echo "Missing required python package: $py_lib (python -m pip install $py_lib)"
+            missing_py_packages=true
+        fi
+    done
+    if $missing_py_packages; then
+        exit 1
+    fi
+}
+
+function gen_proto_py() {
+    # Use aprotoc to generate python proto files.
+    local protoc_cmd=$ANDROID_HOST_OUT/bin/aprotoc
+    pushd $ACLOUD_DIR &> /dev/null
+    $protoc_cmd internal/proto/*.proto --python_out=./
+    touch internal/proto/__init__.py
+    popd &> /dev/null
+}
+
+function cleanup() {
+    # Search for *.pyc and delete them.
+    find $ACLOUD_DIR -name "*.pyc" -exec rm -f {} \;
+
+    # Delete the generated proto files too.
+    find $ACLOUD_DIR/internal/proto -name "*.py" -exec rm -f {} \;
+}
+
+check_env
+cleanup
+gen_proto_py
+run_unittests $@
diff --git a/setup/gcp_setup_runner_test.py b/setup/gcp_setup_runner_test.py
index fa12d1f..7e4dac4 100644
--- a/setup/gcp_setup_runner_test.py
+++ b/setup/gcp_setup_runner_test.py
@@ -19,7 +19,6 @@
 import os
 import mock
 import six
-from six import b
 
 # pylint: disable=no-name-in-module,import-error,no-member
 from acloud import errors
@@ -28,7 +27,7 @@
 from acloud.public import config
 from acloud.setup import gcp_setup_runner
 
-_GCP_USER_CONFIG = b("""
+_GCP_USER_CONFIG = """
 [compute]
 region = new_region
 zone = new_zone
@@ -36,8 +35,7 @@
 account = new@google.com
 disable_usage_reporting = False
 project = new_project
-""")
-
+"""
 
 def _CreateCfgFile():
     """A helper method that creates a mock configuration object."""
@@ -147,7 +145,7 @@
     @mock.patch.object(gcp_setup_runner, "GoogleSDKBins")
     def testSetupGcloudInfo(self, mock_sdk, mock_set, mock_run, mock_create):
         """test setup gcloud info"""
-        with mock.patch("google_sdk.GoogleSDK"):
+        with mock.patch("acloud.setup.google_sdk.GoogleSDK"):
             self.gcp_env_runner._SetupGcloudInfo()
             mock_sdk.assert_called_once()
             mock_set.assert_called_once()
diff --git a/setup/host_setup_runner_test.py b/setup/host_setup_runner_test.py
index e435be6..111540e 100644
--- a/setup/host_setup_runner_test.py
+++ b/setup/host_setup_runner_test.py
@@ -17,7 +17,6 @@
 import tempfile
 import unittest
 import mock
-from six import b
 
 from acloud.internal.lib import driver_test_lib
 from acloud.internal.lib import utils
@@ -30,13 +29,13 @@
 class CuttlefishHostSetupTest(driver_test_lib.BaseDriverTest):
     """Test CuttlsfishHostSetup."""
 
-    LSMOD_OUTPUT = b("""nvidia_modeset        860160  6 nvidia_drm
+    LSMOD_OUTPUT = """nvidia_modeset        860160  6 nvidia_drm
 module1                12312  1
 module2                12312  1
 ghash_clmulni_intel    16384  0
 aesni_intel           167936  3
 aes_x86_64             20480  1 aesni_intel
-lrw                    16384  1 aesni_intel""")
+lrw                    16384  1 aesni_intel"""
 
     # pylint: disable=invalid-name
     def setUp(self):
diff --git a/setup/setup_common_test.py b/setup/setup_common_test.py
index e17e529..5a00cfc 100644
--- a/setup/setup_common_test.py
+++ b/setup/setup_common_test.py
@@ -14,7 +14,6 @@
 """Tests for host_setup_runner."""
 import subprocess
 import unittest
-from six import b
 
 from acloud import errors
 from acloud.internal.lib import driver_test_lib
@@ -23,21 +22,21 @@
 
 class SetupCommonTest(driver_test_lib.BaseDriverTest):
     """Test HostPkgTaskRunner."""
-    PKG_INFO_INSTALLED = b("""fake_pkg:
+    PKG_INFO_INSTALLED = """fake_pkg:
   Installed: 0.7
   Candidate: 0.7
   Version table:
-""")
-    PKG_INFO_NONE_INSTALL = b("""fake_pkg:
+"""
+    PKG_INFO_NONE_INSTALL = """fake_pkg:
   Installed: (none)
   Candidate: 0.7
   Version table:
-""")
-    PKG_INFO_OLD_VERSION = b("""fake_pkg:
+"""
+    PKG_INFO_OLD_VERSION = """fake_pkg:
   Installed: 0.2
   Candidate: 0.7
   Version table:
-""")
+"""
 
     # pylint: disable=invalid-name
     def testPackageNotInstalled(self):