Add tests for converting license in androidmk

1. Added unit tests for license conversions in the androidmk tool, by
using a mocked filesystem;
2. Added integration tests in a shell script with a mocked filesystem.

Bug: 205615944
Test: m androidmk
Test: bash androidmk_test.sh
Test: TreeHugger
Change-Id: Id3d1f914190b52b82aadda7ea019192787b839d6

tests/androidmk_test.sh

@@ -0,0 +1,135 @@
+#!/bin/bash -eu
+
+set -o pipefail
+
+# How to run: bash path-to-script/androidmk_test.sh
+# Tests of converting license functionality of the androidmk tool
+REAL_TOP="$(readlink -f "$(dirname "$0")"/../../..)"
+$REAL_TOP/build/soong/soong_ui.bash --make-mode androidmk
+
+source "$(dirname "$0")/lib.sh"
+
+# Expect to create a new license module
+function test_rewrite_license_property_inside_current_directory {
+  setup
+
+  # Create an Android.mk file
+  mkdir -p a/b
+  cat > a/b/Android.mk <<'EOF'
+include $(CLEAR_VARS)
+LOCAL_MODULE := foo
+LOCAL_LICENSE_KINDS := license_kind1 license_kind2
+LOCAL_LICENSE_CONDITIONS := license_condition
+LOCAL_NOTICE_FILE := $(LOCAL_PATH)/license_notice1 $(LOCAL_PATH)/license_notice2
+include $(BUILD_PACKAGE)
+EOF
+
+  # Create an expected Android.bp file for the module "foo"
+  cat > a/b/Android.bp <<'EOF'
+package {
+    // See: http://go/android-license-faq
+    default_applicable_licenses: [
+        "a_b_license",
+    ],
+}
+
+license {
+    name: "a_b_license",
+    visibility: [":__subpackages__"],
+    license_kinds: [
+        "license_kind1",
+        "license_kind2",
+    ],
+    license_text: [
+        "license_notice1",
+        "license_notice2",
+    ],
+}
+
+android_app {
+    name: "foo",
+}
+EOF
+
+  run_androidmk_test "a/b/Android.mk" "a/b/Android.bp"
+}
+
+# Expect to reference to an existing license module
+function test_rewrite_license_property_outside_current_directory {
+  setup
+
+  # Create an Android.mk file
+  mkdir -p a/b/c/d
+  cat > a/b/c/d/Android.mk <<'EOF'
+include $(CLEAR_VARS)
+LOCAL_MODULE := foo
+LOCAL_LICENSE_KINDS := license_kind1 license_kind2
+LOCAL_LICENSE_CONDITIONS := license_condition
+LOCAL_NOTICE_FILE := $(LOCAL_PATH)/../../license_notice1 $(LOCAL_PATH)/../../license_notice2
+include $(BUILD_PACKAGE)
+EOF
+
+  # Create an expected (input) Android.bp file at a/b/
+  cat > a/b/Android.bp <<'EOF'
+package {
+    // See: http://go/android-license-faq
+    default_applicable_licenses: [
+        "a_b_license",
+    ],
+}
+
+license {
+    name: "a_b_license",
+    visibility: [":__subpackages__"],
+    license_kinds: [
+        "license_kind1",
+        "license_kind2",
+    ],
+    license_text: [
+        "license_notice1",
+        "license_notice2",
+    ],
+}
+
+android_app {
+    name: "bar",
+}
+EOF
+
+  # Create an expected (output) Android.bp file for the module "foo"
+  cat > a/b/c/d/Android.bp <<'EOF'
+package {
+    // See: http://go/android-license-faq
+    default_applicable_licenses: [
+        "a_b_license",
+    ],
+}
+
+android_app {
+    name: "foo",
+}
+EOF
+
+  run_androidmk_test "a/b/c/d/Android.mk" "a/b/c/d/Android.bp"
+}
+
+run_androidmk_test () {
+  export ANDROID_BUILD_TOP="$MOCK_TOP"
+
+  local out=$($REAL_TOP/*/host/*/bin/androidmk "$1")
+  local expected=$(<"$2")
+
+  if [[ "$out" != "$expected" ]]; then
+    ANDROID_BUILD_TOP="$REAL_TOP"
+    cleanup_mock_top
+    fail "The output is not the same as the expected"
+  fi
+
+  ANDROID_BUILD_TOP="$REAL_TOP"
+  cleanup_mock_top
+  echo "Succeeded"
+}
+
+test_rewrite_license_property_inside_current_directory
+
+test_rewrite_license_property_outside_current_directory

tests/run_integration_tests.sh

@@ -3,6 +3,7 @@
 set -o pipefail
 
 TOP="$(readlink -f "$(dirname "$0")"/../../..)"
+"$TOP/build/soong/tests/androidmk_test.sh"
 "$TOP/build/soong/tests/bootstrap_test.sh"
 "$TOP/build/soong/tests/mixed_mode_test.sh"
 "$TOP/build/soong/tests/bp2build_bazel_test.sh"