platform_build_soong/android/rule_builder_test.go

// Copyright 2019 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package android

import (
	"io/ioutil"
	"os"
	"path/filepath"
	"reflect"
	"testing"
)

func TestRuleBuilder(t *testing.T) {
	rule := RuleBuilder{}

	cmd := rule.Command().
		Flag("Flag").
		FlagWithArg("FlagWithArg=", "arg").
		FlagWithInput("FlagWithInput=", "input").
		FlagWithOutput("FlagWithOutput=", "output").
		Implicit("Implicit").
		ImplicitOutput("ImplicitOutput").
		Input("Input").
		Output("Output").
		Text("Text").
		Tool("Tool")

	rule.Command().
		Text("command2").
		Input("input2").
		Output("output2").
		Tool("tool2")

	// Test updates to the first command after the second command has been started
	cmd.Text("after command2")
	// Test updating a command when the previous update did not replace the cmd variable
	cmd.Text("old cmd")

	// Test a command that uses the output of a previous command as an input
	rule.Command().
		Text("command3").
		Input("input3").
		Input("output2").
		Output("output3")

	wantCommands := []string{
		"Flag FlagWithArg=arg FlagWithInput=input FlagWithOutput=output Input Output Text Tool after command2 old cmd",
		"command2 input2 output2 tool2",
		"command3 input3 output2 output3",
	}
	wantInputs := []string{"Implicit", "Input", "input", "input2", "input3"}
	wantOutputs := []string{"ImplicitOutput", "Output", "output", "output2", "output3"}
	wantTools := []string{"Tool", "tool2"}

	if !reflect.DeepEqual(rule.Commands(), wantCommands) {
		t.Errorf("\nwant rule.Commands() = %#v\n                   got %#v", wantCommands, rule.Commands())
	}
	if !reflect.DeepEqual(rule.Inputs(), wantInputs) {
		t.Errorf("\nwant rule.Inputs() = %#v\n                 got %#v", wantInputs, rule.Inputs())
	}
	if !reflect.DeepEqual(rule.Outputs(), wantOutputs) {
		t.Errorf("\nwant rule.Outputs() = %#v\n                  got %#v", wantOutputs, rule.Outputs())
	}
	if !reflect.DeepEqual(rule.Tools(), wantTools) {
		t.Errorf("\nwant rule.Tools() = %#v\n                got %#v", wantTools, rule.Tools())
	}
}

func testRuleBuilderFactory() Module {
	module := &testRuleBuilderModule{}
	module.AddProperties(&module.properties)
	InitAndroidModule(module)
	return module
}

type testRuleBuilderModule struct {
	ModuleBase
	properties struct {
		Src string
	}
}

func (t *testRuleBuilderModule) GenerateAndroidBuildActions(ctx ModuleContext) {
	rule := RuleBuilder{}

	in := PathForSource(ctx, t.properties.Src)
	out := PathForModuleOut(ctx, ctx.ModuleName())

	rule.Command().Tool("cp").Input(in.String()).Output(out.String())

	rule.Build(pctx, ctx, "rule", "desc")
}

func TestRuleBuilder_Build(t *testing.T) {
	buildDir, err := ioutil.TempDir("", "soong_test_rule_builder")
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(buildDir)

	bp := `
		rule_builder_test {
			name: "foo",
			src: "bar",
		}
	`

	config := TestConfig(buildDir, nil)
	ctx := NewTestContext()
	ctx.MockFileSystem(map[string][]byte{
		"Android.bp": []byte(bp),
		"bar":        nil,
		"cp":         nil,
	})
	ctx.RegisterModuleType("rule_builder_test", ModuleFactoryAdaptor(testRuleBuilderFactory))
	ctx.Register()

	_, errs := ctx.ParseFileList(".", []string{"Android.bp"})
	FailIfErrored(t, errs)
	_, errs = ctx.PrepareBuildActions(config)
	FailIfErrored(t, errs)

	foo := ctx.ModuleForTests("foo", "").Rule("rule")

	// TODO: make RuleParams accessible to tests and verify rule.Command().Tools() ends up in CommandDeps

	if len(foo.Implicits) != 1 || foo.Implicits[0].String() != "bar" {
		t.Errorf("want foo.Implicits = [%q], got %q", "bar", foo.Implicits.Strings())
	}

	wantOutput := filepath.Join(buildDir, ".intermediates", "foo", "foo")
	if len(foo.Outputs) != 1 || foo.Outputs[0].String() != wantOutput {
		t.Errorf("want foo.Outputs = [%q], got %q", wantOutput, foo.Outputs.Strings())
	}

}