Add tests for bazel_handler

Test: go test
Test: m nothing
Test: bp2build generate && sync; mixed build libc
Change-Id: Id4307a9e735b50221a8effb963325aaa57c3c7d0

android/bazel_handler_test.go

@@ -0,0 +1,118 @@
+package android
+
+import (
+	"os"
+	"path/filepath"
+	"reflect"
+	"testing"
+)
+
+func TestRequestResultsAfterInvokeBazel(t *testing.T) {
+	label := "//foo:bar"
+	arch := Arm64
+	bazelContext, _ := testBazelContext(t, map[bazelCommand]string{
+		bazelCommand{command: "cquery", expression: "kind(rule, deps(//:buildroot))"}: `@sourceroot//foo:bar|arm64>>out/foo/bar.txt`,
+	})
+	g, ok := bazelContext.GetOutputFiles(label, arch)
+	if ok {
+		t.Errorf("Did not expect cquery results prior to running InvokeBazel(), but got %s", g)
+	}
+	err := bazelContext.InvokeBazel()
+	if err != nil {
+		t.Fatalf("Did not expect error invoking Bazel, but got %s", err)
+	}
+	g, ok = bazelContext.GetOutputFiles(label, arch)
+	if !ok {
+		t.Errorf("Expected cquery results after running InvokeBazel(), but got none")
+	} else if w := []string{"out/foo/bar.txt"}; !reflect.DeepEqual(w, g) {
+		t.Errorf("Expected output %s, got %s", w, g)
+	}
+}
+
+func TestInvokeBazelWritesBazelFiles(t *testing.T) {
+	bazelContext, baseDir := testBazelContext(t, map[bazelCommand]string{})
+	err := bazelContext.InvokeBazel()
+	if err != nil {
+		t.Fatalf("Did not expect error invoking Bazel, but got %s", err)
+	}
+	if _, err := os.Stat(filepath.Join(baseDir, "bazel", "main.bzl")); os.IsNotExist(err) {
+		t.Errorf("Expected main.bzl to exist, but it does not")
+	} else if err != nil {
+		t.Errorf("Unexpected error stating main.bzl %s", err)
+	}
+
+	if _, err := os.Stat(filepath.Join(baseDir, "bazel", "BUILD.bazel")); os.IsNotExist(err) {
+		t.Errorf("Expected BUILD.bazel to exist, but it does not")
+	} else if err != nil {
+		t.Errorf("Unexpected error stating BUILD.bazel %s", err)
+	}
+
+	if _, err := os.Stat(filepath.Join(baseDir, "bazel", "WORKSPACE.bazel")); os.IsNotExist(err) {
+		t.Errorf("Expected WORKSPACE.bazel to exist, but it does not")
+	} else if err != nil {
+		t.Errorf("Unexpected error stating WORKSPACE.bazel %s", err)
+	}
+}
+
+func TestInvokeBazelPopulatesBuildStatements(t *testing.T) {
+	bazelContext, _ := testBazelContext(t, map[bazelCommand]string{
+		bazelCommand{command: "aquery", expression: "deps(//:buildroot)"}: `
+{
+  "artifacts": [{
+    "id": 1,
+    "pathFragmentId": 1
+  }, {
+    "id": 2,
+    "pathFragmentId": 2
+  }],
+  "actions": [{
+    "targetId": 1,
+    "actionKey": "x",
+    "mnemonic": "x",
+    "arguments": ["touch", "foo"],
+    "inputDepSetIds": [1],
+    "outputIds": [1],
+    "primaryOutputId": 1
+  }],
+  "depSetOfFiles": [{
+    "id": 1,
+    "directArtifactIds": [1, 2]
+  }],
+  "pathFragments": [{
+    "id": 1,
+    "label": "one"
+  }, {
+    "id": 2,
+    "label": "two"
+  }]
+}`,
+	})
+	err := bazelContext.InvokeBazel()
+	if err != nil {
+		t.Fatalf("Did not expect error invoking Bazel, but got %s", err)
+	}
+
+	got := bazelContext.BuildStatementsToRegister()
+	if want := 1; len(got) != want {
+		t.Errorf("Expected %d registered build statements, got %#v", want, got)
+	}
+}
+
+func testBazelContext(t *testing.T, bazelCommandResults map[bazelCommand]string) (*bazelContext, string) {
+	t.Helper()
+	p := bazelPaths{
+		buildDir:     t.TempDir(),
+		outputBase:   "outputbase",
+		workspaceDir: "workspace_dir",
+	}
+	aqueryCommand := bazelCommand{command: "aquery", expression: "deps(//:buildroot)"}
+	if _, exists := bazelCommandResults[aqueryCommand]; !exists {
+		bazelCommandResults[aqueryCommand] = "{}\n"
+	}
+	runner := &mockBazelRunner{bazelCommandResults: bazelCommandResults}
+	return &bazelContext{
+		bazelRunner: runner,
+		paths:       &p,
+		requests:    map[cqueryKey]bool{},
+	}, p.buildDir
+}