For test apexes, base_apex_name is the api domain

apex_test do not "override" the source apexes that they test. However,
similar to override_apexes, test apexes have the same path
(/apex/<apex_name>) on device. Instead of creating another property,
reuse the existing base_apex_name property. The use case for this will
be for creating selection statements for stub/impl selection.

Test: go test ./bp2build
Change-Id: I4b7548e0e0fc920e407e1c5e5c00e87efc6e70c9

3 files changed, 14 insertions, 7 deletions

diff --git a/apex/apex.go b/apex/apex.go
index 69547c3b7..e01406bc6 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -3703,6 +3703,8 @@ func convertWithBp2build(a *apexBundle, ctx android.TopDownMutatorContext) (baze
 	commonAttrs := android.CommonAttributes{}
 	if a.testApex {
 		commonAttrs.Testonly = proptools.BoolPtr(true)
+		// Set the api_domain of the test apex
+		attrs.Base_apex_name = proptools.StringPtr(cc.GetApiDomain(a.Name()))
 	}
 
 	return attrs, props, commonAttrs
diff --git a/bp2build/apex_conversion_test.go b/bp2build/apex_conversion_test.go
index 1cc3f22ed..390cabe1f 100644
--- a/bp2build/apex_conversion_test.go
+++ b/bp2build/apex_conversion_test.go
@@ -1475,10 +1475,11 @@ apex_test {
 `,
 		ExpectedBazelTargets: []string{
 			MakeBazelTarget("apex", "test_com.android.apogee", AttrNameToString{
-				"file_contexts": `"file_contexts_file"`,
-				"manifest":      `"apex_manifest.json"`,
-				"testonly":      `True`,
-				"tests":         `[":cc_test_1"]`,
+				"file_contexts":  `"file_contexts_file"`,
+				"base_apex_name": `"com.android.apogee"`,
+				"manifest":       `"apex_manifest.json"`,
+				"testonly":       `True`,
+				"tests":          `[":cc_test_1"]`,
 			}),
 		}})
 }
diff --git a/cc/bp2build.go b/cc/bp2build.go
index 6e91bffa2..ca8d60902 100644
--- a/cc/bp2build.go
+++ b/cc/bp2build.go
@@ -1210,7 +1210,11 @@ var (
 	}
 )
 
-func getApiDomain(apexName string) string {
+// GetApiDomain returns the canonical name of the apex. This is synonymous to the apex_name definition.
+// https://cs.android.com/android/_/android/platform/build/soong/+/e3f0281b8897da1fe23b2f4f3a05f1dc87bcc902:apex/prebuilt.go;l=81-83;drc=2dc7244af985a6ad701b22f1271e606cabba527f;bpv=1;bpt=0
+// For test apexes, it uses a naming convention heuristic to determine the api domain.
+// TODO (b/281548611): Move this build/soong/android
+func GetApiDomain(apexName string) string {
 	if apiDomain, exists := testApexNameToApiDomain[apexName]; exists {
 		return apiDomain
 	}
@@ -1233,7 +1237,7 @@ func createInApexConfigSetting(ctx android.TopDownMutatorContext, apexName strin
 	defer apiDomainConfigSettingLock.Unlock()
 
 	// Return if a config_setting has already been created
-	apiDomain := getApiDomain(apexName)
+	apiDomain := GetApiDomain(apexName)
 	acsm := getApiDomainConfigSettingMap(ctx.Config())
 	if _, exists := (*acsm)[apiDomain]; exists {
 		return
@@ -1270,7 +1274,7 @@ func inApexConfigSetting(apexAvailable string) string {
 	if apexAvailable == android.AvailableToAnyApex {
 		return bazel.AndroidAndInApex
 	}
-	apiDomain := getApiDomain(apexAvailable)
+	apiDomain := GetApiDomain(apexAvailable)
 	return "//build/bazel/rules/apex:" + apiDomain
 }