Add simple bp2build converter for java_test_host

Bug:281551424

Test: java_test_host_conversion_test.go and presubmits
Change-Id: I43ed26df0bacd63ef402de4d9733d19604005c35
diff --git a/bp2build/java_test_host_conversion_test.go b/bp2build/java_test_host_conversion_test.go
new file mode 100644
index 0000000..f411ffb
--- /dev/null
+++ b/bp2build/java_test_host_conversion_test.go
@@ -0,0 +1,149 @@
+// Copyright 2023 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 bp2build
+
+import (
+	"testing"
+
+	"android/soong/android"
+	"android/soong/java"
+)
+
+func runJavaTestHostTestCase(t *testing.T, tc Bp2buildTestCase) {
+	t.Helper()
+	(&tc).ModuleTypeUnderTest = "java_test_host"
+	(&tc).ModuleTypeUnderTestFactory = java.TestHostFactory
+	RunBp2BuildTestCase(t, func(ctx android.RegistrationContext) {
+		ctx.RegisterModuleType("java_library", java.LibraryFactory)
+	}, tc)
+}
+
+func TestJavaTestHostGeneral(t *testing.T) {
+	runJavaTestHostTestCase(t, Bp2buildTestCase{
+		Description: "java_test_host general",
+		Filesystem:  map[string]string{},
+		Blueprint: `
+java_test_host {
+    name: "java_test_host-1",
+    srcs: ["a.java", "b.java"],
+    libs: ["lib_a"],
+    static_libs: ["static_libs_a"],
+    exclude_srcs: ["b.java"],
+    javacflags: ["-Xdoclint:all/protected"],
+    java_version: "8",
+}
+
+java_library {
+    name: "lib_a",
+    bazel_module: { bp2build_available: false },
+}
+
+java_library {
+    name: "static_libs_a",
+    bazel_module: { bp2build_available: false },
+}
+`,
+		ExpectedBazelTargets: []string{
+			MakeBazelTarget("java_library", "java_test_host-1_lib", AttrNameToString{
+				"deps": `[
+        ":lib_a-neverlink",
+        ":static_libs_a",
+    ]`,
+				"java_version": `"8"`,
+				"javacopts":    `["-Xdoclint:all/protected"]`,
+				"srcs":         `["a.java"]`,
+				"target_compatible_with": `select({
+        "//build/bazel/platforms/os:android": ["@platforms//:incompatible"],
+        "//conditions:default": [],
+    })`,
+			}),
+			MakeBazelTarget("java_test", "java_test_host-1", AttrNameToString{
+				"runtime_deps": `[":java_test_host-1_lib"]`,
+				"target_compatible_with": `select({
+        "//build/bazel/platforms/os:android": ["@platforms//:incompatible"],
+        "//conditions:default": [],
+    })`,
+			}),
+		},
+	})
+}
+
+func TestJavaTestHostNoSrcs(t *testing.T) {
+	runJavaTestHostTestCase(t, Bp2buildTestCase{
+		Description: "java_test_host without srcs",
+		Filesystem:  map[string]string{},
+		Blueprint: `
+java_test_host {
+    name: "java_test_host-1",
+    libs: ["lib_a"],
+    static_libs: ["static_libs_a"],
+}
+
+java_library {
+    name: "lib_a",
+    bazel_module: { bp2build_available: false },
+}
+
+java_library {
+    name: "static_libs_a",
+    bazel_module: { bp2build_available: false },
+}
+`,
+		ExpectedBazelTargets: []string{
+			MakeBazelTarget("java_test", "java_test_host-1", AttrNameToString{
+				"runtime_deps": `[
+        ":lib_a-neverlink",
+        ":static_libs_a",
+    ]`,
+				"target_compatible_with": `select({
+        "//build/bazel/platforms/os:android": ["@platforms//:incompatible"],
+        "//conditions:default": [],
+    })`,
+			}),
+		},
+	})
+}
+
+func TestJavaTestHostKotlinSrcs(t *testing.T) {
+	runJavaTestHostTestCase(t, Bp2buildTestCase{
+		Description: "java_test_host with .kt in srcs",
+		Filesystem:  map[string]string{},
+		Blueprint: `
+java_test_host {
+    name: "java_test_host-1",
+    srcs: ["a.java", "b.kt"],
+}
+`,
+		ExpectedBazelTargets: []string{
+			MakeBazelTarget("java_test", "java_test_host-1", AttrNameToString{
+				"runtime_deps": `[":java_test_host-1_lib"]`,
+				"target_compatible_with": `select({
+        "//build/bazel/platforms/os:android": ["@platforms//:incompatible"],
+        "//conditions:default": [],
+    })`,
+			}),
+			MakeBazelTarget("kt_jvm_library", "java_test_host-1_lib", AttrNameToString{
+				"srcs": `[
+        "a.java",
+        "b.kt",
+    ]`,
+				"target_compatible_with": `select({
+        "//build/bazel/platforms/os:android": ["@platforms//:incompatible"],
+        "//conditions:default": [],
+    })`,
+			}),
+		},
+	})
+}