Implement bp2build converter for rust_proc_macro

Test: WIP
Bug: 297356482
Change-Id: I17d1a0a95d4a67ccbc9b2d74e49bcacd6ff4d26b
diff --git a/bp2build/rust_proc_macro_conversion_test.go b/bp2build/rust_proc_macro_conversion_test.go
new file mode 100644
index 0000000..82e080d
--- /dev/null
+++ b/bp2build/rust_proc_macro_conversion_test.go
@@ -0,0 +1,62 @@
+package bp2build
+
+import (
+	"android/soong/android"
+	"android/soong/rust"
+	"testing"
+)
+
+func rustRustProcMacroTestCase(t *testing.T, tc Bp2buildTestCase) {
+	t.Helper()
+	RunBp2BuildTestCase(t, registerRustProcMacroModuleTypes, tc)
+}
+
+func registerRustProcMacroModuleTypes(ctx android.RegistrationContext) {
+	ctx.RegisterModuleType("rust_library_host", rust.RustLibraryHostFactory)
+	ctx.RegisterModuleType("rust_proc_macro", rust.ProcMacroFactory)
+}
+
+func TestRustProcMacroLibrary(t *testing.T) {
+	runRustLibraryTestCase(t, Bp2buildTestCase{
+		Dir:       "external/rust/crates/foo",
+		Blueprint: "",
+		Filesystem: map[string]string{
+			"external/rust/crates/foo/src/lib.rs":    "",
+			"external/rust/crates/foo/src/helper.rs": "",
+			"external/rust/crates/foo/Android.bp": `
+rust_proc_macro {
+	name: "libfoo",
+	crate_name: "foo",
+	srcs: ["src/lib.rs"],
+	edition: "2021",
+	features: ["bah-enabled"],
+	cfgs: ["baz"],
+	rustlibs: ["libbar"],
+    bazel_module: { bp2build_available: true },
+}
+`,
+			"external/rust/crates/bar/src/lib.rs": "",
+			"external/rust/crates/bar/Android.bp": `
+rust_library_host {
+    name: "libbar",
+    crate_name: "bar",
+    srcs: ["src/lib.rs"],
+    bazel_module: { bp2build_available: true },
+}`,
+		},
+		ExpectedBazelTargets: []string{
+			makeBazelTargetHostOrDevice("rust_proc_macro", "libfoo", AttrNameToString{
+				"crate_name": `"foo"`,
+				"srcs": `[
+        "src/helper.rs",
+        "src/lib.rs",
+    ]`,
+				"crate_features": `["bah-enabled"]`,
+				"edition":        `"2021"`,
+				"rustc_flags":    `["--cfg=baz"]`,
+				"deps":           `["//external/rust/crates/bar:libbar"]`,
+			}, android.HostSupported),
+		},
+	},
+	)
+}