Add test to reproduce bug in error message.

soong config variable modules allow specifying a non-existent property,
which results in an unhelpful error message when the module type is then
used.

Bug: 171232169
Test: go test soong tests
Change-Id: I6174c0d35a28952157ee925f51d615e2ee735f8a

android/soong_config_modules_test.go

@@ -313,6 +313,51 @@ func TestSoongConfigModule(t *testing.T) {
 	})
 }
 
+func TestNonExistentPropertyInSoongConfigModule(t *testing.T) {
+	bp := `
+		soong_config_module_type {
+			name: "acme_test",
+			module_type: "test",
+			config_namespace: "acme",
+			bool_variables: ["feature1"],
+			properties: ["made_up_property"],
+		}
+
+		acme_test {
+			name: "foo",
+			cflags: ["-DGENERIC"],
+			soong_config_variables: {
+				feature1: {
+					made_up_property: true,
+				},
+			},
+		}
+    `
+
+	fixtureForVendorVars := func(vars map[string]map[string]string) FixturePreparer {
+		return FixtureModifyProductVariables(func(variables FixtureProductVariables) {
+			variables.VendorVars = vars
+		})
+	}
+
+	GroupFixturePreparers(
+		fixtureForVendorVars(map[string]map[string]string{"acme": {"feature1": "1"}}),
+		PrepareForTestWithDefaults,
+		FixtureRegisterWithContext(func(ctx RegistrationContext) {
+			ctx.RegisterModuleType("soong_config_module_type_import", soongConfigModuleTypeImportFactory)
+			ctx.RegisterModuleType("soong_config_module_type", soongConfigModuleTypeFactory)
+			ctx.RegisterModuleType("soong_config_string_variable", soongConfigStringVariableDummyFactory)
+			ctx.RegisterModuleType("soong_config_bool_variable", soongConfigBoolVariableDummyFactory)
+			ctx.RegisterModuleType("test_defaults", soongConfigTestDefaultsModuleFactory)
+			ctx.RegisterModuleType("test", soongConfigTestModuleFactory)
+		}),
+		FixtureWithRootAndroidBp(bp),
+	).ExtendWithErrorHandler(FixtureExpectsAllErrorsToMatchAPattern([]string{
+		// TODO(b/171232169): improve the error message for non-existent properties
+		`unrecognized property "soong_config_variables`,
+	})).RunTest(t)
+}
+
 func testConfigWithVendorVars(buildDir, bp string, fs map[string][]byte, vendorVars map[string]map[string]string) Config {
 	config := TestConfig(buildDir, nil, bp, fs)