Add additional test for UpdateFromText()
Add test demonstrating that UpdateFromText() only updates fields provided in the text format.
diff --git a/compiler/back_end/cpp/testcode/text_format_test.cc b/compiler/back_end/cpp/testcode/text_format_test.cc
index 7b78b56..7db6dc8 100644
--- a/compiler/back_end/cpp/testcode/text_format_test.cc
+++ b/compiler/back_end/cpp/testcode/text_format_test.cc
@@ -75,6 +75,23 @@
"}",
::emboss::WriteToString(view.b(), ::emboss::MultilineText()));
}
+
+TEST(TextFormat, UpdateFromText) {
+ ::std::array<char, 2> values{};
+ const auto view = MakeVanillaView(&values);
+
+ ::emboss::UpdateFromText(view, "{ a: 1, b: 2 }");
+ EXPECT_EQ(view.a().Read(), 1);
+ EXPECT_EQ(view.b().Read(), 2);
+
+ ::emboss::UpdateFromText(view, "{ a: 3 }");
+ EXPECT_EQ(view.a().Read(), 3);
+ EXPECT_EQ(view.b().Read(), 2);
+
+ ::emboss::UpdateFromText(view, "{ b: 4 }");
+ EXPECT_EQ(view.a().Read(), 3);
+ EXPECT_EQ(view.b().Read(), 4);
+}
} // namespace
} // namespace test
