Add unit tests for assert() builtin
Change-Id: I3b34617ec39f6863627c9c7a23b45f5e8c2782c3
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/6564
Reviewed-by: Brett Wilson <brettw@chromium.org>
Commit-Queue: Brett Wilson <brettw@chromium.org>
diff --git a/src/gn/functions_unittest.cc b/src/gn/functions_unittest.cc
index ef5330e..1de8fdc 100644
--- a/src/gn/functions_unittest.cc
+++ b/src/gn/functions_unittest.cc
@@ -12,6 +12,66 @@
#include "gn/value.h"
#include "util/test/test.h"
+TEST(Functions, Assert) {
+ TestWithScope setup;
+
+ // Verify cases where the assertion passes.
+ std::vector<std::string> assert_pass_examples = {
+ R"gn(assert(true))gn",
+ R"gn(assert(true, "This message is ignored for passed assertions."))gn",
+ };
+ for (const auto& assert_pass_example : assert_pass_examples) {
+ TestParseInput input(assert_pass_example);
+ ASSERT_FALSE(input.has_error());
+ Err err;
+ input.parsed()->Execute(setup.scope(), &err);
+ ASSERT_FALSE(err.has_error()) << assert_pass_example;
+ }
+
+ // Verify case where the assertion fails, with no message.
+ {
+ TestParseInput input("assert(false)");
+ ASSERT_FALSE(input.has_error());
+ Err err;
+ input.parsed()->Execute(setup.scope(), &err);
+ ASSERT_TRUE(err.has_error());
+ ASSERT_EQ(err.message(), "Assertion failed.");
+ }
+
+ // Verify case where the assertion fails, with a message.
+ {
+ TestParseInput input("assert(false, \"What failed\")");
+ ASSERT_FALSE(input.has_error());
+ Err err;
+ input.parsed()->Execute(setup.scope(), &err);
+ ASSERT_TRUE(err.has_error());
+ ASSERT_EQ(err.message(), "Assertion failed.");
+ ASSERT_EQ(err.help_text(), "What failed");
+ }
+
+ // Verify usage errors are detected.
+ std::vector<std::string> bad_usage_examples = {
+ // Number of arguments.
+ R"gn(assert())gn",
+ R"gn(assert(1, 2, 3))gn",
+
+ // Argument types.
+ R"gn(assert(1))gn",
+ R"gn(assert("oops"))gn",
+ R"gn(assert(true, 1))gn",
+ R"gn(assert(true, []))gn",
+ };
+ for (const auto& bad_usage_example : bad_usage_examples) {
+ TestParseInput input(bad_usage_example);
+ ASSERT_FALSE(input.has_error());
+ Err err;
+ input.parsed()->Execute(setup.scope(), &err);
+ ASSERT_TRUE(err.has_error()) << bad_usage_example;
+ // We are checking for usage errors, not assertion failures.
+ ASSERT_NE(err.message(), "Assertion failed.") << bad_usage_example;
+ }
+}
+
TEST(Functions, Defined) {
TestWithScope setup;
