Add assert_true! and assert_false! macros to gtest_rust

These macros provide fatal assertions, panicking if the condition is not met. This aligns with the assertion a developer would expect from other test frameworks.

The macros are added to `assertions.rs` and exported in `lib.rs`.

Integration tests are added to:
- `passing_tests.rs`: Ensure the macros don't panic when the condition is met.
- `failing_tests.rs`: Ensure the macros *do* panic when the condition is not met.
- `integration_tests.sh`: Updated to expect the new failures in `failing_tests_bin`.

PUBLIC: Add assert_true! and assert_false! macros for fatal assertions.
PiperOrigin-RevId: 913525450

Author: Googler

googletest/src/assertions.rs

@@ -524,6 +524,66 @@ macro_rules! expect_true {
 }
 pub use expect_true;
 
+/// Marks the test as failed and panics if the given value is `false`.
+///
+/// This is a *fatal* assertion: the test panics
+/// in the event of assertion failure.
+///
+/// This can only be invoked inside tests with the
+/// [`gtest`][crate::gtest] attribute. The assertion must
+/// occur in the same thread as that running the test itself.
+///
+/// Example:
+///
+/// ```ignore
+/// use googletest::prelude::*;
+///
+/// #[gtest]
+/// fn should_fail() {
+///     assert_true!(false); // panic!
+/// }
+/// ```
+///
+/// One may optionally add arguments which will be formatted and appended to a
+/// failure message. For example:
+///
+/// ```ignore
+/// use googletest::prelude::*;
+///
+/// #[gtest]
+/// fn should_fail() {
+///     let extra_information = "Some additional information";
+///     assert_true!(false, "Test failed. Extra information: {extra_information}.");
+/// }
+/// ```
+///
+/// The output is as follows:
+///
+/// ```text
+/// Value of: false
+/// Expected: is equal to true
+/// Actual: false,
+///   which isn't equal to true
+/// Test failed. Extra information: Some additional information.
+/// ```
+#[macro_export]
+macro_rules! assert_true {
+    ($condition:expr) => {
+        if let Err(e) = $crate::verify_true!($condition) {
+            panic!("\n{}", e);
+        }
+    };
+    ($condition:expr, $($format_args:expr),* $(,)?) => {
+        if let Err(e) = $crate::GoogleTestSupport::with_failure_message(
+            $crate::verify_true!($condition),
+            || format!($($format_args),*))
+        {
+            panic!("\n{}", e);
+        }
+    };
+}
+pub use assert_true;
+
 /// Verify if the condition evaluates to false and returns `Result`.
 ///
 /// Evaluates to `Result::Ok(())` if the condition is false and
@@ -613,6 +673,65 @@ macro_rules! expect_false {
 }
 pub use expect_false;
 
+/// Marks the test as failed and panics if the given value is `true`.
+///
+/// This is a *fatal* assertion: the test panics
+/// in the event of assertion failure.
+///
+/// This can only be invoked inside tests with the
+/// [`gtest`][crate::gtest] attribute. The assertion must
+/// occur in the same thread as that running the test itself.
+///
+/// Example:
+/// ```ignore
+/// use googletest::prelude::*;
+///
+/// #[gtest]
+/// fn should_fail() {
+///     assert_false!(true); // panic!
+/// }
+/// ```
+///
+/// One may optionally add arguments which will be formatted and appended to a
+/// failure message. For example:
+///
+/// ``` ignore
+/// use googletest::prelude::*;
+///
+/// #[gtest]
+/// fn should_fail() {
+///     let extra_information = "Some additional information";
+///     assert_false!(true, "Test failed. Extra information: {extra_information}.");
+/// }
+/// ```
+///
+/// The output is as follows:
+///
+/// ```text
+/// Value of: true
+/// Expected: is equal to false
+/// Actual: true,
+///   which isn't equal to false
+/// Test failed. Extra information: Some additional information.
+/// ```
+#[macro_export]
+macro_rules! assert_false {
+    ($condition:expr) => {
+        if let Err(e) = $crate::verify_false!($condition) {
+            panic!("\n{}", e);
+        }
+    };
+    ($condition:expr, $($format_args:expr),* $(,)?) => {
+        if let Err(e) = $crate::GoogleTestSupport::with_failure_message(
+            $crate::verify_false!($condition),
+            || format!($($format_args),*))
+        {
+            panic!("\n{}", e);
+        }
+    };
+}
+pub use assert_false;
+
 /// Checks whether the second argument is equal to the first argument.
 ///
 /// Evaluates to `Result::Ok(())` if they are equal and

googletest/src/lib.rs

@@ -57,11 +57,11 @@ pub mod prelude {
     pub use super::Result;
     // Assert macros
     pub use super::{
-        add_failure, add_failure_at, assert_pred, assert_that, expect_eq, expect_false,
-        expect_float_eq, expect_ge, expect_gt, expect_le, expect_lt, expect_ne, expect_near,
-        expect_pred, expect_that, expect_true, fail, succeed, verify_eq, verify_false,
-        verify_float_eq, verify_ge, verify_gt, verify_le, verify_lt, verify_ne, verify_near,
-        verify_pred, verify_that, verify_true,
+        add_failure, add_failure_at, assert_false, assert_pred, assert_that, assert_true,
+        expect_eq, expect_false, expect_float_eq, expect_ge, expect_gt, expect_le, expect_lt,
+        expect_ne, expect_near, expect_pred, expect_that, expect_true, fail, succeed, verify_eq,
+        verify_false, verify_float_eq, verify_ge, verify_gt, verify_le, verify_lt, verify_ne,
+        verify_near, verify_pred, verify_that, verify_true,
     };
 }