| // Copyright 2020 The Pigweed Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| // use this file except in compliance with the License. You may obtain a copy of |
| // the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| // License for the specific language governing permissions and limitations under |
| // the License. |
| #pragma once |
| |
| namespace pw { |
| namespace unit_test { |
| |
| // This file defines the interface through which the pw_unit_test framework |
| // sends its test data as it runs unit tests. A program wanting to process test |
| // events must define a class implementing the EventHandler interface and |
| // register it with the framework. When RUN_ALL_TESTS() is called, pw_unit_test |
| // will notify the handler of various events which occur in the test process. |
| // |
| // For example, consider a file containing the following test definitions: |
| // |
| // TEST(MyTestSuite, MyFirstCase) { |
| // EXPECT_TRUE(true); |
| // } |
| // |
| // TEST(MyTestSuite, MySecondCase) { |
| // EXPECT_TRUE(false); |
| // } |
| // |
| // In this file, there is one test suite consisting of two test cases. |
| // |
| // When pw_unit_test starts running the first test case, it dispatches a |
| // TestCaseStart event to the event handler. It then runs the body of the test, |
| // sequentially checking each assertion within. After each assertion, a |
| // TestCaseExpect event is sent to the event handler with the assertion's |
| // result. In this case, there is only one, which passes successfully (as |
| // `true`, is in fact, true). Finally, after the test is finished, a TestCaseEnd |
| // event is dispatched with the overall result of the test case. |
| // |
| // pw_unit_test then runs MySecondCase, still within the same test suite. The |
| // sequence of events dispatched is the same, except that this TestCaseExpect |
| // event is marked as a failure. The result passed alongside the TestCaseEnd |
| // event also indicates that the test case did not complete successfully. |
| |
| // The result of a complete test run. |
| enum class TestResult { |
| kSuccess = 0, |
| kFailure = 1, |
| }; |
| |
| struct TestCase { |
| // Name of the test suite to which this test case belongs. |
| const char* suite_name; |
| |
| // Name of the test case. |
| const char* test_name; |
| |
| // Path to the file in which the test case is defined. |
| const char* file_name; |
| }; |
| |
| struct TestExpectation { |
| // The source code for the expression which was run. |
| const char* expression; |
| |
| // The expression with arguments evaluated. |
| const char* evaluated_expression; |
| |
| // Line number at which the expectation is located. |
| int line_number; |
| |
| // Whether the expectation succeeded. |
| bool success; |
| }; |
| |
| struct RunTestsSummary { |
| // The number of passed tests among the run tests. |
| int passed_tests; |
| |
| // The number of passed tests among the run tests. |
| int failed_tests; |
| }; |
| |
| // An event handler is responsible for collecting and processing the results of |
| // a unit test run. Its interface is called by the unit test framework as tests |
| // are executed and various test events occur. |
| class EventHandler { |
| public: |
| virtual ~EventHandler() = default; |
| |
| // Called before all tests are run. |
| virtual void RunAllTestsStart() = 0; |
| |
| // Called after all tests are run. |
| virtual void RunAllTestsEnd(const RunTestsSummary& run_tests_summary) = 0; |
| |
| // Called when a new test case is started. |
| virtual void TestCaseStart(const TestCase& test_case) = 0; |
| |
| // Called when a test case completes. The overall result of the test case is |
| // provided. |
| virtual void TestCaseEnd(const TestCase& test_case, TestResult result) = 0; |
| |
| // Called when a disabled test case is encountered. |
| virtual void TestCaseDisabled(const TestCase&) {} |
| |
| // Called after each expect/assert statement within a test case with the |
| // result of the expectation. |
| virtual void TestCaseExpect(const TestCase& test_case, |
| const TestExpectation& expectation) = 0; |
| }; |
| |
| // Sets the event handler for a test run. Must be called before RUN_ALL_TESTS() |
| // to receive test output. |
| void RegisterEventHandler(EventHandler* event_handler); |
| |
| } // namespace unit_test |
| } // namespace pw |