router check tool: add flag for only printing failed tests

docs/root/install/tools/route_table_check_tool.rst

@@ -37,6 +37,9 @@ Usage
     -d,  --details
       Show detailed test execution results. The first line indicates the test name.
 
+    --only-show-failures
+      Displays test results for failed tests. Omits test names for passing tests if the details flag is set.
+
     -p,  --useproto
       Use Proto test file schema
 

docs/root/intro/version_history.rst

@@ -48,6 +48,7 @@ Version history
 * router check tool: add coverage reporting & enforcement.
 * router check tool: add comprehensive coverage reporting.
 * router check tool: add deprecated field check.
+* router check tool: add flag for only printing results of failed tests.
 * thrift_proxy: fix crashing bug on invalid transport/protocol framing
 * tls: added verification of IP address SAN fields in certificates against configured SANs in the
 * tracing: added support to the Zipkin reporter for sending list of spans as Zipkin JSON v2 and protobuf message over HTTP.

test/tools/router_check/router.cc

@@ -183,9 +183,7 @@ bool RouterCheckTool::compareEntries(const std::string& expected_routes) {
     tool_config.route_ = config_->route(*tool_config.headers_, tool_config.random_value_);
 
     const std::string& test_name = check_config.test_name();
-    if (details_) {
-      std::cout << test_name << std::endl;
-    }
+    tests_.push_back(std::pair<std::string, std::vector<std::string>>(test_name, {}));
     const envoy::RouterCheckToolSchema::ValidationAssert& validate = check_config.validate();
 
     using checkerFunc =
@@ -208,6 +206,18 @@ bool RouterCheckTool::compareEntries(const std::string& expected_routes) {
       }
     }
   }
+  // Output failure details to stdout if details_ flag is set to true
+  for (const auto& test_result : tests_) {
+    // All test names are printed if the details_ flag is true unless only_show_failures_ is also
+    // true.
+    if ((details_ && !only_show_failures_) ||
+        (only_show_failures_ && !test_result.second.empty())) {
+      std::cout << test_result.first << std::endl;
+      for (const auto& failure : test_result.second) {
+        std::cerr << failure << std::endl;
+      }
+    }
+  }
 
   return no_failures;
 }
@@ -425,11 +435,8 @@ bool RouterCheckTool::compareResults(const std::string& actual, const std::strin
     return true;
   }
 
-  // Output failure details to stdout if details_ flag is set to true
-  if (details_) {
-    std::cerr << "expected: [" << expected << "], actual: [" << actual
-              << "], test type: " << test_type << std::endl;
-  }
+  tests_.back().second.push_back("expected: [" + expected + "], actual: [" + actual +
+                                 "], test type: " + test_type);
   return false;
 }
 
@@ -446,6 +453,8 @@ Options::Options(int argc, char** argv) {
   TCLAP::CmdLine cmd("router_check_tool", ' ', "none", true);
   TCLAP::SwitchArg is_proto("p", "useproto", "Use Proto test file schema", cmd, false);
   TCLAP::SwitchArg is_detailed("d", "details", "Show detailed test execution results", cmd, false);
+  TCLAP::SwitchArg only_show_failures("", "only-show-failures", "Only display failing tests", cmd,
+                                      false);
   TCLAP::SwitchArg disable_deprecation_check("", "disable-deprecation-check",
                                              "Disable deprecated fields check", cmd, false);
   TCLAP::ValueArg<double> fail_under("f", "fail-under",
@@ -468,6 +477,7 @@ Options::Options(int argc, char** argv) {
 
   is_proto_ = is_proto.getValue();
   is_detailed_ = is_detailed.getValue();
+  only_show_failures_ = only_show_failures.getValue();
   fail_under_ = fail_under.getValue();
   comprehensive_coverage_ = comprehensive_coverage.getValue();
   disable_deprecation_check_ = disable_deprecation_check.getValue();

test/tools/router_check/router.h

@@ -91,6 +91,11 @@ class RouterCheckTool : Logger::Loggable<Logger::Id::testing> {
    */
   void setShowDetails() { details_ = true; }
 
+  /**
+   * Set whether to only print failing match cases.
+   */
+  void setOnlyShowFailures() { only_show_failures_ = true; }
+
   float coverage(bool detailed) {
     return detailed ? coverage_.detailedReport() : coverage_.report();
   }
@@ -144,6 +149,10 @@ class RouterCheckTool : Logger::Loggable<Logger::Id::testing> {
 
   bool details_{false};
 
+  bool only_show_failures_{false};
+
+  std::vector<std::pair<std::string, std::vector<std::string>>> tests_;
+
   // TODO(hennna): Switch away from mocks following work done by @rlazarus in github issue #499.
   std::unique_ptr<NiceMock<Server::Configuration::MockFactoryContext>> factory_context_;
   std::unique_ptr<Router::ConfigImpl> config_;
@@ -196,10 +205,15 @@ class Options {
   bool isProto() const { return is_proto_; }
 
   /**
-   * @return true is detailed test execution results are displayed.
+   * @return true if detailed test execution results are displayed.
    */
   bool isDetailed() const { return is_detailed_; }
 
+  /**
+   * @return true if only test failures are displayed.
+   */
+  bool onlyShowFailures() const { return only_show_failures_; }
+
   /**
    * @return true if the deprecated field check for RouteConfiguration is disabled.
    */
@@ -214,6 +228,7 @@ class Options {
   bool comprehensive_coverage_;
   bool is_proto_;
   bool is_detailed_;
+  bool only_show_failures_;
   bool disable_deprecation_check_;
 };
 } // namespace Envoy

test/tools/router_check/router_check.cc

@@ -18,6 +18,10 @@ int main(int argc, char* argv[]) {
       checktool.setShowDetails();
     }
 
+    if (options.onlyShowFailures()) {
+      checktool.setOnlyShowFailures();
+    }
+
     bool is_equal = options.isProto()
                         ? checktool.compareEntries(options.testPath())
                         : checktool.compareEntriesInJson(options.unlabelledTestPath());

test/tools/router_check/test/route_tests.sh

@@ -64,9 +64,23 @@ if [[ "${BAD_CONFIG_OUTPUT}" != *"Unable to parse"* ]]; then
   exit 1
 fi
 
-# Failure test case
-echo "testing failure test case"
-FAILURE_OUTPUT=$("${PATH_BIN}" "${PATH_CONFIG}/TestRoutes.yaml" "${PATH_CONFIG}/Weighted.golden.json" "--details" 2>&1) ||
+# Failure output flag test cases
+echo "testing failure test cases"
+# Failure test case with only details flag set
+FAILURE_OUTPUT=$("${PATH_BIN}" "-c" "${PATH_CONFIG}/TestRoutes.yaml" "-t" "${PATH_CONFIG}/Weighted.golden.proto.json" "--details" "--useproto" 2>&1) ||
+if [[ "${FAILURE_OUTPUT}" != *"Test_1"*"Test_2"*"expected: [cluster1], actual: [instant-server], test type: cluster_name"* ]]; then
+  exit 1
+fi
+
+# Failure test case with details flag set and failures flag set
+FAILURE_OUTPUT=$("${PATH_BIN}" "-c" "${PATH_CONFIG}/TestRoutes.yaml" "-t" "${PATH_CONFIG}/Weighted.golden.proto.json" "--details"  "--only-show-failures" "--useproto" 2>&1) ||
+  echo "${FAILURE_OUTPUT:-no-output}"
+if [[ "${FAILURE_OUTPUT}" != *"expected: [cluster1], actual: [instant-server], test type: cluster_name"* ]]; then
+  exit 1
+fi
+
+# Failure test case with details flag unset and failures flag set
+FAILURE_OUTPUT=$("${PATH_BIN}" "-c" "${PATH_CONFIG}/TestRoutes.yaml" "-t" "${PATH_CONFIG}/Weighted.golden.proto.json" "--only-show-failures" "--useproto" 2>&1) ||
   echo "${FAILURE_OUTPUT:-no-output}"
 if [[ "${FAILURE_OUTPUT}" != *"expected: [cluster1], actual: [instant-server], test type: cluster_name"* ]]; then
   exit 1