[driver] Add test for new behaviour in createCompilerInvocation

Test for "ForceNoOutputs" flag.

Author: benlangmuir

test/Driver/createCompilerInvocation.swift

@@ -7,3 +7,29 @@
 
 // CHECK-FAIL: error: unable to create a CompilerInvocation
 // CHECK-NOWARN-NOT: warning
+
+// RUN: %swift-ide-test_plain -test-createCompilerInvocation -module-name foo -emit-module -emit-module-path %t/foo.swiftmodule -emit-objc-header -emit-objc-header-path %t/foo.h -enable-library-evolution -emit-module-interface -emit-module-interface-path %t/foo.swiftinterface -emit-library %s 2>&1 | %FileCheck %s --check-prefix=NORMAL_ARGS --implicit-check-not="error: "
+// NORMAL_ARGS: Frontend Arguments BEGIN
+// NORMAL_ARGS-DAG: -o{{$}}
+// NORMAL_ARGS-DAG: foo-{{[a-z0-9]+}}.o
+// NORMAL_ARGS-DAG: -c{{$}}
+// NORMAL_ARGS-DAG: -module-name
+// NORMAL_ARGS-DAG: -emit-module-path
+// NORMAL_ARGS-DAG: -emit-module-doc-path
+// NORMAL_ARGS-DAG: -emit-module-source-info-path
+// NORMAL_ARGS-DAG: -emit-module-interface-path
+// NORMAL_ARGS-DAG: -emit-objc-header-path
+// NORMAL_ARGS: Frontend Arguments END
+
+// RUN: %swift-ide-test_plain -test-createCompilerInvocation -force-no-outputs -module-name foo -emit-module -emit-module-path %t/foo.swiftmodule -emit-objc-header -emit-objc-header-path %t/foo.h -enable-library-evolution -emit-module-interface -emit-module-interface-path %t/foo.swiftinterface -emit-library %s 2>&1 > %t.nooutput_args
+// RUN: %FileCheck %s --check-prefix=NOOUTPUT_ARGS --implicit-check-not="error: " < %t.nooutput_args
+// RUN: %FileCheck %s --check-prefix=NOOUTPUT_ARGS_NEG --implicit-check-not="error: " < %t.nooutput_args
+// NOOUTPUT_ARGS_NEG-NOT: -o{{$}}
+// NOOUTPUT_ARGS_NEG-NOT: foo-{{[a-z0-9]+}}.o
+// NOOUTPUT_ARGS_NEG-NOT: -o{{$}}
+// NOOUTPUT_ARGS_NEG-NOT: -emit
+
+// NOOUTPUT_ARGS: Frontend Arguments BEGIN
+// NOOUTPUT_ARGS-DAG: -typecheck
+// NOOUTPUT_ARGS-DAG: -module-name
+// NOOUTPUT_ARGS: Frontend Arguments END

tools/swift-ide-test/swift-ide-test.cpp

@@ -3223,7 +3223,7 @@ static int doPrintUSRs(const CompilerInvocation &InitInvok,
   return 0;
 }
 
-static int doTestCreateCompilerInvocation(ArrayRef<const char *> Args) {
+static int doTestCreateCompilerInvocation(ArrayRef<const char *> Args, bool ForceNoOutputs) {
   PrintingDiagnosticConsumer PDC;
   SourceManager SM;
   DiagnosticEngine Diags(SM);
@@ -3232,8 +3232,13 @@ static int doTestCreateCompilerInvocation(ArrayRef<const char *> Args) {
   CompilerInvocation CI;
   bool HadError = driver::getSingleFrontendInvocationFromDriverArguments(
       Args, Diags, [&](ArrayRef<const char *> FrontendArgs) {
+    llvm::outs() << "Frontend Arguments BEGIN\n";
+    for (const char *arg : FrontendArgs) {
+      llvm::outs() << arg << "\n";
+    }
+    llvm::outs() << "Frontend Arguments END\n";
     return CI.parseArgs(FrontendArgs, Diags);
-  });
+  }, ForceNoOutputs);
 
   if (HadError) {
     llvm::errs() << "error: unable to create a CompilerInvocation\n";
@@ -3271,8 +3276,13 @@ int main(int argc, char *argv[]) {
     // llvm::cl::ParseCommandLineOptions.
     StringRef FirstArg(argv[1]);
     if (FirstArg == "-test-createCompilerInvocation") {
+      bool ForceNoOutputs = false;
       ArrayRef<const char *> Args(argv + 2, argc - 2);
-      return doTestCreateCompilerInvocation(Args);
+      if (argc > 2 && StringRef(argv[2]) == "-force-no-outputs") {
+        ForceNoOutputs = true;
+        Args = Args.drop_front();
+      }
+      return doTestCreateCompilerInvocation(Args, ForceNoOutputs);
     }
   }