[ModuleInterface] Add tests for warning-suppression, errors from sub-instance.

Author: graydon

test/ParseableInterface/ModuleCache/module-cache-diagnostics.swift

@@ -0,0 +1,74 @@
+// RUN: %empty-directory(%t)
+// RUN: %empty-directory(%t/modulecache)
+//
+// Setup builds a module TestModule that depends on OtherModule and LeafModule (built from other.swift and leaf.swift).
+// During setup, input and intermediate mtimes are all set to a constant 'old' time (long in the past).
+//
+// We then revert LeafModule.swiftinterface to have a warning-provoking entry in it, and check that we get no diagnostic.
+//
+// We then modify LeafModule.swiftinterface to have an error in it, and check that we get a diagnostic and failure.
+//
+//
+// Setup phase 1: Write input files.
+//
+// RUN: echo 'public func LeafFunc() -> Int { return 10; }' >%t/leaf.swift
+//
+// RUN: echo 'import LeafModule' >%t/other.swift
+// RUN: echo 'public func OtherFunc() -> Int { return LeafFunc(); }' >>%t/other.swift
+//
+//
+// Setup phase 2: build modules, pushing timestamps of inputs and intermediates into the past as we go.
+//
+// RUN: %S/Inputs/make-old.py %t/leaf.swift %t/other.swift
+// RUN: %target-swift-frontend -I %t -emit-parseable-module-interface-path %t/LeafModule.swiftinterface -module-name LeafModule %t/leaf.swift -emit-module -o /dev/null
+// RUN: %S/Inputs/make-old.py %t/LeafModule.swiftinterface
+// RUN: %target-swift-frontend -I %t -module-cache-path %t/modulecache -enable-parseable-module-interface -emit-parseable-module-interface-path %t/OtherModule.swiftinterface -module-name OtherModule %t/other.swift -emit-module -o /dev/null
+// RUN: %S/Inputs/make-old.py %t/modulecache/LeafModule-*.swiftmodule %t/OtherModule.swiftinterface
+// RUN: %target-swift-frontend -I %t -module-cache-path %t/modulecache -enable-parseable-module-interface -emit-module -o %t/TestModule.swiftmodule -module-name TestModule %s
+// RUN: %S/Inputs/make-old.py %t/modulecache/OtherModule-*.swiftmodule
+//
+//
+// Actual test: add an inlinable func with an unused var to LeafModule.swiftinterface (which should emit a warning); check we do get a rebuild, but no warning.
+//
+// RUN: %S/Inputs/check-is-old.py %t/OtherModule.swiftinterface %t/LeafModule.swiftinterface
+// RUN: %S/Inputs/check-is-old.py %t/modulecache/OtherModule-*.swiftmodule %t/modulecache/LeafModule-*.swiftmodule
+// RUN: echo "@inlinable func foo() { var x = 10 }" >>%t/LeafModule.swiftinterface
+// RUN: %S/Inputs/make-old.py %t/LeafModule.swiftinterface
+// RUN: %S/Inputs/check-is-old.py %t/LeafModule.swiftinterface
+// RUN: rm %t/TestModule.swiftmodule
+// RUN: %target-swift-frontend -I %t -module-cache-path %t/modulecache -enable-parseable-module-interface -emit-module -o %t/TestModule.swiftmodule -module-name TestModule %s >%t/warn.txt 2>&1
+// RUN: %S/Inputs/check-is-new.py %t/modulecache/OtherModule-*.swiftmodule %t/modulecache/LeafModule-*.swiftmodule
+// "check warn.txt exists and is empty"
+// RUN: test -e %t/warn.txt -a ! -s %t/warn.txt
+//
+//
+// Next test: make LeafModule.swiftinterface import NotAModule (which should emit an error); check we do not get a rebuild, do get an error.
+//
+// RUN: %S/Inputs/make-old.py %t/modulecache/*.swiftmodule %t/*.swiftinterface
+// RUN: %S/Inputs/check-is-old.py %t/OtherModule.swiftinterface %t/LeafModule.swiftinterface
+// RUN: %S/Inputs/check-is-old.py %t/modulecache/OtherModule-*.swiftmodule %t/modulecache/LeafModule-*.swiftmodule
+// RUN: echo "import NotAModule" >>%t/LeafModule.swiftinterface
+// RUN: %S/Inputs/make-old.py %t/LeafModule.swiftinterface
+// RUN: %S/Inputs/check-is-old.py %t/LeafModule.swiftinterface
+// RUN: rm %t/TestModule.swiftmodule
+// RUN: not %target-swift-frontend -I %t -module-cache-path %t/modulecache -enable-parseable-module-interface -emit-module -o %t/TestModule.swiftmodule -module-name TestModule %s >%t/err.txt 2>&1
+// RUN: %S/Inputs/check-is-old.py %t/modulecache/OtherModule-*.swiftmodule %t/modulecache/LeafModule-*.swiftmodule
+// RUN: %FileCheck %s -check-prefix=CHECK-ERROR <%t/err.txt
+// CHECK-ERROR: LeafModule.swiftinterface:5:8: error: no such module 'NotAModule'
+// CHECK-ERROR: OtherModule.swiftinterface:3:8: error: no such module 'LeafModule'
+//
+//
+// Next test: same as above, but with a .dia file
+//
+// RUN: %S/Inputs/check-is-old.py %t/OtherModule.swiftinterface %t/LeafModule.swiftinterface
+// RUN: %S/Inputs/check-is-old.py %t/modulecache/OtherModule-*.swiftmodule %t/modulecache/LeafModule-*.swiftmodule
+// RUN: not %target-swift-frontend -I %t -module-cache-path %t/modulecache -serialize-diagnostics -serialize-diagnostics-path %t/err.dia -enable-parseable-module-interface -emit-module -o %t/TestModule.swiftmodule -module-name TestModule %s
+// RUN: %S/Inputs/check-is-old.py %t/modulecache/OtherModule-*.swiftmodule %t/modulecache/LeafModule-*.swiftmodule
+// RUN: c-index-test -read-diagnostics %t/err.dia 2>&1 | %FileCheck %s -check-prefix=CHECK-ERROR
+
+import OtherModule
+
+public func TestFunc() {
+    print(OtherFunc())
+}
+