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Add test coverage for ImplOfUndefinedInterface diagnostic #4484

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Original file line number Diff line number Diff line change
@@ -0,0 +1,102 @@
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/impl/no_prelude/fail_undefined_interface.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/impl/no_prelude/fail_undefined_interface.carbon

// --- fail_empty_struct.carbon

library "[[@TEST_NAME]]";

interface I;
// CHECK:STDERR: fail_empty_struct.carbon:[[@LINE+7]]:1: error: implementation of undefined interface I [ImplOfUndefinedInterface]
// CHECK:STDERR: impl {} as I {}
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR: fail_empty_struct.carbon:[[@LINE-4]]:1: note: interface was forward declared here [InterfaceForwardDeclaredHere]
// CHECK:STDERR: interface I;
// CHECK:STDERR: ^~~~~~~~~~~~
// CHECK:STDERR:
impl {} as I {}

// --- fail_class.carbon

library "[[@TEST_NAME]]";

interface J;
class C {}
// CHECK:STDERR: fail_class.carbon:[[@LINE+6]]:1: error: implementation of undefined interface J [ImplOfUndefinedInterface]
// CHECK:STDERR: impl C as J {}
// CHECK:STDERR: ^~~~~~~~~~~~~
// CHECK:STDERR: fail_class.carbon:[[@LINE-5]]:1: note: interface was forward declared here [InterfaceForwardDeclaredHere]
// CHECK:STDERR: interface J;
// CHECK:STDERR: ^~~~~~~~~~~~
impl C as J {}

// CHECK:STDOUT: --- fail_empty_struct.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %I.type: type = interface_type @I [template]
// CHECK:STDOUT: %.1: type = struct_type {} [template]
// CHECK:STDOUT: %.2: type = tuple_type () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [template] {
// CHECK:STDOUT: .I = %I.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %I.decl: type = interface_decl @I [template = constants.%I.type] {} {}
// CHECK:STDOUT: impl_decl @impl [template] {} {
// CHECK:STDOUT: %.loc12_7.1: %.1 = struct_literal ()
// CHECK:STDOUT: %.loc12_7.2: type = converted %.loc12_7.1, constants.%.1 [template = constants.%.1]
// CHECK:STDOUT: %I.ref: type = name_ref I, file.%I.decl [template = constants.%I.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @I;
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl: %.loc12_7.2 as %I.ref {
// CHECK:STDOUT: !members:
// CHECK:STDOUT: witness = <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_class.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %J.type: type = interface_type @J [template]
// CHECK:STDOUT: %C: type = class_type @C [template]
// CHECK:STDOUT: %.1: type = struct_type {} [template]
// CHECK:STDOUT: %.2: <witness> = complete_type_witness %.1 [template]
// CHECK:STDOUT: %.3: type = tuple_type () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [template] {
// CHECK:STDOUT: .J = %J.decl
// CHECK:STDOUT: .C = %C.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %J.decl: type = interface_decl @J [template = constants.%J.type] {} {}
// CHECK:STDOUT: %C.decl: type = class_decl @C [template = constants.%C] {} {}
// CHECK:STDOUT: impl_decl @impl [template] {} {
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [template = constants.%C]
// CHECK:STDOUT: %J.ref: type = name_ref J, file.%J.decl [template = constants.%J.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @J;
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl: %C.ref as %J.ref {
// CHECK:STDOUT: !members:
// CHECK:STDOUT: witness = <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT: %.loc5: <witness> = complete_type_witness %.1 [template = constants.%.2]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
1 change: 0 additions & 1 deletion toolchain/diagnostics/coverage_test.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,6 @@ constexpr DiagnosticKind UntestedDiagnosticKinds[] = {
DiagnosticKind::ExternLibraryInImporter,
DiagnosticKind::ExternLibraryOnDefinition,
DiagnosticKind::HexadecimalEscapeMissingDigits,
DiagnosticKind::ImplOfUndefinedInterface,
DiagnosticKind::IncompleteTypeInFunctionParam,
DiagnosticKind::InvalidDigit,
DiagnosticKind::InvalidDigitSeparator,
Expand Down
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