chore: more tests

Signed-off-by: Giau. Tran Minh <[email protected]>

internal/wire/testdata/Subtract/foo/wire.go

@@ -18,8 +18,6 @@
 package main
 
 import (
-	// "strings"
-
 	"github.com/google/wire"
 )
 

internal/wire/testdata/SubtractErrors/foo/foo.go

@@ -0,0 +1,46 @@
+// Copyright 2018 The Wire 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.
+
+package main
+
+import (
+	"github.com/google/wire"
+)
+
+type context struct{}
+
+func main() {}
+
+type FooOptions struct{}
+type Foo string
+type Bar struct{}
+type BarName string
+
+func provideFooOptions() *FooOptions {
+	return &FooOptions{}
+}
+
+func provideFoo(*FooOptions) Foo {
+	return Foo("foo")
+}
+
+func provideBar(Foo, BarName) *Bar {
+	return &Bar{}
+}
+
+var Set = wire.NewSet(
+	provideFooOptions,
+	provideFoo,
+	provideBar,
+)

internal/wire/testdata/SubtractErrors/foo/wire.go

@@ -0,0 +1,34 @@
+// Copyright 2018 The Wire 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.
+
+//go:build wireinject
+// +build wireinject
+
+package main
+
+import (
+	"github.com/google/wire"
+)
+
+func injectMissArgs(opts *FooOptions) Foo {
+	panic(wire.Build(wire.Subtract(provideFoo)))
+}
+
+func injectNonSet(opts *FooOptions) Foo {
+	panic(wire.Build(wire.Subtract(provideFoo, new(FooOptions))))
+}
+
+func injectNonPointer(name BarName, opts *FooOptions) *Bar {
+	panic(wire.Build(wire.Subtract(Set, FooOptions{})))
+}

internal/wire/testdata/SubtractErrors/pkg

@@ -0,0 +1 @@
+example.com/foo

internal/wire/testdata/SubtractErrors/want/wire_errs.txt

@@ -0,0 +1,5 @@
+example.com/foo/wire.go:x:y: call to Subtract must specify types to be subtracted
+
+example.com/foo/wire.go:x:y: first argument to Subtract must be a Set
+
+example.com/foo/wire.go:x:y: argument to Subtract must be a pointer