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@ -4,8 +4,10 @@
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package codegen
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import (
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"go/types"
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"log"
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"net/netip"
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"strings"
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"testing"
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"unsafe"
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@ -174,3 +176,79 @@ func TestGenericContainsPointers(t *testing.T) {
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})
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}
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}
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func TestAssertStructUnchanged(t *testing.T) {
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type args struct {
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t *types.Struct
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tname string
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params *types.TypeParamList
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ctx string
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it *ImportTracker
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}
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// package t1 with a struct T1 with two fields
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p1 := types.NewPackage("t1", "t1")
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t1 := types.NewNamed(types.NewTypeName(0, p1, "T1", nil), types.NewStruct([]*types.Var{
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types.NewField(0, nil, "P1", types.Typ[types.Int], false),
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types.NewField(0, nil, "P2", types.Typ[types.String], false),
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}, nil), nil)
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p1.Scope().Insert(t1.Obj())
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tests := []struct {
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name string
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args args
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want []byte
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}{
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{
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name: "t1-internally_defined",
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args: args{
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t: t1.Underlying().(*types.Struct),
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tname: "prefix_",
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params: nil,
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ctx: "",
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it: NewImportTracker(p1),
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},
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want: []byte("var _prefix_NeedsRegeneration = prefix_(struct {\n\tP1 int \n\tP2 string \n}{})"),
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},
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{
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name: "t2-with_named_field",
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args: args{
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t: types.NewStruct([]*types.Var{
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types.NewField(0, nil, "T1", t1, false),
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types.NewField(0, nil, "P1", types.Typ[types.Int], false),
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types.NewField(0, nil, "P2", types.Typ[types.String], false),
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}, nil),
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tname: "prefix_",
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params: nil,
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ctx: "",
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it: NewImportTracker(types.NewPackage("t2", "t2")),
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},
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// the struct should be regenerated with the named field
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want: []byte("var _prefix_NeedsRegeneration = prefix_(struct {\n\tT1 t1.T1 \n\tP1 int \n\tP2 string \n}{})"),
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},
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{
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name: "t3-with_embedded_field",
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args: args{
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t: types.NewStruct([]*types.Var{
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types.NewField(0, nil, "T1", t1, true),
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types.NewField(0, nil, "P1", types.Typ[types.Int], false),
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types.NewField(0, nil, "P2", types.Typ[types.String], false),
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}, nil),
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tname: "prefix_",
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params: nil,
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ctx: "",
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it: NewImportTracker(types.NewPackage("t3", "t3")),
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},
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// the struct should be regenerated with the embedded field
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want: []byte("var _prefix_NeedsRegeneration = prefix_(struct {\n\tt1.T1 \n\tP1 int \n\tP2 string \n}{})"),
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if got := AssertStructUnchanged(tt.args.t, tt.args.tname, tt.args.params, tt.args.ctx, tt.args.it); !strings.Contains(string(got), string(tt.want)) {
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t.Errorf("AssertStructUnchanged() = \n%s\nwant: \n%s", string(got), string(tt.want))
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}
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})
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}
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}
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