files:
- path: "a.proto"
  text: |
    syntax = "proto2";
    package test;

    message M {
      extensions 1 to max;
    }

- path: "b.proto"
  text: |
    syntax = "proto2";
    package test;

    import "a.proto";

    extend M {
      optional int32 a = 1;
    }

- path: "c.proto"
  text: |
    syntax = "proto2";
    package test;

    import "a.proto";

    extend M {
      optional int32 b = 1;
    }

    extend test.M {
      optional int32 c = 2;
    }

    extend .test.M {
      optional int32 d = 3;
    }

# d.proto is not part of the workspace but its extension should still participate
# in the duplicate check because it is a direct import of e.proto.
- path: "d.proto"
  import: true
  text: |
    syntax = "proto2";
    package test;

    import public "a.proto";

    extend M {
      optional int32 e = 4;
    }

- path: "e.proto"
  text: |
    syntax = "proto2";
    package test;

    import "d.proto";

    extend M {
      optional int32 f = 4;
    }