relationship test specifying only the table (assumed to be in same source)

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1

I have multiple sources with the same table structure, on which various datatests need to be done.

I want to DRY up the definition of my source tests by using yaml anchors e.g.

sources:
  - name: source1
    schema: schema1
    tables: &tables
      - name: table1
        columns:
          - &pk-column
            name: column1
            data_tests:
              - not_null
              - unique
      - name: table2
        columns:
          - *pk-column
          - name: column2
            data_tests:
              - relationships:
                  arguments:
                    to: source('source1','table1')
                    field: column1

  - name: source2
    schema: schema2
    tables: *tables

That all works beautifully except that schema2.table2.column2 is tested against schema1.table1.column1 instead of schema2.table1.column1.

Is there any way to define the to argument without providing an explicit source name i.e. so that the schema of table1 is assumed to be the same as the schema of the table2 being tested?

The source macro insists on two arguments, {{source.schema}} does not return anything and {{this.schema}} returns the target schema of the test result.