26 lines
1 KiB
Ruby
26 lines
1 KiB
Ruby
# frozen_string_literal: true
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# Assert all the given foreign keys are indexed:
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#
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# ```
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# composite_foreign_keys = [['build_id', 'partition_id']]
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# indexed_columns = [['build_id', 'name', 'partition_id'], ['partition_id', 'build_id', 'name']]
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# expect(composite_foreign_keys).to be_indexed_by(indexed_columns)
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# ```
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#
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RSpec::Matchers.define :be_indexed_by do |indexed_columns|
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match do |composite_foreign_keys|
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composite_foreign_keys.all? do |composite_foreign_key|
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indexed_columns.any? do |columns|
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# for example, [build_id, partition_id] should be covered by indexes e.g.
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# - [build_id, partition_id, name]
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# - [partition_id, build_id, name]
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# but not by [build_id, name, partition_id]
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# therefore, we just need to take the first few columns (same length as composite key)
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# e.g. [partition_id, build_id] of [partition_id, build_id, name]
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# and compare with [build_id, partition_id]
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(composite_foreign_key - columns.first(composite_foreign_key.length)).blank?
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end
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end
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end
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end
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