64 lines
2.2 KiB
Erlang
64 lines
2.2 KiB
Erlang
-module(migration_engine_tests).
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-include_lib("eunit/include/eunit.hrl").
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-include("records.hrl").
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-define(LOCK_VERSION, "__migration_lock__").
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setup() ->
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mnesia:stop(),
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mnesia:delete_schema([node()]),
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mnesia:create_schema([node()]),
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mnesia:start(),
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mnesia:create_table(schema_migration, [
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{disc_copies, [node()]},
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{attributes, record_info(fields, schema_migration)},
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{type, set}
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]),
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{ok, _} = migration_engine:start_link(),
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ok.
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cleanup(_) ->
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catch gen_server:stop(migration_engine),
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catch mnesia:delete_table(schema_migration),
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mnesia:stop(),
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mnesia:delete_schema([node()]),
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ok.
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migration_engine_test_() ->
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{foreach, fun setup/0, fun cleanup/1, [
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{"ensure_applied applies pending migrations", fun test_ensure_applied/0},
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{"ensure_applied is idempotent", fun test_ensure_applied_idempotent/0},
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{"lock record is not treated as migration", fun test_lock_not_applied/0},
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{"join node waits until migrations applied", fun test_join_wait/0}
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]}.
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test_ensure_applied() ->
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?assertEqual(ok, migration_engine:ensure_applied()),
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Status = migration_engine:status(),
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?assertEqual([], maps:get(pending, Status)),
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Applied = maps:get(applied, Status),
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?assert(lists:member("20260501120000_base_schema", Applied)),
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?assert(lists:member("20260504150000_test_migration", Applied)).
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test_ensure_applied_idempotent() ->
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?assertEqual(ok, migration_engine:ensure_applied()),
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?assertEqual(ok, migration_engine:ensure_applied()).
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test_lock_not_applied() ->
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?assertEqual(ok, migration_engine:ensure_applied()),
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Status = migration_engine:status(),
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?assertNot(lists:member(?LOCK_VERSION, maps:get(applied, Status))).
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test_join_wait() ->
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Now = calendar:universal_time(),
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mnesia:dirty_write(#schema_migration{version = ?LOCK_VERSION, applied_at = Now}),
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spawn(fun() ->
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timer:sleep(100),
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mnesia:dirty_write(#schema_migration{
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version = "20260501120000_base_schema", applied_at = Now}),
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mnesia:dirty_write(#schema_migration{
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version = "20260504150000_test_migration", applied_at = Now}),
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mnesia:dirty_delete({schema_migration, ?LOCK_VERSION})
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end),
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?assertEqual(ok, migration_engine:ensure_applied()).
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