RegistryTransactionTest.kt

1package com.peachpasswords.sync23import org.junit.Assert.assertEquals4import org.junit.Assert.assertFalse5import org.junit.Assert.assertTrue6import org.junit.Test78/** Pure failure-injection coverage for the real SharedPreferences transaction helper. */9class RegistryTransactionTest {10    @Test11    fun failed_forward_commit_explicitly_restores_prior_state() {12        var state = "prior"13        val writes = mutableListOf<String>()1415        val applied = commitWithRollback("prior", "next", commit = { candidate ->16            writes += candidate17            state = candidate18            candidate != "next"19        })2021        assertFalse(applied)22        assertEquals("prior", state)23        assertEquals(listOf("next", "prior"), writes)24    }2526    @Test27    fun successful_forward_commit_does_not_run_rollback() {28        var state = "prior"29        val writes = mutableListOf<String>()3031        val applied = commitWithRollback("prior", "next", commit = { candidate ->32            writes += candidate33            state = candidate34            true35        })3637        assertTrue(applied)38        assertEquals("next", state)39        assertEquals(listOf("next"), writes)40    }41}