Testing Guidelines

This guide outlines testing guidelines and best practices for TrustWeave.

Overview

TrustWeave testing strategy includes:

• Unit Tests – test individual components in isolation
• Integration Tests – test component interactions
• End-to-End Tests – test complete workflows
• Test Utilities – trustweave-testkit for in-memory implementations

Testing Principles

Test Isolation

Each test should be independent:

@Test
fun testIsolated() = runBlocking {
    // Each test gets its own fixture
    val fixture = TrustWeaveTestFixture.builder().build().use { fixture ->
        // Test code
    }
}

Test Naming

Use descriptive test names:

@Test
fun testCreateDidWithEd25519Algorithm() = runBlocking {
    // ...
}

Test Organization

Organize tests by functionality:

class DidMethodTest {
    @Test
    fun testCreateDid() = runBlocking {
        // ...
    }

    @Test
    fun testResolveDid() = runBlocking {
        // ...
    }
}

Unit Testing

Testing DID Methods

import org.trustweave.testkit.*
import org.trustweave.did.*
import kotlin.test.Test
import kotlin.test.assertNotNull

class DidMethodTest {
    @Test
    fun testCreateDid() = runBlocking {
        val kms = InMemoryKeyManagementService()
        val method = DidKeyMockMethod(kms)

        val options = didCreationOptions {
            algorithm = KeyAlgorithm.Ed25519
        }

        val did = method.createDid(options)
        assertNotNull(did)
        assert(did.id.startsWith("did:key:"))
    }
}

Testing Key Management

import org.trustweave.testkit.kms.InMemoryKeyManagementService
import org.trustweave.kms.*
import kotlin.test.Test

class KmsTest {
    @Test
    fun testGenerateAndSign() = runBlocking {
        val kms = InMemoryKeyManagementService()

        val key = kms.generateKey(Algorithm.Ed25519)
        assertNotNull(key)

        val data = "Hello, TrustWeave!".toByteArray()
        val signature = kms.sign(key.id, data)

        assertNotNull(signature)
        assertEquals(64, signature.size) // Ed25519 signature size
    }
}

Integration Testing

Testing Credential Workflows

import kotlinx.coroutines.runBlocking
import org.trustweave.credential.results.VerificationResult
import org.trustweave.testkit.services.*
import org.trustweave.trust.TrustWeave
import org.trustweave.trust.dsl.credential.*
import org.trustweave.trust.types.getOrThrow
import org.trustweave.credential.results.getOrThrow
import org.trustweave.trust.types.getOrThrowDid
import kotlin.test.Test
import kotlin.test.assertTrue

class CredentialWorkflowTest {
    @Test
    fun testCredentialIssuanceAndVerification() = runBlocking {
        val trustWeave = TrustWeave.build {
            keys { provider(IN_MEMORY); algorithm(ED25519) }
            did { method(KEY) { algorithm(ED25519) } }
        }
        val issuerDid = trustWeave.createDid { }.getOrThrowDid()
        val credential = trustWeave.issue {
            credential {
                type("VerifiableCredential", "PersonCredential")
                issuer(issuerDid)
                subject {
                    id("did:key:subject")
                    "name" to "Alice"
                }
            }
            signedBy(issuerDid, "key-1")
        }.getOrThrow()
        val verification = trustWeave.verify(credential)
        assertTrue(verification is VerificationResult.Valid, verification.toString())
    }
}

End-to-End Testing

EO Integration Tests

import org.trustweave.credential.results.VerificationResult
import org.trustweave.testkit.eo.BaseEoIntegrationTest
import org.trustweave.testkit.anchor.InMemoryBlockchainAnchorClient
import org.trustweave.anchor.*
import kotlin.test.Test

class MyEoIntegrationTest : BaseEoIntegrationTest() {
    override fun createAnchorClient(
        chainId: String,
        options: Map<String, Any?>
    ): BlockchainAnchorClient {
        return InMemoryBlockchainAnchorClient(chainId)
    }

    @Test
    fun testEoScenario() = runBlocking {
        val result = runEoTestScenario()
        assert(result.verificationResult is VerificationResult.Valid)
    }
}

Test Utilities

TrustWeaveTestFixture

Use test fixtures for setup:

import org.trustweave.testkit.*
import kotlin.test.Test
import org.trustweave.testkit.services.*

class FixtureTest {
    @Test
    fun testWithFixture() = runBlocking {
        val fixture = TrustWeaveTestFixture.builder()
            .withKms(InMemoryKeyManagementService())
            .withDidmethod(KEY) { DidKeyMockMethod(it) }
            .withBlockchainClient("algorand:testnet") {
                InMemoryBlockchainAnchorClient("algorand:testnet")
            }
            .build()
            .use { fixture ->
                val issuerDoc = fixture.createIssuerDid()
                assertNotNull(issuerDoc)
            }
    }
}

Error Testing

Testing Error Cases

@Test
fun testErrorHandling() = runBlocking {
    val kms = InMemoryKeyManagementService()

    val result = kms.sign("nonexistent-key", "data".toByteArray())
    result.fold(
        onSuccess = { fail("Expected error") },
        onFailure = { error ->
            assert(error is TrustWeaveException.NotFound)
        }
    )
}

Testing Validation

@Test
fun testInvalidInput() = runBlocking {
    val method = DidKeyMockMethod(InMemoryKeyManagementService())

    val result = method.resolveDid("invalid-did")
    result.fold(
        onSuccess = { fail("Expected error") },
        onFailure = { error ->
            assert(error is DidException.DidResolutionFailed)
        }
    )
}

Best Practices

Resource Cleanup

Always use use {} for cleanup:

fixture.use { fixture ->
    // Test code
    // Automatic cleanup on exit
}

Test Data

Use meaningful test data:

val issuerDid = "did:key:z6MkhaXgBZDvotDkL5257faiztiGiC2QtKLGpbnnEGta2doK"
val subjectDid = "did:key:z6MkhbXBZDvotDkL5257faiztiGiC2QtKLGpbnnEGta2doK"

Assertions

Use descriptive assertions:

// Good
assertNotNull(did, "DID should not be null")
assertEquals("did:key:", did.id.substring(0, 8), "DID should start with did:key:")

// Less clear
assert(did != null)
assert(did.id.startsWith("did:key:"))

Test Coverage

Coverage Goals

Aim for:

• Unit Tests – 80%+ coverage
• Integration Tests – cover critical paths
• End-to-End Tests – cover main workflows

Measuring Coverage

./gradlew test jacocoTestReport

Running Tests

All Tests

./gradlew test

Specific Module

./gradlew :common:test

Specific Test Class

./gradlew :common:test --tests "DidMethodTest"

With Verbose Output

./gradlew test --info

Next Steps

• Review trustweave-testkit Module for testing utilities
• See Testing Strategies for advanced patterns
• Check Development Setup for environment setup
• Explore existing tests in TrustWeave modules for examples

References

• trustweave-testkit Module](../modules/trustweave-testkit.md)
• Testing Strategies](../advanced/testing-strategies.md)
• Kotlin Test Documentation](https://kotlinlang.org/api/latest/kotlin.test/)