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| 1 | +package com.paypal.android.corepayments.api |
| 2 | + |
| 3 | +import com.paypal.android.corepayments.APIRequest |
| 4 | +import com.paypal.android.corepayments.CoreConfig |
| 5 | +import com.paypal.android.corepayments.Environment |
| 6 | +import com.paypal.android.corepayments.HttpMethod |
| 7 | +import com.paypal.android.corepayments.HttpResponse |
| 8 | +import com.paypal.android.corepayments.RestClient |
| 9 | +import io.mockk.coEvery |
| 10 | +import io.mockk.coVerify |
| 11 | +import io.mockk.mockk |
| 12 | +import io.mockk.slot |
| 13 | +import junit.framework.TestCase.assertEquals |
| 14 | +import junit.framework.TestCase.assertTrue |
| 15 | +import kotlinx.coroutines.ExperimentalCoroutinesApi |
| 16 | +import kotlinx.coroutines.test.runTest |
| 17 | +import org.junit.Before |
| 18 | +import org.junit.Test |
| 19 | +import org.junit.runner.RunWith |
| 20 | +import org.robolectric.RobolectricTestRunner |
| 21 | + |
| 22 | +@ExperimentalCoroutinesApi |
| 23 | +@RunWith(RobolectricTestRunner::class) |
| 24 | +class AuthenticationSecureTokenServiceAPIUnitTest { |
| 25 | + |
| 26 | + private lateinit var restClient: RestClient |
| 27 | + private lateinit var coreConfig: CoreConfig |
| 28 | + private lateinit var sut: AuthenticationSecureTokenServiceAPI |
| 29 | + |
| 30 | + @Before |
| 31 | + fun beforeEach() { |
| 32 | + coreConfig = CoreConfig("test-client-id", Environment.SANDBOX) |
| 33 | + restClient = mockk(relaxed = true) |
| 34 | + sut = AuthenticationSecureTokenServiceAPI(coreConfig, restClient) |
| 35 | + } |
| 36 | + |
| 37 | + @Test |
| 38 | + fun `createLowScopedAccessToken() makes correct API request with proper headers and body`() = |
| 39 | + runTest { |
| 40 | + // Given |
| 41 | + val successResponse = HttpResponse( |
| 42 | + status = 200, |
| 43 | + body = """{"access_token": "test-token", "token_type": "Bearer", "expires_in": 3600}""" |
| 44 | + ) |
| 45 | + coEvery { restClient.send(any()) } returns successResponse |
| 46 | + |
| 47 | + val requestSlot = slot<APIRequest>() |
| 48 | + |
| 49 | + // When |
| 50 | + val result = sut.createLowScopedAccessToken() |
| 51 | + |
| 52 | + // Then |
| 53 | + coVerify { restClient.send(capture(requestSlot)) } |
| 54 | + |
| 55 | + val capturedRequest = requestSlot.captured |
| 56 | + assertEquals("v1/oauth2/token", capturedRequest.path) |
| 57 | + assertEquals(HttpMethod.POST, capturedRequest.method) |
| 58 | + assertEquals("grant_type=client_credentials&response_type=token", capturedRequest.body) |
| 59 | + |
| 60 | + // Verify headers |
| 61 | + val headers = capturedRequest.headers!! |
| 62 | + assertEquals("application/x-www-form-urlencoded", headers["Content-Type"]) |
| 63 | + assert(headers["Authorization"]!!.startsWith("Basic ")) |
| 64 | + |
| 65 | + assertTrue(result is CreateLowScopedAccessTokenResult.Success) |
| 66 | + assertEquals("test-token", (result as CreateLowScopedAccessTokenResult.Success).token) |
| 67 | + } |
| 68 | + |
| 69 | + @Test |
| 70 | + fun `createLowScopedAccessToken() returns access token from successful response`() = runTest { |
| 71 | + // Given |
| 72 | + val expectedToken = "test-access-token-12345" |
| 73 | + val successResponse = HttpResponse( |
| 74 | + status = 200, |
| 75 | + body = """{"access_token": "$expectedToken", "token_type": "Bearer", "expires_in": 3600}""" |
| 76 | + ) |
| 77 | + coEvery { restClient.send(any()) } returns successResponse |
| 78 | + |
| 79 | + // When |
| 80 | + val result = sut.createLowScopedAccessToken() |
| 81 | + |
| 82 | + // Then |
| 83 | + assertTrue(result is CreateLowScopedAccessTokenResult.Success) |
| 84 | + assertEquals(expectedToken, (result as CreateLowScopedAccessTokenResult.Success).token) |
| 85 | + } |
| 86 | + |
| 87 | + @Test |
| 88 | + fun `createLowScopedAccessToken() returns failure when response is not successful`() = runTest { |
| 89 | + // Given |
| 90 | + val errorResponse = HttpResponse( |
| 91 | + status = 401, |
| 92 | + body = """{"error": "invalid_client", "error_description": "Client authentication failed"}""" |
| 93 | + ) |
| 94 | + coEvery { restClient.send(any()) } returns errorResponse |
| 95 | + |
| 96 | + // When |
| 97 | + val result = sut.createLowScopedAccessToken() |
| 98 | + |
| 99 | + // Then |
| 100 | + assertTrue(result is CreateLowScopedAccessTokenResult.Failure) |
| 101 | + } |
| 102 | + |
| 103 | + @Test |
| 104 | + fun `createLowScopedAccessToken() returns failure when response body is null`() = runTest { |
| 105 | + // Given |
| 106 | + val successResponse = HttpResponse( |
| 107 | + status = 200, |
| 108 | + body = null |
| 109 | + ) |
| 110 | + coEvery { restClient.send(any()) } returns successResponse |
| 111 | + |
| 112 | + // When |
| 113 | + val result = sut.createLowScopedAccessToken() |
| 114 | + |
| 115 | + // Then |
| 116 | + assertTrue(result is CreateLowScopedAccessTokenResult.Failure) |
| 117 | + } |
| 118 | + |
| 119 | + @Test |
| 120 | + fun `createLowScopedAccessToken() returns failure when response is not valid JSON`() = runTest { |
| 121 | + // Given |
| 122 | + val successResponse = HttpResponse( |
| 123 | + status = 200, |
| 124 | + body = "invalid-json-response" |
| 125 | + ) |
| 126 | + coEvery { restClient.send(any()) } returns successResponse |
| 127 | + |
| 128 | + // When |
| 129 | + val result = sut.createLowScopedAccessToken() |
| 130 | + |
| 131 | + // Then |
| 132 | + assertTrue(result is CreateLowScopedAccessTokenResult.Failure) |
| 133 | + // Expected JSONException wrapped in PayPalSDKError |
| 134 | + } |
| 135 | + |
| 136 | + @Test |
| 137 | + fun `createLowScopedAccessToken() returns failure when access_token field is missing from successful response`() = |
| 138 | + runTest { |
| 139 | + // Given |
| 140 | + val successResponse = HttpResponse( |
| 141 | + status = 200, |
| 142 | + body = """{"token_type": "Bearer", "expires_in": 3600}""" |
| 143 | + ) |
| 144 | + coEvery { restClient.send(any()) } returns successResponse |
| 145 | + |
| 146 | + // When |
| 147 | + val result = sut.createLowScopedAccessToken() |
| 148 | + |
| 149 | + // Then |
| 150 | + assertTrue(result is CreateLowScopedAccessTokenResult.Failure) |
| 151 | + val error = (result as CreateLowScopedAccessTokenResult.Failure).error |
| 152 | + assertTrue(error.errorDescription.contains("Missing access_token in response")) |
| 153 | + } |
| 154 | + |
| 155 | + @Test |
| 156 | + fun `createLowScopedAccessToken() handles empty response body with proper error message`() = |
| 157 | + runTest { |
| 158 | + // Given |
| 159 | + val errorResponse = HttpResponse( |
| 160 | + status = 500, |
| 161 | + body = "" |
| 162 | + ) |
| 163 | + coEvery { restClient.send(any()) } returns errorResponse |
| 164 | + |
| 165 | + // When |
| 166 | + val result = sut.createLowScopedAccessToken() |
| 167 | + |
| 168 | + // Then |
| 169 | + assertTrue(result is CreateLowScopedAccessTokenResult.Failure) |
| 170 | + val errorMessage = |
| 171 | + (result as CreateLowScopedAccessTokenResult.Failure).error.errorDescription |
| 172 | + // The error description will be the empty body from the HTTP response |
| 173 | + assertEquals("", errorMessage) |
| 174 | + } |
| 175 | + |
| 176 | + @Test |
| 177 | + fun `createLowScopedAccessToken() includes error message in exception when available`() = |
| 178 | + runTest { |
| 179 | + // Given |
| 180 | + val errorMessage = "Server temporarily unavailable" |
| 181 | + val errorResponse = HttpResponse( |
| 182 | + status = 503, |
| 183 | + body = errorMessage |
| 184 | + ) |
| 185 | + coEvery { restClient.send(any()) } returns errorResponse |
| 186 | + |
| 187 | + // When |
| 188 | + val result = sut.createLowScopedAccessToken() |
| 189 | + |
| 190 | + // Then |
| 191 | + assertTrue(result is CreateLowScopedAccessTokenResult.Failure) |
| 192 | + val description = |
| 193 | + (result as CreateLowScopedAccessTokenResult.Failure).error.errorDescription |
| 194 | + // The error description will be the error message from the HTTP response body |
| 195 | + assertEquals(errorMessage, description) |
| 196 | + } |
| 197 | + |
| 198 | + @Test |
| 199 | + fun `createLowScopedAccessToken() creates proper Basic Auth header from client ID`() = runTest { |
| 200 | + // Given |
| 201 | + val clientId = "test-client-123" |
| 202 | + val configWithCustomClientId = CoreConfig(clientId, Environment.LIVE) |
| 203 | + val sutWithCustomConfig = |
| 204 | + AuthenticationSecureTokenServiceAPI(configWithCustomClientId, restClient) |
| 205 | + |
| 206 | + val successResponse = HttpResponse( |
| 207 | + status = 200, |
| 208 | + body = """{"access_token": "token", "token_type": "Bearer"}""" |
| 209 | + ) |
| 210 | + coEvery { restClient.send(any()) } returns successResponse |
| 211 | + |
| 212 | + val requestSlot = slot<APIRequest>() |
| 213 | + |
| 214 | + // When |
| 215 | + sutWithCustomConfig.createLowScopedAccessToken() |
| 216 | + |
| 217 | + // Then |
| 218 | + coVerify { restClient.send(capture(requestSlot)) } |
| 219 | + |
| 220 | + val authHeader = requestSlot.captured.headers!!["Authorization"]!! |
| 221 | + assert(authHeader.startsWith("Basic ")) |
| 222 | + |
| 223 | + // Decode and verify the Basic auth contains the client ID |
| 224 | + val encodedCredentials = authHeader.substring("Basic ".length) |
| 225 | + val decodedClientId = |
| 226 | + android.util.Base64.decode(encodedCredentials, android.util.Base64.DEFAULT) |
| 227 | + .decodeToString() |
| 228 | + assertEquals(clientId, decodedClientId) |
| 229 | + } |
| 230 | +} |
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