test : Add unit test for old deprecated Config constructor

- Add unit test for `@Deprecated` Config constructor. We don't know whether this public constructor is being used by any user. Adding a test just in case to verify that it behaves as expected. - Organize tests in `ConfigTest` to be grouped under various load sources - Add new test `ConfigSourcePrecedenceTest` for verifying Config source load precedence Signed-off-by: Rohan Kumar <[email protected]>
fabric8io · Jul 23, 2024 · 35dbbce · 35dbbce
1 parent 82f8406
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diff --git a/...tes-client-api/src/test/java/io/fabric8/kubernetes/client/ConfigSourcePrecedenceTest.java b/...tes-client-api/src/test/java/io/fabric8/kubernetes/client/ConfigSourcePrecedenceTest.java
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+/*
+ * Copyright (C) 2015 Red Hat, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.fabric8.kubernetes.client;
+
+import io.fabric8.kubernetes.client.utils.Utils;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+class ConfigSourcePrecedenceTest {
+
+  @Nested
+  @DisplayName("kubeconfig")
+  class KubeConfigSource {
+    @BeforeEach
+    void setUp() {
+      System.setProperty("kubeconfig", Utils.filePath(ConfigSourcePrecedenceTest.class.getResource("/test-kubeconfig")));
+    }
+
+    @Test
+    @DisplayName("no other source provided, use kubeconfig attributes in Config")
+    void whenNoOtherSourceProvided_thenUseKubeConfig() {
+      // Given
+      Config config = new ConfigBuilder().build();
+
+      // When + Then
+      assertThat(config)
+          .hasFieldOrPropertyWithValue("masterUrl", "https://172.28.128.4:8443/")
+          .hasFieldOrPropertyWithValue("namespace", "testns")
+          .hasFieldOrPropertyWithValue("autoOAuthToken", "token");
+    }
+
+    @Nested
+    @DisplayName("user configuration overrides KubeConfig attributes")
+    class UserConfigurationOverKubeConfig extends UserConfigurationViaConfigBuilder {
+    }
+
+    @Test
+    @DisplayName("System Properties configured, then give precedence to System Properties")
+    void whenSystemPropertiesUsedForSomeFields_thenSystemPropertiesGivenPrecedence() {
+      try {
+        // Given
+        System.setProperty("kubernetes.master", "https://user-configuration-override:8443");
+        System.setProperty("kubernetes.namespace", "namespace-overridden");
+        System.setProperty("kubernetes.auth.token", "token-overridden");
+
+        // When
+        Config config = new ConfigBuilder().build();
+
+        // Then
+        assertThat(config)
+            .hasFieldOrPropertyWithValue("masterUrl", "https://user-configuration-override:8443/")
+            .hasFieldOrPropertyWithValue("namespace", "namespace-overridden")
+            .hasFieldOrPropertyWithValue("autoOAuthToken", "token-overridden");
+      } finally {
+        System.clearProperty("kubernetes.master");
+        System.clearProperty("kubernetes.namespace");
+        System.clearProperty("kubernetes.auth.token");
+      }
+    }
+
+    @Test
+    @DisplayName("Service Account files provided, then do NOT use it")
+    void whenServiceAccountPropertyConfigured_thenDoNotUseIt() {
+      try {
+        // Given
+        System.setProperty("KUBERNETES_SERVICE_HOST", "10.96.0.1");
+        System.setProperty("KUBERNETES_SERVICE_PORT", "443");
+        System.setProperty("kubernetes.auth.serviceAccount.token",
+            Utils.filePath(ConfigSourcePrecedenceTest.class.getResource("/test-serviceaccount/token")));
+        System.setProperty("kubenamespace", Utils.filePath(ConfigSourcePrecedenceTest.class.getResource("/test-namespace")));
+        Config config = new ConfigBuilder().build();
+
+        // When + Then
+        assertThat(config)
+            .hasFieldOrPropertyWithValue("masterUrl", "https://172.28.128.4:8443/")
+            .hasFieldOrPropertyWithValue("namespace", "testns")
+            .hasFieldOrPropertyWithValue("autoOAuthToken", "token");
+      } finally {
+        System.clearProperty("KUBERNETES_SERVICE_HOST");
+        System.clearProperty("KUBERNETES_SERVICE_PORT");
+        System.clearProperty("kubernetes.auth.serviceAccount.token");
+        System.clearProperty("kubenamespace");
+      }
+    }
+  }
+
+  @Nested
+  @DisplayName("In Cluster mounted ServiceAccount")
+  class MountedServiceAccountSource {
+    @BeforeEach
+    void setUp() {
+      System.setProperty("kubeconfig", "/dev/null");
+      System.setProperty("KUBERNETES_SERVICE_HOST", "10.96.0.1");
+      System.setProperty("KUBERNETES_SERVICE_PORT", "443");
+      System.setProperty("kubernetes.auth.serviceAccount.token",
+          Utils.filePath(ConfigSourcePrecedenceTest.class.getResource("/test-serviceaccount/token")));
+      System.setProperty("kubenamespace", Utils.filePath(ConfigSourcePrecedenceTest.class.getResource("/test-namespace")));
+    }
+
+    @Test
+    @DisplayName("no other source provided, use ServiceAccount attributes in Config")
+    void whenNoOtherSourceProvided_thenUseServiceAccount() {
+      // Given
+      Config config = new ConfigBuilder().build();
+
+      // When + Then
+      assertThat(config)
+          .hasFieldOrPropertyWithValue("masterUrl", "https://10.96.0.1:443/")
+          .hasFieldOrPropertyWithValue("namespace", "testnsfrompath")
+          .extracting(Config::getAutoOAuthToken)
+          .asString()
+          .contains("token-from-mounted-serviceaccount");
+    }
+
+    @Nested
+    @DisplayName("user configuration overrides ServiceAccount's Config attributes")
+    class UserConfigurationOverServiceAccount extends UserConfigurationViaConfigBuilder {
+    }
+
+    @Test
+    @DisplayName("System Properties configured, then give precedence to System Properties")
+    void whenSystemPropertiesUsedForSomeFields_thenSystemPropertiesGivenPrecedence() {
+      try {
+        System.setProperty("kubernetes.master", "https://user-configuration-override:8443");
+        System.setProperty("kubernetes.namespace", "namespace-overridden");
+        System.setProperty("kubernetes.auth.token", "token-overridden");
+        Config config = new ConfigBuilder().build();
+
+        // When + Then
+        assertThat(config)
+            .hasFieldOrPropertyWithValue("masterUrl", "https://user-configuration-override:8443/")
+            .hasFieldOrPropertyWithValue("namespace", "namespace-overridden")
+            .hasFieldOrPropertyWithValue("autoOAuthToken", "token-overridden");
+      } finally {
+        System.clearProperty("kubernetes.master");
+        System.clearProperty("kubernetes.namespace");
+        System.clearProperty("kubernetes.auth.token");
+      }
+    }
+
+    @AfterEach
+    void tearDown() {
+      System.clearProperty("KUBERNETES_SERVICE_HOST");
+      System.clearProperty("KUBERNETES_SERVICE_PORT");
+      System.clearProperty("kubernetes.auth.serviceAccount.token");
+      System.clearProperty("kubenamespace");
+      System.clearProperty("kubeconfig");
+    }
+  }
+
+  @Nested
+  @DisplayName("System Properties")
+  class SystemPropertiesSource {
+    @BeforeEach
+    void setUp() {
+      System.setProperty("kubernetes.master", "https://user-configuration-override:8443");
+      System.setProperty("kubernetes.namespace", "namespace-overridden");
+      System.setProperty("kubernetes.auth.token", "token-overridden");
+    }
+
+    @Test
+    @DisplayName("when no other sources configured, then read from System properties")
+    void whenNoOtherSourceProvided_thenUseSystemProperties() {
+      assertThat(new ConfigBuilder().build())
+          .hasFieldOrPropertyWithValue("masterUrl", "https://user-configuration-override:8443/")
+          .hasFieldOrPropertyWithValue("namespace", "namespace-overridden")
+          .hasFieldOrPropertyWithValue("autoOAuthToken", "token-overridden");
+    }
+
+    @Nested
+    @DisplayName("User configuration overrides Config attributes configured via System Properties")
+    class UserConfigurationOverSystemProperties extends UserConfigurationViaConfigBuilder {
+    }
+
+    @AfterEach
+    void tearDown() {
+      System.clearProperty("kubernetes.master");
+      System.clearProperty("kubernetes.namespace");
+      System.clearProperty("kubernetes.auth.token");
+    }
+  }
+
+  private abstract static class UserConfigurationViaConfigBuilder {
+    @SuppressWarnings("unused")
+    @Test
+    @DisplayName("User configuration via builder given most precedence")
+    void whenUserConfigurationOverridesSomeFields_thenUserConfigurationGivenPrecedence() {
+      // Given
+      Config config = new ConfigBuilder()
+          .withMasterUrl("https://user-configuration-override:8443")
+          .withNamespace("namespace-overridden")
+          .withAutoOAuthToken("token-overridden")
+          .build();
+
+      // When + Then
+      assertThat(config)
+          .hasFieldOrPropertyWithValue("masterUrl", "https://user-configuration-override:8443/")
+          .hasFieldOrPropertyWithValue("namespace", "namespace-overridden")
+          .hasFieldOrPropertyWithValue("autoOAuthToken", "token-overridden");
+    }
+  }
+}