Added unit test cases

Author: LokeshDogga13

plugins/amazonq/chat/jetbrains-community/tst/software/aws/toolkits/jetbrains/services/amazonq/lsp/artifacts/ManifestFetcherTest.kt

@@ -0,0 +1,64 @@
+// Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package software.aws.toolkits.jetbrains.services.amazonq.lsp.artifacts
+
+
+import io.mockk.every
+import io.mockk.spyk
+import io.mockk.verify
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import software.aws.toolkits.jetbrains.services.amazonq.project.manifest.ManifestManager
+
+class ManifestFetcherTest {
+
+    private lateinit var manifestFetcher: ManifestFetcher
+    private lateinit var manifest: ManifestManager.Manifest
+
+    @BeforeEach
+    fun setup() {
+        manifestFetcher = ManifestFetcher()
+        manifest = ManifestManager.Manifest()
+    }
+
+
+    @Test
+    fun `should return null when both local and remote manifests are null`() {
+
+        val fetchLocalManifestMock = spyk<ManifestFetcher>(recordPrivateCalls = true)
+
+        every { fetchLocalManifestMock["fetchManifestFromLocal"]() } returns null
+        every { fetchLocalManifestMock["fetchManifestFromRemote"]() } returns null
+
+        assertEquals(fetchLocalManifestMock.fetch(), null)
+        verify { fetchLocalManifestMock["fetchManifestFromLocal"]() }
+        verify { fetchLocalManifestMock["fetchManifestFromRemote"]() }
+    }
+
+    @Test
+    fun `should return valid result from local should not execute remote method`() {
+
+        val fetchLocalManifestMock = spyk<ManifestFetcher>(recordPrivateCalls = true)
+
+        every { fetchLocalManifestMock["fetchManifestFromLocal"]() } returns manifest
+        every { fetchLocalManifestMock["fetchManifestFromRemote"]() } returns null
+
+        assertEquals(fetchLocalManifestMock.fetch(), manifest)
+        verify { fetchLocalManifestMock["fetchManifestFromLocal"]() }
+    }
+
+    @Test
+    fun `should return valid result from remote`() {
+
+        val fetchLocalManifestMock = spyk<ManifestFetcher>(recordPrivateCalls = true)
+
+        every { fetchLocalManifestMock["fetchManifestFromLocal"]() } returns null
+        every { fetchLocalManifestMock["fetchManifestFromRemote"]() } returns manifest
+
+        assertEquals(fetchLocalManifestMock.fetch(), manifest)
+        verify { fetchLocalManifestMock["fetchManifestFromLocal"]() }
+        verify { fetchLocalManifestMock["fetchManifestFromRemote"]() }
+    }
+}