Add new tests for SiteStore

Author: itsmeichigo

Yosemite/YosemiteTests/Stores/SiteStoreTests.swift

@@ -323,6 +323,47 @@ final class SiteStoreTests: XCTestCase {
         let error = try XCTUnwrap(result.failure)
         XCTAssertEqual(error as? DotcomError, .unknown(code: "error", message: nil))
     }
+
+    // MARK: - `syncSiteByDomain`
+
+   func test_syncSiteByDomain_returns_site_on_success() {
+       // Given
+       let siteID: Int64 = 123
+       let domain = "example.com"
+       let site = Site.fake().copy(siteID: siteID, name: "Miffy", url: "https://\(domain)")
+       remote.whenLoadingSite(thenReturn: .success(site))
+
+       // When
+       let result = waitFor { promise in
+           self.store.onAction(SiteAction.syncSiteByDomain(domain: domain, completion: { result in
+               promise(result)
+           }))
+       }
+
+       // Then
+       XCTAssertTrue(result.isSuccess)
+       let loadedSite = viewStorage.loadSite(siteID: siteID)
+       XCTAssertEqual(loadedSite?.name, "Miffy")
+   }
+
+   func test_syncSiteByDomain_returns_error_on_failure() throws {
+       // Given
+       let siteID: Int64 = 123
+       let domain = "example.com"
+       remote.whenLoadingSite(thenReturn: .failure(DotcomError.unknown(code: "error", message: nil)))
+
+       // When
+       let result = waitFor { promise in
+           self.store.onAction(SiteAction.syncSiteByDomain(domain: domain, completion: { result in
+               promise(result)
+           }))
+       }
+
+       // Then
+       XCTAssertFalse(result.isSuccess)
+       let error = try XCTUnwrap(result.failure)
+       XCTAssertEqual(error as? DotcomError, .unknown(code: "error", message: nil))
+   }
 }
 
 private extension SiteStoreTests {