Add test for cloudchamber buildAndMaybePush (cloudflare#9638)

Tests the code path where push flag is set but the image exists already
in the remote so we do not want to push and instead want to untag the
image.

Author: IRCody

packages/wrangler/src/__tests__/cloudchamber/build.test.ts

@@ -119,6 +119,50 @@ describe("buildAndMaybePush", () => {
 		expect(dockerLoginManagedRegistry).toHaveBeenCalledOnce();
 	});
 
+	it("should be able to build image and not push if it already exists in remote", async () => {
+		vi.mocked(getDockerImageDigest).mockResolvedValue("three");
+		vi.mocked(runDockerCmd).mockResolvedValueOnce();
+		await runWrangler(
+			"containers build ./container-context -t test-app:tag -p"
+		);
+		expect(dockerBuild).toHaveBeenCalledWith("docker", {
+			buildCmd: [
+				"build",
+				"-t",
+				`${getCloudflareContainerRegistry()}/test_account_id/test-app:tag`,
+				"--platform",
+				"linux/amd64",
+				"--provenance=false",
+				"-f",
+				"-",
+				"./container-context",
+			],
+			dockerfile,
+		});
+		expect(runDockerCmd).toHaveBeenCalledTimes(2);
+		expect(runDockerCmd).toHaveBeenNthCalledWith(
+			1,
+			"docker",
+			[
+				"manifest",
+				"inspect",
+				`${getCloudflareContainerRegistry()}/test_account_id/test-app@three`,
+			],
+			"ignore"
+		);
+		expect(runDockerCmd).toHaveBeenNthCalledWith(2, "docker", [
+			"image",
+			"rm",
+			`${getCloudflareContainerRegistry()}/test_account_id/test-app:tag`,
+		]);
+		expect(dockerImageInspect).toHaveBeenCalledOnce();
+		expect(dockerImageInspect).toHaveBeenCalledWith("docker", {
+			imageTag: `${getCloudflareContainerRegistry()}/test_account_id/test-app:tag`,
+			formatString: "{{ .Size }} {{ len .RootFS.Layers }}",
+		});
+		expect(dockerLoginManagedRegistry).toHaveBeenCalledOnce();
+	});
+
 	it("should be able to build image and not push", async () => {
 		await runWrangler("containers build ./container-context -t test-app");
 		expect(dockerBuild).toHaveBeenCalledTimes(1);