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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.handler.metrics;
import ai.vespa.json.Jackson;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.github.tomakehurst.wiremock.junit5.WireMockExtension;
import com.yahoo.container.jdisc.RequestHandlerTestDriver;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.RegisterExtension;
import java.util.concurrent.Executors;
import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
import static com.github.tomakehurst.wiremock.client.WireMock.equalTo;
import static com.github.tomakehurst.wiremock.client.WireMock.get;
import static com.github.tomakehurst.wiremock.client.WireMock.urlPathEqualTo;
import static com.github.tomakehurst.wiremock.core.WireMockConfiguration.options;
import static com.yahoo.container.handler.metrics.MetricsV2Handler.consumerQuery;
import static com.yahoo.container.handler.metrics.MetricsV2HandlerTest.getFileContents;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
/**
* @author gjoranv
*/
public class PrometheusV1HandlerTest {
private static final String URI_BASE = "http://localhost";
private static final String V1_URI = URI_BASE + PrometheusV1Handler.V1_PATH;
private static final String VALUES_URI = URI_BASE + PrometheusV1Handler.VALUES_PATH;
// Mock applicationmetrics api
private static final String MOCK_METRICS_PATH = "/node0";
private static final String TEST_FILE = "application-prometheus.txt";
private static final String RESPONSE = getFileContents(TEST_FILE);
private static final String CPU_METRIC = "cpu";
private static final String REPLACED_CPU_METRIC = "replaced_cpu";
private static final String CUSTOM_CONSUMER = "custom-consumer";
private static RequestHandlerTestDriver testDriver;
@RegisterExtension
public WireMockExtension wireMockRule = WireMockExtension.newInstance().options(options().dynamicPort()).build();
@BeforeEach
public void setup() {
setupWireMock();
var handler = new PrometheusV1Handler(Executors.newSingleThreadExecutor(),
new MetricsProxyApiConfig.Builder()
.prometheusApiPath(MOCK_METRICS_PATH)
.metricsPort(wireMockRule.getPort())
.metricsApiPath("/Not/In/Use")
.build());
testDriver = new RequestHandlerTestDriver(handler);
}
private void setupWireMock() {
wireMockRule.stubFor(get(urlPathEqualTo(MOCK_METRICS_PATH))
.willReturn(aResponse().withBody(RESPONSE)));
// Add a slightly different response for a custom consumer.
String myConsumerResponse = RESPONSE.replaceAll(CPU_METRIC, REPLACED_CPU_METRIC);
wireMockRule.stubFor(get(urlPathEqualTo(MOCK_METRICS_PATH))
.withQueryParam("consumer", equalTo(CUSTOM_CONSUMER))
.willReturn(aResponse().withBody(myConsumerResponse)));
}
@Test
void v1_response_contains_values_uri() throws Exception {
String response = testDriver.sendRequest(V1_URI).readAll();
JsonNode root = Jackson.mapper().readTree(response);
assertTrue(root.has("resources"));
ArrayNode resources = (ArrayNode) root.get("resources");
assertEquals(1, resources.size());
JsonNode valuesUri = resources.get(0);
assertEquals(VALUES_URI, valuesUri.get("url").asText());
}
@Disabled
@Test
void visually_inspect_values_response() {
String response = testDriver.sendRequest(VALUES_URI).readAll();
System.out.println(response);
}
@Test
void invalid_path_yields_error_response() throws Exception {
String response = testDriver.sendRequest(V1_URI + "/invalid").readAll();
JsonNode root = Jackson.mapper().readTree(response);
assertTrue(root.has("error"));
assertTrue(root.get("error").textValue().startsWith("No content"));
}
@Test
void values_response_is_equal_to_test_file() {
String response = testDriver.sendRequest(VALUES_URI).readAll();
assertEquals(RESPONSE, response);
}
@Test
void consumer_is_propagated_to_metrics_proxy_api() {
String response = testDriver.sendRequest(VALUES_URI + consumerQuery(CUSTOM_CONSUMER)).readAll();
assertTrue(response.contains(REPLACED_CPU_METRIC));
}
}
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