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namespace NpgsqlRestTests.StatsTests;
/// <summary>
/// Integration tests for PostgreSQL Stats endpoints.
/// These tests verify that:
/// - /stats/routines endpoint returns function/procedure statistics
/// - /stats/tables endpoint returns table statistics
/// - /stats/indexes endpoint returns index statistics
/// - /stats/activity endpoint returns current session activity
/// - Stats responses have correct format (JSON and TSV)
/// </summary>
[Collection("StatsTestFixture")]
public class StatsTests(StatsTestFixture test)
{
/// <summary>
/// Test that /stats/routines endpoint returns OK status.
/// </summary>
[Fact]
public async Task Routines_Endpoint_Should_Return_Ok()
{
// Act
using var response = await test.Client.GetAsync(StatsTestFixture.RoutinesPath);
// Assert
response.StatusCode.Should().Be(HttpStatusCode.OK,
"Routines stats endpoint should return 200 OK");
}
/// <summary>
/// Test that /stats/routines endpoint returns valid JSON array.
/// </summary>
[Fact]
public async Task Routines_Endpoint_Should_Return_Json_Array()
{
// Act
using var response = await test.Client.GetAsync(StatsTestFixture.RoutinesPath);
var content = await response.Content.ReadAsStringAsync();
// Assert
response.Content.Headers.ContentType?.MediaType.Should().Be("application/json",
"Routines stats should return JSON content type");
var json = JsonNode.Parse(content);
json.Should().NotBeNull();
json!.AsArray().Should().NotBeNull("Response should be a JSON array");
}
/// <summary>
/// Test that /stats/tables endpoint returns OK status.
/// </summary>
[Fact]
public async Task Tables_Endpoint_Should_Return_Ok()
{
// Act
using var response = await test.Client.GetAsync(StatsTestFixture.TablesPath);
// Assert
response.StatusCode.Should().Be(HttpStatusCode.OK,
"Tables stats endpoint should return 200 OK");
}
/// <summary>
/// Test that /stats/tables endpoint returns valid JSON with expected fields.
/// </summary>
[Fact]
public async Task Tables_Endpoint_Should_Return_Valid_Json_With_Expected_Fields()
{
// Act
using var response = await test.Client.GetAsync(StatsTestFixture.TablesPath);
var content = await response.Content.ReadAsStringAsync();
// Assert
var json = JsonNode.Parse(content);
json.Should().NotBeNull();
var array = json!.AsArray();
array.Should().NotBeNull();
// Should have at least our test table
array.Count.Should().BeGreaterThan(0, "Should have at least one table");
// Check that expected fields exist
var firstRow = array[0]!.AsObject();
firstRow.ContainsKey("schema").Should().BeTrue();
firstRow.ContainsKey("name").Should().BeTrue();
firstRow.ContainsKey("liveTuples").Should().BeTrue();
firstRow.ContainsKey("deadTuples").Should().BeTrue();
firstRow.ContainsKey("totalSize").Should().BeTrue();
}
/// <summary>
/// Test that /stats/indexes endpoint returns OK status.
/// </summary>
[Fact]
public async Task Indexes_Endpoint_Should_Return_Ok()
{
// Act
using var response = await test.Client.GetAsync(StatsTestFixture.IndexesPath);
// Assert
response.StatusCode.Should().Be(HttpStatusCode.OK,
"Indexes stats endpoint should return 200 OK");
}
/// <summary>
/// Test that /stats/indexes endpoint returns valid JSON with expected fields.
/// </summary>
[Fact]
public async Task Indexes_Endpoint_Should_Return_Valid_Json_With_Expected_Fields()
{
// Act
using var response = await test.Client.GetAsync(StatsTestFixture.IndexesPath);
var content = await response.Content.ReadAsStringAsync();
// Assert
var json = JsonNode.Parse(content);
json.Should().NotBeNull();
var array = json!.AsArray();
array.Should().NotBeNull();
// Should have at least our test index
array.Count.Should().BeGreaterThan(0, "Should have at least one index");
// Check that expected fields exist
var firstRow = array[0]!.AsObject();
firstRow.ContainsKey("schema").Should().BeTrue();
firstRow.ContainsKey("table").Should().BeTrue();
firstRow.ContainsKey("index").Should().BeTrue();
firstRow.ContainsKey("isUnique").Should().BeTrue();
firstRow.ContainsKey("definition").Should().BeTrue();
}
/// <summary>
/// Test that /stats/activity endpoint returns OK status.
/// </summary>
[Fact]
public async Task Activity_Endpoint_Should_Return_Ok()
{
// Act
using var response = await test.Client.GetAsync(StatsTestFixture.ActivityPath);
// Assert
response.StatusCode.Should().Be(HttpStatusCode.OK,
"Activity stats endpoint should return 200 OK");
}
/// <summary>
/// Test that /stats/activity endpoint returns valid JSON array.
/// </summary>
[Fact]
public async Task Activity_Endpoint_Should_Return_Json_Array()
{
// Act
using var response = await test.Client.GetAsync(StatsTestFixture.ActivityPath);
var content = await response.Content.ReadAsStringAsync();
// Assert
response.Content.Headers.ContentType?.MediaType.Should().Be("application/json",
"Activity stats should return JSON content type");
var json = JsonNode.Parse(content);
json.Should().NotBeNull();
json!.AsArray().Should().NotBeNull("Response should be a JSON array");
}
/// <summary>
/// Test that HTML format returns HTML table.
/// </summary>
[Fact]
public async Task Tables_Endpoint_Html_Should_Return_Html_Table()
{
// Act
using var response = await test.Client.GetAsync("/stats/tables-html");
var content = await response.Content.ReadAsStringAsync();
// Assert
response.StatusCode.Should().Be(HttpStatusCode.OK);
response.Content.Headers.ContentType?.MediaType.Should().Be("text/html",
"HTML endpoint should return text/html content type");
// Should have HTML table structure
content.Should().Contain("<table", "Should contain table element");
content.Should().Contain("</table>", "Should contain closing table element");
content.Should().Contain("<th>", "Should contain header cells");
content.Should().Contain("<td>", "Should contain data cells");
content.Should().Contain("schema", "Should contain schema column");
content.Should().Contain("name", "Should contain name column");
}
/// <summary>
/// Test that stats endpoints respond quickly (basic latency test).
/// </summary>
[Fact]
public async Task Stats_Endpoints_Should_Respond_Quickly()
{
// Act & Assert - each endpoint should respond within 5 seconds
var sw = System.Diagnostics.Stopwatch.StartNew();
using var routinesResponse = await test.Client.GetAsync(StatsTestFixture.RoutinesPath);
routinesResponse.EnsureSuccessStatusCode();
sw.Elapsed.Should().BeLessThan(TimeSpan.FromSeconds(5),
"/stats/routines should respond within 5 seconds");
sw.Restart();
using var tablesResponse = await test.Client.GetAsync(StatsTestFixture.TablesPath);
tablesResponse.EnsureSuccessStatusCode();
sw.Elapsed.Should().BeLessThan(TimeSpan.FromSeconds(5),
"/stats/tables should respond within 5 seconds");
sw.Restart();
using var indexesResponse = await test.Client.GetAsync(StatsTestFixture.IndexesPath);
indexesResponse.EnsureSuccessStatusCode();
sw.Elapsed.Should().BeLessThan(TimeSpan.FromSeconds(5),
"/stats/indexes should respond within 5 seconds");
sw.Restart();
using var activityResponse = await test.Client.GetAsync(StatsTestFixture.ActivityPath);
activityResponse.EnsureSuccessStatusCode();
sw.Elapsed.Should().BeLessThan(TimeSpan.FromSeconds(5),
"/stats/activity should respond within 5 seconds");
}
/// <summary>
/// Test that multiple concurrent stats requests work correctly.
/// </summary>
[Fact]
public async Task Concurrent_Stats_Requests_Should_Work()
{
// Arrange
var tasks = new List<Task<HttpResponseMessage>>();
// Act - send 5 concurrent requests to each endpoint
for (int i = 0; i < 5; i++)
{
tasks.Add(test.Client.GetAsync(StatsTestFixture.RoutinesPath));
tasks.Add(test.Client.GetAsync(StatsTestFixture.TablesPath));
tasks.Add(test.Client.GetAsync(StatsTestFixture.IndexesPath));
tasks.Add(test.Client.GetAsync(StatsTestFixture.ActivityPath));
}
var responses = await Task.WhenAll(tasks);
// Assert - all should succeed
foreach (var response in responses)
{
response.StatusCode.Should().Be(HttpStatusCode.OK);
response.Dispose();
}
}
/// <summary>
/// Test that invalid stats path returns 404.
/// </summary>
[Fact]
public async Task Invalid_Stats_Path_Should_Return_NotFound()
{
// Act
using var response = await test.Client.GetAsync("/stats/invalid");
// Assert
response.StatusCode.Should().Be(HttpStatusCode.NotFound,
"Invalid stats path should return 404");
}
}
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