[Exporter.Geneva] Add data validation for MetricExportIntervalMilliseconds

src/OpenTelemetry.Exporter.Geneva/GenevaMetricExporterOptions.cs

@@ -24,6 +24,7 @@ namespace OpenTelemetry.Exporter.Geneva;
 public class GenevaMetricExporterOptions
 {
     private IReadOnlyDictionary<string, object> _prepopulatedMetricDimensions;
+    private int _metricExporterIntervalMilliseconds = 20000;
 
     /// <summary>
     /// Gets or sets the ConnectionString which contains semicolon separated list of key-value pairs.
@@ -34,7 +35,20 @@ public class GenevaMetricExporterOptions
     /// <summary>
     /// Gets or sets the metric export interval in milliseconds. The default value is 20000.
     /// </summary>
-    public int MetricExportIntervalMilliseconds { get; set; } = 20000;
+    public int MetricExportIntervalMilliseconds
+    {
+        get
+        {
+            return this._metricExporterIntervalMilliseconds;
+        }
+
+        set
+        {
+            Guard.ThrowIfOutOfRange(value, min: 1000);
+
+            this._metricExporterIntervalMilliseconds = value;
+        }
+    }
 
     /// <summary>
     /// Gets or sets the pre-populated dimensions for all the metrics exported by the exporter.

test/OpenTelemetry.Exporter.Geneva.Tests/GenevaMetricExporterOptionsTests.cs

@@ -69,5 +69,27 @@ [new string('a', GenevaMetricExporter.MaxDimensionNameSize + 1)] = "DimensionVal
             expectedErrorMessage = $"Value provided for the dimension: DimensionKey exceeds the maximum allowed limit of {GenevaMetricExporter.MaxDimensionValueSize} characters for dimension value.";
             Assert.Equal(expectedErrorMessage, invalidDimensionValueException.Message);
         }
+
+        [Fact]
+        public void MetricExportIntervalValidationTest()
+        {
+            Assert.Throws<ArgumentOutOfRangeException>(() =>
+            {
+                var exporterOptions = new GenevaMetricExporterOptions
+                {
+                    MetricExportIntervalMilliseconds = 999,
+                };
+            });
+
+            var exception = Record.Exception(() =>
+            {
+                var exporterOptions = new GenevaMetricExporterOptions
+                {
+                    MetricExportIntervalMilliseconds = 1000,
+                };
+            });
+
+            Assert.Null(exception);
+        }
     }
 }