initial test for AutoTrace

Author: duncanpo

test/autotrace_examples/example1/best_fit_line.m

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+function yf = best_fit_line(x, y)
+% example code for testing auto instrumentation
+
+% Copyright 2024 The MathWorks, Inc.
+
+coefs = polyfit(x, y, 1);
+yf = polyval(coefs , x);

test/autotrace_examples/example1/example1.m

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+function yf = example1(n)
+% example code for testing auto instrumentation. Input n is the number of
+% data points.
+
+% Copyright 2024 The MathWorks, Inc.
+
+[x, y] = generate_data(n);
+yf = best_fit_line(x,y);

test/autotrace_examples/example1/generate_data.m

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+function [x, y] = generate_data(n)
+% example code for testing auto instrumentation
+
+% Copyright 2024 The MathWorks, Inc.
+
+% generate some random data
+a = 1.5;
+b = 0.8;
+sigma = 5;
+x = 1:n;
+y = a * x + b + sigma * randn(1, n);

test/tautotrace.m

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+classdef tautotrace < matlab.unittest.TestCase
+    % tests for AutoTrace
+
+    % Copyright 2024 The MathWorks, Inc.
+
+    properties
+        OtelConfigFile
+        JsonFile
+        PidFile
+    	OtelcolName
+        Otelcol
+        ListPid
+        ReadPidList
+        ExtractPid
+        Sigint
+        Sigterm
+    end
+
+    methods (TestClassSetup)
+        function setupOnce(testCase)
+            % add the utils folder to the path
+            utilsfolder = fullfile(fileparts(mfilename('fullpath')), "utils");
+            testCase.applyFixture(matlab.unittest.fixtures.PathFixture(utilsfolder));
+            % add the example folder to the path
+            example1folder = fullfile(fileparts(mfilename('fullpath')), "autotrace_examples", "example1");
+            testCase.applyFixture(matlab.unittest.fixtures.PathFixture(example1folder));
+            commonSetupOnce(testCase);
+        end
+    end
+
+    methods (TestMethodSetup)
+        function setup(testCase)
+            commonSetup(testCase);
+        end
+    end
+
+    methods (TestMethodTeardown)
+        function teardown(testCase)
+            commonTeardown(testCase);
+        end
+    end
+
+    methods (Test)
+        function testBasic(testCase)
+            % testBasic: instrument a simple example
+
+            % configure the global tracer provider
+            tp = opentelemetry.sdk.trace.TracerProvider();
+            setTracerProvider(tp);
+            clear("tp");
+
+            % set up AutoTrace
+            at = opentelemetry.autoinstrument.AutoTrace(@example1);
+
+            % run the example
+            [~] = beginTrace(at, 100);
+
+            % perform test comparisons
+            results = readJsonResults(testCase);
+            verifyNumElements(testCase, results, 3);
+
+            % check logger name, log body and severity, trace and span IDs
+            verifyEqual(testCase, string(results{1}.resourceSpans.scopeSpans.scope.name), "AutoTrace");
+            verifyEqual(testCase, string(results{1}.resourceSpans.scopeSpans.spans.name), "generate_data");
+            verifyEqual(testCase, string(results{2}.resourceSpans.scopeSpans.spans.name), "best_fit_line");
+            verifyEqual(testCase, string(results{3}.resourceSpans.scopeSpans.spans.name), "example1");
+        end
+    end
+end