Martino Ferrari
81 lines
2.6 KiB
Go
81 lines
2.6 KiB
Go
//go:build epics
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package epics_test
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import (
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"context"
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"os"
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"testing"
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"time"
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"github.com/uopi/uopi/internal/datasource"
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"github.com/uopi/uopi/internal/datasource/epics"
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)
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// TestIntegration_SubscribeAndMetadata is an integration test that requires:
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// - EPICS_BASE to be set in the environment (i.e. EPICS Base is installed).
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// - TEST_PV to name a readable EPICS PV accessible via Channel Access.
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//
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// It connects to the named PV, waits up to 5 seconds for at least one value
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// update, and then verifies that the metadata contains a unit string.
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func TestIntegration_SubscribeAndMetadata(t *testing.T) {
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if os.Getenv("EPICS_BASE") == "" {
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t.Skip("EPICS_BASE not set; skipping EPICS integration test")
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}
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pvName := os.Getenv("TEST_PV")
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if pvName == "" {
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t.Skip("TEST_PV not set; skipping EPICS integration test")
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}
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ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
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defer cancel()
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ds := epics.New("", "") // rely on environment for CA addr list / EPICS_CA_ADDR_LIST
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if err := ds.Connect(ctx); err != nil {
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t.Fatalf("Connect: %v", err)
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}
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// Fetch metadata before subscribing so we exercise GetMetadata.
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meta, err := ds.GetMetadata(ctx, pvName)
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if err != nil {
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t.Fatalf("GetMetadata(%q): %v", pvName, err)
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}
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t.Logf("metadata: name=%q unit=%q type=%v displayLow=%v displayHigh=%v writable=%v",
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meta.Name, meta.Unit, meta.Type, meta.DisplayLow, meta.DisplayHigh, meta.Writable)
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// Subscribe and wait for at least one value update within 5 seconds.
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ch := make(chan datasource.Value, 8)
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cancelSub, err := ds.Subscribe(ctx, pvName, ch)
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if err != nil {
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t.Fatalf("Subscribe(%q): %v", pvName, err)
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}
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defer cancelSub()
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select {
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case v := <-ch:
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t.Logf("received value: ts=%v data=%v quality=%v", v.Timestamp, v.Data, v.Quality)
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if v.Quality == datasource.QualityBad {
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t.Errorf("expected QualityGood or QualityUncertain, got QualityBad")
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}
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case <-time.After(5 * time.Second):
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t.Fatal("timed out waiting for first value update from PV")
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case <-ctx.Done():
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t.Fatal("context expired before receiving a value")
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}
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// ListSignals should now return at least one entry (the one we just connected).
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signals, err := ds.ListSignals(ctx)
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if err != nil {
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t.Fatalf("ListSignals: %v", err)
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}
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if len(signals) == 0 {
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t.Error("ListSignals returned no signals after successful Subscribe")
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}
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// History should return ErrHistoryUnavailable when no archive URL is set.
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_, err = ds.History(ctx, pvName, time.Now().Add(-time.Hour), time.Now(), 100)
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if err != datasource.ErrHistoryUnavailable {
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t.Errorf("History with no archive URL: want ErrHistoryUnavailable, got %v", err)
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}
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}
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